pointset_math.h

Go to the documentation of this file.
00001 /*
00002 **  ClanLib SDK
00003 **  Copyright (c) 1997-2011 The ClanLib Team
00004 **
00005 **  This software is provided 'as-is', without any express or implied
00006 **  warranty.  In no event will the authors be held liable for any damages
00007 **  arising from the use of this software.
00008 **
00009 **  Permission is granted to anyone to use this software for any purpose,
00010 **  including commercial applications, and to alter it and redistribute it
00011 **  freely, subject to the following restrictions:
00012 **
00013 **  1. The origin of this software must not be misrepresented; you must not
00014 **     claim that you wrote the original software. If you use this software
00015 **     in a product, an acknowledgment in the product documentation would be
00016 **     appreciated but is not required.
00017 **  2. Altered source versions must be plainly marked as such, and must not be
00018 **     misrepresented as being the original software.
00019 **  3. This notice may not be removed or altered from any source distribution.
00020 **
00021 **  Note: Some of the libraries ClanLib may link to may have additional
00022 **  requirements or restrictions.
00023 **
00024 **  File Author(s):
00025 **
00026 **    Emanuel Griesen
00027 **    Harry Storbacka
00028 */
00029 
00032 
00033 #pragma once
00034 
00035 #include "../api_core.h"
00036 #include <vector>
00037 #include "point.h"
00038 #include "circle.h"
00039 #include "rect.h"
00040 
00044 class CL_API_CORE CL_PointSetMath
00045 {
00048 public:
00052         static CL_Circlef minimum_enclosing_disc(
00053                 const std::vector<CL_Pointf> &points);
00054 
00058         static std::vector<CL_Pointf> convex_hull_from_polygon(std::vector<CL_Pointf> &points);
00059 
00060         static CL_Rect bounding_box(const std::vector<CL_Pointf> &points);
00061 
00065 private:
00066         static void calculate_minimum_enclosing_disc(
00067                 CL_Circlef &smalldisc,
00068                 const std::vector<CL_Pointf> &points,
00069                 int start,
00070                 int end);
00071 
00072         static void minimum_disc_with_1point(
00073                 CL_Circlef &smalldisc,
00074                 const std::vector<CL_Pointf> &points,
00075                 int start,
00076                 unsigned int i);
00077 
00078         static void minimum_disc_with_2points(
00079                 CL_Circlef &smalldisc,
00080                 const std::vector<CL_Pointf> &points,
00081                 int start,
00082                 unsigned int i,
00083                 unsigned int j);
00084 
00085         static void minimum_disc_with_3points(
00086                 CL_Circlef &smalldisc,
00087                 const std::vector<CL_Pointf> &points,
00088                 unsigned int i,
00089                 unsigned int j,
00090                 unsigned int k);
00091 
00092         friend class CL_OutlineMath;
00094 };
00095