ClanLib  2.3.7
pointset_math.h
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1 /*
2 ** ClanLib SDK
3 ** Copyright (c) 1997-2011 The ClanLib Team
4 **
5 ** This software is provided 'as-is', without any express or implied
6 ** warranty. In no event will the authors be held liable for any damages
7 ** arising from the use of this software.
8 **
9 ** Permission is granted to anyone to use this software for any purpose,
10 ** including commercial applications, and to alter it and redistribute it
11 ** freely, subject to the following restrictions:
12 **
13 ** 1. The origin of this software must not be misrepresented; you must not
14 ** claim that you wrote the original software. If you use this software
15 ** in a product, an acknowledgment in the product documentation would be
16 ** appreciated but is not required.
17 ** 2. Altered source versions must be plainly marked as such, and must not be
18 ** misrepresented as being the original software.
19 ** 3. This notice may not be removed or altered from any source distribution.
20 **
21 ** Note: Some of the libraries ClanLib may link to may have additional
22 ** requirements or restrictions.
23 **
24 ** File Author(s):
25 **
26 ** Emanuel Griesen
27 ** Harry Storbacka
28 */
29 
32 
33 #pragma once
34 
35 #include "../api_core.h"
36 #include <vector>
37 #include "point.h"
38 #include "circle.h"
39 #include "rect.h"
40 
45 {
48 public:
52  static CL_Circlef minimum_enclosing_disc(
53  const std::vector<CL_Pointf> &points);
54 
58  static std::vector<CL_Pointf> convex_hull_from_polygon(std::vector<CL_Pointf> &points);
59 
60  static CL_Rect bounding_box(const std::vector<CL_Pointf> &points);
61 
65 private:
66  static void calculate_minimum_enclosing_disc(
67  CL_Circlef &smalldisc,
68  const std::vector<CL_Pointf> &points,
69  int start,
70  int end);
71 
72  static void minimum_disc_with_1point(
73  CL_Circlef &smalldisc,
74  const std::vector<CL_Pointf> &points,
75  int start,
76  unsigned int i);
77 
78  static void minimum_disc_with_2points(
79  CL_Circlef &smalldisc,
80  const std::vector<CL_Pointf> &points,
81  int start,
82  unsigned int i,
83  unsigned int j);
84 
85  static void minimum_disc_with_3points(
86  CL_Circlef &smalldisc,
87  const std::vector<CL_Pointf> &points,
88  unsigned int i,
89  unsigned int j,
90  unsigned int k);
91 
92  friend class CL_OutlineMath;
94 };
95