3 Copyright (C) 2010-2011 celeron55, Perttu Ahola <celeron55@gmail.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 #ifndef MAPNODE_HEADER
21 #define MAPNODE_HEADER
24 #include "irrlichttypes.h"
26 #include "exceptions.h"
27 #include "serialization.h"
34 - Material = irrlicht's Material class
35 - Content = (content_t) content of a node
36 - Tile = TileSpec at some side of a node of some content type
39 0x000...0x07f: param2 is fully usable
40 0x800...0xfff: param2 lower 4 bytes are free
42 typedef u16 content_t;
43 #define MAX_CONTENT 0xfff
48 Anything that stores MapNodes doesn't have to preserve parameters
49 associated with this material.
51 Doesn't create faces with anything and is considered being
52 out-of-map in the game map.
54 #define CONTENT_IGNORE 127
55 #define CONTENT_IGNORE_DEFAULT_PARAM 0
58 The common material through which the player can walk and which
59 is transparent to light
61 #define CONTENT_AIR 126
64 Nodes make a face if contents differ and solidness differs.
67 1: Face uses m1's content
68 2: Face uses m2's content
69 equivalent: Whether the blocks share the same face (eg. water and glass)
71 u8 face_contents(content_t m1, content_t m2, bool *equivalent);
74 Packs directions like (1,0,0), (1,-1,0) in six bits.
75 NOTE: This wastes way too much space for most purposes.
77 u8 packDir(v3s16 dir);
78 v3s16 unpackDir(u8 b);
81 facedir: CPT_FACEDIR_SIMPLE param1 value
82 dir: The face for which stuff is wanted
83 return value: The face from which the stuff is actually found
85 NOTE: Currently this uses 2 bits for Z-,X-,Z+,X+, should there be Y+
88 v3s16 facedir_rotate(u8 facedir, v3s16 dir);
97 Masks for MapNode.param2 of flowing liquids
99 #define LIQUID_LEVEL_MASK 0x07
100 #define LIQUID_FLOW_DOWN_MASK 0x08
102 /* maximum amount of liquid in a block */
103 #define LIQUID_LEVEL_MAX LIQUID_LEVEL_MASK
104 #define LIQUID_LEVEL_SOURCE (LIQUID_LEVEL_MAX+1)
107 This is the stuff what the whole world consists of.
115 0x00-0x7f: Short content type
116 0x80-0xff: Long content type (param2>>4 makes up low bytes)
121 Misc parameter. Initialized to 0.
122 - For light_propagates() blocks, this is light intensity,
123 stored logarithmically from 0 to LIGHT_MAX.
124 Sunlight is LIGHT_SUN, which is LIGHT_MAX+1.
125 - Contains 2 values, day- and night lighting. Each takes 4 bits.
126 - Mineral content (should be removed from here)
127 - Uhh... well, most blocks have light or nothing in here.
132 The second parameter. Initialized to 0.
133 E.g. direction for torches and flowing water.
134 If param0 >= 0x80, bits 0xf0 of this is extended content type data
138 MapNode(const MapNode & n)
143 MapNode(content_t content=CONTENT_AIR, u8 a_param1=0, u8 a_param2=0)
147 // Set content (param0 and (param2&0xf0)) after other params
148 // because this needs to override part of param2
152 bool operator==(const MapNode &other)
154 return (param0 == other.param0
155 && param1 == other.param1
156 && param2 == other.param2);
159 // To be used everywhere
160 content_t getContent()
165 return (param0<<4) + (param2>>4);
167 void setContent(content_t c)
179 param2 |= (c&0x0f)<<4;
184 These four are DEPRECATED I guess. -c55
186 bool light_propagates();
187 bool sunlight_propagates();
191 void setLight(enum LightBank bank, u8 a_light);
192 u8 getLight(enum LightBank bank);
193 u8 getLightBanksWithSource();
195 // 0 <= daylight_factor <= 1000
196 // 0 <= return value <= LIGHT_SUN
197 u8 getLightBlend(u32 daylight_factor)
199 u8 l = ((daylight_factor * getLight(LIGHTBANK_DAY)
200 + (1000-daylight_factor) * getLight(LIGHTBANK_NIGHT))
203 if(getLight(LIGHTBANK_DAY) == LIGHT_SUN)
209 /*// 0 <= daylight_factor <= 1000
210 // 0 <= return value <= 255
211 u8 getLightBlend(u32 daylight_factor)
213 u8 daylight = decode_light(getLight(LIGHTBANK_DAY));
214 u8 nightlight = decode_light(getLight(LIGHTBANK_NIGHT));
215 u8 mix = ((daylight_factor * daylight
216 + (1000-daylight_factor) * nightlight)
224 Get tile of a face of the node.
225 dir: direction of face
226 Returns: TileSpec. Can contain miscellaneous texture coordinates,
227 which must be obeyed so that the texture atlas can be used.
229 TileSpec getTile(v3s16 dir, ITextureSource *tsrc);
233 Gets mineral content of node, if there is any.
234 MINERAL_NONE if doesn't contain or isn't able to contain mineral.
239 Serialization functions
242 static u32 serializedLength(u8 version);
243 void serialize(u8 *dest, u8 version);
244 void deSerialize(u8 *source, u8 version);
249 Gets lighting value at face of node
251 Parameters must consist of air and !air.
252 Order doesn't matter.
254 If either of the nodes doesn't exist, light is 0.
257 daynight_ratio: 0...1000
258 n: getNode(p) (uses only the lighting value)
259 n2: getNode(p + face_dir) (uses only the lighting value)
260 face_dir: axis oriented unit vector from p to p2
262 returns encoded light value.
264 u8 getFaceLight(u32 daynight_ratio, MapNode n, MapNode n2,