Name
textureLod — perform a texture lookup with explicit level-of-detail
Declaration
gvec4 textureLod( | gsampler1D | sampler, |
| float | P, |
| float | lod) ; |
gvec4 textureLod( | gsampler2D | sampler, |
| vec2 | P, |
| float | lod) ; |
gvec4 textureLod( | gsampler3D | sampler, |
| vec3 | P, |
| float | lod) ; |
gvec4 textureLod( | gsamplerCube | sampler, |
| vec3 | P, |
| float | lod) ; |
float textureLod( | sampler1DShadow | sampler, |
| vec3 | P, |
| float | lod) ; |
float textureLod( | sampler2DShadow | sampler, |
| vec4 | P, |
| float | lod) ; |
gvec4 textureLod( | gsampler1DArray | sampler, |
| vec2 | P, |
| float | lod) ; |
gvec4 textureLod( | gsampler2DArray | sampler, |
| vec3 | P, |
| float | lod) ; |
float textureLod( | sampler1DArrayShadow | sampler, |
| vec3 | P, |
| float | lod) ; |
gvec4 textureLod( | gsamplerCubeArray | sampler, |
| vec4 | P, |
| float | lod) ; |
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.
lod
Specifies the explicit level-of-detail
Description
textureLod
performs a texture lookup at coordinate P
from the
texture bound to sampler
with an explicit level-of-detail as specified in lod
.
lod
specifies
λbase
and sets the partial derivatives as follows:
δ
u
δ
x
=
0
,
δ
v
δ
x
=
0
,
δ
w
δ
x
=
0
δ
u
δ
y
=
0
,
δ
v
δ
y
=
0
,
δ
w
δ
y
=
0
See Also
texelFetch,
texelFetchOffset,
texture,
textureGather,
textureGatherOffset,
textureGatherOffsets,
textureGrad,
textureGradOffset,
textureLodOffset,
textureOffset,
textureProj,
textureProjGrad,
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/.