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implementing bsdfs;
public struct LambertDiffuseBTDF : IBSDF, IDifferentiable
{
float3 albedo = {}; ///< Diffuse albedo.
#if 0
public __init(float3 albedo_)
#else
__init(float3 albedo_)
#endif
{
this.albedo = albedo_;
}
[Differentiable]
public float3 eval(const float3 wi, const float3 wo, BSDFContext bc)
{
if (min(wi.z, -wo.z) < 1e-6f)
return float3(0.f);
return (1.0 / 3.1415) * albedo * -wo.z;
}
}
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