gistfile1.txt

using UnityEngine;

public class Util
{
	static public T Choice<T>(T[] choices) {
		// Why is Random.value [0,1] and not [0,1) like every other library? Or why isn't there a [0,1) variant?
		return choices.Length > 0 ? choices[Mathf.FloorToInt(Random.value * 0.99999999f * choices.Length)] : default(T);
	}

	static public Vector2 PerpendicularCW(Vector2 vec) {
		return new Vector2(vec.y, -vec.x);
	}

	static public Vector2 PerpendicularCCW(Vector2 vec) {
		return new Vector2(-vec.y, vec.x);
	}

	static public float Angle(Vector2 vector) {
		return Mathf.Atan2(vector.y, vector.x);
	}
	
	static public float Angle(Vector2 from, Vector2 to) {
		return Angle(from - to);
	}

	static public bool AreColorsEqual(Color32 lhs, Color32 rhs) {
		return lhs.r == rhs.r && lhs.g == rhs.g && lhs.b == rhs.b && lhs.a == rhs.a;
	}
}