faceforward — return a vector pointing in the same direction as another
genType faceforward(
|
genType N, |
| genType I, | |
genType Nref); |
N
Specifies the vector to orient.
I
Specifies the incident vector.
Nref
Specifies the reference vector.
faceforward orients a vector to point away from a surface as defined by its normal.
If dot(
Nref, I) < 0faceforward returns N, otherwise it returns -.
N
| OpenGL ES Shading Language Version | ||||
|---|---|---|---|---|
| Function Name | 1.00 | 3.00 | 3.10 | 3.20 |
| faceforward (genType) | ✔ | ✔ | ✔ | ✔ |
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