table of contents
| FACEFORWARD(3G) | [FIXME: manual] | FACEFORWARD(3G) |
NAME¶
faceforward - return a vector pointing in the same direction as another
DECLARATION¶
genType faceforward(genType N, genType I, genType Nref);
genDType faceforward(genDType N, genDType I, genDType Nref);
PARAMETERS¶
N
Specifies the vector to orient.
I
Specifies the incident vector.
Nref
Specifies the reference vector.
DESCRIPTION¶
faceforward orients a vector to point away from a surface as defined by its normal. If dot()(Nref, I) < 0 faceforward returns N, otherwise it returns -N.
VERSION SUPPORT¶
| OpenGL Shading Language Version | ||||||||||||
| Function Name | 1.10 | 1.20 | 1.30 | 1.40 | 1.50 | 3.30 | 4.00 | 4.10 | 4.20 | 4.30 | 4.40 | 4.50 |
| faceforward (genType) | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
| faceforward (genDType) | - | - | - | - | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
SEE ALSO¶
reflect(), refract()
COPYRIGHT¶
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. http://opencontent.org/openpub/.
COPYRIGHT¶
Copyright © 2011-2014 Khronos Group
| 11/18/2024 | [FIXME: source] |