Context(s) | displace fog surface |
Note
This function only works with area lights.
int intersect_lights(int lightids[], vector pos, vector dir, float time, int &idx, float &dist, vector &clr, float &scale, ...)
lightids
An array of light IDs, as returned by getlights.
pos
The origin of the ray (such as the global variable P
).
dir
Direction vector from the origin. The length of this vector does not affect the distance the ray will travel.
time
Time to send the ray at.
The function modifies the values of the following arguments:
idx
The light index for the light that was hit by the ray, or -1 if no intersection was found.
dist
The distance to the nearest intersected light.
clr
The light color set by the light shader.
scale
The light average hemispherical intensity (for area lights).
Returns
A component bitmask indicating what types of component bounces the light affects,
or 0
if the ray did not hit a light.
See also | |
light |
|
pbr |
|
raytracing |