Random class for Unity.

Rand.cs

using Random = System.Random;

using UnityEngine;

namespace mattatz {

    public class Rand {

        Random rnd;

        public Rand(int seed) {
            rnd = new Random(seed);
        }

        public float Sample01() {
            return (float)rnd.NextDouble();
        }

        public int SampleRange(int a, int b) {
            var t = Sample01();
            return Mathf.FloorToInt(Mathf.Lerp(a, b, t));
        }

        public float SampleRange(float a, float b) {
            var t = Sample01();
            return Mathf.Lerp(a, b, t);
        }

        public Vector2 SampleUnitCircle () {
            var x = (Sample01() - 0.5f) * 2f;
            var y = (Sample01() - 0.5f) * 2f;
            return new Vector2(x, y);
        }

        public Vector3 SampleUnitSphere () {
            var x = (Sample01() - 0.5f) * 2f;
            var y = (Sample01() - 0.5f) * 2f;
            var z = (Sample01() - 0.5f) * 2f;
            return new Vector3(x, y, z);
        }

    }

}