47 lines
899 B
Lua
47 lines
899 B
Lua
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VoxelArea = {
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MinEdge = {x=1, y=1, z=1},
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MaxEdge = {x=0, y=0, z=0},
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ystride = 0,
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zstride = 0,
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}
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function VoxelArea:new(o)
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o = o or {}
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setmetatable(o, self)
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self.__index = self
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local e = o:getExtent()
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o.ystride = e.x
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o.zstride = e.x * e.y
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return o
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end
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function VoxelArea:getExtent()
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return {
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x = self.MaxEdge.x - self.MinEdge.x + 1,
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y = self.MaxEdge.y - self.MinEdge.y + 1,
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z = self.MaxEdge.z - self.MinEdge.z + 1,
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}
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end
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function VoxelArea:getVolume()
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local e = self:getExtent()
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return e.x * e.y * e.z
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end
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function VoxelArea:index(x, y, z)
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local i = (z - self.MinEdge.z) * self.zstride +
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(y - self.MinEdge.y) * self.ystride +
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(x - self.MinEdge.x) + 1
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return math.floor(i)
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end
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function VoxelArea:indexp(p)
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local i = (p.z - self.MinEdge.z) * self.zstride +
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(p.y - self.MinEdge.y) * self.ystride +
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(p.x - self.MinEdge.x) + 1
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return math.floor(i)
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end
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