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 GEOMETRY_H
21#define GEOMETRY_H
22
23#ifdef HAVE_POINTF_S
24 typedef pointf Point;
25#else
26 typedef struct Point {
27 double x, y;
28 } Point;
29#endif
30
31 extern Point origin;
32
33 extern double xmin, xmax, ymin, ymax; /* extreme x,y values of sites */
34 extern double deltax, deltay; /* xmax - xmin, ymax - ymin */
35
36 extern int nsites; /* Number of sites */
37 extern int sqrt_nsites;
38
39 extern void geominit(void);
40 extern double dist_2(Point *, Point *); /* Distance squared between two points */
41 extern void subpt(Point * a, Point b, Point c);
42 extern void addpt(Point * a, Point b, Point c);
43 extern double area_2(Point a, Point b, Point c);
44 extern int leftOf(Point a, Point b, Point c);
45 extern int intersection(Point a, Point b, Point c, Point d, Point * p);
46
47#endif
48
49
50#ifdef __cplusplus
51}
52#endif
53