00001 /* $Id: site.h,v 1.2 2005/02/24 00:57:33 ellson Exp $ $Revision: 1.2 $ */ 00002 /* vim:set shiftwidth=4 ts=8: */ 00003 00004 /********************************************************** 00005 * This software is part of the graphviz package * 00006 * http://www.graphviz.org/ * 00007 * * 00008 * Copyright (c) 1994-2004 AT&T Corp. * 00009 * and is licensed under the * 00010 * Common Public License, Version 1.0 * 00011 * by AT&T Corp. * 00012 * * 00013 * Information and Software Systems Research * 00014 * AT&T Research, Florham Park NJ * 00015 **********************************************************/ 00016 00017 #ifdef __cplusplus 00018 extern "C" { 00019 #endif 00020 00021 00022 00023 #ifndef SITE_H 00024 #define SITE_H 00025 00026 #include "geometry.h" 00027 00028 /* Sites are also used as vertices on line segments */ 00029 typedef struct Site { 00030 Point coord; 00031 int sitenbr; 00032 int refcnt; 00033 } Site; 00034 00035 extern int siteidx; 00036 extern Site *bottomsite; 00037 00038 extern void siteinit(void); 00039 extern Site *getsite(void); 00040 extern double dist(Site *, Site *); /* Distance between two sites */ 00041 extern void deref(Site *); /* Increment refcnt of site */ 00042 extern void ref(Site *); /* Decrement refcnt of site */ 00043 extern void makevertex(Site *); /* Transform a site into a vertex */ 00044 #endif 00045 00046 #ifdef __cplusplus 00047 } 00048 #endif