C++ (Cpp) InvertCatmullRom示例

示例#1

文件： bssrdf.cpp 项目： AndreaLoforte/pbrt-v3

void SubsurfaceFromDiffuse(const BSSRDFTable &t, const Spectrum &rhoEff,
                           const Spectrum &mfp, Spectrum *sigma_a,
                           Spectrum *sigma_s) {
    for (int c = 0; c < Spectrum::nSamples; ++c) {
        Float rho = InvertCatmullRom(t.nRhoSamples, t.rhoSamples.get(),
                                     t.rhoEff.get(), rhoEff[c]);
        (*sigma_s)[c] = rho / mfp[c];
        (*sigma_a)[c] = (1 - rho) / mfp[c];
    }
}

示例#2

文件： bssrdf.cpp 项目： yangjiaqian/pbrt-v3

void SubsurfaceFromDiffuse(const BSSRDFTable &table, const Spectrum &Kd,
                           const Spectrum &sigma_t, Spectrum *sigma_a,
                           Spectrum *sigma_s) {
    for (int c = 0; c < Spectrum::nSamples; ++c) {
        Float rho = InvertCatmullRom(table.nRhoSamples, table.rhoSamples.get(),
                                     table.rhoEff.get(), Kd[c]);
        (*sigma_s)[c] = rho * sigma_t[c];
        (*sigma_a)[c] = (1 - rho) * sigma_t[c];
    }
}