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texCUBE (HLSL reference) - Select the mip level

  • Article

Samples a cube texture using a gradient to select the mip level.

ret texCUBE(s, t, ddx, ddy)

Parameters

Item Description
s
 [in] The sampler state.
t
 [in] The texture coordinate.
ddx
 [in] Rate of change of the surface geometry in the x direction.
ddy
 [in] Rate of change of the surface geometry in the y direction.

Return Value

The value of the texture data.

Type Description

Name In/Out Template Type Component Type Size
s in object samplerCUBE 1
t in vector float 3
ddx in vector float 3
ddy in vector float 3
ret out vector float 4

Minimum Shader Model

This function is supported in the following shader models.

Shader Model Supported
Shader Model 4 yes (pixel shader only)
Shader Model 3 (DirectX HLSL) yes (pixel shader only)
Shader Model 2 (DirectX HLSL) yes (pixel shader only)
Shader Model 1 (DirectX HLSL) no
  1. Significant code reordering is done to move gradient computations outside of flow control.
  2. If the D3DPSHADERCAPS2_0 cap is set with D3DD3DPSHADERCAPS2_0_GRADIENTINSTRUCTIONS, the compiler maps this function to texldd.

See also

Intrinsic Functions (DirectX HLSL)