PBRT_V2 总结记录 <91> DiffuseAreaLight::Sample_f 和 DiffuseAreaLight::Pdf
Spectrum DiffuseAreaLight::Sample_L(const Point &amp;p, float pEpsilon, const LightSample &amp;ls, float time, Vector *wi, float *pdf, VisibilityTester *visibility) const { PBRT_...
