SlaveMatrix-SDL/2DGAMELIB/_2DGAMELIB/MyRandom.cs

using System;

namespace _2DGAMELIB;

public class MyRandom : Random
{
	protected uint x;

	protected uint y;

	protected uint z;

	protected uint w;

	private const double d_4294967296 = 2.3283064365386963E-10;

	private const double d_9007199254740992 = 1.1102230246251565E-16;

	protected uint InitMtSub(uint s, uint i)
	{
		return 1812433253 * (s ^ (s >> 30)) + i + 1;
	}

	public void Initialize(uint s)
	{
		x = InitMtSub(s, 0u);
		y = InitMtSub(x, 1u);
		z = InitMtSub(y, 2u);
		w = InitMtSub(z, 3u);
	}

	public MyRandom(uint s)
	{
		Initialize(s);
	}

	public MyRandom()
		: this(4357u)
	{
	}

	public void Initialize(uint[] key)
	{
		uint num = (uint)key.Length;
		uint[] array = new uint[4];
		Initialize(1u);
		array[0] = x;
		array[1] = y;
		array[2] = z;
		array[3] = w;
		uint s = w;
		uint num2;
		for (num2 = 0u; num2 < num; num2++)
		{
			array[num2 & 3] ^= (s = InitMtSub(s, key[num2] + num2));
		}
		uint num3 = 0u;
		while (num3 < 3)
		{
			array[num2 & 3] ^= (s = InitMtSub(s, num3));
			num3++;
			num2++;
		}
		x = array[0];
		y = array[1];
		z = array[2];
		w = array[3];
		if (x == 0 && y == 0 && z == 0 && w == 0)
		{
			x = 1u;
		}
	}

	public MyRandom(uint[] key)
	{
		Initialize(key);
	}

	public override int Next()
	{
		uint num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		return (int)(0.5 * (double)(w = w ^ (w >> 19) ^ num ^ (num >> 8)));
	}

	public override int Next(int les)
	{
		uint num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		return (int)((double)les * 2.3283064365386963E-10 * (double)(w = w ^ (w >> 19) ^ num ^ (num >> 8)));
	}

	public void Next(int les, out int o)
	{
		uint num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		o = (int)((double)les * 2.3283064365386963E-10 * (double)(w = w ^ (w >> 19) ^ num ^ (num >> 8)));
	}

	public override int Next(int sta, int les)
	{
		uint num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		return (int)((double)(les - sta) * 2.3283064365386963E-10 * (double)(w = w ^ (w >> 19) ^ num ^ (num >> 8))) + sta;
	}

	public int NextM(int max)
	{
		uint num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		return (int)((double)((long)max + 1L) * 2.3283064365386963E-10 * (double)(w = w ^ (w >> 19) ^ num ^ (num >> 8)));
	}

	public int NextM(int min, int max)
	{
		uint num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		return (int)((double)((long)(max - min) + 1L) * 2.3283064365386963E-10 * (double)(w = w ^ (w >> 19) ^ num ^ (num >> 8))) + min;
	}

	public override double NextDouble()
	{
		uint num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		uint num2 = (w = w ^ (w >> 19) ^ num ^ (num >> 8)) >> 11;
		num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		return 1.1102230246251565E-16 * ((double)(w = w ^ (w >> 19) ^ num ^ (num >> 8)) * 2097152.0 + (double)num2);
	}

	public double NextDouble(double les)
	{
		uint num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		uint num2 = (w = w ^ (w >> 19) ^ num ^ (num >> 8)) >> 11;
		num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		return les * 1.1102230246251565E-16 * ((double)(w = w ^ (w >> 19) ^ num ^ (num >> 8)) * 2097152.0 + (double)num2);
	}

	public double NextDouble(double sta, double les)
	{
		uint num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		uint num2 = (w = w ^ (w >> 19) ^ num ^ (num >> 8)) >> 11;
		num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		return (les - sta) * 1.1102230246251565E-16 * ((double)(w = w ^ (w >> 19) ^ num ^ (num >> 8)) * 2097152.0 + (double)num2) + sta;
	}

	public bool NextBool()
	{
		uint num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		return (w = w ^ (w >> 19) ^ num ^ (num >> 8)) % 2 == 0;
	}

	public int NextSign()
	{
		uint num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		if ((w = w ^ (w >> 19) ^ num ^ (num >> 8)) % 2 != 0)
		{
			return -1;
		}
		return 1;
	}

	public double NextNorCos(double mu = 0.0, double sigma = 1.0)
	{
		uint num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		uint num2 = (w = w ^ (w >> 19) ^ num ^ (num >> 8)) >> 11;
		num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		double d = 1.1102230246251565E-16 * ((double)(w = w ^ (w >> 19) ^ num ^ (num >> 8)) * 2097152.0 + (double)num2);
		num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		num2 = (w = w ^ (w >> 19) ^ num ^ (num >> 8)) >> 11;
		num = x ^ (x << 11);
		x = y;
		y = z;
		z = w;
		double num3 = 1.1102230246251565E-16 * ((double)(w = w ^ (w >> 19) ^ num ^ (num >> 8)) * 2097152.0 + (double)num2);
		return System.Math.Sqrt(-2.0 * System.Math.Log(d)) * System.Math.Cos(System.Math.PI * 2.0 * num3) * sigma + mu;
	}
}