worldedit_brush/init.lua

   1 local modname = minetest.get_current_modname()
   2
   3 -- check compatibility
   4 if minetest.raycast == nil then
   5         function log_unavailable_error()
   6                 minetest.log("error",
   7                         "[MOD] " .. modname .. " is not compatible with current game version, " ..
   8                         "you can disable it in the game settings!"
   9                 )
  10                 minetest.log("verbose",
  11                         "[MOD] " .. modname .. " requires a suitable version of 0.4.16-dev or higher, " ..
  12                         "that includes support for minetest.raycast() [since 7th July 2017]"
  13                 )
  14         end
  15
  16         if minetest.is_singleplayer() then
  17                 -- delay message until player is connected
  18                 minetest.register_on_joinplayer(log_unavailable_error)
  19         else
  20                 log_unavailable_error()
  21         end
  22
  23         -- exit here / do not load this mod
  24         return
  25 end
  26
  27 local BRUSH_MAX_DIST = 150
  28 local BRUSH_ALLOWED_COMMANDS = {
  29         -- basically everything that only needs pos1
  30         "cube",
  31         "cylinder",
  32         "dome",
  33         "hollowcube",
  34         "hollowcylinder",
  35         "hollowdome",
  36         "hollowpyramid",
  37         "hollowsphere",
  38         "load",
  39         "pyramid",
  40         "sphere",
  41         "spiral",
  42
  43         "cyl",
  44         "do",
  45         "hcube",
  46         "hcyl",
  47         "hdo",
  48         "hpyr",
  49         "hspr",
  50         "l",
  51         "pyr",
  52         "spr",
  53         "spl",
  54 }
  55 local brush_on_use = function(itemstack, placer)
  56         local meta = itemstack:get_meta()
  57         local name = placer:get_player_name()
  58
  59         local cmd = meta:get_string("command")
  60         if cmd == "" then
  61                 worldedit.player_notify(name,
  62                         "This brush is not bound, use //brush to bind a command to it.")
  63                 return false
  64         end
  65         local cmddef = minetest.registered_chatcommands["/" .. cmd]
  66         if cmddef == nil then return false end -- shouldn't happen as //brush checks this
  67         local has_privs, missing_privs = minetest.check_player_privs(name, cmddef.privs)
  68         if not has_privs then
  69                 worldedit.player_notify(name,
  70                         "Missing privileges: " .. table.concat(missing_privs, ", "))
  71                 return false
  72         end
  73
  74         local raybegin = vector.add(placer:get_pos(), {x=0, y=2, z=0}) -- player head
  75         local rayend = vector.add(raybegin, vector.multiply(placer:get_look_dir(), BRUSH_MAX_DIST))
  76         local ray = minetest.raycast(raybegin, rayend, false, true)
  77         local pointed_thing = ray:next()
  78         if pointed_thing == nil then
  79                 worldedit.player_notify(name, "Too far away.")
  80                 return false
  81         end
  82
  83         assert(pointed_thing.type == "node")
  84         worldedit.pos1[name] = pointed_thing.under
  85         worldedit.pos2[name] = nil
  86         worldedit.mark_region(name)
  87         -- is this a horrible hack? oh yes.
  88         worldedit._override_safe_regions = true
  89         local player_notify_old = worldedit.player_notify
  90         worldedit.player_notify = function(name, msg)
  91                 if string.match(msg, "^%d") then return end -- discard "1234 nodes added."
  92                 return player_notify_old(name, msg)
  93         end
  94
  95         minetest.log("action", string.format("%s uses WorldEdit brush (//%s) at %s",
  96                 name, cmd, minetest.pos_to_string(pointed_thing.under)))
  97         cmddef.func(name, meta:get_string("params"))
  98
  99         worldedit._override_safe_regions = false
 100         worldedit.player_notify = player_notify_old
 101         return true
 102 end
 103
 104 minetest.register_tool(":worldedit:brush", {
 105         description = "WorldEdit Brush",
 106         inventory_image = "worldedit_brush.png",
 107         stack_max = 1, -- no need to stack these (metadata prevents this anyway)
 108         range = 0,
 109         on_use = function(itemstack, placer, pointed_thing)
 110                 brush_on_use(itemstack, placer)
 111                 return itemstack -- nothing consumed, nothing changed
 112         end,
 113 })
 114
 115 minetest.register_chatcommand("/brush", {
 116         privs = {worldedit=true},
 117         params = "none/<cmd> [parameters]",
 118         description = "Assign command to WorldEdit brush item",
 119         func = function(name, param)
 120                 local found, _, cmd, params = param:find("^([^%s]+)%s+(.+)$")
 121                 if not found then
 122                         params = ""
 123                         found, _, cmd = param:find("^(.+)$")
 124                 end
 125                 if not found then
 126                         worldedit.player_notify(name, "Invalid usage.")
 127                         return
 128                 end
 129
 130                 local itemstack = minetest.get_player_by_name(name):get_wielded_item()
 131                 if itemstack == nil or itemstack:get_name() ~= "worldedit:brush" then
 132                         worldedit.player_notify(name, "Not holding brush item.")
 133                         return
 134                 end
 135
 136                 cmd = cmd:lower()
 137                 local meta = itemstack:get_meta()
 138                 if cmd == "none" then
 139                         meta:from_table(nil)
 140                         worldedit.player_notify(name, "Brush assignment cleared.")
 141                 else
 142                         local cmddef
 143                         if table.indexof(BRUSH_ALLOWED_COMMANDS, cmd) ~= -1 then
 144                                 cmddef = minetest.registered_chatcommands["/" .. cmd]
 145                         else
 146                                 cmddef = nil
 147                         end
 148                         if cmddef == nil then
 149                                 worldedit.player_notify(name, "Invalid command for brush use: //" .. cmd)
 150                                 return
 151                         end
 152                         meta:set_string("command", cmd)
 153                         meta:set_string("params", params)
 154                         local fullcmd = "//" .. cmd .. " " .. params
 155                         meta:set_string("description",
 156                                 minetest.registered_tools["worldedit:brush"].description .. ": " .. fullcmd)
 157                         worldedit.player_notify(name, "Brush assigned to command: " .. fullcmd)
 158                 end
 159                 minetest.get_player_by_name(name):set_wielded_item(itemstack)
 160         end,
 161 })