1 /**********
2 *
3 * Copyright (c) 2003, Division of Imaging Science and Biomedical Engineering,
4 * University of Manchester, UK. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without modification,
7 * are permitted provided that the following conditions are met:
8 *
9 * . Redistributions of source code must retain the above copyright notice,
10 * this list of conditions and the following disclaimer.
11 *
12 * . Redistributions in binary form must reproduce the above copyright notice,
13 * this list of conditions and the following disclaimer in the documentation
14 * and/or other materials provided with the distribution.
15 *
16 * . Neither the name of the University of Manchester nor the names of its
17 * contributors may be used to endorse or promote products derived from this
18 * software without specific prior written permission.
19 *
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
25 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
31 * POSSIBILITY OF SUCH DAMAGE.
32 *
33 **********
34 *
35 * Program : TINA
36 * File : $Source: /home/tina/cvs/tina-libs/tina/math/mathGeom_hull2.c,v $
37 * Date : $Date: 2003/09/23 11:32:20 $
38 * Version : $Revision: 1.4 $
39 * CVS Id : $Id: mathGeom_hull2.c,v 1.4 2003/09/23 11:32:20 matts Exp $
40 *
41 * Author : Legacy TINA
42 *
43 * Notes : Find max and min x,y extent of a set of vectors sequentially
44 *
45 *********
46 */
47 /**
48 * @file
49 * @brief Maths function for 2D hull extension.
50 *
51 *
52 *
53 */
54
55 #include "mathGeom_hull2.h"
56
57 #if HAVE_CONFIG_H
58 #include <config.h>
59 #endif
60
61 #include <tina/sys/sysDef.h>
62 #include <tina/math/math_GeomDef.h>
63 #include <tina/math/mathGeom_vec2.h>
64
65
66 void vec2_extend_hull(Vec2 * vmin, Vec2 * vmax, Vec2 v)
67 {
68 double xmin = vec2_x(*vmin), ymin = vec2_y(*vmin);
69 double xmax = vec2_x(*vmax), ymax = vec2_y(*vmax);
70 double s;
71
72 s = vec2_x(v);
73 if (s < xmin)
74 xmin = s;
75 if (s > xmax)
76 xmax = s;
77 s = vec2_y(v);
78 if (s < ymin)
79 ymin = s;
80 if (s > ymax)
81 ymax = s;
82 *vmin = vec2(xmin, ymin);
83 *vmax = vec2(xmax, ymax);
84 }
85
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