Converting convex hull to binary mask

Question

I want to generate a binary mask that has ones for all voxels inside and zeros for all voxels outside a volume. The volume is defined by the convex hull around a set of 3D c

Answer 1

This is a scan conversion problem. Check out section 8 of 3D Scan-Conversion Algorithms for Voxel-Based Graphics.

The algorithm you want is the solid one, and is slightly simpler since you are voxelizing a convex polyhedron whose faces are triangles - each "voxel" run is bounded by two triangles.