Java tutorial
//package com.java2s; /** * Copyright 2008 - 2011 * * Licensed under the Apache License, Version 2.0 (the "License"); you may not * use this file except in compliance with the License. You may obtain a copy of * the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the * License for the specific language governing permissions and limitations under * the License. * * @project loonframework * @author chenpeng * @emailceponline@yahoo.com.cn * @version 0.1 */ public class Main { public static final float PI = 3.1415927f; private static double reduceSinAngle(double radians) { radians %= Math.PI * 2.0; if (Math.abs(radians) > Math.PI) { radians = radians - (Math.PI * 2.0); } if (Math.abs(radians) > Math.PI / 2) { radians = Math.PI - radians; } return radians; } static public final float abs(float n) { return (n < 0) ? -n : n; } static public final int abs(int n) { return (n < 0) ? -n : n; } }