C++ (Cpp) RNG::UniformUInt32 Examples

Example #1

File: sampling.cpp Project: Jerry-King/pbrt-v3

void LatinHypercube(Float *samples, int nSamples, int nDim, RNG &rng) {
    // Generate LHS samples along diagonal
    Float invNSamples = (Float)1 / nSamples;
    for (int i = 0; i < nSamples; ++i)
        for (int j = 0; j < nDim; ++j) {
            Float sj = (i + (rng.UniformFloat())) * invNSamples;
            samples[nDim * i + j] = std::min(sj, OneMinusEpsilon);
        }

    // Permute LHS samples in each dimension
    for (int i = 0; i < nDim; ++i) {
        for (int j = 0; j < nSamples; ++j) {
            int other = j + rng.UniformUInt32(nSamples - j);
            std::swap(samples[nDim * j + i], samples[nDim * other + i]);
        }
    }
}