| Function |
Syntax |
Description
|
| length |
float=length(x) |
Returns the length of vector x.
|
| distance |
float=distance(p0,p1) |
Returns the distance between p0 and p1.
|
| dot |
float=dot(x,y) |
Returns the dot product of x and y.
|
| cross |
vec3=cross(x,y) |
Returns the cross product of x and y.
|
| normalize |
mix(x) |
Returns a vector in the same direction as x but with a length of 1.
|
| faceforward |
faceforward(N,I.Nref) |
If dot(Nref,I)<0 return N, otherwise return –N.
|
| reflect |
reflect(I,N) |
For the incident vector I and surface orientation N, returns the reflection direction: I–2∗dot(N,I)∗N
|
| refract |
refract(I,N,eta) |
For the incident vector I and surface normal N, and the ratio of indices of refraction eta, return the refraction vector.
|
