2011 Khronos Group
textureProjGradOffset 3G
textureProjGradOffset perform a texture lookup with projection, explicit gradients and offset

## Declaration

gvec4 `textureProjGradOffset` gsampler1D sampler vec2 P float dPdx float dPdy int offset gvec4 `textureProjGradOffset` gsampler1D sampler vec4 P float dPdx float dPdy int offset gvec4 `textureProjGradOffset` gsampler2D sampler vec3 P vec2 dPdx vec2 dPdy ivec2 offset gvec4 `textureProjGradOffset` gsampler2D sampler vec4 P vec2 dPdx vec2 dPdy ivec2 offset gvec4 `textureProjGradOffset` gsampler3D sampler vec4 P vec3 dPdx vec3 dPdy ivec3 offset float `textureProjGradOffset` sampler1DShadow sampler vec4 P float dPdx float dPdy int offset float `textureProjGradOffset` sampler2DShadow sampler vec4 P vec2 dPdx vec2 dPdy ivec2 offset gvec4 `textureProjGradOffset` gsampler2DRect sampler vec3 P vec2 dPdx vec2 dPdy ivec2 offset gvec4 `textureProjGradOffset` gsampler2DRect sampler vec4 P vec2 dPdx vec2 dPdy ivec2 offset float `textureProjGradOffset` gsampler2DRectShadow sampler vec4 P vec2 dPdx vec2 dPdy ivec2 offset

## 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.

offset

  Specifies the offsets, in texels at which the texture will be sampled relative to the projection of P.

## Description

`textureProjGradOffset` performs a texture lookup with projection and explicit gradients and offsets. The texture coordinates consumed from P, not including the last component of P, are divided by the last component of P. The resulting 3 rd component of P in the shadow forms is used as D ref. After these values are computed, the texture lookup proceeds as in textureGradOffset, passing dPdx and dPdy as gradients, and offset as the offset.

## Version Support

#VARTABLECOLS#
#FUNCTABLEHEADER#
textureProjGradOffset#newin13#
textureProjGradOffset (gsampler2DRect{Shadow})#newin14#

## See Also

texelFetch, texelFetchOffset, texture, textureGather, textureGatherOffset, textureGatherOffsets, textureGrad, textureGradOffset, textureLod, textureLodOffset, textureOffset, textureProj, textureProjGrad, 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/.