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Perform a texture lookup with projection and explicit level-of-detail and offset.


gvec4 textureProjLodOffset( gsampler1D sampler, vec2 P, float lod, int offset );
gvec4 textureProjLodOffset( gsampler1D sampler, vec4 P, float lod, int offset );
gvec4 textureProjLodOffset( gsampler2D sampler, vec3 P, float lod, ivec2 offset );
gvec4 textureProjLodOffset( gsampler2D sampler, vec4 P, float lod, ivec2 offset );
gvec4 textureProjLodOffset( gsampler3D sampler, vec4 P, float lod, ivec3 offset );
float textureProjLodOffset( sampler1DShadow sampler, vec4 P, float lod, int offset );
float textureProjLodOffset( sampler2DShadow sampler, vec4 P, float lod, ivec2 offset );


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.
lod - Specifies the explicit level-of-detail from which to fetch texels.
offset - Specifies the offset, in texels, to be applied to P before fetching texels.


 textureProjLodOffset performs a texture lookup with projection from an explicitly specified level-of-detail with an offset applied to the texture coordinates before sampling. 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 textureLodOffset , with lod used to specify the level-of-detail from which the texture will be sampled and offset used to specifiy the offset, in texels, to be applied to the texture coordinates before sampling.

Version Support[edit]

textureProjLodOffset 1.3+

See Also[edit]

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