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Perform a texture lookup with projection.


gvec4 textureProj( gsampler1D sampler, vec2 P, [float bias] );
gvec4 textureProj( gsampler1D sampler, vec4 P, [float bias] );
gvec4 textureProj( gsampler2D sampler, vec3 P, [float bias] );
gvec4 textureProj( gsampler2D sampler, vec4 P, [float bias] );
gvec4 textureProj( gsampler3D sampler, vec4 P, [float bias] );
float textureProj( sampler1DShadow sampler, vec4 P, [float bias] );
float textureProj( sampler2DShadow sampler, vec4 P, [float bias] );
gvec4 textureProj( gsampler2DRect sampler, vec3 P );
gvec4 textureProj( gsampler2DRect sampler, vec4 P );
float textureProj( gsampler2DRectShadow sampler, vec4 P );


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.
bias - Specifies an optional bias to be applied during level-of-detail computation.


 textureProj performs a texture lookup with projection. The texture coordinates consumed from P , not including the last component of P , are divided by the last component of P . The resulting [math][/math] component of P in the shadow forms is used as [math][/math] . After these values are computed, the texture lookup proceeds as in texture .

Version Support[edit]

textureProj 1.3+
textureProj (gsampler2DRect{Shadow}) 1.4+

See Also[edit]

 texelFetch , texelFetchOffset , texture , textureGather , textureGatherOffset , textureGatherOffsets , textureGrad , textureGradOffset , textureLod , textureLodOffset , textureOffset , textureProjGrad , textureProjGradOffset , textureProjLod , textureProjLodOffset , textureProjOffset , textureQueryLod , 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. http://opencontent.org/openpub/.