acos VEX function

Returns the arc-cosine of the argument.

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

  1. float acos(float )

  2. vector acos(vector )

  3. vector4 acos(vector4 )

Returns the arc-cosine of the argument. The return value is in the range 0 to pi.