Compute the difference between two angles. - Java java.lang

Java examples for java.lang:Math Geometry

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Description

Compute the difference between two angles.

Demo Code


//package com.java2s;

public class Main {
    /** Compute the difference between two angles.
     * The resulting angle is in the range of -pi..+pi if the input angle are
     * also in this range./*from   ww  w  .  jav a 2s .co  m*/
     */
    public static float angleDif(float a1, float a2) {
        double val = a1 - a2;
        if (val > Math.PI) {
            val -= 2. * Math.PI;
        }
        if (val < -Math.PI) {
            val += 2. * Math.PI;
        }
        return (float) val;
    }

    /** Compute the difference between two angles.
     * The resulting angle is in the range of -pi..+pi if the input angle are
     * also in this range.
     */
    public static double angleDif(double a1, double a2) {
        double val = a1 - a2;
        if (val > Math.PI) {
            val -= 2. * Math.PI;
        }
        if (val < -Math.PI) {
            val += 2. * Math.PI;
        }
        return val;
    }
}

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