1/* $Id$ $Revision$ */
2/* vim:set shiftwidth=4 ts=8: */
3
4/*************************************************************************
5 * Copyright (c) 2011 AT&T Intellectual Property
6 * All rights reserved. This program and the accompanying materials
7 * are made available under the terms of the Eclipse Public License v1.0
8 * which accompanies this distribution, and is available at
9 * http://www.eclipse.org/legal/epl-v10.html
10 *
11 * Contributors: See CVS logs. Details at http://www.graphviz.org/
12 *************************************************************************/
13
14#ifdef __cplusplus
15extern "C" {
16#endif
17
18
19
20#ifndef EDGES_H
21#define EDGES_H
22
23#include "site.h"
24
25 typedef struct Edge {
26 double a, b, c; /* edge on line ax + by = c */
27 Site *ep[2]; /* endpoints (vertices) of edge; initially NULL */
28 Site *reg[2]; /* sites forming edge */
29 int edgenbr;
30 } Edge;
31
32#define le 0
33#define re 1
34
35 extern double pxmin, pxmax, pymin, pymax; /* clipping window */
36 extern void edgeinit(void);
37 extern void endpoint(Edge *, int, Site *);
38 extern void clip_line(Edge * e);
39 extern Edge *gvbisect(Site *, Site *);
40
41#endif
42
43#ifdef __cplusplus
44}
45#endif
46