TextureFactory.java 文件源码

public static Texture generateNoise(long seed, int size, double featureSize) {
    OpenSimplexNoise noise = new OpenSimplexNoise(seed);

    Pixmap pixmap = new Pixmap(size, size, Format.RGBA4444);

    //add layer of noise
    for (int y = 0; y < pixmap.getHeight(); ++y) {
        for (int x = 0; x < pixmap.getWidth(); ++x) {

            double nx = x / featureSize, ny = y / featureSize;
            double i = noise.eval(nx, ny, 0);
            i = (i * 0.5) + 0.5; // convert from range [-1:1] to [0:1]

            pixmap.setColor(new Color((float) i, (float) i, (float) i, 1));
            pixmap.drawPixel(x, y);

        }
    }


    Texture t = new Texture(pixmap);
    pixmap.dispose();
    return t;
}