import java.io.File;
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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.
*
*/
public class Main {
/** 2 π. */
private static final double TWO_PI = 2 * Math.PI;
/**
* Normalize an angle in a 2&pi wide interval around a center value.
* This method has three main uses:
*
* - normalize an angle between 0 and 2π:
* a = MathUtils.normalizeAngle(a, Math.PI);
* - normalize an angle between -π and +π
* a = MathUtils.normalizeAngle(a, 0.0);
* - compute the angle between two defining angular positions:
* angle = MathUtils.normalizeAngle(end, start) - start;
*
* Note that due to numerical accuracy and since π cannot be represented
* exactly, the result interval is closed, it cannot be half-closed
* as would be more satisfactory in a purely mathematical view.
* @param a angle to normalize
* @param center center of the desired 2π interval for the result
* @return a-2kπ with integer k and center-π <= a-2kπ <= center+π
* @since 1.2
*/
public static double normalizeAngle(double a, double center) {
return a - TWO_PI * Math.floor((a + Math.PI - center) / TWO_PI);
}
}