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smoothstep

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Returns a smooth Hermite interpolation between 0 and 1, if x is in the range [min, max].

ret smoothstep(min, max, x)

Parameters

Item Description
min
 [in] The minimum range of the x parameter.
max
 [in] The maximum range of the x parameter.
x
 [in] The specified value to be interpolated.

Return Value

Returns 0 if x is less than min; 1 if x is greater than max; otherwise, a value between 0 and 1 if x is in the range [min, max].

Remarks

Use the smoothstep HLSL intrinsic function to create a smooth transition between two values. For example, you can use this function to blend two colors smoothly.

Type Description

Name Template Type Component Type Size
x scalar, vector, or matrix float any
min same as input x float same dimension(s) as input x
max same as input x float same dimension(s) as input x
ret same as input x float same dimension(s) as input x

Minimum Shader Model

This function is supported in the following shader models.

Shader Model Supported
Shader Model 2 (DirectX HLSL) and higher shader models yes
Shader Model 1 (DirectX HLSL) yes (vs_1_1 only)

See also

Intrinsic Functions (DirectX HLSL)