Main Page | Modules | Class Hierarchy | Alphabetical List | Class List | File List | Class Members | File Members | Related Pages
polyclip.h
Go to the documentation of this file.00001 /* 00002 Crystal Space polygon clipping routines 00003 Copyright (C) 1998 by Jorrit Tyberghein 00004 Contributed by Ivan Avramovic <ivan@avramovic.com> and 00005 Andrew Zabolotny <bit@eltech.ru> 00006 00007 This library is free software; you can redistribute it and/or 00008 modify it under the terms of the GNU Library General Public 00009 License as published by the Free Software Foundation; either 00010 version 2 of the License, or (at your option) any later version. 00011 00012 This library is distributed in the hope that it will be useful, 00013 but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 Library General Public License for more details. 00016 00017 You should have received a copy of the GNU Library General Public 00018 License along with this library; if not, write to the Free 00019 Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 00020 */ 00021 00022 #ifndef __CS_POLYCLIP_H__ 00023 #define __CS_POLYCLIP_H__ 00024 00031 #include "csextern.h" 00032 00033 #include "csgeom/math2d.h" 00034 #include "csgeom/polypool.h" 00035 #include "igeom/clip2d.h" 00036 00040 class CS_CSGEOM_EXPORT csClipper : public iClipper2D 00041 { 00042 protected: 00044 static csPoly2DPool *polypool; 00045 00047 uint8 mrClipping; 00048 00049 public: 00050 static csPoly2DPool *GetSharedPool (); 00051 00052 public: 00054 csClipper (); 00055 00057 virtual ~csClipper (); 00058 00060 virtual uint8 ClipInPlace (csVector2 *InPolygon, int &InOutCount, 00061 csBox2 &BoundingBox); 00062 00064 uint8 LastClipResult () { return mrClipping; } 00065 00066 SCF_DECLARE_IBASE; 00067 }; 00068 00073 class CS_CSGEOM_EXPORT csBoxClipper : public csClipper 00074 { 00076 csBox2 region; 00078 csVector2 ClipBox [4]; 00079 00081 inline void InitClipBox () 00082 { 00083 ClipBox [0].Set (region.MinX (), region.MinY ()); 00084 ClipBox [1].Set (region.MinX (), region.MaxY ()); 00085 ClipBox [2].Set (region.MaxX (), region.MaxY ()); 00086 ClipBox [3].Set (region.MaxX (), region.MinY ()); 00087 } 00088 00089 public: 00091 csBoxClipper (const csBox2& b) : region (b) 00092 { InitClipBox (); } 00094 csBoxClipper (float x1, float y1, float x2, float y2) : region (x1,y1,x2,y2) 00095 { InitClipBox (); } 00096 00098 virtual uint8 Clip (csVector2 *InPolygon, int InCount, 00099 csVector2 *OutPolygon, int &OutCount); 00100 00102 virtual uint8 Clip (csVector2 *InPolygon, int InCount, 00103 csVector2 *OutPolygon, int &OutCount, csBox2 &BoundingBox); 00104 00106 virtual uint8 Clip (csVector2 *InPolygon, int InCount, 00107 csVector2 *OutPolygon, int &OutCount, csVertexStatus *OutStatus); 00108 00110 virtual int ClassifyBox (const csBox2 &box); 00111 00113 virtual bool IsInside (const csVector2& v) 00114 { return region.In (v.x, v.y); } 00115 00117 virtual int GetVertexCount () 00118 { return 4; } 00119 00121 virtual csVector2 *GetClipPoly () 00122 { return ClipBox; } 00123 00124 virtual ClipperType GetClipperType() const { return clipperBox; } 00125 }; 00126 00137 class CS_CSGEOM_EXPORT csPolygonClipper : public csClipper 00138 { 00140 csVector2 *ClipData; 00142 csVector2 *ClipPoly; 00144 csPoly2D *ClipPoly2D; 00146 int ClipPolyVertices; 00148 csBox2 ClipBox; 00149 00151 void Prepare (); 00152 00153 public: 00155 csPolygonClipper (csPoly2D *Clipper, bool mirror = false, 00156 bool copy = false); 00158 csPolygonClipper (csVector2 *Clipper, int Count, bool mirror = false, 00159 bool copy = false); 00161 virtual ~csPolygonClipper (); 00162 00164 virtual uint8 Clip (csVector2 *InPolygon, int InCount, 00165 csVector2 *OutPolygon, int &OutCount); 00166 00168 virtual uint8 Clip (csVector2 *InPolygon, int InCount, 00169 csVector2 *OutPolygon, int &OutCount, csBox2 &BoundingBox); 00170 00172 virtual uint8 Clip (csVector2 *InPolygon, int InCount, 00173 csVector2 *OutPolygon, int &OutCount, csVertexStatus *OutStatus); 00174 00176 virtual int ClassifyBox (const csBox2 &box); 00177 00179 virtual bool IsInside (const csVector2& v); 00180 00182 virtual int GetVertexCount () { return ClipPolyVertices; } 00183 00185 virtual csVector2 *GetClipPoly () 00186 { return ClipPoly; } 00187 00188 virtual ClipperType GetClipperType() const { return clipperPoly; } 00189 }; 00193 #endif // __CS_POLYCLIP_H__
Generated for Crystal Space by doxygen 1.3.9.1