Method fork

src/main/java/trace/random/Random.kt:31–46

    fun fork(): Random {
        val v = Random()

        val ns = source.mt!!.copyOf()
        ns[10] = forked++
        v.source = MersenneTwisterFast(ns)

        v.a = a
        v.b = b
        v.bi = bi
        v.c = c
        v.d = d
        v.T = T

        return v
    }

    fun nextDouble(): Double {
        while (bi < 0)
            nextDouble(1.0)