textureGrad — perform a texture lookup with explicit gradients
gvec4 textureGrad( | gsampler2D sampler, |
| vec2 P, | |
| vec2 dPdx, | |
vec2 dPdy); |
gvec4 textureGrad( | gsampler3D sampler, |
| vec3 P, | |
| vec3 dPdx, | |
vec3 dPdy); |
gvec4 textureGrad( | gsamplerCube sampler, |
| vec3 P, | |
| vec3 dPdx, | |
vec3 dPdy); |
float textureGrad( | sampler2DShadow sampler, |
| vec3 P, | |
| vec2 dPdx, | |
vec2 dPdy); |
float textureGrad( | samplerCubeShadow sampler, |
| vec4 P, | |
| vec3 dPdx, | |
vec3 dPdy); |
gvec4 textureGrad( | gsampler2DArray sampler, |
| vec3 P, | |
| vec2 dPdx, | |
vec2 dPdy); |
float textureGrad( | gsampler2DArrayShadow 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.
textureGrad performs a texture lookup at coordinate P from the texture bound to sampler with explicit texture coordinate gradiends as specified in dPdx and dPdy. Set:
For the cube version, the partial derivatives of P are assumed to be in the coordinate system used before texture coordinates are projected onto the appropriate cube face.
| OpenGL ES Shading Language Version | |||
|---|---|---|---|
| Function Name | 1.00 | 3.00 | 3.10 |
| textureGrad | - | ✔ | ✔ |
texelFetch, texelFetchOffset, texture, textureGradOffset, textureLod, textureLodOffset, textureOffset, textureProj, textureProjGrad, 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/.