volumegradient VEX function

Calculates the volume primitive’s gradient.

Contexts: image3d, chop, cop, pop, sop, surface, displace, fog, light, shadow, photon, cvex

  1. vector volumegradient(int inputnum, int primnum, vector pos)

  2. vector volumegradient(string filename, int primnum, vector pos)

Calculates the volume primitive’s gradient. Returns 0 if there is no input or file, or the primitive number is out of range. The gradient is a vector pointing in the direction of increasing value.