1 Minetest Lua Modding API Reference 0.4.15
2 =========================================
3 * More information at <http://www.minetest.net/>
4 * Developer Wiki: <http://dev.minetest.net/>
8 Content and functionality can be added to Minetest 0.4 by using Lua
9 scripting in run-time loaded mods.
11 A mod is a self-contained bunch of scripts, textures and other related
12 things that is loaded by and interfaces with Minetest.
14 Mods are contained and ran solely on the server side. Definitions and media
15 files are automatically transferred to the client.
17 If you see a deficiency in the API, feel free to attempt to add the
18 functionality in the engine and API. You can send such improvements as
19 source code patches to <celeron55@gmail.com>.
23 If you have any difficulty in understanding this, please read
24 [Programming in Lua](http://www.lua.org/pil/).
28 Mods are loaded during server startup from the mod load paths by running
29 the `init.lua` scripts in a shared environment.
33 * `RUN_IN_PLACE=1` (Windows release, local build)
35 * Linux: `<build directory>`
36 * Windows: `<build directory>`
38 * Linux: `<build directory>`
39 * Windows: `<build directory>`
40 * `RUN_IN_PLACE=0`: (Linux release)
42 * Linux: `/usr/share/minetest`
43 * Windows: `<install directory>/minetest-0.4.x`
45 * Linux: `$HOME/.minetest`
46 * Windows: `C:/users/<user>/AppData/minetest` (maybe)
50 Games are looked up from:
52 * `$path_share/games/gameid/`
53 * `$path_user/games/gameid/`
55 where `gameid` is unique to each game.
57 The game directory contains the file `game.conf`, which contains these fields:
59 name = <Human-readable full name of the game>
65 The game directory can contain the file minetest.conf, which will be used
66 to set default settings when running the particular game.
67 It can also contain a settingtypes.txt in the same format as the one in builtin.
68 This settingtypes.txt will be parsed by the menu and the settings will be displayed
69 in the "Games" category in the settings tab.
73 Games can provide custom main menu images. They are put inside a `menu` directory
74 inside the game directory.
76 The images are named `$identifier.png`, where `$identifier` is
77 one of `overlay,background,footer,header`.
78 If you want to specify multiple images for one identifier, add additional images named
79 like `$identifier.$n.png`, with an ascending number $n starting with 1, and a random
80 image will be chosen from the provided ones.
87 * `$path_share/games/gameid/mods/`
89 * `$path_user/games/gameid/mods/`
90 * `$path_user/mods/` (User-installed mods)
91 * `$worldpath/worldmods/`
93 In a run-in-place version (e.g. the distributed windows version):
95 * `minetest-0.4.x/games/gameid/mods/`
96 * `minetest-0.4.x/mods/` (User-installed mods)
97 * `minetest-0.4.x/worlds/worldname/worldmods/`
99 On an installed version on Linux:
101 * `/usr/share/minetest/games/gameid/mods/`
102 * `$HOME/.minetest/mods/` (User-installed mods)
103 * `$HOME/.minetest/worlds/worldname/worldmods`
105 Mod load path for world-specific games
106 --------------------------------------
107 It is possible to include a game in a world; in this case, no mods or
108 games are loaded or checked from anywhere else.
110 This is useful for e.g. adventure worlds.
112 This happens if the following directory exists:
116 Mods should be then be placed in:
122 Mods can be put in a subdirectory, if the parent directory, which otherwise
123 should be a mod, contains a file named `modpack.txt`. This file shall be
124 empty, except for lines starting with `#`, which are comments.
126 Mod directory structure
127 ------------------------
133 | |-- description.txt
134 | |-- settingtypes.txt
138 | | |-- modname_stuff.png
139 | | `-- modname_something_else.png
147 The location of this directory can be fetched by using
148 `minetest.get_modpath(modname)`.
151 List of mods that have to be loaded before loading this mod.
153 A single line contains a single modname.
155 Optional dependencies can be defined by appending a question mark
156 to a single modname. Their meaning is that if the specified mod
157 is missing, that does not prevent this mod from being loaded.
160 A screenshot shown in the mod manager within the main menu. It should
161 have an aspect ratio of 3:2 and a minimum size of 300×200 pixels.
163 ### `description.txt`
164 A File containing description to be shown within mainmenu.
166 ### `settingtypes.txt`
167 A file in the same format as the one in builtin. It will be parsed by the
168 settings menu and the settings will be displayed in the "Mods" category.
171 The main Lua script. Running this script should register everything it
172 wants to register. Subsequent execution depends on minetest calling the
173 registered callbacks.
175 `minetest.setting_get(name)` and `minetest.setting_getbool(name)` can be used
176 to read custom or existing settings at load time, if necessary.
179 Models for entities or meshnodes.
181 ### `textures`, `sounds`, `media`
182 Media files (textures, sounds, whatever) that will be transferred to the
183 client and will be available for use by the mod.
185 Naming convention for registered textual names
186 ----------------------------------------------
187 Registered names should generally be in this format:
189 "modname:<whatever>" (<whatever> can have characters a-zA-Z0-9_)
191 This is to prevent conflicting names from corrupting maps and is
192 enforced by the mod loader.
195 In the mod `experimental`, there is the ideal item/node/entity name `tnt`.
196 So the name should be `experimental:tnt`.
198 Enforcement can be overridden by prefixing the name with `:`. This can
199 be used for overriding the registrations of some other mod.
201 Example: Any mod can redefine `experimental:tnt` by using the name
206 (also that mod is required to have `experimental` as a dependency)
208 The `:` prefix can also be used for maintaining backwards compatibility.
211 Aliases can be added by using `minetest.register_alias(name, convert_to)` or
212 `minetest.register_alias_force(name, convert_to).
214 This will make Minetest to convert things called name to things called
217 The only difference between `minetest.register_alias` and
218 `minetest.register_alias_force` is that if an item called `name` exists,
219 `minetest.register_alias` will do nothing while
220 `minetest.register_alias_force` will unregister it.
222 This can be used for maintaining backwards compatibility.
224 This can be also used for setting quick access names for things, e.g. if
225 you have an item called `epiclylongmodname:stuff`, you could do
227 minetest.register_alias("stuff", "epiclylongmodname:stuff")
229 and be able to use `/giveme stuff`.
233 Mods should generally prefix their textures with `modname_`, e.g. given
234 the mod name `foomod`, a texture could be called:
238 Textures are referred to by their complete name, or alternatively by
239 stripping out the file extension:
241 * e.g. `foomod_foothing.png`
242 * e.g. `foomod_foothing`
246 There are various texture modifiers that can be used
247 to generate textures on-the-fly.
249 ### Texture overlaying
250 Textures can be overlaid by putting a `^` between them.
254 default_dirt.png^default_grass_side.png
256 `default_grass_side.png` is overlayed over `default_dirt.png`.
257 The texture with the lower resolution will be automatically upscaled to
258 the higher resolution texture.
261 Textures can be grouped together by enclosing them in `(` and `)`.
263 Example: `cobble.png^(thing1.png^thing2.png)`
265 A texture for `thing1.png^thing2.png` is created and the resulting
266 texture is overlaid on top of `cobble.png`.
269 Modifiers that accept texture names (e.g. `[combine`) accept escaping to allow
270 passing complex texture names as arguments. Escaping is done with backslash and
271 is required for `^` and `:`.
273 Example: `cobble.png^[lowpart:50:color.png\^[mask\:trans.png`
275 The lower 50 percent of `color.png^[mask:trans.png` are overlaid
276 on top of `cobble.png`.
278 ### Advanced texture modifiers
280 #### `[crack:<n>:<p>`
281 * `<n>` = animation frame count
282 * `<p>` = current animation frame
284 Draw a step of the crack animation on the texture.
288 default_cobble.png^[crack:10:1
290 #### `[combine:<w>x<h>:<x1>,<y1>=<file1>:<x2>,<y2>=<file2>:...`
295 * `<file>` = texture to combine
297 Creates a texture of size `<w>` times `<h>` and blits the listed files to their
298 specified coordinates.
302 [combine:16x32:0,0=default_cobble.png:0,16=default_wood.png
304 #### `[resize:<w>x<h>`
305 Resizes the texture to the given dimensions.
309 default_sandstone.png^[resize:16x16
312 Makes the base image transparent according to the given ratio.
313 r must be between 0 and 255.
314 0 means totally transparent.
315 255 means totally opaque.
319 default_sandstone.png^[opacity:127
321 #### `[invert:<mode>`
322 Inverts the given channels of the base image.
323 Mode may contain the characters "r", "g", "b", "a".
324 Only the channels that are mentioned in the mode string will be inverted.
328 default_apple.png^[invert:rgb
331 Brightens the texture.
335 tnt_tnt_side.png^[brighten
338 Makes the texture completely opaque.
342 default_leaves.png^[noalpha
344 #### `[makealpha:<r>,<g>,<b>`
345 Convert one color to transparency.
349 default_cobble.png^[makealpha:128,128,128
352 * `<t>` = transformation(s) to apply
354 Rotates and/or flips the image.
356 `<t>` can be a number (between 0 and 7) or a transform name.
357 Rotations are counter-clockwise.
360 1 R90 rotate by 90 degrees
361 2 R180 rotate by 180 degrees
362 3 R270 rotate by 270 degrees
364 5 FXR90 flip X then rotate by 90 degrees
366 7 FYR90 flip Y then rotate by 90 degrees
370 default_stone.png^[transformFXR90
372 #### `[inventorycube{<top>{<left>{<right>`
373 Escaping does not apply here and `^` is replaced by `&` in texture names instead.
375 Create an inventory cube texture using the side textures.
379 [inventorycube{grass.png{dirt.png&grass_side.png{dirt.png&grass_side.png
381 Creates an inventorycube with `grass.png`, `dirt.png^grass_side.png` and
382 `dirt.png^grass_side.png` textures
384 #### `[lowpart:<percent>:<file>`
385 Blit the lower `<percent>`% part of `<file>` on the texture.
389 base.png^[lowpart:25:overlay.png
391 #### `[verticalframe:<t>:<n>`
392 * `<t>` = animation frame count
393 * `<n>` = current animation frame
395 Crops the texture to a frame of a vertical animation.
399 default_torch_animated.png^[verticalframe:16:8
402 Apply a mask to the base image.
404 The mask is applied using binary AND.
406 #### `[sheet:<w>x<h>:<x>,<y>`
407 Retrieves a tile at position x,y from the base image
408 which it assumes to be a tilesheet with dimensions w,h.
411 #### `[colorize:<color>:<ratio>`
412 Colorize the textures with the given color.
413 `<color>` is specified as a `ColorString`.
414 `<ratio>` is an int ranging from 0 to 255 or the word "`alpha`". If
415 it is an int, then it specifies how far to interpolate between the
416 colors where 0 is only the texture color and 255 is only `<color>`. If
417 omitted, the alpha of `<color>` will be used as the ratio. If it is
418 the word "`alpha`", then each texture pixel will contain the RGB of
419 `<color>` and the alpha of `<color>` multiplied by the alpha of the
422 #### `[multiply:<color>`
423 Multiplies texture colors with the given color.
424 `<color>` is specified as a `ColorString`.
425 Result is more like what you'd expect if you put a color on top of another
426 color. Meaning white surfaces get a lot of your new color while black parts don't
431 Only Ogg Vorbis files are supported.
433 For positional playing of sounds, only single-channel (mono) files are
434 supported. Otherwise OpenAL will play them non-positionally.
436 Mods should generally prefix their sounds with `modname_`, e.g. given
437 the mod name "`foomod`", a sound could be called:
441 Sounds are referred to by their name with a dot, a single digit and the
442 file extension stripped out. When a sound is played, the actual sound file
443 is chosen randomly from the matching sounds.
445 When playing the sound `foomod_foosound`, the sound is chosen randomly
446 from the available ones of the following files:
448 * `foomod_foosound.ogg`
449 * `foomod_foosound.0.ogg`
450 * `foomod_foosound.1.ogg`
452 * `foomod_foosound.9.ogg`
454 Examples of sound parameter tables:
456 -- Play locationless on all clients
458 gain = 1.0, -- default
459 fade = 0.0, -- default, change to a value > 0 to fade the sound in
461 -- Play locationless to one player
464 gain = 1.0, -- default
465 fade = 0.0, -- default, change to a value > 0 to fade the sound in
467 -- Play locationless to one player, looped
470 gain = 1.0, -- default
473 -- Play in a location
475 pos = {x = 1, y = 2, z = 3},
476 gain = 1.0, -- default
477 max_hear_distance = 32, -- default, uses an euclidean metric
479 -- Play connected to an object, looped
481 object = <an ObjectRef>,
482 gain = 1.0, -- default
483 max_hear_distance = 32, -- default, uses an euclidean metric
487 Looped sounds must either be connected to an object or played locationless to
488 one player using `to_player = name,`
490 ### `SimpleSoundSpec`
492 * e.g. `"default_place_node"`
494 * e.g. `{name = "default_place_node"}`
495 * e.g. `{name = "default_place_node", gain = 1.0}`
497 Registered definitions of stuff
498 -------------------------------
499 Anything added using certain `minetest.register_*` functions get added to
500 the global `minetest.registered_*` tables.
502 * `minetest.register_entity(name, prototype table)`
503 * added to `minetest.registered_entities[name]`
505 * `minetest.register_node(name, node definition)`
506 * added to `minetest.registered_items[name]`
507 * added to `minetest.registered_nodes[name]`
509 * `minetest.register_tool(name, item definition)`
510 * added to `minetest.registered_items[name]`
512 * `minetest.register_craftitem(name, item definition)`
513 * added to `minetest.registered_items[name]`
515 * `minetest.unregister_item(name)`
516 * Unregisters the item name from engine, and deletes the entry with key
517 * `name` from `minetest.registered_items` and from the associated item
518 * table according to its nature: minetest.registered_nodes[] etc
520 * `minetest.register_biome(biome definition)`
521 * returns an integer uniquely identifying the registered biome
522 * added to `minetest.registered_biome` with the key of `biome.name`
523 * if `biome.name` is nil, the key is the returned ID
525 * `minetest.register_ore(ore definition)`
526 * returns an integer uniquely identifying the registered ore
527 * added to `minetest.registered_ores` with the key of `ore.name`
528 * if `ore.name` is nil, the key is the returned ID
530 * `minetest.register_decoration(decoration definition)`
531 * returns an integer uniquely identifying the registered decoration
532 * added to `minetest.registered_decorations` with the key of `decoration.name`
533 * if `decoration.name` is nil, the key is the returned ID
535 * `minetest.register_schematic(schematic definition)`
536 * returns an integer uniquely identifying the registered schematic
537 * added to `minetest.registered_schematic` with the key of `schematic.name`
538 * if `schematic.name` is nil, the key is the returned ID
539 * if the schematic is loaded from a file, schematic.name is set to the filename
540 * if the function is called when loading the mod, and schematic.name is a relative
541 path, then the current mod path will be prepended to the schematic filename
543 * `minetest.clear_registered_biomes()`
544 * clears all biomes currently registered
546 * `minetest.clear_registered_ores()`
547 * clears all ores currently registered
549 * `minetest.clear_registered_decorations()`
550 * clears all decorations currently registered
552 * `minetest.clear_registered_schematics()`
553 * clears all schematics currently registered
555 Note that in some cases you will stumble upon things that are not contained
556 in these tables (e.g. when a mod has been removed). Always check for
557 existence before trying to access the fields.
559 Example: If you want to check the drawtype of a node, you could do:
561 local function get_nodedef_field(nodename, fieldname)
562 if not minetest.registered_nodes[nodename] then
565 return minetest.registered_nodes[nodename][fieldname]
567 local drawtype = get_nodedef_field(nodename, "drawtype")
569 Example: `minetest.get_item_group(name, group)` has been implemented as:
571 function minetest.get_item_group(name, group)
572 if not minetest.registered_items[name] or not
573 minetest.registered_items[name].groups[group] then
576 return minetest.registered_items[name].groups[group]
581 Nodes are the bulk data of the world: cubes and other things that take the
582 space of a cube. Huge amounts of them are handled efficiently, but they
585 The definition of a node is stored and can be accessed by name in
587 minetest.registered_nodes[node.name]
589 See "Registered definitions of stuff".
591 Nodes are passed by value between Lua and the engine.
592 They are represented by a table:
594 {name="name", param1=num, param2=num}
596 `param1` and `param2` are 8-bit integers. The engine uses them for certain
597 automated functions. If you don't use these functions, you can use them to
598 store arbitrary values.
600 The functions of `param1` and `param2` are determined by certain fields in the
603 `param1` is reserved for the engine when `paramtype != "none"`:
606 ^ The value stores light with and without sun in its upper and lower 4 bits
607 respectively. Allows light to propagate from or through the node with
608 light value falling by 1 per node. This is essential for a light source
609 node to spread its light.
611 `param2` is reserved for the engine when any of these are used:
613 liquidtype == "flowing"
614 ^ The level and some flags of the liquid is stored in param2
615 drawtype == "flowingliquid"
616 ^ The drawn liquid level is read from param2
617 drawtype == "torchlike"
618 drawtype == "signlike"
619 paramtype2 == "wallmounted"
620 ^ The rotation of the node is stored in param2. You can make this value
621 by using minetest.dir_to_wallmounted().
622 paramtype2 == "facedir"
623 ^ The rotation of the node is stored in param2. Furnaces and chests are
624 rotated this way. Can be made by using minetest.dir_to_facedir().
626 facedir / 4 = axis direction:
627 0 = y+ 1 = z+ 2 = z- 3 = x+ 4 = x- 5 = y-
628 facedir modulo 4 = rotation around that axis
629 paramtype2 == "leveled"
630 paramtype2 == "degrotate"
631 ^ The rotation of this node is stored in param2. Plants are rotated this way.
632 Values range 0 - 179. The value stored in param2 is multiplied by two to
633 get the actual rotation of the node.
634 paramtype2 == "meshoptions"
635 ^ Only valid for "plantlike". The value of param2 becomes a bitfield which can
636 be used to change how the client draws plantlike nodes. Bits 0, 1 and 2 form
637 a mesh selector. Currently the following meshes are choosable:
638 0 = a "x" shaped plant (ordinary plant)
639 1 = a "+" shaped plant (just rotated 45 degrees)
640 2 = a "*" shaped plant with 3 faces instead of 2
641 3 = a "#" shaped plant with 4 faces instead of 2
642 4 = a "#" shaped plant with 4 faces that lean outwards
643 5-7 are unused and reserved for future meshes.
644 Bits 3 through 7 are optional flags that can be combined and give these
646 bit 3 (0x08) - Makes the plant slightly vary placement horizontally
647 bit 4 (0x10) - Makes the plant mesh 1.4x larger
648 bit 5 (0x20) - Moves each face randomly a small bit down (1/8 max)
649 bits 6-7 are reserved for future use.
650 paramtype2 == "color"
651 ^ `param2` tells which color is picked from the palette.
652 The palette should have 256 pixels.
653 paramtype2 == "colorfacedir"
654 ^ Same as `facedir`, but with colors.
655 The first three bits of `param2` tells which color
656 is picked from the palette.
657 The palette should have 8 pixels.
658 paramtype2 == "colorwallmounted"
659 ^ Same as `wallmounted`, but with colors.
660 The first five bits of `param2` tells which color
661 is picked from the palette.
662 The palette should have 32 pixels.
663 paramtype2 == "glasslikeliquidlevel"
664 ^ Only valid for "glasslike_framed" or "glasslike_framed_optional" drawtypes.
665 param2 defines 64 levels of internal liquid.
666 Liquid texture is defined using `special_tiles = {"modname_tilename.png"},`
670 {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
673 ^ defines list of collision boxes for the node. If empty, collision boxes
674 will be the same as nodeboxes, in case of any other nodes will be full cube
675 as in the example above.
677 Nodes can also contain extra data. See "Node Metadata".
681 There are a bunch of different looking node types.
683 Look for examples in `games/minimal` or `games/minetest_game`.
691 * `glasslike_framed_optional`
693 * `allfaces_optional`
700 * `nodebox` -- See below. (**Experimental!**)
701 * `mesh` -- use models for nodes
703 `*_optional` drawtypes need less rendering time if deactivated (always client side).
707 Node selection boxes are defined using "node boxes"
709 The `nodebox` node drawtype allows defining visual of nodes consisting of
710 arbitrary number of boxes. It allows defining stuff like stairs. Only the
711 `fixed` and `leveled` box type is supported for these.
713 Please note that this is still experimental, and may be incompatibly
714 changed in the future.
716 A nodebox is defined as any of:
719 -- A normal cube; the default in most things
723 -- A fixed box (facedir param2 is used, if applicable)
725 fixed = box OR {box1, box2, ...}
728 -- A box like the selection box for torches
729 -- (wallmounted param2 is used, if applicable)
730 type = "wallmounted",
736 -- A node that has optional boxes depending on neighbouring nodes'
737 -- presence and type. See also `connects_to`.
739 fixed = box OR {box1, box2, ...}
740 connect_top = box OR {box1, box2, ...}
741 connect_bottom = box OR {box1, box2, ...}
742 connect_front = box OR {box1, box2, ...}
743 connect_left = box OR {box1, box2, ...}
744 connect_back = box OR {box1, box2, ...}
745 connect_right = box OR {box1, box2, ...}
748 A `box` is defined as:
750 {x1, y1, z1, x2, y2, z2}
752 A box of a regular node would look like:
754 {-0.5, -0.5, -0.5, 0.5, 0.5, 0.5},
756 `type = "leveled"` is same as `type = "fixed"`, but `y2` will be automatically
757 set to level from `param2`.
762 If drawtype `mesh` is used, tiles should hold model materials textures.
763 Only static meshes are implemented.
764 For supported model formats see Irrlicht engine documentation.
769 Noise Parameters, or commonly called "`NoiseParams`", define the properties of
773 Offset that the noise is translated by (i.e. added) after calculation.
776 Factor that the noise is scaled by (i.e. multiplied) after calculation.
779 Vector containing values by which each coordinate is divided by before calculation.
780 Higher spread values result in larger noise features.
782 A value of `{x=250, y=250, z=250}` is common.
785 Random seed for the noise. Add the world seed to a seed offset for world-unique noise.
786 In the case of `minetest.get_perlin()`, this value has the world seed automatically added.
789 Number of times the noise gradient is accumulated into the noise.
791 Increase this number to increase the amount of detail in the resulting noise.
793 A value of `6` is common.
796 Factor by which the effect of the noise gradient function changes with each successive octave.
798 Values less than `1` make the details of successive octaves' noise diminish, while values
799 greater than `1` make successive octaves stronger.
801 A value of `0.6` is common.
804 Factor by which the noise feature sizes change with each successive octave.
806 A value of `2.0` is common.
809 Leave this field unset for no special handling.
811 Currently supported are `defaults`, `eased` and `absvalue`.
814 Specify this if you would like to keep auto-selection of eased/not-eased while specifying
818 Maps noise gradient values onto a quintic S-curve before performing interpolation.
819 This results in smooth, rolling noise. Disable this (`noeased`) for sharp-looking noise.
820 If no flags are specified (or defaults is), 2D noise is eased and 3D noise is not eased.
823 Accumulates the absolute value of each noise gradient result.
825 Noise parameters format example for 2D or 3D perlin noise or perlin noise maps:
829 spread = {x=500, y=500, z=500},
834 flags = "defaults, absvalue"
836 ^ A single noise parameter table can be used to get 2D or 3D noise,
837 when getting 2D noise spread.z is ignored.
842 These tell in what manner the ore is generated.
844 All default ores are of the uniformly-distributed scatter type.
847 Randomly chooses a location and generates a cluster of ore.
849 If `noise_params` is specified, the ore will be placed if the 3D perlin noise at
850 that point is greater than the `noise_threshold`, giving the ability to create
851 a non-equal distribution of ore.
854 Creates a sheet of ore in a blob shape according to the 2D perlin noise
855 described by `noise_params` and `noise_threshold`. This is essentially an
856 improved version of the so-called "stratus" ore seen in some unofficial mods.
858 This sheet consists of vertical columns of uniform randomly distributed height,
859 varying between the inclusive range `column_height_min` and `column_height_max`.
860 If `column_height_min` is not specified, this parameter defaults to 1.
861 If `column_height_max` is not specified, this parameter defaults to `clust_size`
862 for reverse compatibility. New code should prefer `column_height_max`.
864 The `column_midpoint_factor` parameter controls the position of the column at which
865 ore eminates from. If 1, columns grow upward. If 0, columns grow downward. If 0.5,
866 columns grow equally starting from each direction. `column_midpoint_factor` is a
867 decimal number ranging in value from 0 to 1. If this parameter is not specified,
870 The ore parameters `clust_scarcity` and `clust_num_ores` are ignored for this ore type.
873 Creates a sheet of ore in a cloud-like puff shape.
875 As with the `sheet` ore type, the size and shape of puffs are described by
876 `noise_params` and `noise_threshold` and are placed at random vertical positions
877 within the currently generated chunk.
879 The vertical top and bottom displacement of each puff are determined by the noise
880 parameters `np_puff_top` and `np_puff_bottom`, respectively.
884 Creates a deformed sphere of ore according to 3d perlin noise described by
885 `noise_params`. The maximum size of the blob is `clust_size`, and
886 `clust_scarcity` has the same meaning as with the `scatter` type.
889 Creates veins of ore varying in density by according to the intersection of two
890 instances of 3d perlin noise with diffferent seeds, both described by
891 `noise_params`. `random_factor` varies the influence random chance has on
892 placement of an ore inside the vein, which is `1` by default. Note that
893 modifying this parameter may require adjusting `noise_threshold`.
894 The parameters `clust_scarcity`, `clust_num_ores`, and `clust_size` are ignored
895 by this ore type. This ore type is difficult to control since it is sensitive
896 to small changes. The following is a decent set of parameters to work from:
901 spread = {x=200, y=200, z=200},
907 noise_threshold = 1.6
909 WARNING: Use this ore type *very* sparingly since it is ~200x more
910 computationally expensive than any other ore.
914 See section "Flag Specifier Format".
916 Currently supported flags: `absheight`
919 Also produce this same ore between the height range of `-y_max` and `-y_min`.
921 Useful for having ore in sky realms without having to duplicate ore entries.
924 If set, puff ore generation will not taper down large differences in displacement
925 when approaching the edge of a puff. This flag has no effect for ore types other
928 ### `puff_additive_composition`
929 By default, when noise described by `np_puff_top` or `np_puff_bottom` results in a
930 negative displacement, the sub-column at that point is not generated. With this
931 attribute set, puff ore generation will instead generate the absolute difference in
932 noise displacement values. This flag has no effect for ore types other than `puff`.
936 The varying types of decorations that can be placed.
939 Creates a 1 times `H` times 1 column of a specified node (or a random node from
940 a list, if a decoration list is specified). Can specify a certain node it must
941 spawn next to, such as water or lava, for example. Can also generate a
942 decoration of random height between a specified lower and upper bound.
943 This type of decoration is intended for placement of grass, flowers, cacti,
944 papyri, waterlilies and so on.
947 Copies a box of `MapNodes` from a specified schematic file (or raw description).
948 Can specify a probability of a node randomly appearing when placed.
949 This decoration type is intended to be used for multi-node sized discrete
950 structures, such as trees, cave spikes, rocks, and so on.
955 A schematic specifier identifies a schematic by either a filename to a
956 Minetest Schematic file (`.mts`) or through raw data supplied through Lua,
957 in the form of a table. This table specifies the following fields:
959 * The `size` field is a 3D vector containing the dimensions of the provided schematic. (required)
960 * The `yslice_prob` field is a table of {ypos, prob} which sets the `ypos`th vertical slice
961 of the schematic to have a `prob / 256 * 100` chance of occuring. (default: 255)
962 * The `data` field is a flat table of MapNode tables making up the schematic,
963 in the order of `[z [y [x]]]`. (required)
964 Each MapNode table contains:
965 * `name`: the name of the map node to place (required)
966 * `prob` (alias `param1`): the probability of this node being placed (default: 255)
967 * `param2`: the raw param2 value of the node being placed onto the map (default: 0)
968 * `force_place`: boolean representing if the node should forcibly overwrite any
969 previous contents (default: false)
971 About probability values:
972 * A probability value of `0` or `1` means that node will never appear (0% chance).
973 * A probability value of `254` or `255` means the node will always appear (100% chance).
974 * If the probability value `p` is greater than `1`, then there is a
975 `(p / 256 * 100)` percent chance that node will appear when the schematic is
981 See section "Flag Specifier Format".
983 Currently supported flags: `place_center_x`, `place_center_y`, `place_center_z`,
986 * `place_center_x`: Placement of this decoration is centered along the X axis.
987 * `place_center_y`: Placement of this decoration is centered along the Y axis.
988 * `place_center_z`: Placement of this decoration is centered along the Z axis.
989 * `force_placement`: Schematic nodes other than "ignore" will replace existing nodes.
994 The position field is used for all element types.
996 To account for differing resolutions, the position coordinates are the percentage
997 of the screen, ranging in value from `0` to `1`.
999 The name field is not yet used, but should contain a description of what the
1000 HUD element represents. The direction field is the direction in which something
1003 `0` draws from left to right, `1` draws from right to left, `2` draws from
1004 top to bottom, and `3` draws from bottom to top.
1006 The `alignment` field specifies how the item will be aligned. It ranges from `-1` to `1`,
1007 with `0` being the center, `-1` is moved to the left/up, and `1` is to the right/down.
1008 Fractional values can be used.
1010 The `offset` field specifies a pixel offset from the position. Contrary to position,
1011 the offset is not scaled to screen size. This allows for some precisely-positioned
1014 **Note**: `offset` _will_ adapt to screen DPI as well as user defined scaling factor!
1016 Below are the specific uses for fields in each type; fields not listed for that type are ignored.
1018 **Note**: Future revisions to the HUD API may be incompatible; the HUD API is still
1019 in the experimental stages.
1022 Displays an image on the HUD.
1024 * `scale`: The scale of the image, with 1 being the original texture size.
1025 Only the X coordinate scale is used (positive values).
1026 Negative values represent that percentage of the screen it
1027 should take; e.g. `x=-100` means 100% (width).
1028 * `text`: The name of the texture that is displayed.
1029 * `alignment`: The alignment of the image.
1030 * `offset`: offset in pixels from position.
1033 Displays text on the HUD.
1035 * `scale`: Defines the bounding rectangle of the text.
1036 A value such as `{x=100, y=100}` should work.
1037 * `text`: The text to be displayed in the HUD element.
1038 * `number`: An integer containing the RGB value of the color used to draw the text.
1039 Specify `0xFFFFFF` for white text, `0xFF0000` for red, and so on.
1040 * `alignment`: The alignment of the text.
1041 * `offset`: offset in pixels from position.
1044 Displays a horizontal bar made up of half-images.
1046 * `text`: The name of the texture that is used.
1047 * `number`: The number of half-textures that are displayed.
1048 If odd, will end with a vertically center-split texture.
1050 * `offset`: offset in pixels from position.
1051 * `size`: If used, will force full-image size to this value (override texture pack image size)
1054 * `text`: The name of the inventory list to be displayed.
1055 * `number`: Number of items in the inventory to be displayed.
1056 * `item`: Position of item that is selected.
1058 * `offset`: offset in pixels from position.
1061 Displays distance to selected world position.
1063 * `name`: The name of the waypoint.
1064 * `text`: Distance suffix. Can be blank.
1065 * `number:` An integer containing the RGB value of the color used to draw the text.
1066 * `world_pos`: World position of the waypoint.
1068 Representations of simple things
1069 --------------------------------
1073 {x=num, y=num, z=num}
1075 For helper functions see "Vector helpers".
1078 * `{type="nothing"}`
1079 * `{type="node", under=pos, above=pos}`
1080 * `{type="object", ref=ObjectRef}`
1082 Flag Specifier Format
1083 ---------------------
1084 Flags using the standardized flag specifier format can be specified in either of
1085 two ways, by string or table.
1087 The string format is a comma-delimited set of flag names; whitespace and
1088 unrecognized flag fields are ignored. Specifying a flag in the string sets the
1089 flag, and specifying a flag prefixed by the string `"no"` explicitly
1090 clears the flag from whatever the default may be.
1092 In addition to the standard string flag format, the schematic flags field can
1093 also be a table of flag names to boolean values representing whether or not the
1094 flag is set. Additionally, if a field with the flag name prefixed with `"no"`
1095 is present, mapped to a boolean of any value, the specified flag is unset.
1097 E.g. A flag field of value
1099 {place_center_x = true, place_center_y=false, place_center_z=true}
1103 {place_center_x = true, noplace_center_y=true, place_center_z=true}
1105 which is equivalent to
1107 "place_center_x, noplace_center_y, place_center_z"
1111 "place_center_x, place_center_z"
1113 since, by default, no schematic attributes are set.
1119 There are three kinds of items: nodes, tools and craftitems.
1121 * Node (`register_node`): A node from the world.
1122 * Tool (`register_tool`): A tool/weapon that can dig and damage
1123 things according to `tool_capabilities`.
1124 * Craftitem (`register_craftitem`): A miscellaneous item.
1127 Items and item stacks can exist in three formats: Serializes, table format
1131 This is called "stackstring" or "itemstring":
1133 * e.g. `'default:dirt 5'`
1134 * e.g. `'default:pick_wood 21323'`
1135 * e.g. `'default:apple'`
1142 {name="default:dirt", count=5, wear=0, metadata=""}
1144 A wooden pick about 1/3 worn out:
1146 {name="default:pick_wood", count=1, wear=21323, metadata=""}
1150 {name="default:apple", count=1, wear=0, metadata=""}
1153 A native C++ format with many helper methods. Useful for converting
1154 between formats. See the Class reference section for details.
1156 When an item must be passed to a function, it can usually be in any of
1162 In a number of places, there is a group table. Groups define the
1163 properties of a thing (item, node, armor of entity, capabilities of
1164 tool) in such a way that the engine and other mods can can interact with
1165 the thing without actually knowing what the thing is.
1168 Groups are stored in a table, having the group names with keys and the
1169 group ratings as values. For example:
1171 groups = {crumbly=3, soil=1}
1174 groups = {crumbly=2, soil=1, level=2, outerspace=1}
1175 -- ^ A more special dirt-kind of thing
1177 Groups always have a rating associated with them. If there is no
1178 useful meaning for a rating for an enabled group, it shall be `1`.
1180 When not defined, the rating of a group defaults to `0`. Thus when you
1181 read groups, you must interpret `nil` and `0` as the same value, `0`.
1183 You can read the rating of a group for an item or a node by using
1185 minetest.get_item_group(itemname, groupname)
1188 Groups of items can define what kind of an item it is (e.g. wool).
1191 In addition to the general item things, groups are used to define whether
1192 a node is destroyable and how long it takes to destroy by a tool.
1194 ### Groups of entities
1195 For entities, groups are, as of now, used only for calculating damage.
1196 The rating is the percentage of damage caused by tools with this damage group.
1197 See "Entity damage mechanism".
1199 object.get_armor_groups() --> a group-rating table (e.g. {fleshy=100})
1200 object.set_armor_groups({fleshy=30, cracky=80})
1203 Groups in tools define which groups of nodes and entities they are
1206 ### Groups in crafting recipes
1207 An example: Make meat soup from any meat, any water and any bowl:
1210 output = 'food:meat_soup_raw',
1216 -- preserve = {'group:bowl'}, -- Not implemented yet (TODO)
1219 Another example: Make red wool from white wool and red dye:
1223 output = 'wool:red',
1224 recipe = {'wool:white', 'group:dye,basecolor_red'},
1228 * `immortal`: Disables the group damage system for an entity
1229 * `level`: Can be used to give an additional sense of progression in the game.
1230 * A larger level will cause e.g. a weapon of a lower level make much less
1231 damage, and get worn out much faster, or not be able to get drops
1232 from destroyed nodes.
1233 * `0` is something that is directly accessible at the start of gameplay
1234 * There is no upper limit
1235 * `dig_immediate`: (player can always pick up node without reducing tool wear)
1236 * `2`: the node always gets the digging time 0.5 seconds (rail, sign)
1237 * `3`: the node always gets the digging time 0 seconds (torch)
1238 * `disable_jump`: Player (and possibly other things) cannot jump from node
1239 * `fall_damage_add_percent`: damage speed = `speed * (1 + value/100)`
1240 * `bouncy`: value is bounce speed in percent
1241 * `falling_node`: if there is no walkable block under the node it will fall
1242 * `attached_node`: if the node under it is not a walkable block the node will be
1243 dropped as an item. If the node is wallmounted the wallmounted direction is
1245 * `soil`: saplings will grow on nodes in this group
1246 * `connect_to_raillike`: makes nodes of raillike drawtype with same group value
1247 connect to each other
1249 ### Known damage and digging time defining groups
1250 * `crumbly`: dirt, sand
1251 * `cracky`: tough but crackable stuff like stone.
1252 * `snappy`: something that can be cut using fine tools; e.g. leaves, small
1253 plants, wire, sheets of metal
1254 * `choppy`: something that can be cut using force; e.g. trees, wooden planks
1255 * `fleshy`: Living things like animals and the player. This could imply
1256 some blood effects when hitting.
1257 * `explody`: Especially prone to explosions
1258 * `oddly_breakable_by_hand`:
1259 Can be added to nodes that shouldn't logically be breakable by the
1260 hand but are. Somewhat similar to `dig_immediate`, but times are more
1261 like `{[1]=3.50,[2]=2.00,[3]=0.70}` and this does not override the
1262 speed of a tool if the tool can dig at a faster speed than this
1263 suggests for the hand.
1265 ### Examples of custom groups
1266 Item groups are often used for defining, well, _groups of items_.
1267 * `meat`: any meat-kind of a thing (rating might define the size or healing
1268 ability or be irrelevant -- it is not defined as of yet)
1269 * `eatable`: anything that can be eaten. Rating might define HP gain in half
1271 * `flammable`: can be set on fire. Rating might define the intensity of the
1272 fire, affecting e.g. the speed of the spreading of an open fire.
1273 * `wool`: any wool (any origin, any color)
1274 * `metal`: any metal
1275 * `weapon`: any weapon
1276 * `heavy`: anything considerably heavy
1278 ### Digging time calculation specifics
1279 Groups such as `crumbly`, `cracky` and `snappy` are used for this
1280 purpose. Rating is `1`, `2` or `3`. A higher rating for such a group implies
1281 faster digging time.
1283 The `level` group is used to limit the toughness of nodes a tool can dig
1284 and to scale the digging times / damage to a greater extent.
1286 **Please do understand this**, otherwise you cannot use the system to it's
1289 Tools define their properties by a list of parameters for groups. They
1290 cannot dig other groups; thus it is important to use a standard bunch of
1291 groups to enable interaction with tools.
1293 #### Tools definition
1296 * Full punch interval
1297 * Maximum drop level
1298 * For an arbitrary list of groups:
1299 * Uses (until the tool breaks)
1300 * Maximum level (usually `0`, `1`, `2` or `3`)
1304 #### Full punch interval
1305 When used as a weapon, the tool will do full damage if this time is spent
1306 between punches. If e.g. half the time is spent, the tool will do half
1309 #### Maximum drop level
1310 Suggests the maximum level of node, when dug with the tool, that will drop
1311 it's useful item. (e.g. iron ore to drop a lump of iron).
1313 This is not automated; it is the responsibility of the node definition
1317 Determines how many uses the tool has when it is used for digging a node,
1318 of this group, of the maximum level. For lower leveled nodes, the use count
1319 is multiplied by `3^leveldiff`.
1321 * `uses=10, leveldiff=0`: actual uses: 10
1322 * `uses=10, leveldiff=1`: actual uses: 30
1323 * `uses=10, leveldiff=2`: actual uses: 90
1326 Tells what is the maximum level of a node of this group that the tool will
1330 List of digging times for different ratings of the group, for nodes of the
1333 For example, as a Lua table, `times={2=2.00, 3=0.70}`. This would
1334 result in the tool to be able to dig nodes that have a rating of `2` or `3`
1335 for this group, and unable to dig the rating `1`, which is the toughest.
1336 Unless there is a matching group that enables digging otherwise.
1338 If the result digging time is 0, a delay of 0.15 seconds is added between
1339 digging nodes; If the player releases LMB after digging, this delay is set to 0,
1340 i.e. players can more quickly click the nodes away instead of holding LMB.
1343 List of damage for groups of entities. See "Entity damage mechanism".
1345 #### Example definition of the capabilities of a tool
1347 tool_capabilities = {
1348 full_punch_interval=1.5,
1351 crumbly={maxlevel=2, uses=20, times={[1]=1.60, [2]=1.20, [3]=0.80}}
1353 damage_groups = {fleshy=2},
1356 This makes the tool be able to dig nodes that fulfil both of these:
1358 * Have the `crumbly` group
1359 * Have a `level` group less or equal to `2`
1361 Table of resulting digging times:
1363 crumbly 0 1 2 3 4 <- level
1365 1 0.80 1.60 1.60 - -
1366 2 0.60 1.20 1.20 - -
1367 3 0.40 0.80 0.80 - -
1369 level diff: 2 1 0 -1 -2
1371 Table of resulting tool uses:
1380 * At `crumbly==0`, the node is not diggable.
1381 * At `crumbly==3`, the level difference digging time divider kicks in and makes
1382 easy nodes to be quickly breakable.
1383 * At `level > 2`, the node is not diggable, because it's `level > maxlevel`
1385 Entity damage mechanism
1386 -----------------------
1390 foreach group in cap.damage_groups:
1391 damage += cap.damage_groups[group] * limit(actual_interval /
1392 cap.full_punch_interval, 0.0, 1.0)
1393 * (object.armor_groups[group] / 100.0)
1394 -- Where object.armor_groups[group] is 0 for inexistent values
1397 Client predicts damage based on damage groups. Because of this, it is able to
1398 give an immediate response when an entity is damaged or dies; the response is
1399 pre-defined somehow (e.g. by defining a sprite animation) (not implemented;
1401 Currently a smoke puff will appear when an entity dies.
1403 The group `immortal` completely disables normal damage.
1405 Entities can define a special armor group, which is `punch_operable`. This
1406 group disables the regular damage mechanism for players punching it by hand or
1407 a non-tool item, so that it can do something else than take damage.
1409 On the Lua side, every punch calls:
1411 entity:on_punch(puncher, time_from_last_punch, tool_capabilities, direction, damage)
1413 This should never be called directly, because damage is usually not handled by
1416 * `puncher` is the object performing the punch. Can be `nil`. Should never be
1417 accessed unless absolutely required, to encourage interoperability.
1418 * `time_from_last_punch` is time from last punch (by `puncher`) or `nil`.
1419 * `tool_capabilities` can be `nil`.
1420 * `direction` is a unit vector, pointing from the source of the punch to
1422 * `damage` damage that will be done to entity
1423 Return value of this function will determin if damage is done by this function
1424 (retval true) or shall be done by engine (retval false)
1426 To punch an entity/object in Lua, call:
1428 object:punch(puncher, time_from_last_punch, tool_capabilities, direction)
1430 * Return value is tool wear.
1431 * Parameters are equal to the above callback.
1432 * If `direction` equals `nil` and `puncher` does not equal `nil`,
1433 `direction` will be automatically filled in based on the location of `puncher`.
1437 The instance of a node in the world normally only contains the three values
1438 mentioned in "Nodes". However, it is possible to insert extra data into a
1439 node. It is called "node metadata"; See `NodeMetaRef`.
1441 Node metadata contains two things:
1446 Some of the values in the key-value store are handled specially:
1448 * `formspec`: Defines a right-click inventory menu. See "Formspec".
1449 * `infotext`: Text shown on the screen when the node is pointed at
1453 local meta = minetest.get_meta(pos)
1454 meta:set_string("formspec",
1456 "list[context;main;0,0;8,4;]"..
1457 "list[current_player;main;0,5;8,4;]")
1458 meta:set_string("infotext", "Chest");
1459 local inv = meta:get_inventory()
1460 inv:set_size("main", 8*4)
1461 print(dump(meta:to_table()))
1464 main = {[1] = "default:dirt", [2] = "", [3] = "", [4] = "",
1465 [5] = "", [6] = "", [7] = "", [8] = "", [9] = "",
1466 [10] = "", [11] = "", [12] = "", [13] = "",
1467 [14] = "default:cobble", [15] = "", [16] = "", [17] = "",
1468 [18] = "", [19] = "", [20] = "default:cobble", [21] = "",
1469 [22] = "", [23] = "", [24] = "", [25] = "", [26] = "",
1470 [27] = "", [28] = "", [29] = "", [30] = "", [31] = "",
1474 formspec = "size[8,9]list[context;main;0,0;8,4;]list[current_player;main;0,5;8,4;]",
1481 Item stacks can store metadata too. See `ItemStackMetaRef`.
1483 Item metadata only contains a key-value store.
1485 Some of the values in the key-value store are handled specially:
1487 * `description`: Set the itemstack's description. Defaults to idef.description
1488 * `color`: A `ColorString`, which sets the stack's color.
1489 * `palette_index`: If the item has a palette, this is used to get the
1490 current color from the palette.
1494 local meta = stack:get_meta()
1495 meta:set_string("key", "value")
1496 print(dump(meta:to_table()))
1500 Formspec defines a menu. Currently not much else than inventories are
1501 supported. It is a string, with a somewhat strange format.
1503 Spaces and newlines can be inserted between the blocks, as is used in the
1511 list[context;main;0,0;8,4;]
1512 list[current_player;main;0,5;8,4;]
1517 list[context;fuel;2,3;1,1;]
1518 list[context;src;2,1;1,1;]
1519 list[context;dst;5,1;2,2;]
1520 list[current_player;main;0,5;8,4;]
1522 #### Minecraft-like player inventory
1525 image[1,0.6;1,2;player.png]
1526 list[current_player;main;0,3.5;8,4;]
1527 list[current_player;craft;3,0;3,3;]
1528 list[current_player;craftpreview;7,1;1,1;]
1532 #### `size[<W>,<H>,<fixed_size>]`
1533 * Define the size of the menu in inventory slots
1534 * `fixed_size`: `true`/`false` (optional)
1535 * deprecated: `invsize[<W>,<H>;]`
1537 #### `position[<X>,<Y>]`
1538 * Define the position of the formspec
1539 * A value between 0.0 and 1.0 represents a position inside the screen
1540 * The default value is the center of the screen (0.5, 0.5)
1542 #### `anchor[<X>,<Y>]`
1543 * Define the anchor of the formspec
1544 * A value between 0.0 and 1.0 represents an anchor inside the formspec
1545 * The default value is the center of the formspec (0.5, 0.5)
1547 #### `container[<X>,<Y>]`
1548 * Start of a container block, moves all physical elements in the container by (X, Y)
1549 * Must have matching container_end
1550 * Containers can be nested, in which case the offsets are added
1551 (child containers are relative to parent containers)
1553 #### `container_end[]`
1554 * End of a container, following elements are no longer relative to this container
1556 #### `list[<inventory location>;<list name>;<X>,<Y>;<W>,<H>;]`
1557 * Show an inventory list
1559 #### `list[<inventory location>;<list name>;<X>,<Y>;<W>,<H>;<starting item index>]`
1560 * Show an inventory list
1562 #### `listring[<inventory location>;<list name>]`
1563 * Allows to create a ring of inventory lists
1564 * Shift-clicking on items in one element of the ring
1565 will send them to the next inventory list inside the ring
1566 * The first occurrence of an element inside the ring will
1567 determine the inventory where items will be sent to
1570 * Shorthand for doing `listring[<inventory location>;<list name>]`
1571 for the last two inventory lists added by list[...]
1573 #### `listcolors[<slot_bg_normal>;<slot_bg_hover>]`
1574 * Sets background color of slots as `ColorString`
1575 * Sets background color of slots on mouse hovering
1577 #### `listcolors[<slot_bg_normal>;<slot_bg_hover>;<slot_border>]`
1578 * Sets background color of slots as `ColorString`
1579 * Sets background color of slots on mouse hovering
1580 * Sets color of slots border
1582 #### `listcolors[<slot_bg_normal>;<slot_bg_hover>;<slot_border>;<tooltip_bgcolor>;<tooltip_fontcolor>]`
1583 * Sets background color of slots as `ColorString`
1584 * Sets background color of slots on mouse hovering
1585 * Sets color of slots border
1586 * Sets default background color of tooltips
1587 * Sets default font color of tooltips
1589 #### `tooltip[<gui_element_name>;<tooltip_text>;<bgcolor>;<fontcolor>]`
1590 * Adds tooltip for an element
1591 * `<bgcolor>` tooltip background color as `ColorString` (optional)
1592 * `<fontcolor>` tooltip font color as `ColorString` (optional)
1594 #### `image[<X>,<Y>;<W>,<H>;<texture name>]`
1596 * Position and size units are inventory slots
1598 #### `item_image[<X>,<Y>;<W>,<H>;<item name>]`
1599 * Show an inventory image of registered item/node
1600 * Position and size units are inventory slots
1602 #### `bgcolor[<color>;<fullscreen>]`
1603 * Sets background color of formspec as `ColorString`
1604 * If `true`, the background color is drawn fullscreen (does not effect the size of the formspec)
1606 #### `background[<X>,<Y>;<W>,<H>;<texture name>]`
1607 * Use a background. Inventory rectangles are not drawn then.
1608 * Position and size units are inventory slots
1609 * Example for formspec 8x4 in 16x resolution: image shall be sized
1610 8 times 16px times 4 times 16px.
1612 #### `background[<X>,<Y>;<W>,<H>;<texture name>;<auto_clip>]`
1613 * Use a background. Inventory rectangles are not drawn then.
1614 * Position and size units are inventory slots
1615 * Example for formspec 8x4 in 16x resolution:
1616 image shall be sized 8 times 16px times 4 times 16px
1617 * If `true` the background is clipped to formspec size
1618 (`x` and `y` are used as offset values, `w` and `h` are ignored)
1620 #### `pwdfield[<X>,<Y>;<W>,<H>;<name>;<label>]`
1621 * Textual password style field; will be sent to server when a button is clicked
1622 * When enter is pressed in field, fields.key_enter_field will be sent with the name
1624 * `x` and `y` position the field relative to the top left of the menu
1625 * `w` and `h` are the size of the field
1626 * Fields are a set height, but will be vertically centred on `h`
1627 * Position and size units are inventory slots
1628 * `name` is the name of the field as returned in fields to `on_receive_fields`
1629 * `label`, if not blank, will be text printed on the top left above the field
1630 * See field_close_on_enter to stop enter closing the formspec
1632 #### `field[<X>,<Y>;<W>,<H>;<name>;<label>;<default>]`
1633 * Textual field; will be sent to server when a button is clicked
1634 * When enter is pressed in field, fields.key_enter_field will be sent with the name
1636 * `x` and `y` position the field relative to the top left of the menu
1637 * `w` and `h` are the size of the field
1638 * Fields are a set height, but will be vertically centred on `h`
1639 * Position and size units are inventory slots
1640 * `name` is the name of the field as returned in fields to `on_receive_fields`
1641 * `label`, if not blank, will be text printed on the top left above the field
1642 * `default` is the default value of the field
1643 * `default` may contain variable references such as `${text}'` which
1644 will fill the value from the metadata value `text`
1645 * **Note**: no extra text or more than a single variable is supported ATM.
1646 * See field_close_on_enter to stop enter closing the formspec
1648 #### `field[<name>;<label>;<default>]`
1649 * As above, but without position/size units
1650 * When enter is pressed in field, fields.key_enter_field will be sent with the name
1652 * Special field for creating simple forms, such as sign text input
1653 * Must be used without a `size[]` element
1654 * A "Proceed" button will be added automatically
1655 * See field_close_on_enter to stop enter closing the formspec
1657 #### `field_close_on_enter[<name>;<close_on_enter>]`
1658 * <name> is the name of the field
1659 * if <close_on_enter> is false, pressing enter in the field will submit the form but not close it
1660 * defaults to true when not specified (ie: no tag for a field)
1662 #### `textarea[<X>,<Y>;<W>,<H>;<name>;<label>;<default>]`
1663 * Same as fields above, but with multi-line input
1665 #### `label[<X>,<Y>;<label>]`
1666 * `x` and `y` work as per field
1667 * `label` is the text on the label
1668 * Position and size units are inventory slots
1670 #### `vertlabel[<X>,<Y>;<label>]`
1671 * Textual label drawn vertically
1672 * `x` and `y` work as per field
1673 * `label` is the text on the label
1674 * Position and size units are inventory slots
1676 #### `button[<X>,<Y>;<W>,<H>;<name>;<label>]`
1677 * Clickable button. When clicked, fields will be sent.
1678 * `x`, `y` and `name` work as per field
1679 * `w` and `h` are the size of the button
1680 * `label` is the text on the button
1681 * Position and size units are inventory slots
1683 #### `image_button[<X>,<Y>;<W>,<H>;<texture name>;<name>;<label>]`
1684 * `x`, `y`, `w`, `h`, and `name` work as per button
1685 * `texture name` is the filename of an image
1686 * Position and size units are inventory slots
1688 #### `image_button[<X>,<Y>;<W>,<H>;<texture name>;<name>;<label>;<noclip>;<drawborder>;<pressed texture name>]`
1689 * `x`, `y`, `w`, `h`, and `name` work as per button
1690 * `texture name` is the filename of an image
1691 * Position and size units are inventory slots
1692 * `noclip=true` means the image button doesn't need to be within specified formsize
1693 * `drawborder`: draw button border or not
1694 * `pressed texture name` is the filename of an image on pressed state
1696 #### `item_image_button[<X>,<Y>;<W>,<H>;<item name>;<name>;<label>]`
1697 * `x`, `y`, `w`, `h`, `name` and `label` work as per button
1698 * `item name` is the registered name of an item/node,
1699 tooltip will be made out of its description
1700 to override it use tooltip element
1701 * Position and size units are inventory slots
1703 #### `button_exit[<X>,<Y>;<W>,<H>;<name>;<label>]`
1704 * When clicked, fields will be sent and the form will quit.
1706 #### `image_button_exit[<X>,<Y>;<W>,<H>;<texture name>;<name>;<label>]`
1707 * When clicked, fields will be sent and the form will quit.
1709 #### `textlist[<X>,<Y>;<W>,<H>;<name>;<listelem 1>,<listelem 2>,...,<listelem n>]`
1710 * Scrollable item list showing arbitrary text elements
1711 * `x` and `y` position the itemlist relative to the top left of the menu
1712 * `w` and `h` are the size of the itemlist
1713 * `name` fieldname sent to server on doubleclick value is current selected element
1714 * `listelements` can be prepended by #color in hexadecimal format RRGGBB (only),
1715 * if you want a listelement to start with "#" write "##".
1717 #### `textlist[<X>,<Y>;<W>,<H>;<name>;<listelem 1>,<listelem 2>,...,<listelem n>;<selected idx>;<transparent>]`
1718 * Scrollable itemlist showing arbitrary text elements
1719 * `x` and `y` position the item list relative to the top left of the menu
1720 * `w` and `h` are the size of the item list
1721 * `name` fieldname sent to server on doubleclick value is current selected element
1722 * `listelements` can be prepended by #RRGGBB (only) in hexadecimal format
1723 * if you want a listelement to start with "#" write "##"
1724 * Index to be selected within textlist
1725 * `true`/`false`: draw transparent background
1726 * See also `minetest.explode_textlist_event` (main menu: `engine.explode_textlist_event`)
1728 #### `tabheader[<X>,<Y>;<name>;<caption 1>,<caption 2>,...,<caption n>;<current_tab>;<transparent>;<draw_border>]`
1729 * Show a tab**header** at specific position (ignores formsize)
1730 * `x` and `y` position the itemlist relative to the top left of the menu
1731 * `name` fieldname data is transferred to Lua
1732 * `caption 1`...: name shown on top of tab
1733 * `current_tab`: index of selected tab 1...
1734 * `transparent` (optional): show transparent
1735 * `draw_border` (optional): draw border
1737 #### `box[<X>,<Y>;<W>,<H>;<color>]`
1738 * Simple colored semitransparent box
1739 * `x` and `y` position the box relative to the top left of the menu
1740 * `w` and `h` are the size of box
1741 * `color` is color specified as a `ColorString`
1743 #### `dropdown[<X>,<Y>;<W>;<name>;<item 1>,<item 2>, ...,<item n>;<selected idx>]`
1744 * Show a dropdown field
1745 * **Important note**: There are two different operation modes:
1746 1. handle directly on change (only changed dropdown is submitted)
1747 2. read the value on pressing a button (all dropdown values are available)
1748 * `x` and `y` position of dropdown
1750 * Fieldname data is transferred to Lua
1751 * Items to be shown in dropdown
1752 * Index of currently selected dropdown item
1754 #### `checkbox[<X>,<Y>;<name>;<label>;<selected>]`
1756 * `x` and `y`: position of checkbox
1757 * `name` fieldname data is transferred to Lua
1758 * `label` to be shown left of checkbox
1759 * `selected` (optional): `true`/`false`
1761 #### `scrollbar[<X>,<Y>;<W>,<H>;<orientation>;<name>;<value>]`
1763 * There are two ways to use it:
1764 1. handle the changed event (only changed scrollbar is available)
1765 2. read the value on pressing a button (all scrollbars are available)
1766 * `x` and `y`: position of trackbar
1767 * `w` and `h`: width and height
1768 * `orientation`: `vertical`/`horizontal`
1769 * Fieldname data is transferred to Lua
1770 * Value this trackbar is set to (`0`-`1000`)
1771 * See also `minetest.explode_scrollbar_event` (main menu: `engine.explode_scrollbar_event`)
1773 #### `table[<X>,<Y>;<W>,<H>;<name>;<cell 1>,<cell 2>,...,<cell n>;<selected idx>]`
1774 * Show scrollable table using options defined by the previous `tableoptions[]`
1775 * Displays cells as defined by the previous `tablecolumns[]`
1776 * `x` and `y`: position the itemlist relative to the top left of the menu
1777 * `w` and `h` are the size of the itemlist
1778 * `name`: fieldname sent to server on row select or doubleclick
1779 * `cell 1`...`cell n`: cell contents given in row-major order
1780 * `selected idx`: index of row to be selected within table (first row = `1`)
1781 * See also `minetest.explode_table_event` (main menu: `engine.explode_table_event`)
1783 #### `tableoptions[<opt 1>;<opt 2>;...]`
1784 * Sets options for `table[]`
1786 * default text color (`ColorString`), defaults to `#FFFFFF`
1787 * `background=#RRGGBB`
1788 * table background color (`ColorString`), defaults to `#000000`
1789 * `border=<true/false>`
1790 * should the table be drawn with a border? (default: `true`)
1791 * `highlight=#RRGGBB`
1792 * highlight background color (`ColorString`), defaults to `#466432`
1793 * `highlight_text=#RRGGBB`
1794 * highlight text color (`ColorString`), defaults to `#FFFFFF`
1795 * `opendepth=<value>`
1796 * all subtrees up to `depth < value` are open (default value = `0`)
1797 * only useful when there is a column of type "tree"
1799 #### `tablecolumns[<type 1>,<opt 1a>,<opt 1b>,...;<type 2>,<opt 2a>,<opt 2b>;...]`
1800 * Sets columns for `table[]`
1801 * Types: `text`, `image`, `color`, `indent`, `tree`
1802 * `text`: show cell contents as text
1803 * `image`: cell contents are an image index, use column options to define images
1804 * `color`: cell contents are a ColorString and define color of following cell
1805 * `indent`: cell contents are a number and define indentation of following cell
1806 * `tree`: same as indent, but user can open and close subtrees (treeview-like)
1809 * for `text` and `image`: content alignment within cells.
1810 Available values: `left` (default), `center`, `right`, `inline`
1812 * for `text` and `image`: minimum width in em (default: `0`)
1813 * for `indent` and `tree`: indent width in em (default: `1.5`)
1814 * `padding=<value>`: padding left of the column, in em (default `0.5`).
1815 Exception: defaults to 0 for indent columns
1816 * `tooltip=<value>`: tooltip text (default: empty)
1817 * `image` column options:
1818 * `0=<value>` sets image for image index 0
1819 * `1=<value>` sets image for image index 1
1820 * `2=<value>` sets image for image index 2
1821 * and so on; defined indices need not be contiguous empty or
1822 non-numeric cells are treated as `0`.
1823 * `color` column options:
1824 * `span=<value>`: number of following columns to affect (default: infinite)
1826 **Note**: do _not_ use a element name starting with `key_`; those names are reserved to
1827 pass key press events to formspec!
1831 * `"context"`: Selected node metadata (deprecated: `"current_name"`)
1832 * `"current_player"`: Player to whom the menu is shown
1833 * `"player:<name>"`: Any player
1834 * `"nodemeta:<X>,<Y>,<Z>"`: Any node metadata
1835 * `"detached:<name>"`: A detached inventory
1837 Player Inventory lists
1838 ----------------------
1839 * `main`: list containing the default inventory
1840 * `craft`: list containing the craft input
1841 * `craftpreview`: list containing the craft output
1842 * `hand`: list containing an override for the empty hand
1846 `#RGB` defines a color in hexadecimal format.
1848 `#RGBA` defines a color in hexadecimal format and alpha channel.
1850 `#RRGGBB` defines a color in hexadecimal format.
1852 `#RRGGBBAA` defines a color in hexadecimal format and alpha channel.
1854 Named colors are also supported and are equivalent to
1855 [CSS Color Module Level 4](http://dev.w3.org/csswg/css-color/#named-colors).
1856 To specify the value of the alpha channel, append `#AA` to the end of the color name
1857 (e.g. `colorname#08`). For named colors the hexadecimal string representing the alpha
1858 value must (always) be two hexadecimal digits.
1862 A ColorSpec specifies a 32-bit color. It can be written in either:
1863 table form, each element ranging from 0..255 (a, if absent, defaults to 255):
1864 `colorspec = {a=255, r=0, g=255, b=0}`
1865 numerical form, the raw integer value of an ARGB8 quad:
1866 `colorspec = 0xFF00FF00`
1867 or string form, a ColorString (defined above):
1868 `colorspec = "green"`
1872 Most text can contain escape sequences, that can for example color the text.
1873 There are a few exceptions: tab headers, dropdowns and vertical labels can't.
1874 The following functions provide escape sequences:
1875 * `core.get_color_escape_sequence(color)`:
1876 * `color` is a ColorString
1877 * The escape sequence sets the text color to `color`
1878 * `core.colorize(color, message)`:
1880 `core.get_color_escape_sequence(color) ..
1882 core.get_color_escape_sequence("#ffffff")`
1883 * `color.get_background_escape_sequence(color)`
1884 * `color` is a ColorString
1885 * The escape sequence sets the background of the whole text element to
1886 `color`. Only defined for item descriptions and tooltips.
1887 * `color.strip_foreground_colors(str)`
1888 * Removes foreground colors added by `get_color_escape_sequence`.
1889 * `color.strip_background_colors(str)`
1890 * Removes background colors added by `get_background_escape_sequence`.
1891 * `color.strip_colors(str)`
1892 * Removes all color escape sequences.
1896 * `vector.new(a[, b, c])`: returns a vector:
1897 * A copy of `a` if `a` is a vector.
1898 * `{x = a, y = b, z = c}`, if all `a, b, c` are defined
1899 * `vector.direction(p1, p2)`: returns a vector
1900 * `vector.distance(p1, p2)`: returns a number
1901 * `vector.length(v)`: returns a number
1902 * `vector.normalize(v)`: returns a vector
1903 * `vector.floor(v)`: returns a vector, each dimension rounded down
1904 * `vector.round(v)`: returns a vector, each dimension rounded to nearest int
1905 * `vector.apply(v, func)`: returns a vector
1906 * `vector.equals(v1, v2)`: returns a boolean
1907 * `vector.sort(v1, v2)`: returns minp, maxp vectors of the cuboid defined by v1 and v2
1909 For the following functions `x` can be either a vector or a number:
1911 * `vector.add(v, x)`: returns a vector
1912 * `vector.subtract(v, x)`: returns a vector
1913 * `vector.multiply(v, x)`: returns a scaled vector or Schur product
1914 * `vector.divide(v, x)`: returns a scaled vector or Schur quotient
1918 * `dump2(obj, name="_", dumped={})`
1919 * Return object serialized as a string, handles reference loops
1920 * `dump(obj, dumped={})`
1921 * Return object serialized as a string
1922 * `math.hypot(x, y)`
1923 * Get the hypotenuse of a triangle with legs x and y.
1924 Useful for distance calculation.
1925 * `math.sign(x, tolerance)`
1926 * Get the sign of a number.
1927 Optional: Also returns `0` when the absolute value is within the tolerance (default: `0`)
1928 * `string.split(str, separator=",", include_empty=false, max_splits=-1, sep_is_pattern=false)`
1929 * If `max_splits` is negative, do not limit splits.
1930 * `sep_is_pattern` specifies if separator is a plain string or a pattern (regex).
1931 * e.g. `string:split("a,b", ",") == {"a","b"}`
1933 * e.g. `string.trim("\n \t\tfoo bar\t ") == "foo bar"`
1934 * `minetest.pos_to_string({x=X,y=Y,z=Z}, decimal_places))`: returns `"(X,Y,Z)"`
1935 * Convert position to a printable string
1936 Optional: 'decimal_places' will round the x, y and z of the pos to the given decimal place.
1937 * `minetest.string_to_pos(string)`: returns a position
1938 * Same but in reverse. Returns `nil` if the string can't be parsed to a position.
1939 * `minetest.string_to_area("(X1, Y1, Z1) (X2, Y2, Z2)")`: returns two positions
1940 * Converts a string representing an area box into two positions
1941 * `minetest.formspec_escape(string)`: returns a string
1942 * escapes the characters "[", "]", "\", "," and ";", which can not be used in formspecs
1943 * `minetest.is_yes(arg)`
1944 * returns true if passed 'y', 'yes', 'true' or a number that isn't zero.
1945 * `minetest.get_us_time()`
1946 * returns time with microsecond precision. May not return wall time.
1947 * `table.copy(table)`: returns a table
1948 * returns a deep copy of `table`
1949 * `minetest.pointed_thing_to_face_pos(placer, pointed_thing)`: returns a position
1950 * returns the exact position on the surface of a pointed node
1952 `minetest` namespace reference
1953 ------------------------------
1957 * `minetest.get_current_modname()`: returns the currently loading mod's name, when we are loading a mod
1958 * `minetest.get_modpath(modname)`: returns e.g. `"/home/user/.minetest/usermods/modname"`
1959 * Useful for loading additional `.lua` modules or static data from mod
1960 * `minetest.get_modnames()`: returns a list of installed mods
1961 * Return a list of installed mods, sorted alphabetically
1962 * `minetest.get_worldpath()`: returns e.g. `"/home/user/.minetest/world"`
1963 * Useful for storing custom data
1964 * `minetest.is_singleplayer()`
1965 * `minetest.features`: Table containing API feature flags
1967 glasslike_framed = true,
1968 nodebox_as_selectionbox = true,
1969 chat_send_player_param3 = true,
1970 get_all_craft_recipes_works = true,
1971 use_texture_alpha = true,
1972 -- ^ The transparency channel of textures can be used optionally
1973 no_legacy_abms = true,
1974 -- ^ Tree and grass ABMs are no longer done from C++
1975 texture_names_parens = true,
1976 -- ^ Texture grouping is possible using parentheses
1977 area_store_custom_ids = true,
1978 -- ^ Unique Area ID for AreaStore:insert_area
1979 add_entity_with_staticdata = true,
1980 -- ^ add_entity supports passing initial staticdata to on_activate
1981 no_chat_message_prediction = true,
1982 -- ^ Chat messages are no longer predicted
1984 * `minetest.has_feature(arg)`: returns `boolean, missing_features`
1985 * `arg`: string or table in format `{foo=true, bar=true}`
1986 * `missing_features`: `{foo=true, bar=true}`
1987 * `minetest.get_player_information(player_name)`:
1988 * Returns a table containing information about a player
1989 Example return value:
1991 address = "127.0.0.1", -- IP address of client
1992 ip_version = 4, -- IPv4 / IPv6
1993 min_rtt = 0.01, -- minimum round trip time
1994 max_rtt = 0.2, -- maximum round trip time
1995 avg_rtt = 0.02, -- average round trip time
1996 min_jitter = 0.01, -- minimum packet time jitter
1997 max_jitter = 0.5, -- maximum packet time jitter
1998 avg_jitter = 0.03, -- average packet time jitter
1999 connection_uptime = 200, -- seconds since client connected
2000 prot_vers = 31, -- protocol version used by client
2002 -- following information is available on debug build only!!!
2003 -- DO NOT USE IN MODS
2004 --ser_vers = 26, -- serialization version used by client
2005 --major = 0, -- major version number
2006 --minor = 4, -- minor version number
2007 --patch = 10, -- patch version number
2008 --vers_string = "0.4.9-git", -- full version string
2009 --state = "Active" -- current client state
2011 * `minetest.mkdir(path)`: returns success.
2012 * Creates a directory specified by `path`, creating parent directories
2013 if they don't exist.
2014 * `minetest.get_dir_list(path, [is_dir])`: returns list of entry names
2016 * nil: return all entries,
2017 * true: return only subdirectory names, or
2018 * false: return only file names.
2019 * `minetest.get_version()`: returns a table containing components of the
2020 engine version. Components:
2021 * `project`: Name of the project, eg, "Minetest"
2022 * `string`: Simple version, eg, "1.2.3-dev"
2023 * `hash`: Full git version (only set if available), eg, "1.2.3-dev-01234567-dirty"
2024 Use this for informational purposes only. The information in the returned
2025 table does not represent the capabilities of the engine, nor is it
2026 reliable or verifyable. Compatible forks will have a different name and
2027 version entirely. To check for the presence of engine features, test
2028 whether the functions exported by the wanted features exist. For example:
2029 `if core.nodeupdate then ... end`.
2032 * `minetest.debug(...)`
2033 * Equivalent to `minetest.log(table.concat({...}, "\t"))`
2034 * `minetest.log([level,] text)`
2035 * `level` is one of `"none"`, `"error"`, `"warning"`, `"action"`,
2036 `"info"`, or `"verbose"`. Default is `"none"`.
2038 ### Registration functions
2039 Call these functions only at load time!
2041 * `minetest.register_entity(name, prototype table)`
2042 * `minetest.register_abm(abm definition)`
2043 * `minetest.register_lbm(lbm definition)`
2044 * `minetest.register_node(name, node definition)`
2045 * `minetest.register_tool(name, item definition)`
2046 * `minetest.register_craftitem(name, item definition)`
2047 * `minetest.unregister_item(name)`
2048 * `minetest.register_alias(name, convert_to)`
2049 * `minetest.register_alias_force(name, convert_to)`
2050 * `minetest.register_craft(recipe)`
2051 * Check recipe table syntax for different types below.
2052 * `minetest.clear_craft(recipe)`
2053 * Will erase existing craft based either on output item or on input recipe.
2054 * Specify either output or input only. If you specify both, input will be ignored. For input use the same recipe table
2055 syntax as for `minetest.register_craft(recipe)`. For output specify only the item, without a quantity.
2056 * If no erase candidate could be found, Lua exception will be thrown.
2057 * Warning! The type field ("shaped","cooking" or any other) will be ignored if the recipe
2058 contains output. Erasing is then done independently from the crafting method.
2059 * `minetest.register_ore(ore definition)`
2060 * `minetest.register_biome(biome definition)`
2061 * `minetest.register_decoration(decoration definition)`
2062 * `minetest.override_item(name, redefinition)`
2063 * Overrides fields of an item registered with register_node/tool/craftitem.
2064 * Note: Item must already be defined, (opt)depend on the mod defining it.
2065 * Example: `minetest.override_item("default:mese", {light_source=LIGHT_MAX})`
2066 * `minetest.clear_registered_ores()`
2067 * `minetest.clear_registered_biomes()`
2068 * `minetest.clear_registered_decorations()`
2070 ### Global callback registration functions
2071 Call these functions only at load time!
2073 * `minetest.register_globalstep(func(dtime))`
2074 * Called every server step, usually interval of 0.1s
2075 * `minetest.register_on_shutdown(func())`
2076 * Called before server shutdown
2077 * **Warning**: If the server terminates abnormally (i.e. crashes), the registered
2078 callbacks **will likely not be run**. Data should be saved at
2079 semi-frequent intervals as well as on server shutdown.
2080 * `minetest.register_on_placenode(func(pos, newnode, placer, oldnode, itemstack, pointed_thing))`
2081 * Called when a node has been placed
2082 * If return `true` no item is taken from `itemstack`
2083 * **Not recommended**; use `on_construct` or `after_place_node` in node definition
2085 * `minetest.register_on_dignode(func(pos, oldnode, digger))`
2086 * Called when a node has been dug.
2087 * **Not recommended**; Use `on_destruct` or `after_dig_node` in node definition
2089 * `minetest.register_on_punchnode(func(pos, node, puncher, pointed_thing))`
2090 * Called when a node is punched
2091 * `minetest.register_on_generated(func(minp, maxp, blockseed))`
2092 * Called after generating a piece of world. Modifying nodes inside the area
2093 is a bit faster than usually.
2094 * `minetest.register_on_newplayer(func(ObjectRef))`
2095 * Called after a new player has been created
2096 * `minetest.register_on_dieplayer(func(ObjectRef))`
2097 * Called when a player dies
2098 * `minetest.register_on_punchplayer(func(player, hitter, time_from_last_punch, tool_capabilities, dir, damage))`
2099 * Called when a player is punched
2100 * `player` - ObjectRef - Player that was punched
2101 * `hitter` - ObjectRef - Player that hit
2102 * `time_from_last_punch`: Meant for disallowing spamming of clicks (can be nil)
2103 * `tool_capabilities`: capability table of used tool (can be nil)
2104 * `dir`: unit vector of direction of punch. Always defined. Points from
2105 the puncher to the punched.
2106 * `damage` - number that represents the damage calculated by the engine
2107 * should return `true` to prevent the default damage mechanism
2108 * `minetest.register_on_player_hpchange(func(player, hp_change), modifier)`
2109 * Called when the player gets damaged or healed
2110 * `player`: ObjectRef of the player
2111 * `hp_change`: the amount of change. Negative when it is damage.
2112 * `modifier`: when true, the function should return the actual hp_change.
2113 Note: modifiers only get a temporary hp_change that can be modified by later modifiers.
2114 modifiers can return true as a second argument to stop the execution of further functions.
2115 Non-modifiers receive the final hp change calculated by the modifiers.
2116 * `minetest.register_on_respawnplayer(func(ObjectRef))`
2117 * Called when player is to be respawned
2118 * Called _before_ repositioning of player occurs
2119 * return true in func to disable regular player placement
2120 * `minetest.register_on_prejoinplayer(func(name, ip))`
2121 * Called before a player joins the game
2122 * If it returns a string, the player is disconnected with that string as reason
2123 * `minetest.register_on_joinplayer(func(ObjectRef))`
2124 * Called when a player joins the game
2125 * `minetest.register_on_leaveplayer(func(ObjectRef, timed_out))`
2126 * Called when a player leaves the game
2127 * `timed_out`: True for timeout, false for other reasons.
2128 * `minetest.register_on_cheat(func(ObjectRef, cheat))`
2129 * Called when a player cheats
2130 * `cheat`: `{type=<cheat_type>}`, where `<cheat_type>` is one of:
2132 * `interacted_too_far`
2133 * `interacted_while_dead`
2134 * `finished_unknown_dig`
2137 * `minetest.register_on_chat_message(func(name, message))`
2138 * Called always when a player says something
2139 * Return `true` to mark the message as handled, which means that it will not be sent to other players
2140 * `minetest.register_on_player_receive_fields(func(player, formname, fields))`
2141 * Called when a button is pressed in player's inventory form
2142 * Newest functions are called first
2143 * If function returns `true`, remaining functions are not called
2144 * `minetest.register_on_craft(func(itemstack, player, old_craft_grid, craft_inv))`
2145 * Called when `player` crafts something
2146 * `itemstack` is the output
2147 * `old_craft_grid` contains the recipe (Note: the one in the inventory is cleared)
2148 * `craft_inv` is the inventory with the crafting grid
2149 * Return either an `ItemStack`, to replace the output, or `nil`, to not modify it
2150 * `minetest.register_craft_predict(func(itemstack, player, old_craft_grid, craft_inv))`
2151 * The same as before, except that it is called before the player crafts, to make
2152 craft prediction, and it should not change anything.
2153 * `minetest.register_on_protection_violation(func(pos, name))`
2154 * Called by `builtin` and mods when a player violates protection at a position
2155 (eg, digs a node or punches a protected entity).
2156 * The registered functions can be called using `minetest.record_protection_violation`
2157 * The provided function should check that the position is protected by the mod
2158 calling this function before it prints a message, if it does, to allow for
2159 multiple protection mods.
2160 * `minetest.register_on_item_eat(func(hp_change, replace_with_item, itemstack, user, pointed_thing))`
2161 * Called when an item is eaten, by `minetest.item_eat`
2162 * Return `true` or `itemstack` to cancel the default item eat response (i.e.: hp increase)
2164 ### Other registration functions
2165 * `minetest.register_chatcommand(cmd, chatcommand definition)`
2166 * Adds definition to minetest.registered_chatcommands
2167 * `minetest.override_chatcommand(name, redefinition)`
2168 * Overrides fields of a chatcommand registered with register_chatcommand.
2169 * `minetest.unregister_chatcommand(name)`
2170 * Unregisters a chatcommands registered with register_chatcommand.
2171 * `minetest.register_privilege(name, definition)`
2172 * `definition`: `"description text"`
2173 * `definition`: `{ description = "description text", give_to_singleplayer = boolean}`
2174 the default of `give_to_singleplayer` is true
2175 * To allow players with basic_privs to grant, see basic_privs minetest.conf setting.
2176 * `minetest.register_authentication_handler(handler)`
2177 * See `minetest.builtin_auth_handler` in `builtin.lua` for reference
2180 * `minetest.setting_set(name, value)`
2181 * Setting names can't contain whitespace or any of `="{}#`.
2182 * Setting values can't contain the sequence `\n"""`.
2183 * Setting names starting with "secure." can't be set.
2184 * `minetest.setting_get(name)`: returns string or `nil`
2185 * `minetest.setting_setbool(name, value)`
2186 * See documentation on `setting_set` for restrictions.
2187 * `minetest.setting_getbool(name)`: returns boolean or `nil`
2188 * `minetest.setting_get_pos(name)`: returns position or nil
2189 * `minetest.setting_save()`, returns `nil`, save all settings to config file
2192 * `minetest.notify_authentication_modified(name)`
2193 * Should be called by the authentication handler if privileges changes.
2194 * To report everybody, set `name=nil`.
2195 * `minetest.check_password_entry(name, entry, password)`
2196 * Returns true if the "db entry" for a player with name matches given
2197 * password, false otherwise.
2198 * The "db entry" is the usually player-individual value that is derived
2199 * from the player's chosen password and stored on the server in order to allow
2200 * authentication whenever the player desires to log in.
2201 * Only use this function for making it possible to log in via the password from
2202 * via protocols like IRC, other uses for inside the game are frowned upon.
2203 * `minetest.get_password_hash(name, raw_password)`
2204 * Convert a name-password pair to a password hash that Minetest can use.
2205 * The returned value alone is not a good basis for password checks based
2206 * on comparing the password hash in the database with the password hash
2207 * from the function, with an externally provided password, as the hash
2208 * in the db might use the new SRP verifier format.
2209 * For this purpose, use minetest.check_password_entry instead.
2210 * `minetest.string_to_privs(str)`: returns `{priv1=true,...}`
2211 * `minetest.privs_to_string(privs)`: returns `"priv1,priv2,..."`
2212 * Convert between two privilege representations
2213 * `minetest.set_player_password(name, password_hash)`
2214 * `minetest.set_player_privs(name, {priv1=true,...})`
2215 * `minetest.get_player_privs(name) -> {priv1=true,...}`
2216 * `minetest.auth_reload()`
2217 * `minetest.check_player_privs(player_or_name, ...)`: returns `bool, missing_privs`
2218 * A quickhand for checking privileges.
2219 * `player_or_name`: Either a Player object or the name of a player.
2220 * `...` is either a list of strings, e.g. `"priva", "privb"` or
2221 a table, e.g. `{ priva = true, privb = true }`.
2222 * `minetest.get_player_ip(name)`: returns an IP address string
2224 `minetest.set_player_password`, `minetest_set_player_privs`, `minetest_get_player_privs`
2225 and `minetest.auth_reload` call the authetification handler.
2228 * `minetest.chat_send_all(text)`
2229 * `minetest.chat_send_player(name, text)`
2231 ### Environment access
2232 * `minetest.set_node(pos, node)`
2233 * `minetest.add_node(pos, node): alias set_node(pos, node)`
2234 * Set node at position (`node = {name="foo", param1=0, param2=0}`)
2235 * `minetest.swap_node(pos, node)`
2236 * Set node at position, but don't remove metadata
2237 * `minetest.remove_node(pos)`
2238 * Equivalent to `set_node(pos, "air")`
2239 * `minetest.get_node(pos)`
2240 * Returns the node at the given position as table in the format
2241 `{name="node_name", param1=0, param2=0}`, returns `{name="ignore", param1=0, param2=0}`
2243 * `minetest.get_node_or_nil(pos)`
2244 * Same as `get_node` but returns `nil` for unloaded areas.
2245 * `minetest.get_node_light(pos, timeofday)`
2246 * Gets the light value at the given position. Note that the light value
2247 "inside" the node at the given position is returned, so you usually want
2248 to get the light value of a neighbor.
2249 * `pos`: The position where to measure the light.
2250 * `timeofday`: `nil` for current time, `0` for night, `0.5` for day
2251 * Returns a number between `0` and `15` or `nil`
2252 * `minetest.place_node(pos, node)`
2253 * Place node with the same effects that a player would cause
2254 * `minetest.dig_node(pos)`
2255 * Dig node with the same effects that a player would cause
2256 * Returns `true` if successful, `false` on failure (e.g. protected location)
2257 * `minetest.punch_node(pos)`
2258 * Punch node with the same effects that a player would cause
2259 * `minetest.spawn_falling_node(pos)`
2260 * Change node into falling node
2261 * Returns `true` if successful, `false` on failure
2263 * `minetest.find_nodes_with_meta(pos1, pos2)`
2264 * Get a table of positions of nodes that have metadata within a region {pos1, pos2}
2265 * `minetest.get_meta(pos)`
2266 * Get a `NodeMetaRef` at that position
2267 * `minetest.get_node_timer(pos)`
2268 * Get `NodeTimerRef`
2270 * `minetest.add_entity(pos, name, [staticdata])`: Spawn Lua-defined entity at position
2271 * Returns `ObjectRef`, or `nil` if failed
2272 * `minetest.add_item(pos, item)`: Spawn item
2273 * Returns `ObjectRef`, or `nil` if failed
2274 * `minetest.get_player_by_name(name)`: Get an `ObjectRef` to a player
2275 * `minetest.get_objects_inside_radius(pos, radius)`
2276 * `radius`: using an euclidean metric
2277 * `minetest.set_timeofday(val)`
2278 * `val` is between `0` and `1`; `0` for midnight, `0.5` for midday
2279 * `minetest.get_timeofday()`
2280 * `minetest.get_gametime()`: returns the time, in seconds, since the world was created
2281 * `minetest.get_day_count()`: returns number days elapsed since world was created,
2282 * accounting for time changes.
2283 * `minetest.find_node_near(pos, radius, nodenames, [search_center])`: returns pos or `nil`
2284 * `radius`: using a maximum metric
2285 * `nodenames`: e.g. `{"ignore", "group:tree"}` or `"default:dirt"`
2286 * `search_center` is an optional boolean (default: `false`)
2287 If true `pos` is also checked for the nodes
2288 * `minetest.find_nodes_in_area(minp, maxp, nodenames)`: returns a list of positions
2289 * returns as second value a table with the count of the individual nodes found
2290 * `nodenames`: e.g. `{"ignore", "group:tree"}` or `"default:dirt"`
2291 * `minetest.find_nodes_in_area_under_air(minp, maxp, nodenames)`: returns a list of positions
2292 * returned positions are nodes with a node air above
2293 * `nodenames`: e.g. `{"ignore", "group:tree"}` or `"default:dirt"`
2294 * `minetest.get_perlin(noiseparams)`
2295 * `minetest.get_perlin(seeddiff, octaves, persistence, scale)`
2296 * Return world-specific perlin noise (`int(worldseed)+seeddiff`)
2297 * `minetest.get_voxel_manip([pos1, pos2])`
2298 * Return voxel manipulator object.
2299 * Loads the manipulator from the map if positions are passed.
2300 * `minetest.set_gen_notify(flags, {deco_ids})`
2301 * Set the types of on-generate notifications that should be collected
2302 * `flags` is a flag field with the available flags: `dungeon`, `temple`, `cave_begin`,
2303 `cave_end`, `large_cave_begin`, `large_cave_end`, `decoration`
2304 * The second parameter is a list of IDS of decorations which notification is requested for
2305 * `get_gen_notify()`: returns a flagstring and a table with the deco_ids
2306 * `minetest.get_mapgen_object(objectname)`
2307 * Return requested mapgen object if available (see "Mapgen objects")
2308 * `minetest.get_biome_id(biome_name)`
2309 * Returns the biome id, as used in the biomemap Mapgen object, for a
2310 given biome_name string.
2311 * `minetest.get_mapgen_params()` Returns mapgen parameters, a table containing
2312 `mgname`, `seed`, `chunksize`, `water_level`, and `flags`.
2313 * Deprecated: use minetest.get_mapgen_setting(name) instead
2314 * `minetest.set_mapgen_params(MapgenParams)`
2315 * Deprecated: use minetest.set_mapgen_setting(name, value, override) instead
2316 * Set map generation parameters
2317 * Function cannot be called after the registration period; only initialization
2318 and `on_mapgen_init`
2319 * Takes a table as an argument with the fields `mgname`, `seed`, `water_level`,
2321 * Leave field unset to leave that parameter unchanged
2322 * `flags` contains a comma-delimited string of flags to set,
2323 or if the prefix `"no"` is attached, clears instead.
2324 * `flags` is in the same format and has the same options as `mg_flags` in `minetest.conf`
2325 * `minetest.get_mapgen_setting(name)`
2326 * Gets the *active* mapgen setting (or nil if none exists) in string format with the following
2327 order of precedence:
2328 1) Settings loaded from map_meta.txt or overrides set during mod execution
2329 2) Settings set by mods without a metafile override
2330 3) Settings explicitly set in the user config file, minetest.conf
2331 4) Settings set as the user config default
2332 * `minetest.get_mapgen_setting_noiseparams(name)`
2333 * Same as above, but returns the value as a NoiseParams table if the setting `name` exists
2334 and is a valid NoiseParams
2335 * `minetest.set_mapgen_setting(name, value, [override_meta])`
2336 * Sets a mapgen param to `value`, and will take effect if the corresponding mapgen setting
2337 is not already present in map_meta.txt.
2338 * `override_meta` is an optional boolean (default: `false`). If this is set to true,
2339 the setting will become the active setting regardless of the map metafile contents.
2340 * Note: to set the seed, use "seed", not "fixed_map_seed"
2341 * `minetest.set_mapgen_setting_noiseparams(name, value, [override_meta])`
2342 * Same as above, except value is a NoiseParams table.
2343 * `minetest.set_noiseparams(name, noiseparams, set_default)`
2344 * Sets the noiseparams setting of `name` to the noiseparams table specified in `noiseparams`.
2345 * `set_default` is an optional boolean (default: `true`) that specifies whether the setting
2346 should be applied to the default config or current active config
2347 * `minetest.get_noiseparams(name)`: returns a table of the noiseparams for name
2348 * `minetest.generate_ores(vm, pos1, pos2)`
2349 * Generate all registered ores within the VoxelManip `vm` and in the area from `pos1` to `pos2`.
2350 * `pos1` and `pos2` are optional and default to mapchunk minp and maxp.
2351 * `minetest.generate_decorations(vm, pos1, pos2)`
2352 * Generate all registered decorations within the VoxelManip `vm` and in the area from `pos1` to `pos2`.
2353 * `pos1` and `pos2` are optional and default to mapchunk minp and maxp.
2354 * `minetest.clear_objects([options])`
2355 * Clear all objects in the environment
2356 * Takes an optional table as an argument with the field `mode`.
2357 * mode = `"full"`: Load and go through every mapblock, clearing objects (default).
2358 * mode = `"quick"`: Clear objects immediately in loaded mapblocks;
2359 clear objects in unloaded mapblocks only when the mapblocks are next activated.
2360 * `minetest.emerge_area(pos1, pos2, [callback], [param])`
2361 * Queue all blocks in the area from `pos1` to `pos2`, inclusive, to be asynchronously
2362 * fetched from memory, loaded from disk, or if inexistent, generates them.
2363 * If `callback` is a valid Lua function, this will be called for each block emerged.
2364 * The function signature of callback is:
2365 * `function EmergeAreaCallback(blockpos, action, calls_remaining, param)`
2366 * - `blockpos` is the *block* coordinates of the block that had been emerged
2367 * - `action` could be one of the following constant values:
2368 * `core.EMERGE_CANCELLED`, `core.EMERGE_ERRORED`, `core.EMERGE_FROM_MEMORY`,
2369 * `core.EMERGE_FROM_DISK`, `core.EMERGE_GENERATED`
2370 * - `calls_remaining` is the number of callbacks to be expected after this one
2371 * - `param` is the user-defined parameter passed to emerge_area (or nil if the
2372 * parameter was absent)
2373 * `minetest.delete_area(pos1, pos2)`
2374 * delete all mapblocks in the area from pos1 to pos2, inclusive
2375 * `minetest.line_of_sight(pos1, pos2, stepsize)`: returns `boolean, pos`
2376 * Check if there is a direct line of sight between `pos1` and `pos2`
2377 * Returns the position of the blocking node when `false`
2378 * `pos1`: First position
2379 * `pos2`: Second position
2380 * `stepsize`: smaller gives more accurate results but requires more computing
2381 time. Default is `1`.
2382 * `minetest.find_path(pos1,pos2,searchdistance,max_jump,max_drop,algorithm)`
2383 * returns table containing path
2384 * returns a table of 3D points representing a path from `pos1` to `pos2` or `nil`
2385 * `pos1`: start position
2386 * `pos2`: end position
2387 * `searchdistance`: number of blocks to search in each direction using a maximum metric
2388 * `max_jump`: maximum height difference to consider walkable
2389 * `max_drop`: maximum height difference to consider droppable
2390 * `algorithm`: One of `"A*_noprefetch"` (default), `"A*"`, `"Dijkstra"`
2391 * `minetest.spawn_tree (pos, {treedef})`
2392 * spawns L-system tree at given `pos` with definition in `treedef` table
2393 * Warning: L-system generation currently creates lighting bugs in the form of mapblock-sized shadows.
2394 Often these bugs appear as subtle shadows in water.
2395 * `minetest.transforming_liquid_add(pos)`
2396 * add node to liquid update queue
2397 * `minetest.get_node_max_level(pos)`
2398 * get max available level for leveled node
2399 * `minetest.get_node_level(pos)`
2400 * get level of leveled node (water, snow)
2401 * `minetest.set_node_level(pos, level)`
2402 * set level of leveled node, default `level` equals `1`
2403 * if `totallevel > maxlevel`, returns rest (`total-max`).
2404 * `minetest.add_node_level(pos, level)`
2405 * increase level of leveled node by level, default `level` equals `1`
2406 * if `totallevel > maxlevel`, returns rest (`total-max`)
2407 * can be negative for decreasing
2408 * `minetest.fix_light(pos1, pos2)`: returns `true`/`false`
2409 * resets the light in a cuboid-shaped part of
2410 the map and removes lighting bugs.
2411 * Loads the area if it is not loaded.
2412 * `pos1` is the corner of the cuboid with the least coordinates
2413 (in node coordinates), inclusive.
2414 * `pos2` is the opposite corner of the cuboid, inclusive.
2415 * The actual updated cuboid might be larger than the specified one,
2416 because only whole map blocks can be updated.
2417 The actual updated area consists of those map blocks that intersect
2418 with the given cuboid.
2419 * However, the neighborhood of the updated area might change
2420 as well, as light can spread out of the cuboid, also light
2422 * returns `false` if the area is not fully generated,
2424 * `core.check_single_for_falling(pos)`
2425 * causes an unsupported `group:falling_node` node to fall and causes an
2426 unattached `group:attached_node` node to fall.
2427 * does not spread these updates to neighbours.
2428 * `core.check_for_falling(pos)`
2429 * causes an unsupported `group:falling_node` node to fall and causes an
2430 unattached `group:attached_node` node to fall.
2431 * spread these updates to neighbours and can cause a cascade
2435 `minetest.get_inventory(location)`: returns an `InvRef`
2438 * `{type="player", name="celeron55"}`
2439 * `{type="node", pos={x=, y=, z=}}`
2440 * `{type="detached", name="creative"}`
2441 * `minetest.create_detached_inventory(name, callbacks, [player_name])`: returns an `InvRef`
2442 * callbacks: See "Detached inventory callbacks"
2443 * player_name: Make detached inventory available to one player exclusively,
2444 by default they will be sent to every player (even if not used).
2445 Note that this parameter is mostly just a workaround and will be removed in future releases.
2446 * Creates a detached inventory. If it already exists, it is cleared.
2447 * `minetest.do_item_eat(hp_change, replace_with_item, itemstack, user, pointed_thing)`:
2448 returns left over ItemStack
2449 * See `minetest.item_eat` and `minetest.register_on_item_eat`
2452 * `minetest.show_formspec(playername, formname, formspec)`
2453 * `playername`: name of player to show formspec
2454 * `formname`: name passed to `on_player_receive_fields` callbacks.
2455 It should follow the `"modname:<whatever>"` naming convention
2456 * `formspec`: formspec to display
2457 * `minetest.close_formspec(playername, formname)`
2458 * `playername`: name of player to close formspec
2459 * `formname`: has to exactly match the one given in show_formspec, or the formspec will
2461 * calling show_formspec(playername, formname, "") is equal to this expression
2462 * to close a formspec regardless of the formname, call
2463 minetest.close_formspec(playername, ""). USE THIS ONLY WHEN ABSOLUTELY NECESSARY!
2464 * `minetest.formspec_escape(string)`: returns a string
2465 * escapes the characters "[", "]", "\", "," and ";", which can not be used in formspecs
2466 * `minetest.explode_table_event(string)`: returns a table
2467 * returns e.g. `{type="CHG", row=1, column=2}`
2469 * `"INV"`: no row selected)
2470 * `"CHG"`: selected)
2471 * `"DCL"`: double-click
2472 * `minetest.explode_textlist_event(string)`: returns a table
2473 * returns e.g. `{type="CHG", index=1}`
2475 * `"INV"`: no row selected)
2476 * `"CHG"`: selected)
2477 * `"DCL"`: double-click
2478 * `minetest.explode_scrollbar_event(string)`: returns a table
2479 * returns e.g. `{type="CHG", value=500}`
2481 * `"INV"`: something failed
2482 * `"CHG"`: has been changed
2483 * `"VAL"`: not changed
2486 * `minetest.inventorycube(img1, img2, img3)`
2487 * Returns a string for making an image of a cube (useful as an item image)
2488 * `minetest.get_pointed_thing_position(pointed_thing, above)`
2489 * Get position of a `pointed_thing` (that you can get from somewhere)
2490 * `minetest.dir_to_facedir(dir, is6d)`
2491 * Convert a vector to a facedir value, used in `param2` for `paramtype2="facedir"`;
2492 * passing something non-`nil`/`false` for the optional second parameter causes it to
2493 take the y component into account
2494 * `minetest.facedir_to_dir(facedir)`
2495 * Convert a facedir back into a vector aimed directly out the "back" of a node
2496 * `minetest.dir_to_wallmounted(dir)`
2497 * Convert a vector to a wallmounted value, used for `paramtype2="wallmounted"`
2498 * `minetest.wallmounted_to_dir(wallmounted)`
2499 * Convert a wallmounted value back into a vector aimed directly out the "back" of a node
2500 * `minetest.dir_to_yaw(dir)`
2501 * Convert a vector into a yaw (angle)
2502 * `minetest.yaw_to_dir(yaw)`
2503 * Convert yaw (angle) to a vector
2504 * `minetest.get_node_drops(nodename, toolname)`
2505 * Returns list of item names.
2506 * **Note**: This will be removed or modified in a future version.
2507 * `minetest.get_craft_result(input)`: returns `output, decremented_input`
2508 * `input.method` = `"normal"` or `"cooking"` or `"fuel"`
2509 * `input.width` = for example `3`
2510 * `input.items` = for example
2511 `{ stack1, stack2, stack3, stack4, stack 5, stack 6, stack 7, stack 8, stack 9 }`
2512 * `output.item` = `ItemStack`, if unsuccessful: empty `ItemStack`
2513 * `output.time` = a number, if unsuccessful: `0`
2514 * `output.replacements` = list of `ItemStack`s that couldn't be placed in
2515 `decremented_input.items`
2516 * `decremented_input` = like `input`
2517 * `minetest.get_craft_recipe(output)`: returns input
2518 * returns last registered recipe for output item (node)
2519 * `output` is a node or item type such as `"default:torch"`
2520 * `input.method` = `"normal"` or `"cooking"` or `"fuel"`
2521 * `input.width` = for example `3`
2522 * `input.items` = for example
2523 `{ stack1, stack2, stack3, stack4, stack 5, stack 6, stack 7, stack 8, stack 9 }`
2524 * `input.items` = `nil` if no recipe found
2525 * `minetest.get_all_craft_recipes(query item)`: returns a table or `nil`
2526 * returns indexed table with all registered recipes for query item (node)
2527 or `nil` if no recipe was found
2528 * recipe entry table:
2530 method = 'normal' or 'cooking' or 'fuel'
2531 width = 0-3, 0 means shapeless recipe
2532 items = indexed [1-9] table with recipe items
2533 output = string with item name and quantity
2535 * Example query for `"default:gold_ingot"` will return table:
2537 [1]={type = "cooking", width = 3, output = "default:gold_ingot",
2538 items = {1 = "default:gold_lump"}},
2539 [2]={type = "normal", width = 1, output = "default:gold_ingot 9",
2540 items = {1 = "default:goldblock"}}
2542 * `minetest.handle_node_drops(pos, drops, digger)`
2543 * `drops`: list of itemstrings
2544 * Handles drops from nodes after digging: Default action is to put them into
2546 * Can be overridden to get different functionality (e.g. dropping items on
2550 * `minetest.rollback_get_node_actions(pos, range, seconds, limit)`:
2551 returns `{{actor, pos, time, oldnode, newnode}, ...}`
2552 * Find who has done something to a node, or near a node
2553 * `actor`: `"player:<name>"`, also `"liquid"`.
2554 * `minetest.rollback_revert_actions_by(actor, seconds)`: returns `boolean, log_messages`
2555 * Revert latest actions of someone
2556 * `actor`: `"player:<name>"`, also `"liquid"`.
2558 ### Defaults for the `on_*` item definition functions
2559 These functions return the leftover itemstack.
2561 * `minetest.item_place_node(itemstack, placer, pointed_thing, param2)`
2562 * Place item as a node
2563 * `param2` overrides `facedir` and wallmounted `param2`
2564 * returns `itemstack, success`
2565 * `minetest.item_place_object(itemstack, placer, pointed_thing)`
2567 * `minetest.item_place(itemstack, placer, pointed_thing, param2)`
2568 * Use one of the above based on what the item is.
2569 * Calls `on_rightclick` of `pointed_thing.under` if defined instead
2570 * **Note**: is not called when wielded item overrides `on_place`
2571 * `param2` overrides `facedir` and wallmounted `param2`
2572 * returns `itemstack, success`
2573 * `minetest.item_drop(itemstack, dropper, pos)`
2575 * `minetest.item_eat(hp_change, replace_with_item)`
2577 * `replace_with_item` is the itemstring which is added to the inventory.
2578 If the player is eating a stack, then replace_with_item goes to a
2579 different spot. Can be `nil`
2580 * See `minetest.do_item_eat`
2582 ### Defaults for the `on_punch` and `on_dig` node definition callbacks
2583 * `minetest.node_punch(pos, node, puncher, pointed_thing)`
2584 * Calls functions registered by `minetest.register_on_punchnode()`
2585 * `minetest.node_dig(pos, node, digger)`
2586 * Checks if node can be dug, puts item into inventory, removes node
2587 * Calls functions registered by `minetest.registered_on_dignodes()`
2590 * `minetest.sound_play(spec, parameters)`: returns a handle
2591 * `spec` is a `SimpleSoundSpec`
2592 * `parameters` is a sound parameter table
2593 * `minetest.sound_stop(handle)`
2594 * `minetest.sound_fade(handle, step, gain)`
2595 * `handle` is a handle returned by minetest.sound_play
2596 * `step` determines how fast a sound will fade.
2597 Negative step will lower the sound volume, positive step will increase the sound volume
2598 * `gain` the target gain for the fade.
2601 * `minetest.after(time, func, ...)`
2602 * Call the function `func` after `time` seconds, may be fractional
2603 * Optional: Variable number of arguments that are passed to `func`
2606 * `minetest.request_shutdown([message],[reconnect],[delay])`: request for server shutdown. Will display `message` to clients,
2607 `reconnect` == true displays a reconnect button,
2608 `delay` adds an optional delay (in seconds) before shutdown
2609 negative delay cancels the current active shutdown
2610 zero delay triggers an immediate shutdown.
2611 * `minetest.cancel_shutdown_requests()`: cancel current delayed shutdown
2612 * `minetest.get_server_status()`: returns server status string
2613 * `minetest.get_server_uptime()`: returns the server uptime in seconds
2614 * `minetest.remove_player(name)`: remove player from database (if he is not connected).
2615 * Returns a code (0: successful, 1: no such player, 2: player is connected)
2618 * `minetest.get_ban_list()`: returns the ban list (same as `minetest.get_ban_description("")`)
2619 * `minetest.get_ban_description(ip_or_name)`: returns ban description (string)
2620 * `minetest.ban_player(name)`: ban a player
2621 * `minetest.unban_player_or_ip(name)`: unban player or IP address
2622 * `minetest.kick_player(name, [reason])`: disconnect a player with a optional reason
2625 * `minetest.add_particle(particle definition)`
2626 * Deprecated: `minetest.add_particle(pos, velocity, acceleration, expirationtime,
2627 size, collisiondetection, texture, playername)`
2629 * `minetest.add_particlespawner(particlespawner definition)`
2630 * Add a `ParticleSpawner`, an object that spawns an amount of particles over `time` seconds
2631 * Returns an `id`, and -1 if adding didn't succeed
2632 * `Deprecated: minetest.add_particlespawner(amount, time,
2636 minexptime, maxexptime,
2638 collisiondetection, texture, playername)`
2640 * `minetest.delete_particlespawner(id, player)``
2641 * Delete `ParticleSpawner` with `id` (return value from `minetest.add_particlespawner`)
2642 * If playername is specified, only deletes on the player's client,
2643 * otherwise on all clients
2646 * `minetest.create_schematic(p1, p2, probability_list, filename, slice_prob_list)`
2647 * Create a schematic from the volume of map specified by the box formed by p1 and p2.
2648 * Apply the specified probability values to the specified nodes in `probability_list`.
2649 * `probability_list` is an array of tables containing two fields, `pos` and `prob`.
2650 * `pos` is the 3D vector specifying the absolute coordinates of the
2651 node being modified,
2652 * `prob` is the integer value from `0` to `255` of the probability (see: Schematic specifier).
2653 * If there are two or more entries with the same pos value, the
2655 * If `pos` is not inside the box formed by `p1` and `p2`, it is ignored.
2656 * If `probability_list` equals `nil`, no probabilities are applied.
2657 * Slice probability works in the same manner, except takes a field
2658 called `ypos` instead which
2659 indicates the y position of the slice with a probability applied.
2660 * If slice probability list equals `nil`, no slice probabilities are applied.
2661 * Saves schematic in the Minetest Schematic format to filename.
2663 * `minetest.place_schematic(pos, schematic, rotation, replacements, force_placement)`
2664 * Place the schematic specified by schematic (see: Schematic specifier) at `pos`.
2665 * `rotation` can equal `"0"`, `"90"`, `"180"`, `"270"`, or `"random"`.
2666 * If the `rotation` parameter is omitted, the schematic is not rotated.
2667 * `replacements` = `{["old_name"] = "convert_to", ...}`
2668 * `force_placement` is a boolean indicating whether nodes other than `air` and
2669 `ignore` are replaced by the schematic
2670 * Returns nil if the schematic could not be loaded.
2672 * `minetest.place_schematic_on_vmanip(vmanip, pos, schematic, rotation, replacement, force_placement)`:
2673 * This function is analagous to minetest.place_schematic, but places a schematic onto the
2674 specified VoxelManip object `vmanip` instead of the whole map.
2675 * Returns false if any part of the schematic was cut-off due to the VoxelManip not
2676 containing the full area required, and true if the whole schematic was able to fit.
2677 * Returns nil if the schematic could not be loaded.
2678 * After execution, any external copies of the VoxelManip contents are invalidated.
2680 * `minetest.serialize_schematic(schematic, format, options)`
2681 * Return the serialized schematic specified by schematic (see: Schematic specifier)
2682 * in the `format` of either "mts" or "lua".
2683 * "mts" - a string containing the binary MTS data used in the MTS file format
2684 * "lua" - a string containing Lua code representing the schematic in table format
2685 * `options` is a table containing the following optional parameters:
2686 * If `lua_use_comments` is true and `format` is "lua", the Lua code generated will have (X, Z)
2687 * position comments for every X row generated in the schematic data for easier reading.
2688 * If `lua_num_indent_spaces` is a nonzero number and `format` is "lua", the Lua code generated
2689 * will use that number of spaces as indentation instead of a tab character.
2692 * `minetest.request_http_api()`:
2693 * returns `HTTPApiTable` containing http functions if the calling mod has been granted
2694 access by being listed in the `secure.http_mods` or `secure.trusted_mods` setting,
2695 otherwise returns `nil`.
2696 * The returned table contains the functions `fetch`, `fetch_async` and `fetch_async_get`
2698 * Only works at init time and must be called from the mod's main scope (not from a function).
2699 * Function only exists if minetest server was built with cURL support.
2700 * **DO NOT ALLOW ANY OTHER MODS TO ACCESS THE RETURNED TABLE, STORE IT IN
2702 * `HTTPApiTable.fetch(HTTPRequest req, callback)`
2703 * Performs given request asynchronously and calls callback upon completion
2704 * callback: `function(HTTPRequestResult res)`
2705 * Use this HTTP function if you are unsure, the others are for advanced use.
2706 * `HTTPApiTable.fetch_async(HTTPRequest req)`: returns handle
2707 * Performs given request asynchronously and returns handle for `HTTPApiTable.fetch_async_get`
2708 * `HTTPApiTable.fetch_async_get(handle)`: returns HTTPRequestResult
2709 * Return response data for given asynchronous HTTP request
2712 * `minetest.get_mod_storage()`:
2713 * returns reference to mod private `StorageRef`
2714 * must be called during mod load time
2717 * `minetest.get_connected_players()`: returns list of `ObjectRefs`
2718 * `minetest.player_exists(name)`: boolean, whether player exists (regardless of online status)
2719 * `minetest.hud_replace_builtin(name, hud_definition)`
2720 * Replaces definition of a builtin hud element
2721 * `name`: `"breath"` or `"health"`
2722 * `hud_definition`: definition to replace builtin definition
2723 * `minetest.hash_node_position({x=,y=,z=})`: returns an 48-bit integer
2724 * Gives a unique hash number for a node position (16+16+16=48bit)
2725 * `minetest.get_position_from_hash(hash)`: returns a position
2726 * Inverse transform of `minetest.hash_node_position`
2727 * `minetest.get_item_group(name, group)`: returns a rating
2728 * Get rating of a group of an item. (`0` means: not in group)
2729 * `minetest.get_node_group(name, group)`: returns a rating
2730 * Deprecated: An alias for the former.
2731 * `minetest.raillike_group(name)`: returns a rating
2732 * Returns rating of the connect_to_raillike group corresponding to name
2733 * If name is not yet the name of a connect_to_raillike group, a new group id
2734 * is created, with that name
2735 * `minetest.get_content_id(name)`: returns an integer
2736 * Gets the internal content ID of `name`
2737 * `minetest.get_name_from_content_id(content_id)`: returns a string
2738 * Gets the name of the content with that content ID
2739 * `minetest.parse_json(string[, nullvalue])`: returns something
2740 * Convert a string containing JSON data into the Lua equivalent
2741 * `nullvalue`: returned in place of the JSON null; defaults to `nil`
2742 * On success returns a table, a string, a number, a boolean or `nullvalue`
2743 * On failure outputs an error message and returns `nil`
2744 * Example: `parse_json("[10, {\"a\":false}]")`, returns `{10, {a = false}}`
2745 * `minetest.write_json(data[, styled])`: returns a string or `nil` and an error message
2746 * Convert a Lua table into a JSON string
2747 * styled: Outputs in a human-readable format if this is set, defaults to false
2748 * Unserializable things like functions and userdata will cause an error.
2749 * **Warning**: JSON is more strict than the Lua table format.
2750 1. You can only use strings and positive integers of at least one as keys.
2751 2. You can not mix string and integer keys.
2752 This is due to the fact that JSON has two distinct array and object values.
2753 * Example: `write_json({10, {a = false}})`, returns `"[10, {\"a\": false}]"`
2754 * `minetest.serialize(table)`: returns a string
2755 * Convert a table containing tables, strings, numbers, booleans and `nil`s
2756 into string form readable by `minetest.deserialize`
2757 * Example: `serialize({foo='bar'})`, returns `'return { ["foo"] = "bar" }'`
2758 * `minetest.deserialize(string)`: returns a table
2759 * Convert a string returned by `minetest.deserialize` into a table
2760 * `string` is loaded in an empty sandbox environment.
2761 * Will load functions, but they cannot access the global environment.
2762 * Example: `deserialize('return { ["foo"] = "bar" }')`, returns `{foo='bar'}`
2763 * Example: `deserialize('print("foo")')`, returns `nil` (function call fails)
2764 * `error:[string "print("foo")"]:1: attempt to call global 'print' (a nil value)`
2765 * `minetest.compress(data, method, ...)`: returns `compressed_data`
2766 * Compress a string of data.
2767 * `method` is a string identifying the compression method to be used.
2768 * Supported compression methods:
2769 * Deflate (zlib): `"deflate"`
2770 * `...` indicates method-specific arguments. Currently defined arguments are:
2771 * Deflate: `level` - Compression level, `0`-`9` or `nil`.
2772 * `minetest.decompress(compressed_data, method, ...)`: returns data
2773 * Decompress a string of data (using ZLib).
2774 * See documentation on `minetest.compress()` for supported compression methods.
2775 * currently supported.
2776 * `...` indicates method-specific arguments. Currently, no methods use this.
2777 * `minetest.encode_base64(string)`: returns string encoded in base64
2778 * Encodes a string in base64.
2779 * `minetest.decode_base64(string)`: returns string
2780 * Decodes a string encoded in base64.
2781 * `minetest.is_protected(pos, name)`: returns boolean
2782 * Returns true, if player `name` shouldn't be abled to dig at `pos` or do other
2783 actions, defineable by mods, due to some mod-defined ownership-like concept.
2784 Returns false or nil, if the player is allowed to do such actions.
2785 * This function should be overridden by protection mods and should be used to
2786 check if a player can interact at a position.
2787 * This function should call the old version of itself if the position is not
2788 protected by the mod.
2791 local old_is_protected = minetest.is_protected
2792 function minetest.is_protected(pos, name)
2793 if mymod:position_protected_from(pos, name) then
2796 return old_is_protected(pos, name)
2798 * `minetest.record_protection_violation(pos, name)`
2799 * This function calls functions registered with
2800 `minetest.register_on_protection_violation`.
2801 * `minetest.rotate_and_place(itemstack, placer, pointed_thing, infinitestacks, orient_flags)`
2802 * Attempt to predict the desired orientation of the facedir-capable node
2803 defined by `itemstack`, and place it accordingly (on-wall, on the floor, or
2804 hanging from the ceiling). Stacks are handled normally if the `infinitestacks`
2805 field is false or omitted (else, the itemstack is not changed). `orient_flags`
2806 is an optional table containing extra tweaks to the placement code:
2807 * `invert_wall`: if `true`, place wall-orientation on the ground and ground-
2808 orientation on the wall.
2809 * `force_wall` : if `true`, always place the node in wall orientation.
2810 * `force_ceiling`: if `true`, always place on the ceiling.
2811 * `force_floor`: if `true`, always place the node on the floor.
2812 * `force_facedir`: if `true`, forcefully reset the facedir to north when placing on
2813 the floor or ceiling
2814 * The first four options are mutually-exclusive; the last in the list takes
2815 precedence over the first.
2816 * `minetest.rotate_node(itemstack, placer, pointed_thing)`
2817 * calls `rotate_and_place()` with infinitestacks set according to the state of
2818 the creative mode setting, and checks for "sneak" to set the `invert_wall`
2821 * `minetest.forceload_block(pos[, transient])`
2822 * forceloads the position `pos`.
2823 * returns `true` if area could be forceloaded
2824 * If `transient` is `false` or absent, the forceload will be persistent
2825 (saved between server runs). If `true`, the forceload will be transient
2826 (not saved between server runs).
2828 * `minetest.forceload_free_block(pos[, transient])`
2829 * stops forceloading the position `pos`
2830 * If `transient` is `false` or absent, frees a persistent forceload.
2831 If `true`, frees a transient forceload.
2833 * `minetest.request_insecure_environment()`: returns an environment containing
2834 insecure functions if the calling mod has been listed as trusted in the
2835 `secure.trusted_mods` setting or security is disabled, otherwise returns `nil`.
2836 * Only works at init time and must be called from the mod's main scope (not from a function).
2837 * **DO NOT ALLOW ANY OTHER MODS TO ACCESS THE RETURNED ENVIRONMENT, STORE IT IN
2840 * `minetest.global_exists(name)`
2841 * Checks if a global variable has been set, without triggering a warning.
2844 * `minetest.env`: `EnvRef` of the server environment and world.
2845 * Any function in the minetest namespace can be called using the syntax
2846 `minetest.env:somefunction(somearguments)`
2847 instead of `minetest.somefunction(somearguments)`
2848 * Deprecated, but support is not to be dropped soon
2851 * `minetest.registered_items`
2852 * Map of registered items, indexed by name
2853 * `minetest.registered_nodes`
2854 * Map of registered node definitions, indexed by name
2855 * `minetest.registered_craftitems`
2856 * Map of registered craft item definitions, indexed by name
2857 * `minetest.registered_tools`
2858 * Map of registered tool definitions, indexed by name
2859 * `minetest.registered_entities`
2860 * Map of registered entity prototypes, indexed by name
2861 * `minetest.object_refs`
2862 * Map of object references, indexed by active object id
2863 * `minetest.luaentities`
2864 * Map of Lua entities, indexed by active object id
2865 * `minetest.registered_chatcommands`
2866 * Map of registered chat command definitions, indexed by name
2867 * `minetest.registered_ores`
2868 * List of registered ore definitions.
2869 * `minetest.registered_biomes`
2870 * List of registered biome definitions.
2871 * `minetest.registered_decorations`
2872 * List of registered decoration definitions.
2878 See `StorageRef`, `NodeMetaRef` and `ItemStackMetaRef`.
2881 * `set_string(name, value)`
2882 * `get_string(name)`
2883 * `set_int(name, value)`
2885 * `set_float(name, value)`
2887 * `to_table()`: returns `nil` or a table with keys:
2888 * `fields`: key-value storage
2889 * `inventory`: `{list1 = {}, ...}}` (NodeMetaRef only)
2890 * `from_table(nil or {})`
2891 * Any non-table value will clear the metadata
2892 * See "Node Metadata" for an example
2893 * returns `true` on success
2895 * returns `true` if this metadata has the same key-value pairs as `other`
2898 Node metadata: reference extra data and functionality stored in a node.
2899 Can be obtained via `minetest.get_meta(pos)`.
2902 * All methods in MetaDataRef
2903 * `get_inventory()`: returns `InvRef`
2905 ### `ItemStackMetaRef`
2906 ItemStack metadata: reference extra data and functionality stored in a stack.
2907 Can be obtained via `item:get_meta()`.
2910 * All methods in MetaDataRef
2913 Mod metadata: per mod metadata, saved automatically.
2914 Can be obtained via `minetest.get_mod_storage()` during load time.
2917 * All methods in MetaDataRef
2920 Node Timers: a high resolution persistent per-node timer.
2921 Can be gotten via `minetest.get_node_timer(pos)`.
2924 * `set(timeout,elapsed)`
2925 * set a timer's state
2926 * `timeout` is in seconds, and supports fractional values (0.1 etc)
2927 * `elapsed` is in seconds, and supports fractional values (0.1 etc)
2928 * will trigger the node's `on_timer` function after `timeout`-elapsed seconds
2931 * equivalent to `set(timeout,0)`
2934 * `get_timeout()`: returns current timeout in seconds
2935 * if `timeout` equals `0`, timer is inactive
2936 * `get_elapsed()`: returns current elapsed time in seconds
2937 * the node's `on_timer` function will be called after `timeout`-elapsed seconds
2938 * `is_started()`: returns boolean state of timer
2939 * returns `true` if timer is started, otherwise `false`
2942 Moving things in the game are generally these.
2944 This is basically a reference to a C++ `ServerActiveObject`
2947 * `remove()`: remove object (after returning from Lua)
2948 * Note: Doesn't work on players, use minetest.kick_player instead
2949 * `get_pos()`: returns `{x=num, y=num, z=num}`
2950 * `set_pos(pos)`; `pos`=`{x=num, y=num, z=num}`
2951 * `move_to(pos, continuous=false)`: interpolated move
2952 * `punch(puncher, time_from_last_punch, tool_capabilities, direction)`
2953 * `puncher` = another `ObjectRef`,
2954 * `time_from_last_punch` = time since last punch action of the puncher
2955 * `direction`: can be `nil`
2956 * `right_click(clicker)`; `clicker` is another `ObjectRef`
2957 * `get_hp()`: returns number of hitpoints (2 * number of hearts)
2958 * `set_hp(hp)`: set number of hitpoints (2 * number of hearts)
2959 * `get_inventory()`: returns an `InvRef`
2960 * `get_wield_list()`: returns the name of the inventory list the wielded item is in
2961 * `get_wield_index()`: returns the index of the wielded item
2962 * `get_wielded_item()`: returns an `ItemStack`
2963 * `set_wielded_item(item)`: replaces the wielded item, returns `true` if successful
2964 * `set_armor_groups({group1=rating, group2=rating, ...})`
2965 * `get_armor_groups()`: returns a table with the armor group ratings
2966 * `set_animation({x=1,y=1}, frame_speed=15, frame_blend=0, frame_loop=true)`
2967 * `get_animation()`: returns range, frame_speed, frame_blend and frame_loop
2968 * `set_attach(parent, bone, position, rotation)`
2970 * `position`: `{x=num, y=num, z=num}` (relative)
2971 * `rotation`: `{x=num, y=num, z=num}`
2972 * `get_attach()`: returns parent, bone, position, rotation or nil if it isn't attached
2974 * `set_bone_position(bone, position, rotation)`
2976 * `position`: `{x=num, y=num, z=num}` (relative)
2977 * `rotation`: `{x=num, y=num, z=num}`
2978 * `get_bone_position(bone)`: returns position and rotation of the bone
2979 * `set_properties(object property table)`
2980 * `get_properties()`: returns object property table
2981 * `is_player()`: returns true for players, false otherwise
2982 * `get_nametag_attributes()`
2983 * returns a table with the attributes of the nametag of an object
2985 color = {a=0..255, r=0..255, g=0..255, b=0..255},
2988 * `set_nametag_attributes(attributes)`
2989 * sets the attributes of the nametag of an object
2993 text = "My Nametag",
2996 ##### LuaEntitySAO-only (no-op for other objects)
2997 * `set_velocity({x=num, y=num, z=num})`
2998 * `get_velocity()`: returns `{x=num, y=num, z=num}`
2999 * `set_acceleration({x=num, y=num, z=num})`
3000 * `get_acceleration()`: returns `{x=num, y=num, z=num}`
3001 * `set_yaw(radians)`
3002 * `get_yaw()`: returns number in radians
3003 * `set_texture_mod(mod)`
3004 * `get_texture_mod()` returns current texture modifier
3005 * `set_sprite(p={x=0,y=0}, num_frames=1, framelength=0.2,
3006 select_horiz_by_yawpitch=false)`
3007 * Select sprite from spritesheet with optional animation and DM-style
3008 texture selection based on yaw relative to camera
3009 * `get_entity_name()` (**Deprecated**: Will be removed in a future version)
3012 ##### Player-only (no-op for other objects)
3013 * `get_player_name()`: returns `""` if is not a player
3014 * `get_player_velocity()`: returns `nil` if is not a player, otherwise a
3015 table {x, y, z} representing the player's instantaneous velocity in nodes/s
3016 * `get_look_dir()`: get camera direction as a unit vector
3017 * `get_look_vertical()`: pitch in radians
3018 * Angle ranges between -pi/2 and pi/2, which are straight up and down respectively.
3019 * `get_look_horizontal()`: yaw in radians
3020 * Angle is counter-clockwise from the +z direction.
3021 * `set_look_vertical(radians)`: sets look pitch
3022 * radians - Angle from looking forward, where positive is downwards.
3023 * `set_look_horizontal(radians)`: sets look yaw
3024 * radians - Angle from the +z direction, where positive is counter-clockwise.
3025 * `get_look_pitch()`: pitch in radians - Deprecated as broken. Use get_look_vertical.
3026 * Angle ranges between -pi/2 and pi/2, which are straight down and up respectively.
3027 * `get_look_yaw()`: yaw in radians - Deprecated as broken. Use get_look_horizontal.
3028 * Angle is counter-clockwise from the +x direction.
3029 * `set_look_pitch(radians)`: sets look pitch - Deprecated. Use set_look_vertical.
3030 * `set_look_yaw(radians)`: sets look yaw - Deprecated. Use set_look_horizontal.
3031 * `get_breath()`: returns players breath
3032 * `set_breath(value)`: sets players breath
3034 * `0`: player is drowning,
3035 * `1`-`10`: remaining number of bubbles
3036 * `11`: bubbles bar is not shown
3037 * `set_attribute(attribute, value)`: sets an extra attribute with value on player
3038 * `get_attribute(attribute)`: returns value for extra attribute. Returns nil if no attribute found.
3039 * `set_inventory_formspec(formspec)`
3040 * Redefine player's inventory form
3041 * Should usually be called in on_joinplayer
3042 * `get_inventory_formspec()`: returns a formspec string
3043 * `get_player_control()`: returns table with player pressed keys
3044 * `{jump=bool,right=bool,left=bool,LMB=bool,RMB=bool,sneak=bool,aux1=bool,down=bool,up=bool}`
3045 * `get_player_control_bits()`: returns integer with bit packed player pressed keys
3046 * bit nr/meaning: 0/up ,1/down ,2/left ,3/right ,4/jump ,5/aux1 ,6/sneak ,7/LMB ,8/RMB
3047 * `set_physics_override(override_table)`
3048 * `override_table` is a table with the following fields:
3049 * `speed`: multiplier to default walking speed value (default: `1`)
3050 * `jump`: multiplier to default jump value (default: `1`)
3051 * `gravity`: multiplier to default gravity value (default: `1`)
3052 * `sneak`: whether player can sneak (default: `true`)
3053 * `sneak_glitch`: whether player can use the new move code replications
3054 of the old sneak side-effects: sneak ladders and 2 node sneak jump
3056 * `new_move`: use new move/sneak code. When `false` the exact old code
3057 is used for the specific old sneak behaviour (default: `true`)
3058 * `get_physics_override()`: returns the table given to set_physics_override
3059 * `hud_add(hud definition)`: add a HUD element described by HUD def, returns ID
3061 * `hud_remove(id)`: remove the HUD element of the specified id
3062 * `hud_change(id, stat, value)`: change a value of a previously added HUD element
3063 * element `stat` values: `position`, `name`, `scale`, `text`, `number`, `item`, `dir`
3064 * `hud_get(id)`: gets the HUD element definition structure of the specified ID
3065 * `hud_set_flags(flags)`: sets specified HUD flags to `true`/`false`
3066 * `flags`: (is visible) `hotbar`, `healthbar`, `crosshair`, `wielditem`, `minimap`
3067 * pass a table containing a `true`/`false` value of each flag to be set or unset
3068 * if a flag equals `nil`, the flag is not modified
3069 * note that setting `minimap` modifies the client's permission to view the minimap -
3070 * the client may locally elect to not view the minimap
3071 * `hud_get_flags()`: returns a table containing status of hud flags
3072 * returns `{ hotbar=true, healthbar=true, crosshair=true, wielditem=true, breathbar=true, minimap=true }`
3073 * `hud_set_hotbar_itemcount(count)`: sets number of items in builtin hotbar
3074 * `count`: number of items, must be between `1` and `23`
3075 * `hud_get_hotbar_itemcount`: returns number of visible items
3076 * `hud_set_hotbar_image(texturename)`
3077 * sets background image for hotbar
3078 * `hud_get_hotbar_image`: returns texturename
3079 * `hud_set_hotbar_selected_image(texturename)`
3080 * sets image for selected item of hotbar
3081 * `hud_get_hotbar_selected_image`: returns texturename
3082 * `set_sky(bgcolor, type, {texture names}, clouds)`
3083 * `bgcolor`: ColorSpec, defaults to white
3084 * `type`: Available types:
3085 * `"regular"`: Uses 0 textures, `bgcolor` ignored
3086 * `"skybox"`: Uses 6 textures, `bgcolor` used
3087 * `"plain"`: Uses 0 textures, `bgcolor` used
3088 * `clouds`: Boolean for whether clouds appear in front of `"skybox"` or
3089 `"plain"` custom skyboxes (default: `true`)
3090 * `get_sky()`: returns bgcolor, type, table of textures, clouds
3091 * `set_clouds(parameters)`: set cloud parameters
3092 * `parameters` is a table with the following optional fields:
3093 * `density`: from `0` (no clouds) to `1` (full clouds) (default `0.4`)
3094 * `color`: basic cloud color, with alpha channel (default `#fff0f0e5`)
3095 * `ambient`: cloud color lower bound, use for a "glow at night" effect (default `#000000`)
3096 * `height`: cloud height, i.e. y of cloud base (default per conf, usually `120`)
3097 * `thickness`: cloud thickness in nodes (default `16`)
3098 * `speed`: 2D cloud speed + direction in nodes per second (default `{x=0, y=-2}`)
3099 * `get_clouds()`: returns a table with the current cloud parameters as in `set_clouds`
3100 * `override_day_night_ratio(ratio or nil)`
3101 * `0`...`1`: Overrides day-night ratio, controlling sunlight to a specific amount
3102 * `nil`: Disables override, defaulting to sunlight based on day-night cycle
3103 * `get_day_night_ratio()`: returns the ratio or nil if it isn't overridden
3104 * `set_local_animation(stand/idle, walk, dig, walk+dig, frame_speed=frame_speed)`
3106 set animation for player model in third person view
3108 set_local_animation({x=0, y=79}, -- < stand/idle animation key frames
3109 {x=168, y=187}, -- < walk animation key frames
3110 {x=189, y=198}, -- < dig animation key frames
3111 {x=200, y=219}, -- < walk+dig animation key frames
3112 frame_speed=30): -- < animation frame speed
3113 * `get_local_animation()`: returns stand, walk, dig, dig+walk tables and frame_speed
3114 * `set_eye_offset({x=0,y=0,z=0},{x=0,y=0,z=0})`: defines offset value for camera per player
3115 * in first person view
3116 * in third person view (max. values `{x=-10/10,y=-10,15,z=-5/5}`)
3117 * `get_eye_offset()`: returns offset_first and offset_third
3120 An `InvRef` is a reference to an inventory.
3123 * `is_empty(listname)`: return `true` if list is empty
3124 * `get_size(listname)`: get size of a list
3125 * `set_size(listname, size)`: set size of a list
3126 * returns `false` on error (e.g. invalid `listname` or `size`)
3127 * `get_width(listname)`: get width of a list
3128 * `set_width(listname, width)`: set width of list; currently used for crafting
3129 * `get_stack(listname, i)`: get a copy of stack index `i` in list
3130 * `set_stack(listname, i, stack)`: copy `stack` to index `i` in list
3131 * `get_list(listname)`: return full list
3132 * `set_list(listname, list)`: set full list (size will not change)
3133 * `get_lists()`: returns list of inventory lists
3134 * `set_lists(lists)`: sets inventory lists (size will not change)
3135 * `add_item(listname, stack)`: add item somewhere in list, returns leftover `ItemStack`
3136 * `room_for_item(listname, stack):` returns `true` if the stack of items
3137 can be fully added to the list
3138 * `contains_item(listname, stack)`: returns `true` if the stack of items
3139 can be fully taken from the list
3140 * `remove_item(listname, stack)`: take as many items as specified from the list,
3141 returns the items that were actually removed (as an `ItemStack`) -- note that
3142 any item metadata is ignored, so attempting to remove a specific unique
3143 item this way will likely remove the wrong one -- to do that use `set_stack`
3144 with an empty `ItemStack`
3145 * `get_location()`: returns a location compatible to `minetest.get_inventory(location)`
3146 * returns `{type="undefined"}` in case location is not known
3149 A fast access data structure to store areas, and find areas near a given position or area.
3150 Every area has a `data` string attribute to store additional information.
3151 You can create an empty `AreaStore` by calling `AreaStore()`, or `AreaStore(type_name)`.
3152 If you chose the parameter-less constructor, a fast implementation will be automatically
3156 * `get_area(id, include_borders, include_data)`: returns the area with the id `id`.
3157 (optional) Boolean values `include_borders` and `include_data` control what's copied.
3158 Returns nil if specified area id does not exist.
3159 * `get_areas_for_pos(pos, include_borders, include_data)`: returns all areas that contain
3160 the position `pos`. (optional) Boolean values `include_borders` and `include_data` control
3162 * `get_areas_in_area(edge1, edge2, accept_overlap, include_borders, include_data)`:
3163 returns all areas that contain all nodes inside the area specified by `edge1` and `edge2` (inclusive).
3164 If `accept_overlap` is true, also areas are returned that have nodes in common with the specified area.
3165 (optional) Boolean values `include_borders` and `include_data` control what's copied.
3166 * `insert_area(edge1, edge2, data, [id])`: inserts an area into the store. Returns the new area's ID,
3167 or nil if the insertion failed. The (inclusive) positions `edge1` and `edge2` describe the area.
3168 `data` is a string stored with the area. If passed, `id` will be used as the internal area ID,
3169 it must be a unique number between 0 and 2^32-2. If you use the `id` parameter you must always use it,
3170 or insertions are likely to fail due to conflicts.
3171 * `reserve(count)`: reserves resources for at most `count` many contained areas.
3172 Only needed for efficiency, and only some implementations profit.
3173 * `remove_area(id)`: removes the area with the given id from the store, returns success.
3174 * `set_cache_params(params)`: sets params for the included prefiltering cache.
3175 Calling invalidates the cache, so that its elements have to be newly generated.
3178 enabled = boolean, -- whether to enable, default true
3179 block_radius = number, -- the radius (in nodes) of the areas the cache generates
3180 prefiltered lists for, minimum 16, default 64
3181 limit = number, -- the cache's size, minimum 20, default 1000
3183 * `to_string()`: Experimental. Returns area store serialized as a (binary) string.
3184 * `to_file(filename)`: Experimental. Like `to_string()`, but writes the data to a file.
3185 * `from_string(str)`: Experimental. Deserializes string and loads it into the AreaStore.
3186 Returns success and, optionally, an error message.
3187 * `from_file(filename)`: Experimental. Like `from_string()`, but reads the data from a file.
3190 An `ItemStack` is a stack of items.
3192 It can be created via `ItemStack(x)`, where x is an `ItemStack`,
3193 an itemstring, a table or `nil`.
3196 * `is_empty()`: Returns `true` if stack is empty.
3197 * `get_name()`: Returns item name (e.g. `"default:stone"`).
3198 * `set_name(item_name)`: Returns boolean whether item was cleared
3199 * `get_count()`: Returns number of items on the stack.
3200 * `set_count(count)`: Returns boolean whether item was cleared
3201 * `get_wear()`: Returns tool wear (`0`-`65535`), `0` for non-tools.
3202 * `set_wear(wear)`: Returns boolean whether item was cleared
3203 * `get_meta()`: Returns ItemStackMetaRef. See section for more details
3204 * `get_metadata()`: (DEPRECATED) Returns metadata (a string attached to an item stack).
3205 * `set_metadata(metadata)`: (DEPRECATED) Returns true.
3206 * `clear()`: removes all items from the stack, making it empty.
3207 * `replace(item)`: replace the contents of this stack.
3208 * `item` can also be an itemstring or table.
3209 * `to_string()`: Returns the stack in itemstring form.
3210 * `to_table()`: Returns the stack in Lua table form.
3211 * `get_stack_max()`: Returns the maximum size of the stack (depends on the item).
3212 * `get_free_space()`: Returns `get_stack_max() - get_count()`.
3213 * `is_known()`: Returns `true` if the item name refers to a defined item type.
3214 * `get_definition()`: Returns the item definition table.
3215 * `get_tool_capabilities()`: Returns the digging properties of the item,
3216 or those of the hand if none are defined for this item type
3217 * `add_wear(amount)`: Increases wear by `amount` if the item is a tool.
3218 * `add_item(item)`: Put some item or stack onto this stack.
3219 Returns leftover `ItemStack`.
3220 * `item_fits(item)`: Returns `true` if item or stack can be fully added to
3222 * `take_item(n=1)`: Take (and remove) up to `n` items from this stack.
3223 Returns taken `ItemStack`.
3224 * `peek_item(n=1)`: copy (don't remove) up to `n` items from this stack.
3225 Returns taken `ItemStack`.
3228 A 16-bit pseudorandom number generator.
3229 Uses a well-known LCG algorithm introduced by K&R.
3231 It can be created via `PseudoRandom(seed)`.
3234 * `next()`: return next integer random number [`0`...`32767`]
3235 * `next(min, max)`: return next integer random number [`min`...`max`]
3236 * `((max - min) == 32767) or ((max-min) <= 6553))` must be true
3237 due to the simple implementation making bad distribution otherwise.
3240 A 32-bit pseudorandom number generator.
3241 Uses PCG32, an algorithm of the permuted congruential generator family, offering very strong randomness.
3243 It can be created via `PcgRandom(seed)` or `PcgRandom(seed, sequence)`.
3246 * `next()`: return next integer random number [`-2147483648`...`2147483647`]
3247 * `next(min, max)`: return next integer random number [`min`...`max`]
3248 * `rand_normal_dist(min, max, num_trials=6)`: return normally distributed random number [`min`...`max`]
3249 * This is only a rough approximation of a normal distribution with:
3250 * mean = (max - min) / 2, and
3251 * variance = (((max - min + 1) ^ 2) - 1) / (12 * num_trials)
3252 * Increasing num_trials improves accuracy of the approximation
3255 Interface for the operating system's crypto-secure PRNG.
3257 It can be created via `SecureRandom()`. The constructor returns nil if a secure random device cannot be
3258 be found on the system.
3261 * `next_bytes([count])`: return next `count` (default 1, capped at 2048) many random bytes, as a string.
3264 A perlin noise generator.
3265 It can be created via `PerlinNoise(seed, octaves, persistence, scale)`
3266 or `PerlinNoise(noiseparams)`.
3267 Alternatively with `minetest.get_perlin(seeddiff, octaves, persistence, scale)`
3268 or `minetest.get_perlin(noiseparams)`.
3271 * `get2d(pos)`: returns 2D noise value at `pos={x=,y=}`
3272 * `get3d(pos)`: returns 3D noise value at `pos={x=,y=,z=}`
3274 ### `PerlinNoiseMap`
3275 A fast, bulk perlin noise generator.
3277 It can be created via `PerlinNoiseMap(noiseparams, size)` or
3278 `minetest.get_perlin_map(noiseparams, size)`.
3280 Format of `size` is `{x=dimx, y=dimy, z=dimz}`. The `z` conponent is ommitted
3281 for 2D noise, and it must be must be larger than 1 for 3D noise (otherwise
3284 For each of the functions with an optional `buffer` parameter: If `buffer` is not
3285 nil, this table will be used to store the result instead of creating a new table.
3289 * `get2dMap(pos)`: returns a `<size.x>` times `<size.y>` 2D array of 2D noise
3290 with values starting at `pos={x=,y=}`
3291 * `get3dMap(pos)`: returns a `<size.x>` times `<size.y>` times `<size.z>` 3D array
3292 of 3D noise with values starting at `pos={x=,y=,z=}`
3293 * `get2dMap_flat(pos, buffer)`: returns a flat `<size.x * size.y>` element array of 2D noise
3294 with values starting at `pos={x=,y=}`
3295 * `get3dMap_flat(pos, buffer)`: Same as `get2dMap_flat`, but 3D noise
3296 * `calc2dMap(pos)`: Calculates the 2d noise map starting at `pos`. The result is stored internally.
3297 * `calc3dMap(pos)`: Calculates the 3d noise map starting at `pos`. The result is stored internally.
3298 * `getMapSlice(slice_offset, slice_size, buffer)`: In the form of an array, returns a slice of the
3299 most recently computed noise results. The result slice begins at coordinates `slice_offset` and
3300 takes a chunk of `slice_size`.
3301 E.g. to grab a 2-slice high horizontal 2d plane of noise starting at buffer offset y = 20:
3302 `noisevals = noise:getMapSlice({y=20}, {y=2})`
3303 It is important to note that `slice_offset` offset coordinates begin at 1, and are relative to
3304 the starting position of the most recently calculated noise.
3305 To grab a single vertical column of noise starting at map coordinates x = 1023, y=1000, z = 1000:
3306 `noise:calc3dMap({x=1000, y=1000, z=1000})`
3307 `noisevals = noise:getMapSlice({x=24, z=1}, {x=1, z=1})`
3311 #### About VoxelManip
3312 VoxelManip is a scripting interface to the internal 'Map Voxel Manipulator' facility. The purpose of
3313 this object is for fast, low-level, bulk access to reading and writing Map content. As such, setting
3314 map nodes through VoxelManip will lack many of the higher level features and concepts you may be used
3315 to with other methods of setting nodes. For example, nodes will not have their construction and
3316 destruction callbacks run, and no rollback information is logged.
3318 It is important to note that VoxelManip is designed for speed, and *not* ease of use or flexibility.
3319 If your mod requires a map manipulation facility that will handle 100% of all edge cases, or the use
3320 of high level node placement features, perhaps minetest.set_node() is better suited for the job.
3322 In addition, VoxelManip might not be faster, or could even be slower, for your specific use case.
3323 VoxelManip is most effective when setting very large areas of map at once - for example, if only
3324 setting a 5x5x5 node area, a minetest.set_node() loop may be more optimal. Always profile code
3325 using both methods of map manipulation to determine which is most appropriate for your usage.
3327 #### Using VoxelManip
3328 A VoxelManip object can be created any time using either:
3329 `VoxelManip([p1, p2])`, or `minetest.get_voxel_manip([p1, p2])`.
3331 If the optional position parameters are present for either of these routines, the specified region
3332 will be pre-loaded into the VoxelManip object on creation. Otherwise, the area of map you wish to
3333 manipulate must first be loaded into the VoxelManip object using `VoxelManip:read_from_map()`.
3335 Note that `VoxelManip:read_from_map()` returns two position vectors. The region formed by these
3336 positions indicate the minimum and maximum (respectively) positions of the area actually loaded in
3337 the VoxelManip, which may be larger than the area requested. For convenience, the loaded area
3338 coordinates can also be queried any time after loading map data with `VoxelManip:get_emerged_area()`.
3340 Now that the VoxelManip object is populated with map data, your mod can fetch a copy of this data
3341 using either of two methods. `VoxelManip:get_node_at()`, which retrieves an individual node in a
3342 MapNode formatted table at the position requested is the simplest method to use, but also the slowest.
3344 Nodes in a VoxelManip object may also be read in bulk to a flat array table using:
3345 `VoxelManip:get_data()` for node content (in Content ID form, see section 'Content IDs'),
3346 `VoxelManip:get_light_data()` for node light levels, and
3347 `VoxelManip:get_param2_data()` for the node type-dependent "param2" values.
3349 See section 'Flat array format' for more details.
3351 It is very important to understand that the tables returned by any of the above three functions
3352 represent a snapshot of the VoxelManip's internal state at the time of the call. This copy of the
3353 data will *not* magically update itself if another function modifies the internal VoxelManip state.
3354 Any functions that modify a VoxelManip's contents work on the VoxelManip's internal state unless
3355 otherwise explicitly stated.
3357 Once the bulk data has been edited to your liking, the internal VoxelManip state can be set using:
3358 `VoxelManip:set_data()` for node content (in Content ID form, see section 'Content IDs'),
3359 `VoxelManip:set_light_data()` for node light levels, and
3360 `VoxelManip:set_param2_data()` for the node type-dependent "param2" values.
3362 The parameter to each of the above three functions can use any table at all in the same flat array
3363 format as produced by get_data() et al. and is *not required* to be a table retrieved from get_data().
3365 Once the internal VoxelManip state has been modified to your liking, the changes can be committed back
3366 to the map by calling `VoxelManip:write_to_map()`.
3369 ##### Flat array format
3371 `Nx = p2.X - p1.X + 1`,
3372 `Ny = p2.Y - p1.Y + 1`, and
3373 `Nz = p2.Z - p1.Z + 1`.
3375 Then, for a loaded region of p1..p2, this array ranges from `1` up to and including the value of
3376 the expression `Nx * Ny * Nz`.
3378 Positions offset from p1 are present in the array with the format of:
3381 (0, 0, 0), (1, 0, 0), (2, 0, 0), ... (Nx, 0, 0),
3382 (0, 1, 0), (1, 1, 0), (2, 1, 0), ... (Nx, 1, 0),
3384 (0, Ny, 0), (1, Ny, 0), (2, Ny, 0), ... (Nx, Ny, 0),
3385 (0, 0, 1), (1, 0, 1), (2, 0, 1), ... (Nx, 0, 1),
3387 (0, Ny, 2), (1, Ny, 2), (2, Ny, 2), ... (Nx, Ny, 2),
3389 (0, Ny, Nz), (1, Ny, Nz), (2, Ny, Nz), ... (Nx, Ny, Nz)
3393 and the array index for a position p contained completely in p1..p2 is:
3395 `(p.Z - p1.Z) * Ny * Nx + (p.Y - p1.Y) * Nx + (p.X - p1.X) + 1`
3397 Note that this is the same "flat 3D array" format as `PerlinNoiseMap:get3dMap_flat()`.
3398 VoxelArea objects (see section 'VoxelArea') can be used to simplify calculation of the index
3399 for a single point in a flat VoxelManip array.
3402 A Content ID is a unique integer identifier for a specific node type. These IDs are used by VoxelManip
3403 in place of the node name string for `VoxelManip:get_data()` and `VoxelManip:set_data()`. You can use
3404 `minetest.get_content_id()` to look up the Content ID for the specified node name, and
3405 `minetest.get_name_from_content_id()` to look up the node name string for a given Content ID.
3406 After registration of a node, its Content ID will remain the same throughout execution of the mod.
3407 Note that the node being queried needs to have already been been registered.
3409 The following builtin node types have their Content IDs defined as constants:
3411 core.CONTENT_UNKNOWN (ID for "unknown" nodes)
3412 core.CONTENT_AIR (ID for "air" nodes)
3413 core.CONTENT_IGNORE (ID for "ignore" nodes)
3416 ##### Mapgen VoxelManip objects
3417 Inside of `on_generated()` callbacks, it is possible to retrieve the same VoxelManip object used by the
3418 core's Map Generator (commonly abbreviated Mapgen). Most of the rules previously described still apply
3419 but with a few differences:
3421 * The Mapgen VoxelManip object is retrieved using: `minetest.get_mapgen_object("voxelmanip")`
3422 * This VoxelManip object already has the region of map just generated loaded into it; it's not necessary
3423 to call `VoxelManip:read_from_map()` before using a Mapgen VoxelManip.
3424 * The `on_generated()` callbacks of some mods may place individual nodes in the generated area using
3425 non-VoxelManip map modification methods. Because the same Mapgen VoxelManip object is passed through
3426 each `on_generated()` callback, it becomes necessary for the Mapgen VoxelManip object to maintain
3427 consistency with the current map state. For this reason, calling any of the following functions:
3428 `minetest.add_node()`, `minetest.set_node()`, or `minetest.swap_node()`
3429 will also update the Mapgen VoxelManip object's internal state active on the current thread.
3430 * After modifying the Mapgen VoxelManip object's internal buffer, it may be necessary to update lighting
3431 information using either: `VoxelManip:calc_lighting()` or `VoxelManip:set_lighting()`.
3433 ##### Other API functions operating on a VoxelManip
3434 If any VoxelManip contents were set to a liquid node, `VoxelManip:update_liquids()` must be called
3435 for these liquid nodes to begin flowing. It is recommended to call this function only after having
3436 written all buffered data back to the VoxelManip object, save for special situations where the modder
3437 desires to only have certain liquid nodes begin flowing.
3439 The functions `minetest.generate_ores()` and `minetest.generate_decorations()` will generate all
3440 registered decorations and ores throughout the full area inside of the specified VoxelManip object.
3442 `minetest.place_schematic_on_vmanip()` is otherwise identical to `minetest.place_schematic()`,
3443 except instead of placing the specified schematic directly on the map at the specified position, it
3444 will place the schematic inside of the VoxelManip.
3447 * Attempting to read data from a VoxelManip object before map is read will result in a zero-length
3448 array table for `VoxelManip:get_data()`, and an "ignore" node at any position for
3449 `VoxelManip:get_node_at()`.
3450 * If either a region of map has not yet been generated or is out-of-bounds of the map, that region is
3451 filled with "ignore" nodes.
3452 * Other mods, or the core itself, could possibly modify the area of map currently loaded into a VoxelManip
3453 object. With the exception of Mapgen VoxelManips (see above section), the internal buffers are not
3454 updated. For this reason, it is strongly encouraged to complete the usage of a particular VoxelManip
3455 object in the same callback it had been created.
3456 * If a VoxelManip object will be used often, such as in an `on_generated()` callback, consider passing
3457 a file-scoped table as the optional parameter to `VoxelManip:get_data()`, which serves as a static
3458 buffer the function can use to write map data to instead of returning a new table each call. This
3459 greatly enhances performance by avoiding unnecessary memory allocations.
3462 * `read_from_map(p1, p2)`: Loads a chunk of map into the VoxelManip object containing
3463 the region formed by `p1` and `p2`.
3464 * returns actual emerged `pmin`, actual emerged `pmax`
3465 * `write_to_map([light])`: Writes the data loaded from the `VoxelManip` back to the map.
3466 * **important**: data must be set using `VoxelManip:set_data()` before calling this
3467 * if `light` is true, then lighting is automatically recalculated.
3468 The default value is true.
3469 If `light` is false, no light calculations happen, and you should correct
3470 all modified blocks with `minetest.fix_light()` as soon as possible.
3471 Keep in mind that modifying the map where light is incorrect can cause
3473 * `get_node_at(pos)`: Returns a `MapNode` table of the node currently loaded in
3474 the `VoxelManip` at that position
3475 * `set_node_at(pos, node)`: Sets a specific `MapNode` in the `VoxelManip` at that position
3476 * `get_data([buffer])`: Retrieves the node content data loaded into the `VoxelManip` object
3477 * returns raw node data in the form of an array of node content IDs
3478 * if the param `buffer` is present, this table will be used to store the result instead
3479 * `set_data(data)`: Sets the data contents of the `VoxelManip` object
3480 * `update_map()`: Does nothing, kept for compatibility.
3481 * `set_lighting(light, [p1, p2])`: Set the lighting within the `VoxelManip` to a uniform value
3482 * `light` is a table, `{day=<0...15>, night=<0...15>}`
3483 * To be used only by a `VoxelManip` object from `minetest.get_mapgen_object`
3484 * (`p1`, `p2`) is the area in which lighting is set;
3485 defaults to the whole area if left out
3486 * `get_light_data()`: Gets the light data read into the `VoxelManip` object
3487 * Returns an array (indices 1 to volume) of integers ranging from `0` to `255`
3488 * Each value is the bitwise combination of day and night light values (`0` to `15` each)
3489 * `light = day + (night * 16)`
3490 * `set_light_data(light_data)`: Sets the `param1` (light) contents of each node
3492 * expects lighting data in the same format that `get_light_data()` returns
3493 * `get_param2_data([buffer])`: Gets the raw `param2` data read into the `VoxelManip` object
3494 * Returns an array (indices 1 to volume) of integers ranging from `0` to `255`
3495 * If the param `buffer` is present, this table will be used to store the result instead
3496 * `set_param2_data(param2_data)`: Sets the `param2` contents of each node in the `VoxelManip`
3497 * `calc_lighting([p1, p2], [propagate_shadow])`: Calculate lighting within the `VoxelManip`
3498 * To be used only by a `VoxelManip` object from `minetest.get_mapgen_object`
3499 * (`p1`, `p2`) is the area in which lighting is set; defaults to the whole area
3501 * `propagate_shadow` is an optional boolean deciding whether shadows in a generated
3502 mapchunk above are propagated down into the mapchunk; defaults to `true` if left out
3503 * `update_liquids()`: Update liquid flow
3504 * `was_modified()`: Returns `true` or `false` if the data in the voxel manipulator
3505 had been modified since the last read from map, due to a call to
3506 `minetest.set_data()` on the loaded area elsewhere
3507 * `get_emerged_area()`: Returns actual emerged minimum and maximum positions.
3510 A helper class for voxel areas.
3511 It can be created via `VoxelArea:new{MinEdge=pmin, MaxEdge=pmax}`.
3512 The coordinates are *inclusive*, like most other things in Minetest.
3515 * `getExtent()`: returns a 3D vector containing the size of the area formed by
3516 `MinEdge` and `MaxEdge`
3517 * `getVolume()`: returns the volume of the area formed by `MinEdge` and `MaxEdge`
3518 * `index(x, y, z)`: returns the index of an absolute position in a flat array starting at `1`
3519 * useful for things like `VoxelManip`, raw Schematic specifiers,
3520 `PerlinNoiseMap:get2d`/`3dMap`, and so on
3521 * `indexp(p)`: same as above, except takes a vector
3522 * `position(i)`: returns the absolute position vector corresponding to index `i`
3523 * `contains(x, y, z)`: check if (`x`,`y`,`z`) is inside area formed by `MinEdge` and `MaxEdge`
3524 * `containsp(p)`: same as above, except takes a vector
3525 * `containsi(i)`: same as above, except takes an index `i`
3526 * `iter(minx, miny, minz, maxx, maxy, maxz)`: returns an iterator that returns indices
3527 * from (`minx`,`miny`,`minz`) to (`maxx`,`maxy`,`maxz`) in the order of `[z [y [x]]]`
3528 * `iterp(minp, maxp)`: same as above, except takes a vector
3531 An interface to read config files in the format of `minetest.conf`.
3533 It can be created via `Settings(filename)`.
3536 * `get(key)`: returns a value
3537 * `get_bool(key)`: returns a boolean
3539 * `remove(key)`: returns a boolean (`true` for success)
3540 * `get_names()`: returns `{key1,...}`
3541 * `write()`: returns a boolean (`true` for success)
3542 * write changes to file
3543 * `to_table()`: returns `{[key1]=value1,...}`
3547 A mapgen object is a construct used in map generation. Mapgen objects can be used
3548 by an `on_generate` callback to speed up operations by avoiding unnecessary
3549 recalculations; these can be retrieved using the `minetest.get_mapgen_object()`
3550 function. If the requested Mapgen object is unavailable, or `get_mapgen_object()`
3551 was called outside of an `on_generate()` callback, `nil` is returned.
3553 The following Mapgen objects are currently available:
3556 This returns three values; the `VoxelManip` object to be used, minimum and maximum
3557 emerged position, in that order. All mapgens support this object.
3560 Returns an array containing the y coordinates of the ground levels of nodes in
3561 the most recently generated chunk by the current mapgen.
3564 Returns an array containing the biome IDs of nodes in the most recently
3565 generated chunk by the current mapgen.
3568 Returns an array containing the temperature values of nodes in the most
3569 recently generated chunk by the current mapgen.
3572 Returns an array containing the humidity values of nodes in the most recently
3573 generated chunk by the current mapgen.
3576 Returns a table mapping requested generation notification types to arrays of
3577 positions at which the corresponding generated structures are located at within
3578 the current chunk. To set the capture of positions of interest to be recorded
3579 on generate, use `minetest.set_gen_notify()`.
3581 Possible fields of the table returned are:
3587 * `large_cave_begin`
3591 Decorations have a key in the format of `"decoration#id"`, where `id` is the
3592 numeric unique decoration ID.
3596 * Functions receive a "luaentity" as `self`:
3597 * It has the member `.name`, which is the registered name `("mod:thing")`
3598 * It has the member `.object`, which is an `ObjectRef` pointing to the object
3599 * The original prototype stuff is visible directly via a metatable
3601 * `on_activate(self, staticdata, dtime_s)`
3602 * Called when the object is instantiated.
3603 * `dtime_s` is the time passed since the object was unloaded, which can
3604 be used for updating the entity state.
3605 * `on_step(self, dtime)`
3606 * Called on every server tick, after movement and collision processing.
3607 `dtime` is usually 0.1 seconds, as per the `dedicated_server_step` setting
3609 * `on_punch(self, puncher, time_from_last_punch, tool_capabilities, dir)`
3610 * Called when somebody punches the object.
3611 * Note that you probably want to handle most punches using the
3612 automatic armor group system.
3613 * `puncher`: an `ObjectRef` (can be `nil`)
3614 * `time_from_last_punch`: Meant for disallowing spamming of clicks (can be `nil`)
3615 * `tool_capabilities`: capability table of used tool (can be `nil`)
3616 * `dir`: unit vector of direction of punch. Always defined. Points from
3617 the puncher to the punched.
3618 * `on_rightclick(self, clicker)`
3619 * `get_staticdata(self)`
3620 * Should return a string that will be passed to `on_activate` when
3621 the object is instantiated the next time.
3626 L-system generation currently creates lighting bugs in the form of mapblock-sized shadows.
3627 Often these bugs appear as subtle shadows in water.
3632 axiom, --string initial tree axiom
3633 rules_a, --string rules set A
3634 rules_b, --string rules set B
3635 rules_c, --string rules set C
3636 rules_d, --string rules set D
3637 trunk, --string trunk node name
3638 leaves, --string leaves node name
3639 leaves2, --string secondary leaves node name
3640 leaves2_chance,--num chance (0-100) to replace leaves with leaves2
3641 angle, --num angle in deg
3642 iterations, --num max # of iterations, usually 2 -5
3643 random_level, --num factor to lower nr of iterations, usually 0 - 3
3644 trunk_type, --string single/double/crossed) type of trunk: 1 node,
3645 -- 2x2 nodes or 3x3 in cross shape
3646 thin_branches, --boolean true -> use thin (1 node) branches
3647 fruit, --string fruit node name
3648 fruit_chance, --num chance (0-100) to replace leaves with fruit node
3649 seed, --num random seed; if no seed is provided, the engine will create one
3652 ### Key for Special L-System Symbols used in Axioms
3654 * `G`: move forward one unit with the pen up
3655 * `F`: move forward one unit with the pen down drawing trunks and branches
3656 * `f`: move forward one unit with the pen down drawing leaves (100% chance)
3657 * `T`: move forward one unit with the pen down drawing trunks only
3658 * `R`: move forward one unit with the pen down placing fruit
3659 * `A`: replace with rules set A
3660 * `B`: replace with rules set B
3661 * `C`: replace with rules set C
3662 * `D`: replace with rules set D
3663 * `a`: replace with rules set A, chance 90%
3664 * `b`: replace with rules set B, chance 80%
3665 * `c`: replace with rules set C, chance 70%
3666 * `d`: replace with rules set D, chance 60%
3667 * `+`: yaw the turtle right by `angle` parameter
3668 * `-`: yaw the turtle left by `angle` parameter
3669 * `&`: pitch the turtle down by `angle` parameter
3670 * `^`: pitch the turtle up by `angle` parameter
3671 * `/`: roll the turtle to the right by `angle` parameter
3672 * `*`: roll the turtle to the left by `angle` parameter
3673 * `[`: save in stack current state info
3674 * `]`: recover from stack state info
3677 Spawn a small apple tree:
3679 pos = {x=230,y=20,z=4}
3682 rules_a="[&&&FFFFF&&FFFF][&&&++++FFFFF&&FFFF][&&&----FFFFF&&FFFF]",
3683 rules_b="[&&&++FFFFF&&FFFF][&&&--FFFFF&&FFFF][&&&------FFFFF&&FFFF]",
3684 trunk="default:tree",
3685 leaves="default:leaves",
3689 trunk_type="single",
3692 fruit="default:apple"
3694 minetest.spawn_tree(pos,apple_tree)
3699 ### Object Properties
3704 collide_with_objects = true, -- collide with other objects if physical=true
3706 collisionbox = {-0.5,-0.5,-0.5, 0.5,0.5,0.5},
3707 visual = "cube"/"sprite"/"upright_sprite"/"mesh"/"wielditem",
3708 visual_size = {x=1, y=1},
3710 textures = {}, -- number of required textures depends on visual
3711 colors = {}, -- number of required colors depends on visual
3712 spritediv = {x=1, y=1},
3713 initial_sprite_basepos = {x=0, y=0},
3715 makes_footstep_sound = false,
3716 automatic_rotate = false,
3718 automatic_face_movement_dir = 0.0,
3719 -- ^ automatically set yaw to movement direction; offset in degrees; false to disable
3720 automatic_face_movement_max_rotation_per_sec = -1,
3721 -- ^ limit automatic rotation to this value in degrees per second. values < 0 no limit
3722 backface_culling = true, -- false to disable backface_culling for model
3723 nametag = "", -- by default empty, for players their name is shown if empty
3724 nametag_color = <color>, -- sets color of nametag as ColorSpec
3725 infotext = "", -- by default empty, text to be shown when pointed at object
3728 ### Entity definition (`register_entity`)
3731 -- Deprecated: Everything in object properties is read directly from here
3733 initial_properties = --[[<initial object properties>]],
3735 on_activate = function(self, staticdata, dtime_s),
3736 on_step = function(self, dtime),
3737 on_punch = function(self, puncher, time_from_last_punch, tool_capabilities, dir),
3738 on_rightclick = function(self, clicker),
3739 get_staticdata = function(self),
3740 -- ^ Called sometimes; the string returned is passed to on_activate when
3741 -- the entity is re-activated from static state
3743 -- Also you can define arbitrary member variables here (see item definition for
3745 _custom_field = whatever,
3748 ### ABM (ActiveBlockModifier) definition (`register_abm`)
3751 label = "Lava cooling",
3752 -- ^ Descriptive label for profiling purposes (optional).
3753 -- Definitions with identical labels will be listed as one.
3754 -- In the following two fields, also group:groupname will work.
3755 nodenames = {"default:lava_source"},
3756 neighbors = {"default:water_source", "default:water_flowing"}, -- Any of these --[[
3757 ^ If left out or empty, any neighbor will do ]]
3758 interval = 1.0, -- Operation interval in seconds
3759 chance = 1, -- Chance of trigger per-node per-interval is 1.0 / this
3760 catch_up = true, -- If true, catch-up behaviour is enabled --[[
3761 ^ The chance value is temporarily reduced when returning to
3762 an area to simulate time lost by the area being unattended.
3763 ^ Note chance value can often be reduced to 1 ]]
3764 action = func(pos, node, active_object_count, active_object_count_wider),
3767 ### LBM (LoadingBlockModifier) definition (`register_lbm`)
3770 label = "Upgrade legacy doors",
3771 -- ^ Descriptive label for profiling purposes (optional).
3772 -- Definitions with identical labels will be listed as one.
3773 name = "modname:replace_legacy_door",
3774 nodenames = {"default:lava_source"},
3775 -- ^ List of node names to trigger the LBM on.
3776 -- Also non-registered nodes will work.
3777 -- Groups (as of group:groupname) will work as well.
3778 run_at_every_load = false,
3779 -- ^ Whether to run the LBM's action every time a block gets loaded,
3780 -- and not just for blocks that were saved last time before LBMs were
3781 -- introduced to the world.
3782 action = func(pos, node),
3785 ### Item definition (`register_node`, `register_craftitem`, `register_tool`)
3788 description = "Steel Axe",
3789 groups = {}, -- key = name, value = rating; rating = 1..3.
3790 if rating not applicable, use 1.
3791 e.g. {wool = 1, fluffy = 3}
3792 {soil = 2, outerspace = 1, crumbly = 1}
3793 {bendy = 2, snappy = 1},
3794 {hard = 1, metal = 1, spikes = 1}
3795 inventory_image = "default_tool_steelaxe.png",
3799 ^ An image file containing the palette of a node.
3800 ^ You can set the currently used color as the
3801 ^ "palette_index" field of the item stack metadata.
3802 ^ The palette is always stretched to fit indices
3803 ^ between 0 and 255, to ensure compatibility with
3804 ^ "colorfacedir" and "colorwallmounted" nodes.
3806 color = "0xFFFFFFFF",
3808 ^ The color of the item. The palette overrides this.
3810 wield_scale = {x = 1, y = 1, z = 1},
3813 liquids_pointable = false,
3814 tool_capabilities = {
3815 full_punch_interval = 1.0,
3819 choppy = {times = {[1] = 2.50, [2] = 1.40, [3] = 1.00}, uses = 20, maxlevel = 2},
3821 damage_groups = {groupname = damage},
3823 node_placement_prediction = nil,
3825 ^ If nil and item is node, prediction is made automatically
3826 ^ If nil and item is not a node, no prediction is made
3827 ^ If "" and item is anything, no prediction is made
3828 ^ Otherwise should be name of node which the client immediately places
3829 on ground when the player places the item. Server will always update
3830 actual result to client in a short moment.
3833 breaks = "default_tool_break", -- tools only
3834 place = --[[<SimpleSoundSpec>]],
3837 on_place = func(itemstack, placer, pointed_thing),
3839 ^ Shall place item and return the leftover itemstack
3840 ^ The placer may be any ObjectRef or nil.
3841 ^ default: minetest.item_place ]]
3842 on_secondary_use = func(itemstack, user, pointed_thing),
3844 ^ Same as on_place but called when pointing at nothing.
3845 ^ The user may be any ObjectRef or nil.
3846 ^ pointed_thing : always { type = "nothing" }
3848 on_drop = func(itemstack, dropper, pos),
3850 ^ Shall drop item and return the leftover itemstack
3851 ^ The dropper may be any ObjectRef or nil.
3852 ^ default: minetest.item_drop ]]
3853 on_use = func(itemstack, user, pointed_thing),
3856 ^ Function must return either nil if no item shall be removed from
3857 inventory, or an itemstack to replace the original itemstack.
3858 e.g. itemstack:take_item(); return itemstack
3859 ^ Otherwise, the function is free to do what it wants.
3860 ^ The user may be any ObjectRef or nil.
3861 ^ The default functions handle regular use cases.
3863 after_use = func(itemstack, user, node, digparams),
3866 ^ If defined, should return an itemstack and will be called instead of
3867 wearing out the tool. If returns nil, does nothing.
3868 If after_use doesn't exist, it is the same as:
3869 function(itemstack, user, node, digparams)
3870 itemstack:add_wear(digparams.wear)
3873 ^ The user may be any ObjectRef or nil.
3875 _custom_field = whatever,
3877 ^ Add your own custom fields. By convention, all custom field names
3878 should start with `_` to avoid naming collisions with future engine
3885 * `{name="image.png", animation={Tile Animation definition}}`
3886 * `{name="image.png", backface_culling=bool, tileable_vertical=bool,
3887 tileable_horizontal=bool}`
3888 * backface culling enabled by default for most nodes
3889 * tileable flags are info for shaders, how they should treat texture
3890 when displacement mapping is used
3891 Directions are from the point of view of the tile texture,
3892 not the node it's on
3893 * `{name="image.png", color=ColorSpec}`
3894 * the texture's color will be multiplied with this color.
3895 * the tile's color overrides the owning node's color in all cases.
3896 * deprecated, yet still supported field names:
3899 ### Tile animation definition
3902 type = "vertical_frames",
3904 -- ^ specify width of a frame in pixels
3906 -- ^ specify height of a frame in pixels
3908 -- ^ specify full loop length
3914 -- ^ specify width in number of frames
3916 -- ^ specify height in number of frames
3918 -- ^ specify length of a single frame
3921 ### Node definition (`register_node`)
3924 -- <all fields allowed in item definitions>,
3926 drawtype = "normal", -- See "Node drawtypes"
3927 visual_scale = 1.0, --[[
3928 ^ Supported for drawtypes "plantlike", "signlike", "torchlike",
3929 ^ "firelike", "mesh".
3930 ^ For plantlike and firelike, the image will start at the bottom of the
3931 ^ node, for the other drawtypes the image will be centered on the node.
3932 ^ Note that positioning for "torchlike" may still change. ]]
3933 tiles = {tile definition 1, def2, def3, def4, def5, def6}, --[[
3934 ^ Textures of node; +Y, -Y, +X, -X, +Z, -Z (old field name: tile_images)
3935 ^ List can be shortened to needed length ]]
3936 overlay_tiles = {tile definition 1, def2, def3, def4, def5, def6}, --[[
3937 ^ Same as `tiles`, but these textures are drawn on top of the
3938 ^ base tiles. You can use this to colorize only specific parts of
3939 ^ your texture. If the texture name is an empty string, that
3940 ^ overlay is not drawn. Since such tiles are drawn twice, it
3941 ^ is not recommended to use overlays on very common nodes.
3942 special_tiles = {tile definition 1, Tile definition 2}, --[[
3943 ^ Special textures of node; used rarely (old field name: special_materials)
3944 ^ List can be shortened to needed length ]]
3945 color = ColorSpec, --[[
3946 ^ The node's original color will be multiplied with this color.
3947 ^ If the node has a palette, then this setting only has an effect
3948 ^ in the inventory and on the wield item. ]]
3949 use_texture_alpha = false, -- Use texture's alpha channel
3950 palette = "palette.png", --[[
3951 ^ The node's `param2` is used to select a pixel from the image
3952 ^ (pixels are arranged from left to right and from top to bottom).
3953 ^ The node's color will be multiplied with the selected pixel's
3954 ^ color. Tiles can override this behavior.
3955 ^ Only when `paramtype2` supports palettes. ]]
3956 post_effect_color = "green#0F", -- If player is inside node, see "ColorSpec"
3957 paramtype = "none", -- See "Nodes" --[[
3958 ^ paramtype = "light" allows light to propagate from or through the node with light value
3959 ^ falling by 1 per node. This line is essential for a light source node to spread its light. ]]
3960 paramtype2 = "none", -- See "Nodes"
3961 place_param2 = nil, -- Force value for param2 when player places node
3962 is_ground_content = true, -- If false, the cave generator will not carve through this
3963 sunlight_propagates = false, -- If true, sunlight will go infinitely through this
3964 walkable = true, -- If true, objects collide with node
3965 pointable = true, -- If true, can be pointed at
3966 diggable = true, -- If false, can never be dug
3967 climbable = false, -- If true, can be climbed on (ladder)
3968 buildable_to = false, -- If true, placed nodes can replace this node
3969 floodable = false, --[[
3970 ^ If true, liquids flow into and replace this node.
3971 ^ Warning: making a liquid node 'floodable' does not work and may cause problems. ]]
3972 liquidtype = "none", -- "none"/"source"/"flowing"
3973 liquid_alternative_flowing = "", -- Flowing version of source liquid
3974 liquid_alternative_source = "", -- Source version of flowing liquid
3975 liquid_viscosity = 0, -- Higher viscosity = slower flow (max. 7)
3976 liquid_renewable = true, --[[
3977 ^ If true, a new liquid source can be created by placing two or more sources nearby ]]
3979 ^ Block contains level in param2. Value is default level, used for snow.
3980 ^ Don't forget to use "leveled" type nodebox. ]]
3981 liquid_range = 8, -- number of flowing nodes around source (max. 8)
3982 drowning = 0, -- Player will take this amount of damage if no bubbles are left
3983 light_source = 0, --[[
3984 ^ Amount of light emitted by node.
3985 ^ To set the maximum (currently 14), use the value 'minetest.LIGHT_MAX'.
3986 ^ A value outside the range 0 to minetest.LIGHT_MAX causes undefined behavior.]]
3987 damage_per_second = 0, -- If player is inside node, this damage is caused
3988 node_box = {type="regular"}, -- See "Node boxes"
3989 connects_to = nodenames, --[[
3990 * Used for nodebox nodes with the type == "connected"
3991 * Specifies to what neighboring nodes connections will be drawn
3992 * e.g. `{"group:fence", "default:wood"}` or `"default:stone"` ]]
3993 connect_sides = { "top", "bottom", "front", "left", "back", "right" }, --[[
3994 ^ Tells connected nodebox nodes to connect only to these sides of this node. ]]
3996 selection_box = {type="regular"}, -- See "Node boxes" --[[
3997 ^ If drawtype "nodebox" is used and selection_box is nil, then node_box is used. ]]
3998 legacy_facedir_simple = false, -- Support maps made in and before January 2012
3999 legacy_wallmounted = false, -- Support maps made in and before January 2012
4000 waving = 0, --[[ valid for mesh, nodebox, plantlike, allfaces_optional nodes
4001 ^ 1 - wave node like plants (top of node moves, bottom is fixed)
4002 ^ 2 - wave node like leaves (whole node moves side-to-side synchronously)
4003 ^ caveats: not all models will properly wave
4004 ^ plantlike drawtype nodes can only wave like plants
4005 ^ allfaces_optional drawtype nodes can only wave like leaves --]]
4007 footstep = <SimpleSoundSpec>,
4008 dig = <SimpleSoundSpec>, -- "__group" = group-based sound (default)
4009 dug = <SimpleSoundSpec>,
4010 place = <SimpleSoundSpec>,
4011 place_failed = <SimpleSoundSpec>,
4013 drop = "", -- Name of dropped node when dug. Default is the node itself.
4016 max_items = 1, -- Maximum number of items to drop.
4017 items = { -- Choose max_items randomly from this list.
4019 items = {"foo:bar", "baz:frob"}, -- Items to drop.
4020 rarity = 1, -- Probability of dropping is 1 / rarity.
4025 on_construct = func(pos), --[[
4026 ^ Node constructor; called after adding node
4027 ^ Can set up metadata and stuff like that
4028 ^ Not called for bulk node placement (i.e. schematics and VoxelManip)
4030 on_destruct = func(pos), --[[
4031 ^ Node destructor; called before removing node
4032 ^ Not called for bulk node placement (i.e. schematics and VoxelManip)
4034 after_destruct = func(pos, oldnode), --[[
4035 ^ Node destructor; called after removing node
4036 ^ Not called for bulk node placement (i.e. schematics and VoxelManip)
4038 on_flood = func(pos, oldnode, newnode), --[[
4039 ^ Called when a liquid (newnode) is about to flood oldnode, if
4040 ^ it has `floodable = true` in the nodedef. Not called for bulk
4041 ^ node placement (i.e. schematics and VoxelManip) or air nodes. If
4042 ^ return true the node is not flooded, but on_flood callback will
4043 ^ most likely be called over and over again every liquid update
4044 ^ interval. Default: nil.
4045 ^ Warning: making a liquid node 'floodable' does not work and may cause problems. ]]
4047 after_place_node = func(pos, placer, itemstack, pointed_thing) --[[
4048 ^ Called after constructing node when node was placed using
4049 minetest.item_place_node / minetest.place_node
4050 ^ If return true no item is taken from itemstack
4052 after_dig_node = func(pos, oldnode, oldmetadata, digger), --[[
4053 ^ oldmetadata is in table format
4054 ^ Called after destructing node when node was dug using
4055 minetest.node_dig / minetest.dig_node
4057 can_dig = function(pos, [player]) --[[
4058 ^ returns true if node can be dug, or false if not
4061 on_punch = func(pos, node, puncher, pointed_thing), --[[
4062 ^ default: minetest.node_punch
4063 ^ By default: Calls minetest.register_on_punchnode callbacks ]]
4064 on_rightclick = func(pos, node, clicker, itemstack, pointed_thing), --[[
4066 ^ if defined, itemstack will hold clicker's wielded item
4067 ^ Shall return the leftover itemstack
4068 ^ Note: pointed_thing can be nil, if a mod calls this function ]]
4070 on_dig = func(pos, node, digger), --[[
4071 ^ default: minetest.node_dig
4072 ^ By default: checks privileges, wears out tool and removes node ]]
4074 on_timer = function(pos,elapsed), --[[
4076 ^ called by NodeTimers, see minetest.get_node_timer and NodeTimerRef
4077 ^ elapsed is the total time passed since the timer was started
4078 ^ return true to run the timer for another cycle with the same timeout value ]]
4080 on_receive_fields = func(pos, formname, fields, sender), --[[
4081 ^ fields = {name1 = value1, name2 = value2, ...}
4082 ^ Called when an UI form (e.g. sign text input) returns data
4085 allow_metadata_inventory_move = func(pos, from_list, from_index,
4086 to_list, to_index, count, player), --[[
4087 ^ Called when a player wants to move items inside the inventory
4088 ^ Return value: number of items allowed to move ]]
4090 allow_metadata_inventory_put = func(pos, listname, index, stack, player), --[[
4091 ^ Called when a player wants to put something into the inventory
4092 ^ Return value: number of items allowed to put
4093 ^ Return value: -1: Allow and don't modify item count in inventory ]]
4095 allow_metadata_inventory_take = func(pos, listname, index, stack, player), --[[
4096 ^ Called when a player wants to take something out of the inventory
4097 ^ Return value: number of items allowed to take
4098 ^ Return value: -1: Allow and don't modify item count in inventory ]]
4100 on_metadata_inventory_move = func(pos, from_list, from_index,
4101 to_list, to_index, count, player),
4102 on_metadata_inventory_put = func(pos, listname, index, stack, player),
4103 on_metadata_inventory_take = func(pos, listname, index, stack, player), --[[
4104 ^ Called after the actual action has happened, according to what was allowed.
4105 ^ No return value ]]
4107 on_blast = func(pos, intensity), --[[
4108 ^ intensity: 1.0 = mid range of regular TNT
4109 ^ If defined, called when an explosion touches the node, instead of
4110 removing the node ]]
4113 ### Recipe for `register_craft` (shaped)
4116 output = 'default:pick_stone',
4118 {'default:cobble', 'default:cobble', 'default:cobble'},
4119 {'', 'default:stick', ''},
4120 {'', 'default:stick', ''}, -- Also groups; e.g. 'group:crumbly'
4122 replacements = --[[<optional list of item pairs,
4123 replace one input item with another item on crafting>]]
4126 ### Recipe for `register_craft` (shapeless)
4130 output = 'mushrooms:mushroom_stew',
4133 "mushrooms:mushroom_brown",
4134 "mushrooms:mushroom_red",
4136 replacements = --[[<optional list of item pairs,
4137 replace one input item with another item on crafting>]]
4140 ### Recipe for `register_craft` (tool repair)
4143 type = "toolrepair",
4144 additional_wear = -0.02,
4147 ### Recipe for `register_craft` (cooking)
4151 output = "default:glass",
4152 recipe = "default:sand",
4156 ### Recipe for `register_craft` (furnace fuel)
4160 recipe = "default:leaves",
4164 ### Ore definition (`register_ore`)
4167 ore_type = "scatter", -- See "Ore types"
4168 ore = "default:stone_with_coal",
4169 wherein = "default:stone",
4170 -- ^ a list of nodenames is supported too
4171 clust_scarcity = 8*8*8,
4172 -- ^ Ore has a 1 out of clust_scarcity chance of spawning in a node
4173 -- ^ This value should be *MUCH* higher than your intuition might tell you!
4175 -- ^ Number of ores in a cluster
4177 -- ^ Size of the bounding box of the cluster
4178 -- ^ In this example, there is a 3x3x3 cluster where 8 out of the 27 nodes are coal ore
4182 -- ^ Attributes for this ore generation
4183 noise_threshold = 0.5,
4184 -- ^ If noise is above this threshold, ore is placed. Not needed for a uniform distribution
4185 noise_params = {offset=0, scale=1, spread={x=100, y=100, z=100}, seed=23, octaves=3, persist=0.70}
4186 -- ^ NoiseParams structure describing the perlin noise used for ore distribution.
4187 -- ^ Needed for sheet ore_type. Omit from scatter ore_type for a uniform ore distribution
4188 random_factor = 1.0,
4189 -- ^ Multiplier of the randomness contribution to the noise value at any
4190 -- given point to decide if ore should be placed. Set to 0 for solid veins.
4191 -- ^ This parameter is only valid for ore_type == "vein".
4192 biomes = {"desert", "rainforest"}
4193 -- ^ List of biomes in which this decoration occurs. Occurs in all biomes if this is omitted,
4194 -- ^ and ignored if the Mapgen being used does not support biomes.
4195 -- ^ Can be a list of (or a single) biome names, IDs, or definitions.
4198 ### Biome definition (`register_biome`)
4201 The Biome API is still in an experimental phase and subject to change.
4205 node_dust = "default:snow",
4206 -- ^ Node dropped onto upper surface after all else is generated.
4207 node_top = "default:dirt_with_snow",
4209 -- ^ Node forming surface layer of biome and thickness of this layer.
4210 node_filler = "default:permafrost",
4212 -- ^ Node forming lower layer of biome and thickness of this layer.
4213 node_stone = "default:bluestone",
4214 -- ^ Node that replaces all stone nodes between roughly y_min and y_max.
4215 node_water_top = "default:ice",
4216 depth_water_top = 10,
4217 -- ^ Node forming a surface layer in seawater with the defined thickness.
4219 -- ^ Node that replaces all seawater nodes not in the defined surface layer.
4220 node_river_water = "default:ice",
4221 -- ^ Node that replaces river water in mapgens that use default:river_water.
4222 node_riverbed = "default:gravel",
4224 -- ^ Node placed under river water and thickness of this layer.
4227 -- ^ Lower and upper limits for biome.
4228 -- ^ Because biome is not recalculated for every node in a node column
4229 -- ^ some biome materials can exceed their limits, especially stone.
4230 -- ^ For each node column in a mapchunk, biome is only recalculated at column
4231 -- ^ top and at each of these surfaces:
4232 -- ^ Ground below air, water below air, ground below water.
4233 -- ^ The selected biome then stays in effect for all nodes below until
4234 -- ^ column base or the next biome recalculation.
4236 humidity_point = 50,
4237 -- ^ Characteristic average temperature and humidity for the biome.
4238 -- ^ These values create 'biome points' on a voronoi diagram that has heat
4239 -- ^ and humidity as axes. The resulting voronoi cells determine which
4240 -- ^ heat/humidity points belong to which biome, and therefore determine
4241 -- ^ the area and location of each biome in the world.
4242 -- ^ The biome points need to be carefully and evenly spaced on the voronoi
4243 -- ^ diagram to result in roughly equal size biomes.
4244 -- ^ Heat and humidity have average values of 50, vary mostly between
4245 -- ^ 0 and 100 but also often exceed these values.
4246 -- ^ Heat is not in degrees celcius, both values are abstract.
4249 ### Decoration definition (`register_decoration`)
4252 deco_type = "simple", -- See "Decoration types"
4253 place_on = "default:dirt_with_grass",
4254 -- ^ Node (or list of nodes) that the decoration can be placed on
4256 -- ^ Size of divisions made in the chunk being generated.
4257 -- ^ If the chunk size is not evenly divisible by sidelen, sidelen is made equal to the chunk size.
4259 -- ^ Ratio of the area to be uniformly filled by the decoration.
4260 -- ^ Used only if noise_params is not specified.
4261 noise_params = {offset=0, scale=.45, spread={x=100, y=100, z=100}, seed=354, octaves=3, persist=0.7},
4262 -- ^ NoiseParams structure describing the perlin noise used for decoration distribution.
4263 -- ^ The result of this is multiplied by the 2d area of the division being decorated.
4264 biomes = {"Oceanside", "Hills", "Plains"},
4265 -- ^ List of biomes in which this decoration occurs. Occurs in all biomes if this is omitted,
4266 -- ^ and ignored if the Mapgen being used does not support biomes.
4267 -- ^ Can be a list of (or a single) biome names, IDs, or definitions.
4270 -- ^ Minimum and maximum `y` positions these decorations can be generated at.
4271 -- ^ This parameter refers to the `y` position of the decoration base, so
4272 -- the actual maximum height would be `height_max + size.Y`.
4273 spawn_by = "default:water",
4274 -- ^ Node (or list of nodes) that the decoration only spawns next to.
4275 -- ^ Checks two horizontal planes of neighbouring nodes (including diagonal neighbours),
4276 -- ^ one plane at Y = surface and one plane at Y = surface = + 1.
4278 -- ^ Number of spawn_by nodes that must be surrounding the decoration position to occur.
4279 -- ^ If absent or -1, decorations occur next to any nodes.
4280 flags = "liquid_surface, force_placement",
4281 -- ^ Flags for all decoration types.
4282 -- ^ "liquid_surface": Instead of placement on the highest solid surface
4283 -- ^ in a mapchunk column, placement is on the highest liquid surface.
4284 -- ^ Placement is disabled if solid nodes are found above the liquid surface.
4285 -- ^ "force_placement": Nodes other than "air" and "ignore" are replaced by the decoration.
4287 ----- Simple-type parameters
4288 decoration = "default:grass",
4289 -- ^ The node name used as the decoration.
4290 -- ^ If instead a list of strings, a randomly selected node from the list is placed as the decoration.
4292 -- ^ Number of nodes high the decoration is made.
4293 -- ^ If height_max is not 0, this is the lower bound of the randomly selected height.
4295 -- ^ Number of nodes the decoration can be at maximum.
4296 -- ^ If absent, the parameter 'height' is used as a constant.
4298 -- ^ Param2 value of placed decoration node.
4300 ----- Schematic-type parameters
4301 schematic = "foobar.mts",
4302 -- ^ If schematic is a string, it is the filepath relative to the current working directory of the
4303 -- ^ specified Minetest schematic file.
4304 -- ^ - OR -, could be the ID of a previously registered schematic
4305 -- ^ - OR -, could instead be a table containing two mandatory fields, size and data,
4306 -- ^ and an optional table yslice_prob:
4308 size = {x=4, y=6, z=4},
4310 {name="default:cobble", param1=255, param2=0},
4311 {name="default:dirt_with_grass", param1=255, param2=0},
4312 {name="ignore", param1=255, param2=0},
4313 {name="air", param1=255, param2=0},
4322 -- ^ See 'Schematic specifier' for details.
4323 replacements = {["oldname"] = "convert_to", ...},
4324 flags = "place_center_x, place_center_y, place_center_z",
4325 -- ^ Flags for schematic decorations. See 'Schematic attributes'.
4326 rotation = "90" -- rotate schematic 90 degrees on placement
4327 -- ^ Rotation can be "0", "90", "180", "270", or "random".
4330 ### Chat command definition (`register_chatcommand`)
4333 params = "<name> <privilege>", -- Short parameter description
4334 description = "Remove privilege from player", -- Full description
4335 privs = {privs=true}, -- Require the "privs" privilege to run
4336 func = function(name, param), -- Called when command is run.
4337 -- Returns boolean success and text output.
4340 ### Detached inventory callbacks
4343 allow_move = func(inv, from_list, from_index, to_list, to_index, count, player),
4344 -- ^ Called when a player wants to move items inside the inventory
4345 -- ^ Return value: number of items allowed to move
4347 allow_put = func(inv, listname, index, stack, player),
4348 -- ^ Called when a player wants to put something into the inventory
4349 -- ^ Return value: number of items allowed to put
4350 -- ^ Return value: -1: Allow and don't modify item count in inventory
4352 allow_take = func(inv, listname, index, stack, player),
4353 -- ^ Called when a player wants to take something out of the inventory
4354 -- ^ Return value: number of items allowed to take
4355 -- ^ Return value: -1: Allow and don't modify item count in inventory
4357 on_move = func(inv, from_list, from_index, to_list, to_index, count, player),
4358 on_put = func(inv, listname, index, stack, player),
4359 on_take = func(inv, listname, index, stack, player),
4360 -- ^ Called after the actual action has happened, according to what was allowed.
4361 -- ^ No return value
4364 ### HUD Definition (`hud_add`, `hud_get`)
4367 hud_elem_type = "image", -- see HUD element types
4368 -- ^ type of HUD element, can be either of "image", "text", "statbar", or "inventory"
4369 position = {x=0.5, y=0.5},
4370 -- ^ Left corner position of element
4376 -- ^ Selected item in inventory. 0 for no item selected.
4378 -- ^ Direction: 0: left-right, 1: right-left, 2: top-bottom, 3: bottom-top
4379 alignment = {x=0, y=0},
4380 -- ^ See "HUD Element Types"
4381 offset = {x=0, y=0},
4382 -- ^ See "HUD Element Types"
4383 size = { x=100, y=100 },
4384 -- ^ Size of element in pixels
4387 ### Particle definition (`add_particle`)
4390 pos = {x=0, y=0, z=0},
4391 velocity = {x=0, y=0, z=0},
4392 acceleration = {x=0, y=0, z=0},
4393 -- ^ Spawn particle at pos with velocity and acceleration
4395 -- ^ Disappears after expirationtime seconds
4397 collisiondetection = false,
4398 -- ^ collisiondetection: if true collides with physical objects
4399 collision_removal = false,
4400 -- ^ collision_removal: if true then particle is removed when it collides,
4401 -- ^ requires collisiondetection = true to have any effect
4403 -- ^ vertical: if true faces player using y axis only
4404 texture = "image.png",
4405 -- ^ Uses texture (string)
4406 playername = "singleplayer",
4407 -- ^ optional, if specified spawns particle only on the player's client
4408 animation = {Tile Animation definition},
4409 -- ^ optional, specifies how to animate the particle texture
4411 -- ^ optional, specify particle self-luminescence in darkness
4415 ### `ParticleSpawner` definition (`add_particlespawner`)
4420 -- ^ If time is 0 has infinite lifespan and spawns the amount on a per-second base
4421 minpos = {x=0, y=0, z=0},
4422 maxpos = {x=0, y=0, z=0},
4423 minvel = {x=0, y=0, z=0},
4424 maxvel = {x=0, y=0, z=0},
4425 minacc = {x=0, y=0, z=0},
4426 maxacc = {x=0, y=0, z=0},
4431 -- ^ The particle's properties are random values in between the bounds:
4432 -- ^ minpos/maxpos, minvel/maxvel (velocity), minacc/maxacc (acceleration),
4433 -- ^ minsize/maxsize, minexptime/maxexptime (expirationtime)
4434 collisiondetection = false,
4435 -- ^ collisiondetection: if true uses collision detection
4436 collision_removal = false,
4437 -- ^ collision_removal: if true then particle is removed when it collides,
4438 -- ^ requires collisiondetection = true to have any effect
4439 attached = ObjectRef,
4440 -- ^ attached: if defined, particle positions, velocities and accelerations
4441 -- ^ are relative to this object's position and yaw.
4443 -- ^ vertical: if true faces player using y axis only
4444 texture = "image.png",
4445 -- ^ Uses texture (string)
4446 playername = "singleplayer"
4447 -- ^ Playername is optional, if specified spawns particle only on the player's client
4450 ### `HTTPRequest` definition (`HTTPApiTable.fetch_async`, `HTTPApiTable.fetch_async`)
4453 url = "http://example.org",
4455 -- ^ Timeout for connection in seconds. Default is 3 seconds.
4456 post_data = "Raw POST request data string" OR { field1 = "data1", field2 = "data2" },
4457 -- ^ Optional, if specified a POST request with post_data is performed.
4458 -- ^ Accepts both a string and a table. If a table is specified, encodes table
4459 -- ^ as x-www-form-urlencoded key-value pairs.
4460 -- ^ If post_data ist not specified, a GET request is performed instead.
4461 user_agent = "ExampleUserAgent",
4462 -- ^ Optional, if specified replaces the default minetest user agent with given string
4463 extra_headers = { "Accept-Language: en-us", "Accept-Charset: utf-8" },
4464 -- ^ Optional, if specified adds additional headers to the HTTP request. You must make sure
4465 -- ^ that the header strings follow HTTP specification ("Key: Value").
4467 -- ^ Optional, if true performs a multipart HTTP request. Default is false.
4470 ### `HTTPRequestResult` definition (`HTTPApiTable.fetch` callback, `HTTPApiTable.fetch_async_get`)
4474 -- ^ If true, the request has finished (either succeeded, failed or timed out)
4476 -- ^ If true, the request was succesful
4478 -- ^ If true, the request timed out
4480 -- ^ HTTP status code