The experimental rng engine I quickly wrote for unreleased Pixel Dungeon mod idea

RandoSource.java

public static class RandoSource extends java.util.Random {
		public long seed;
		public int count;

		public RandoSource(){
			this((long)Game.timeTotal);
		}

		public RandoSource(long seed){
			this.seed = seed;
			this.count = 0;
		}

		public float nextFloat(){
			float result = 0;
			switch (count % 2){
				case 0:
					result = (float) Math.sin((Game.timeTotal + seed)); break;
				case 1:
					result = (float) Math.cos((Game.timeTotal + seed)); break;
			}
			result += 1f;
			result /= 2f;
			count++;
			return result;
		}

		public int nextInt(int max){
			return (int) (nextFloat()*(max));
		}

		public int nextInt(){
			return nextInt(Integer.MAX_VALUE);
		}

		public long nextLong(long max){
			return (long) (nextFloat()*(max));
		}

		public long nextLong(){
			return nextLong(Long.MAX_VALUE);
		}
	}