Here you can find the source of angleDistance(double angle1, double angle2)
public static double angleDistance(double angle1, double angle2)
//package com.java2s; /*// w ww .ja v a 2 s .c o m * Created on 10-feb-2005 * * gvSIG. Sistema de Informaci?n Geogr?fica de la Generalitat Valenciana * * Copyright (C) 2004 IVER T.I. and Generalitat Valenciana. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. * * For more information, contact: * * Generalitat Valenciana * Conselleria d'Infraestructures i Transport * Av. Blasco Ib??ez, 50 * 46010 VALENCIA * SPAIN * * +34 963862235 * gvsig@gva.es * www.gvsig.gva.es * * or * * IVER T.I. S.A * Salamanca 50 * 46005 Valencia * Spain * * +34 963163400 * dac@iver.es */ public class Main { public static double angleDistance(double angle1, double angle2) { if (angle1 < angle2) { return angle2 - angle1; } else { return ((Math.PI * 2) - angle1) + angle2; } } }