Minetest-WorldEditAdditions/worldeditadditions/lib/sculpt/brushes/circle.lua

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local wea_c = worldeditadditions_core
local Vector3 = wea_c.Vector3
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---
-- @module worldeditadditions.sculpt.brushes
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--- Makes a circle brush of a given size.
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-- Default inbuilt brush.
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-- @name circle
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-- @param size Vector3 The desired sizez of the brush (only X and Y are considered; Z is ignored).
-- @returns bool,brush,Vector3 Success bool, then the brush, then finally the actual size of the brush generated.
return function(size)
local brush = {}
local centre = (size / 2):floor()
local minsize = math.floor(math.min(size.x, size.y) / 2)
for y = size.y - 1, 0, -1 do
for x = size.x - 1, 0, -1 do
local i = y*size.x + x
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if math.floor((centre - Vector3.new(x, y, 0)):length()) < minsize then
brush[i] = 1
else
brush[i] = 0
end
end
end
return true, brush, size
end