/* * The JTS Topology Suite is a collection of Java classes that * implement the fundamental operations required to validate a given * geo-spatial data set to a known topological specification. * * Copyright (C) 2001 Vivid Solutions * * 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. * * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * For more information, contact: * * Vivid Solutions * Suite #1A * 2328 Government Street * Victoria BC V8T 5G5 * Canada * * (250)385-6040 * www.vividsolutions.com */ package com.vividsolutions.jts.triangulate.quadedge; import java.util.ArrayList; import java.util.List; /** * Utilities for working with {@link QuadEdge}s. * * @author mbdavis * */ public class QuadEdgeUtil { /** * Gets all edges which are incident on the origin of the given edge. * * @param start * the edge to start at * @return a List of edges which have their origin at the origin of the given * edge */ public static List findEdgesIncidentOnOrigin(QuadEdge start) { List incEdge = new ArrayList(); QuadEdge qe = start; do { incEdge.add(qe); qe = qe.oNext(); } while (qe != start); return incEdge; } }