C++ (Cpp) PRNG::seed Examples

Example #1

File: histogramimage.cpp Project: B-Rich/zenphoton

void HistogramImage::render(std::vector<unsigned char> &rgb, double scale, double exponent)
{
    // Tone mapping from 64-bit-per-channel to 8-bit-per-channel, with dithering.

    PRNG rng;
    rng.seed(0);

    unsigned i = 0;
    unsigned e = mWidth * mHeight * kChannels; 
    rgb.resize(e);

    for (; i != e; ++i) {
        double u = std::max(0.0, mCounts[i] * scale);
        double dither = rng.uniform();
        double v = 255.0 * pow(u, exponent) + dither;
        rgb[i] = std::max(0.0, std::min(255.9, v));
    }
}