001 /* 002 * Copyright (C) 2008-2010 by Holger Arndt 003 * 004 * This file is part of the Universal Java Matrix Package (UJMP). 005 * See the NOTICE file distributed with this work for additional 006 * information regarding copyright ownership and licensing. 007 * 008 * UJMP is free software; you can redistribute it and/or modify 009 * it under the terms of the GNU Lesser General Public License as 010 * published by the Free Software Foundation; either version 2 011 * of the License, or (at your option) any later version. 012 * 013 * UJMP is distributed in the hope that it will be useful, 014 * but WITHOUT ANY WARRANTY; without even the implied warranty of 015 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 016 * GNU Lesser General Public License for more details. 017 * 018 * You should have received a copy of the GNU Lesser General Public 019 * License along with UJMP; if not, write to the 020 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, 021 * Boston, MA 02110-1301 USA 022 */ 023 024 package org.ujmp.core.doublematrix.calculation.general.misc; 025 026 import org.ujmp.core.Coordinates; 027 import org.ujmp.core.Matrix; 028 import org.ujmp.core.doublematrix.calculation.AbstractDoubleCalculation; 029 import org.ujmp.core.exceptions.MatrixException; 030 031 public class FadeOut extends AbstractDoubleCalculation { 032 private static final long serialVersionUID = -2366094848097068297L; 033 034 public FadeOut(int dimension, Matrix matrix) { 035 super(dimension, matrix); 036 } 037 038 039 public double getDouble(long... coordinates) throws MatrixException { 040 double factor = 0.0; 041 switch (getDimension()) { 042 case Matrix.COLUMN: 043 factor = 1.0 - (double) coordinates[COLUMN] 044 / (double) (getSource().getColumnCount() - 1); 045 break; 046 case Matrix.ROW: 047 factor = 1.0 - (double) coordinates[ROW] / (double) (getSource().getRowCount() - 1); 048 break; 049 default: 050 factor = 1.0 - (double) Coordinates.product(coordinates) 051 / (double) (getSource().getRowCount() - 1); 052 break; 053 } 054 return getSource().getAsDouble(coordinates) * factor; 055 } 056 }