Java Distance Calculate distHalf(double angA, double angB)

Description

Angular distance between two half circle angles.

License

Open Source License

Parameter

Parameter	Description
angA	Angle between -pi/2 and pi/2.
angB	Angle between -pi/2 and pi/2.

Return

Acute angle between the two input angles.

Declaration

public static double distHalf(double angA, double angB) 

Method Source Code

//package com.java2s;
/*//from   www.  java  2 s .co m
 * Copyright (c) 2011-2012, Peter Abeles. All Rights Reserved.
 *
 * This file is part of Geometric Regression Library (GeoRegression).
 *
 * GeoRegression is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation, either version 3
 * of the License, or (at your option) any later version.
 *
 * JGRL is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with GeoRegression.  If not, see <http://www.gnu.org/licenses/>.
 */

public class Main {
    /**
     * Angular distance between two half circle angles.
     *
     * @param angA Angle between -pi/2 and pi/2.
     * @param angB Angle between -pi/2 and pi/2.
     * @return Acute angle between the two input angles.
     */
    public static double distHalf(double angA, double angB) {
        double a = Math.abs(angA - angB);
        if (a <= Math.PI / 2)
            return a;
        else
            return Math.PI - a;
    }
}

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