Add VoxelArea() constructor (minetest#12886)

EleutherAI · Oct 22, 2022 · 8f1593e · 8f1593e
1 parent 7e11b8e
commit 8f1593e
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Showing 2 changed files with 13 additions and 3 deletions.
diff --git a/builtin/game/voxelarea.lua b/builtin/game/voxelarea.lua
@@ -8,7 +8,10 @@ VoxelArea = {
  zstride = 0,
 }
 
-function VoxelArea:new(o)
+local class_metatable = {}
+setmetatable(VoxelArea, class_metatable)
+
+local function new(self, o)
  o = o or {}
  setmetatable(o, self)
  self.__index = self
@@ -20,6 +23,12 @@ function VoxelArea:new(o)
  return o
 end
 
+function class_metatable:__call(MinEdge, MaxEdge)
+ return new(self, {MinEdge = MinEdge, MaxEdge = MaxEdge})
+end
+
+VoxelArea.new = new
+
 function VoxelArea:getExtent()
  local MaxEdge, MinEdge = self.MaxEdge, self.MinEdge
  return vector_new(

diff --git a/doc/lua_api.txt b/doc/lua_api.txt
@@ -4485,7 +4485,8 @@ Methods
 -----------
 
 A helper class for voxel areas.
-It can be created via `VoxelArea:new({MinEdge = pmin, MaxEdge = pmax})`.
+It can be created via `VoxelArea(pmin, pmax)` or
+`VoxelArea:new({MinEdge = pmin, MaxEdge = pmax})`.
 The coordinates are *inclusive*, like most other things in Minetest.
 
 ### Methods
@@ -4533,7 +4534,7 @@ the axes in a voxel area:
 
 If, for example:
 
- local area = VoxelArea:new({MinEdge = emin, MaxEdge = emax})
+ local area = VoxelArea(emin, emax)
 
 The values of `ystride` and `zstride` can be obtained using `area.ystride` and
 `area.zstride`.