pointset_math.h
1 /*
2 ** ClanLib SDK
3 ** Copyright (c) 1997-2013 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 
30 
31 #pragma once
32 
33 #include "../api_core.h"
34 #include <vector>
35 #include "point.h"
36 #include "circle.h"
37 #include "rect.h"
38 
39 namespace clan
40 {
43 
45 class CL_API_CORE PointSetMath
46 {
49 public:
53  static Circlef minimum_enclosing_disc(
54  const std::vector<Pointf> &points);
55 
59  static std::vector<Pointf> convex_hull_from_polygon(std::vector<Pointf> &points);
60 
61  static Rect bounding_box(const std::vector<Pointf> &points);
62 
66 private:
67  static void calculate_minimum_enclosing_disc(
68  Circlef &smalldisc,
69  const std::vector<Pointf> &points,
70  int start,
71  int end);
72 
73  static void minimum_disc_with_1point(
74  Circlef &smalldisc,
75  const std::vector<Pointf> &points,
76  int start,
77  unsigned int i);
78 
79  static void minimum_disc_with_2points(
80  Circlef &smalldisc,
81  const std::vector<Pointf> &points,
82  int start,
83  unsigned int i,
84  unsigned int j);
85 
86  static void minimum_disc_with_3points(
87  Circlef &smalldisc,
88  const std::vector<Pointf> &points,
89  unsigned int i,
90  unsigned int j,
91  unsigned int k);
92 
93  friend class OutlineMath;
95 };
96 
97 }
98 
2D (left,top,right,bottom) rectangle structure - Integer
Definition: rect.h:453
Math operations on outlines.
Definition: outline_math.h:46
Circle - Float.
Definition: circle.h:90
Math operations related to point sets.
Definition: pointset_math.h:45