Creates a single normalized impulse signal with its peak at t=1/k. - Java java.lang

Java examples for java.lang:Math Function

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Description

Creates a single normalized impulse signal with its peak at t=1/k.

Demo Code

/*/*  w ww  .j a va  2  s  .co m*/
 *   __               .__       .__  ._____.           
 * _/  |_  _______  __|__| ____ |  | |__\_ |__   ______
 * \   __\/  _ \  \/  /  |/ ___\|  | |  || __ \ /  ___/
 *  |  | (  <_> >    <|  \  \___|  |_|  || \_\ \\___ \ 
 *  |__|  \____/__/\_ \__|\___  >____/__||___  /____  >
 *                   \/       \/             \/     \/ 
 *
 * Copyright (c) 2006-2011 Karsten Schmidt
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * http://creativecommons.org/licenses/LGPL/2.1/
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */
//package com.java2s;

public class Main {
    /**
     * Creates a single normalized impulse signal with its peak at t=1/k. The
     * attack and decay period is configurable via the k parameter. Code from:
     * http://www.iquilezles.org/www/articles/functions/functions.htm
     * 
     * @param k
     *            smoothness
     * @param t
     *            time position (should be >= 0)
     * @return impulse value (as double)
     */
    public static double impulse(double k, double t) {
        double h = k * t;
        return h * Math.exp(1.0 - h);
    }

    /**
     * Creates a single normalized impulse signal with its peak at t=1/k. The
     * attack and decay period is configurable via the k parameter. Code from:
     * http://www.iquilezles.org/www/articles/functions/functions.htm
     * 
     * @param k
     *            smoothness
     * @param t
     *            time position (should be >= 0)
     * @return impulse value (as float)
     */
    public static float impulse(float k, float t) {
        float h = k * t;
        return (float) (h * Math.exp(1.0f - h));
    }
}

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