praktikum-holons/src/holeg/utility/math/Maths.java

package holeg.utility.math;

public class Maths {
	public final static double EPSILON = 1E-6;
	
	/**
	 * Linear Interpolation from first to second via alpha amount.
	 * @param first
	 * @param second
	 * @param alpha
	 * @return
	 */
	public static double lerp(double first, double second, double alpha) {
		return first * (1.0 - alpha) + second * alpha;
	}
	/**
	 * Inverse Linear Interpolation from min to max to get the corresponding alpha from value.
	 * @param min
	 * @param max
	 * @param value
	 * @return
	 */
	public static double invLerp(double min, double max, double value) {
		if (Math.abs(max - min) < EPSILON) return max;
		else return (value - min) / (max - min);
	}

	public static int Clamp(int value, int min, int max){
		return Math.max(min, Math.min(max, value));
	}
	public static float Clamp(float value, float min, float max){
		return Math.max(min, Math.min(max, value));
	}
	public static double Clamp(double value, double min, double max){
		return Math.max(min, Math.min(max, value));
	}
}