Name

textureProjGrad — perform a texture lookup with projection and explicit gradients

Declaration

gvec4 textureProjGrad(gsampler1D  sampler,
 vec2  P,
 float  pDx,
 float  pDy);
gvec4 textureProjGrad(gsampler1D  sampler,
 vec4  P,
 float  pDx,
 float  pDy);
gvec4 textureProjGrad(gsampler2D  sampler,
 vec3  P,
 vec2  pDx,
 vec2  pDy);
gvec4 textureProjGrad(gsampler2D  sampler,
 vec4  P,
 vec2  pDx,
 vec2  pDy);
gvec4 textureProjGrad(gsampler3D  sampler,
 vec4  P,
 vec3  pDx,
 vec3  pDy);
float textureProjGrad(sampler1DShadow  sampler,
 vec4  P,
 float  pDx,
 float  pDy);
float textureProjGrad(sampler2DShadow  sampler,
 vec4  P,
 vec2  pDx,
 vec2  pDy);
gvec4 textureProjGrad(gsampler2DRect  sampler,
 vec3  P,
 vec2  pDx,
 vec2  pDy);
gvec4 textureProjGrad(gsampler2DRect  sampler,
 vec4  P,
 vec2  pDx,
 vec2  pDy);
float textureProjGrad(gsampler2DRectShadow  sampler,
 vec4  P,
 vec2  pDx,
 vec2  pDy);

Parameters

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.

Description

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 3rd component of P in the shadow forms is used as Dref. After these values are computed, the texture lookup proceeds as in textureGrad, passing dPdx and dPdy as gradients.

Version Support

FunctionVersion 1.10Version 1.20Version 1.30Version 1.40Version 1.50Version 3.30Version 4.00Version 4.10Version 4.20Version 4.30
textureProjGrad--YYYYYYYY
textureProjGrad (gsampler2DRect{Shadow})---YYYYYYY

See Also

texelFetch, texelFetchOffset, texture, textureGather, textureGatherOffset, textureGatherOffsets, textureGrad, textureGradOffset, textureLod, textureLodOffset, textureOffset, textureProj, textureProjGradOffset, textureProjLod, textureProjLodOffset, textureProjOffset, textureQueryLod, textureSize

Copyright

Copyright © 2011 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/.