fwidth - HLSL
Microsoft DirectX 9.0 SDK Update (October 2004)

fwidth - HLSL


Returns the absolute value of the partial derivatives, or abs(ddx(x)) + abs(ddy(x)).

Syntax

ret fwidth(x)

Where:

NameIn/OutTemplate TypeComponent TypeSize
xinscalar, vector, or matrixfloatany
retoutsame as input xfloatsame dimension(s) as input x

Minimum Shader Version

This intrinsic function is supported in the following (or above) shader versions:

Vertex ShaderPixel Shader
n/aps_2_x


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