/* * __ .__ .__ ._____. * _/ |_ _______ __|__| ____ | | |__\_ |__ ______ * \ __\/ _ \ \/ / |/ ___\| | | || __ \ / ___/ * | | ( <_> > <| \ \___| |_| || \_\ \\___ \ * |__| \____/__/\_ \__|\___ >____/__||___ /____ > * \/ \/ \/ \/ * * 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 spimedb.util.math.waves; /** * <p> * Frequency modulated bandwidth unlimited pure sawtooth wave. Uses a secondary * wave to modulate the frequency of the main wave. * </p> * * <p> * <strong>Note:</strong> You must NEVER call the update() method on the * modulating wave. * </p> */ public class FMSawtoothWave extends AbstractWave { public AbstractWave fmod; public FMSawtoothWave(float phase, float freq, AbstractWave fmod) { super(phase, freq); this.fmod = fmod; } /** * Convenience constructor to create a non frequency modulated sawtooth. * * @param phase * @param freq * base frequency (in radians) * @param amp * @param offset */ public FMSawtoothWave(float phase, float freq, float amp, float offset) { this(phase, freq, amp, offset, new ConstantWave(0)); } public FMSawtoothWave(float phase, float freq, float amp, float offset, AbstractWave fmod) { super(phase, freq, amp, offset); this.fmod = fmod; } /* * (non-Javadoc) * * @see toxi.math.waves.AbstractWave#pop() */ @Override public void pop() { super.pop(); fmod.pop(); } /* * (non-Javadoc) * * @see toxi.math.waves.AbstractWave#push() */ @Override public void push() { super.push(); fmod.push(); } /** * Resets this wave and its modulating wave as well. * * @see AbstractWave#reset() */ public void reset() { super.reset(); fmod.reset(); } /** * Progresses the wave and updates the result value. You must NEVER call the * update() method on the modulating wave since this is handled * automatically by this method. * * @see AbstractWave#update() */ public float update() { value = ((phase / TWO_PI) * 2 - 1) * amp + offset; cyclePhase(frequency + fmod.update()); return value; } }