textureProjGrad — perform a texture lookup with projection and explicit gradients
gvec4 textureProjGrad( | gsampler2D sampler, |
| vec3 P, | |
| vec2 dPdx, | |
vec2 dPdy); |
gvec4 textureProjGrad( | gsampler2D sampler, |
| vec4 P, | |
| vec2 dPdx, | |
vec2 dPdy); |
gvec4 textureProjGrad( | gsampler3D sampler, |
| vec4 P, | |
| vec3 dPdx, | |
vec3 dPdy); |
float textureProjGrad( | sampler2DShadow sampler, |
| vec4 P, | |
| vec2 dPdx, | |
vec2 dPdy); |
sampler Specifies the sampler to which the texture from which texels will be retrieved is bound.
P Specifies the texture coordinates at which texture will be sampled.
dPdx Specifies the partial derivative of P with respect to window x.
dPdy Specifies the partial derivative of P with respect to window y.
textureProjGrad performs a texture lookup with projection and explicit gradients. The texture coordinates consumed from P, not including the last component of P, are divided by the last component of P. The resulting component of P in the shadow forms is used as . After these values are computed, the texture lookup proceeds as in textureGrad, passing dPdx and dPdy as gradients.
| OpenGL ES Shading Language Version | |||
|---|---|---|---|
| Function Name | 1.00 | 3.00 | 3.10 |
| textureProjGrad | - | ✔ | ✔ |
texelFetch, texelFetchOffset, texture, textureGrad, textureGradOffset, textureLod, textureLodOffset, textureOffset, textureProj, textureProjGradOffset, textureProjLod, textureProjLodOffset, textureProjOffset, textureSize
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/.