public void ComputeScatteringFunctions(SurfaceInteraction si,
IObjectArena arena,
TransportMode mode,
bool allowMultipleLobes)
{
BumpMap?.Bump(si);
var bsdf = si.BSDF.Initialize(in si);
var kd = Kd.Evaluate(in si).Clamp();
if (!kd.IsBlack())
{
bsdf.Add(arena.Create <LambertianReflection>().Initialize(in kd));
}
var ks = Ks.Evaluate(in si).Clamp();
if (ks.IsBlack())
{
return;
}
var fresnel = arena.Create <FresnelDielectric>().Initialize(1.5f, 1f);
var rough = Roughness.Evaluate(in si);
if (RemapRoughness)
{
rough = TrowbridgeReitzDistribution.RoughnessToAlpha(rough);
}
var distribution = arena.Create <TrowbridgeReitzDistribution>().Initialize(rough, rough);
bsdf.Add(arena.Create <MicrofacetReflection>().Initialize(ks, distribution, fresnel));
}
public void ComputeScatteringFunctions(SurfaceInteraction si,
IObjectArena arena,
TransportMode mode,
bool allowMultipleLobes)
{
_bumpMap?.Bump(si);
si.BSDF.Initialize(si);
var uRough = _uRoughness?.Evaluate(si) ?? _roughness.Evaluate(si);
var vRough = _vRoughness?.Evaluate(si) ?? _roughness.Evaluate(si);
if (_remapRoughness)
{
uRough = TrowbridgeReitzDistribution.RoughnessToAlpha(uRough);
vRough = TrowbridgeReitzDistribution.RoughnessToAlpha(vRough);
}
var fr = arena.Create <FresnelConductor>().Initialize(Spectrum.One, _eta.Evaluate(si), _k.Evaluate(si));
var dist = arena.Create <TrowbridgeReitzDistribution>().Initialize(uRough, vRough);
si.BSDF.Add(arena.Create <MicrofacetReflection>().Initialize(Spectrum.One, dist, fr));
}