Returns the input angle put into the 2pi radian range centered on the input center, [center-pi, center+pi) - Java 2D Graphics

Java examples for 2D Graphics:Angle

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Description

Returns the input angle put into the 2pi radian range centered on the input center, [center-pi, center+pi)

Demo Code

/**//w  ww .java2s  .  c  om
 * Copyright (c) 2013 Oculus Info Inc.
 * http://www.oculusinfo.com/
 *
 * Released under the MIT License.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
 * of the Software, and to permit persons to whom the Software is furnished to do
 * so, subject to the following conditions:

 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
//package com.java2s;

public class Main {
    public static void main(String[] argv) throws Exception {
        double center = 2.45678;
        double angle = 2.45678;
        System.out.println(intoRangeRadians(center, angle));
    }

    /**
     * Returns the input angle put into the 2pi radian range centered on the
     * input center, <code>[center-pi, center+pi)</code>
     * 
     * @param center
     *            The center of the desired output range
     * @param angle
     *            The angle to return in the given range
     * @return <code>angle</code>, but specified in the given range, in radians.
     */
    public static double intoRangeRadians(double center, double angle) {
        return intoRange(center, angle, Math.PI * 2.0);
    }

    /**
     * Essentially number mod modulus, but with the ability to specify the
     * output range.
     * 
     * @param center
     *            The center of the desired output range
     * @param number
     *            The number in question
     * @param modulus
     *            The modulus - i.e., the width of the range
     * @returnthe equivalent of number, mod modulus, centered on the given
     *            center (i.e., in the range [center-modulus/2,
     *            center+modulus/2))
     */
    public static double intoRange(double center, double number,
            double modulus) {
        return number - modulus * Math.round((number - center) / modulus);
    }
}

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