/* * __ .__ .__ ._____. * _/ |_ _______ __|__| ____ | | |__\_ |__ ______ * \ __\/ _ \ \/ / |/ ___\| | | || __ \ / ___/ * | | ( <_> > <| \ \___| |_| || \_\ \\___ \ * |__| \____/__/\_ \__|\___ >____/__||___ /____ > * \/ \/ \/ \/ * * 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 toxi.music.scale; import toxi.math.MathUtils; /** * * @author tux */ public abstract class AbstractScale { /** * */ public static final int OCTAVE_RANGE = 2; /** * */ public static final float HALFTONE_STEP = (float) Math.pow(2, 1 / 12.0); /** * */ public static final float INV_HALFTONE = 1 / 12.0f; /** * */ public byte[] tones; /** * */ protected String name; /** * * @param name * @param tones */ public AbstractScale(String name, byte[] tones) { this.name = name; this.tones = tones; } /** * * @return */ public String getName() { return name; } /** * * @param st * @return */ public float getPitchForScaleTone(int st) { return getPitchForScaleTone(st, tones.length, 0); } /** * * @param semiTone * @param limit * @param transpose * @return */ public float getPitchForScaleTone(int semiTone, int limit, int transpose) { limit = MathUtils.min(limit, tones.length); int octave = semiTone / limit; semiTone %= limit; if (semiTone < 0) { semiTone += limit; octave--; } return (float) Math.pow(2, (octave * 12 + tones[semiTone] + transpose) / 12.0); } /** * * @param st * @return */ public float getPitchForSemitone(int st) { return (float) Math.pow(2, st / 12.0); } }