lit.fwd_diff

Description

Legacy lighting function (obsolete).

Signature

static DifferentialPair<vector<float, 4>> lit.fwd_diff(
    DifferentialPair<float> ,
    DifferentialPair<float> ,
    DifferentialPair<float> );

Parameters

Return value

The lighting coefficients, (ambient, diffuse, specular, 1.0).

Remarks

In HLSL, this function is implemented as an intrinsic. It is emulated for other targets.