Name

textureProjGrad — perform a texture lookup with projection and explicit gradients

Declaration

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);
 

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

OpenGL ES Shading Language Version
Function Name 1.00 3.00
textureProjGrad-✔

See Also

texelFetch, texelFetchOffset, texture, textureGrad, textureGradOffset, textureLod, textureLodOffset, textureOffset, textureProj, textureProjGradOffset, textureProjLod, textureProjLodOffset, textureProjOffset, textureSize

Copyright

Copyright © 2011-2013 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.