| 1 | package trace.random |
| 2 | |
| 3 | class RandomCascade { |
| 4 | val r = mutableListOf<Random>() |
| 5 | val h = mutableListOf<Double>() |
| 6 | val a = mutableListOf<Double>() |
| 7 | |
| 8 | constructor() { |
| 9 | r.addAll(mutableListOf(Random(), Random(), Random(), Random())) |
| 10 | h.addAll(mutableListOf(1.0, 2.0, 3.0, 4.0)) |
| 11 | a.addAll(mutableListOf(1.0, 1 / 2.0, 1 / 4.0, 1 / 8.0)) |
| 12 | r.forEach { it.nextDouble(Math.random()) } |
| 13 | } |
| 14 | |
| 15 | constructor(num: Int) { |
| 16 | var o = 1.0 |
| 17 | for (n in 0 until num) { |
| 18 | r.add(Random()) |
| 19 | h.add(o) |
| 20 | a.add(1 / (Math.pow(2.0, o))) |
| 21 | o += 1 |
| 22 | } |
| 23 | r.forEach { it.nextDouble(Math.random()) } |
| 24 | } |
| 25 | |
| 26 | constructor(num: Int, seed: String) { |
| 27 | var o = 1.0 |
| 28 | for (n in 0 until num) { |
| 29 | r.add(Random(seed, n.toDouble())) |
| 30 | h.add(o) |
| 31 | a.add(1 / (Math.pow(2.0, o))) |
| 32 | o += 1 |
| 33 | } |
| 34 | r.forEach { it.nextDouble(Math.random()) } |
| 35 | } |
| 36 | |
| 37 | |
| 38 | constructor(seed: String) { |
| 39 | r.addAll(mutableListOf(Random(seed + "0"), Random(seed + "1"), Random(seed + "2"), Random(seed + "3"))) |
| 40 | h.addAll(mutableListOf(1.0, 2.0, 3.0, 4.0)) |
| 41 | a.addAll(mutableListOf(1.0, 1 / 2.0, 1 / 4.0, 1 / 8.0)) |
| 42 | r.forEachIndexed { index, ran -> ran.nextDouble((seed + "$index").hashCode() / 2000.0) } |
| 43 | } |
| 44 | |
| 45 | constructor(seed: String, num: Double) { |
| 46 | r.addAll(mutableListOf(Random(seed + "0", num), Random(seed + "1", num), Random(seed + "2", num), Random(seed + "3", num))) |
| 47 | h.addAll(mutableListOf(1.0, 2.0, 3.0, 4.0)) |
| 48 | a.addAll(mutableListOf(1.0, 1 / 2.0, 1 / 4.0, 1 / 8.0)) |
| 49 | r.forEach { it.nextDouble(Math.random()) } |
| 50 | r.forEachIndexed { index, ran -> ran.nextDouble(num + (seed + "$index").hashCode() / 2000.0) } |
| 51 | } |
| 52 | |
| 53 | fun nextDouble(increment: Double): Double { |
| 54 | return r.mapIndexed { index, rr -> rr.nextDouble(increment * h[index]) * a[index] }.sum() |
| 55 | } |
| 56 | |
| 57 | fun nextGaussian(increment: Double): Double { |
| 58 | return r.mapIndexed { index, rr -> rr.nextGaussian(increment * h[index]) * a[index] }.sum() |
| 59 | } |
| 60 | |