Examples of MersenneRandom

     * Compare results with
     * http://www.math.keio.ac.jp/matumoto/CODES/MT2002/mt19937ar.out
     */
    @Test
    public void correctnessTest() {
        MersenneRandom r = new MersenneRandom(new int[]{0x123, 0x234, 0x345, 0x456});
        logger.debug("Compare MersenneTwisterFast with new (2002/1/26) seeding mechanism with original result data..");


        for (int j = 0; j < 1000; j++) {
            // first, convert the int from signed to "unsigned"
            long l = r.nextInt();
            if (l < 0) {
                l += 4294967296L; // Integer.MAX_VALUE
            }


            assertEquals(FIRST_1000_VALS[j], l);

Examples of org.terasology.utilities.random.MersenneRandom

        logger.info("FastRandom: {}ms.", (System.nanoTime() - start) / 1000000);
        logger.trace("Use the result so that JVM doesn't skip the computation - here it is: {}", sum);


        // -------------------------------------------------------


        MersenneRandom r = new MersenneRandom(seed);


        // warmup
        sum = 0;
        for (int j = 0; j < warmUpCount; j++) {
            sum += r.nextInt();
        }


        sum = 0;
        start = System.nanoTime();
        for (int j = 0; j < count; j++) {
            sum += r.nextInt();
        }


        logger.info("MersenneRandom: {}ms.", (System.nanoTime() - start) / 1000000);
        logger.trace("Use the result so that JVM doesn't skip the computation - here it is: {}", sum);
    }

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