/*******************************************************************************
* Breakout Cave Survey Visualizer
*
* Copyright (C) 2014 James Edwards
*
* jedwards8 at fastmail dot fm
*
* 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., 51
* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*******************************************************************************/
package org.andork.math.misc;
public class AngleUtils {
public static double angle(double a, double b) {
double result = Math.abs(a - b) % (Math.PI * 2.0);
return result > Math.PI ? Math.PI * 2.0 - result : result;
}
public static double clockwiseBisect(double a, double b) {
return a + 0.5 * clockwiseRotation(a, b);
}
public static double clockwiseRotation(double a, double b) {
double diff = (b - a) % (Math.PI * 2.0);
return diff < 0.0 ? diff + Math.PI * 2.0 : diff;
}
public static double counterclockwiseRotation(double a, double b) {
return Math.PI * 2.0 - clockwiseRotation(a, b);
}
public static double oppositeAngle(double angle) {
angle = (angle + Math.PI) % (Math.PI * 2);
return angle < 0 ? angle + Math.PI * 2 : angle;
}
public static double rotation(double a, double b) {
double result = (b - a) % (Math.PI * 2.0);
if (result < -Math.PI) {
result += Math.PI * 2.0;
}
if (result > Math.PI) {
result -= Math.PI * 2.0;
}
return result;
}
}