Reflect
Calculate the reflection direction for an incident vector
Declaration
float reflect(float I, float N)
vec2 reflect(vec2 I, vec2 N)
vec3 reflect(vec3 I, vec3 N)
vec4 reflect(vec4 I, vec4 N)Parameters
I specifies the incident vector.
N specifies the normal vector.
Description
For a given incident vector I and surface normal N reflect returns the reflection direction calculated as I - 2.0 * dot(N, I) * N.
N should be normalized in order to achieve the desired result.