uvunwrap

int  uvunwrap(string object_path, float u, float v, float time, vector &P, vector &I)

int  uvunwrap(string object_path, float u, float v, float time, vector &P, vector &I, vector &mikkelsenUtan, vector &mikkelsenVtan)

This function only makes sense in a Mantra context, for use in texture baking or in a lens shader. The function unfortunately must be “context-less” so it’s available to the CVEX lens shader, but in any other context it will fail and return 0.

For any other kind of texture sampling, use the superior uvsample or uvintersect functions instead of this.

object_path

The object being unwrapped.

u, v

The UV coordinates specifying where on the surface to get the position and normal.

time

The time along the timeline at which to measure the geometry, in seconds.

&P

If it succeeds, the function overwrites this variable with the world space position of the given point.

&I

If it succeeds, the function overwrites this variable with the normal at the given point.

&mikkelsenUtan, &mikkelsenVtan

The function overwrites these variables with the Mikkelsen tangent vectors.

Returns

1 if the UV coordinates specified a valid point on the surface, or 0 otherwise.