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authorSfan5 <sfan5@live.de>2014-01-19 14:32:03 +0100
committerSfan5 <sfan5@live.de>2014-01-23 22:27:13 +0100
commitcd7e8372f3c83531afe5d5c2460ecb95540f9d0d (patch)
tree394e065a8c1ac8408e735180ffd9ef9bc5675722 /src/shader.cpp
parent1b5b6fe6929404ae416ac33c31df7d795d444614 (diff)
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generated by cgit v1.2.3 (git 2.39.1) at 2025-02-09 17:35:30 +0000
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VoxelArea = {
	MinEdge = {x=1, y=1, z=1},
	MaxEdge = {x=0, y=0, z=0},
	ystride = 0,
	zstride = 0,
}

function VoxelArea:new(o)
	o = o or {}
	setmetatable(o, self)
	self.__index = self

	local e = o:getExtent()
	o.ystride = e.x
	o.zstride = e.x * e.y

	return o
end

function VoxelArea:getExtent()
	local MaxEdge, MinEdge = self.MaxEdge, self.MinEdge
	return {
		x = MaxEdge.x - MinEdge.x + 1,
		y = MaxEdge.y - MinEdge.y + 1,
		z = MaxEdge.z - MinEdge.z + 1,
	}
end

function VoxelArea:getVolume()
	local e = self:getExtent()
	return e.x * e.y * e.z
end

function VoxelArea:index(x, y, z)
	local MinEdge = self.MinEdge
	local i = (z - MinEdge.z) * self.zstride +
			  (y - MinEdge.y) * self.ystride +
			  (x - MinEdge.x) + 1
	return math.floor(i)
end