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 |
| faceforward (genType) | ✔ | ✔ | ✔ |
Copyright © 2011-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. https://opencontent.org/openpub/.