001/* =========================================================== 002 * Orson Charts : a 3D chart library for the Java(tm) platform 003 * =========================================================== 004 * 005 * (C)opyright 2013-2022, by David Gilbert. All rights reserved. 006 * 007 * https://github.com/jfree/orson-charts 008 * 009 * This program is free software: you can redistribute it and/or modify 010 * it under the terms of the GNU General Public License as published by 011 * the Free Software Foundation, either version 3 of the License, or 012 * (at your option) any later version. 013 * 014 * This program is distributed in the hope that it will be useful, 015 * but WITHOUT ANY WARRANTY; without even the implied warranty of 016 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 017 * GNU General Public License for more details. 018 * 019 * You should have received a copy of the GNU General Public License 020 * along with this program. If not, see <http://www.gnu.org/licenses/>. 021 * 022 * [Oracle and Java are registered trademarks of Oracle and/or its affiliates. 023 * Other names may be trademarks of their respective owners.] 024 * 025 * If you do not wish to be bound by the terms of the GPL, an alternative 026 * commercial license can be purchased. For details, please see visit the 027 * Orson Charts home page: 028 * 029 * http://www.object-refinery.com/orsoncharts/index.html 030 * 031 */ 032 033package org.jfree.chart3d.data.function; 034 035import java.io.Serializable; 036import org.jfree.chart3d.data.Range; 037import org.jfree.chart3d.data.xyz.XYZDatasetUtils; 038 039/** 040 * Represents a function {@code y = f(x, z)}. 041 * <br><br> 042 * A dataset can be created by sampling a function - see the 043 * {@link XYZDatasetUtils#sampleFunction(Function3D, String, Range, double, Range, double)} 044 * method. In addition, any {@code Function3D} instance can be plotted 045 * by a {@link org.jfree.chart3d.renderer.xyz.SurfaceRenderer}. 046 */ 047public interface Function3D extends Serializable { 048 049 /** 050 * Returns the value of the function ('y') for the specified inputs ('x' 051 * and 'z'). 052 * 053 * @param x the x-value. 054 * @param z the z-value. 055 * 056 * @return The function value. 057 */ 058 double getValue(double x, double z); 059 060}