gistfile1.diff

diff --git a/builtin/voxelarea.lua b/builtin/voxelarea.lua
index dd9af79..7749017 100644
--- a/builtin/voxelarea.lua
+++ b/builtin/voxelarea.lua
@@ -44,6 +44,19 @@ function VoxelArea:indexp(p)
        return math.floor(i)
 end
 
+function VoxelArea:position(i)
+       local p = {}
+       p.z = math.floor(i / self.zstride) + self.MinEdge.z
+       i = i % self.zstride
+       
+       p.y = math.floor(i / self.ystride) + self.MinEdge.y
+       i = i % self.ystride
+       
+       p.x = math.floor(i) + self.MinEdge.x - 1
+       
+       return p
+end
+
 function VoxelArea:contains(x, y, z)
        return (x >= self.MinEdge.x) and (x <= self.MaxEdge.x) and
                   (y >= self.MinEdge.y) and (y <= self.MaxEdge.y) and