Volume Pos To Index from File VEX node

Calculates the voxel closest to a voxel of a volume primitive stored in a disk file.

See also: Volume Sample, Volume Gradient, Volume Gradient from File

Calcluates the index of a voxel closest to a position in a volume primitive. Returns 0 if “primnum” is out of range, the “filename” is invalid, or the given primitive is not a volume primitive.