gm_primitive.java

用于GIS(全球地理系统)的分析和处理的代码。

/*
 * This file is part of the GeOxygene project source files. 
 * 
 * GeOxygene aims at providing an open framework which implements OGC/ISO specifications for 
 * the development and deployment of geographic (GIS) applications. It is a open source 
 * contribution of the COGIT laboratory at the Institut G閛graphique National (the French 
 * National Mapping Agency).
 * 
 * See: http://oxygene-project.sourceforge.net 
 *  
 * Copyright (C) 2005 Institut G閛graphique National
 *
 * 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 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 (see file LICENSE if present); if not, write to the Free Software 
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *  
 */

package fr.ign.cogit.geoxygene.spatial.geomprim;

import java.util.HashSet;
import java.util.Set;

import fr.ign.cogit.geoxygene.spatial.geomroot.GM_Object;

/**
  * Classe m鑢e abstraite pour les primitives g閛m閠riques (point, ligne, surface, solide). 
  * Son but est d閒inir l'op閞ation de base "boundary()" qui lie les primitives de diff閞entes dimensions entre elles.
  * Cette op閞ation est red閒inie dans les sous-classes concr鑤es pour assurer un bon typage.
  * Une primitive g閛m閠rique ne peut pas 阾re d閏ompos閑 en autres primitives, 
  * m阭e si elle d閏oup閑 en morceaux de courbes (curve segment) ou en morceaux de surface (surface patch) : 
  * un curve segment et un surface patch ne peuvent pas exister en dehors du contexte d'une primitive.
  * GM_Complex et GM_Primitive partagent les m阭es propri閠閟, sauf qu'un complexe est ferm