001/* =========================================================== 002 * Orson Charts : a 3D chart library for the Java(tm) platform 003 * =========================================================== 004 * 005 * (C)opyright 2013-2016, by Object Refinery Limited. All rights reserved. 006 * 007 * http://www.object-refinery.com/orsoncharts/index.html 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 com.orsoncharts.graphics3d; 034 035import java.util.List; 036 037/** 038 * An interface that must be implemented by objects that can sort faces prior 039 * to rendering (the Painter's algorithm). 040 * 041 * @since 1.3 042 */ 043public interface FaceSorter { 044 045 /** 046 * Returns a list of faces in the order that they should be painted. 047 * 048 * @param faces the faces before sorting ({@code null} not permitted). 049 * @param eyePts the points in 3D space relative to the viewing position. 050 * 051 * @return An ordered list (note that the result may be the same list 052 * passed in via the {@code faces} argument). 053 */ 054 List<Face> sort(List<Face> faces, Point3D[] eyePts); 055 056}