haslight

Context(s)	displace fog light shadow surface

int  haslight(material mat, vector P, int light, ...)

Returns 1 if the given light is used to illuminate the material at the point specified.

This function accepts PBR keyword arguments to specify sampling types. These options may exclude lights which don’t match the desired sampling paths.

The PBR sampling keywords include:

label

A string specifying a specific label. This keyword argument may be specified multiple times.

direct

Expects an 0 or 1 integer value which will limit lights based on indirect or direct contribution categories.

Examples

examples

haslight(material(), P, light_num, "direct", 0);