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poly2d.h
Go to the documentation of this file.00001 /* 00002 Copyright (C) 1998,2000 by Jorrit Tyberghein 00003 00004 This library is free software; you can redistribute it and/or 00005 modify it under the terms of the GNU Library General Public 00006 License as published by the Free Software Foundation; either 00007 version 2 of the License, or (at your option) any later version. 00008 00009 This library is distributed in the hope that it will be useful, 00010 but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00012 Library General Public License for more details. 00013 00014 You should have received a copy of the GNU Library General Public 00015 License along with this library; if not, write to the Free 00016 Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 00017 */ 00018 00019 #ifndef __CS_POLY2D_H__ 00020 #define __CS_POLY2D_H__ 00021 00028 #include "csextern.h" 00029 00030 #include "csgeom/math2d.h" 00031 #include "csgeom/box.h" 00032 00033 struct iClipper2D; 00034 00038 class CS_CSGEOM_EXPORT csPoly2D 00039 { 00040 protected: 00042 csVector2* vertices; 00044 int num_vertices; 00046 int max_vertices; 00047 public: 00051 csPoly2D (int start_size = 10); 00052 00054 csPoly2D (const csPoly2D& copy); 00055 00057 ~csPoly2D (); 00058 00060 csPoly2D& operator= (const csPoly2D& other); 00061 00065 void MakeEmpty (); 00066 00070 int GetVertexCount () const { return num_vertices; } 00071 00075 csVector2* GetVertices () { return vertices; } 00076 00080 const csVector2* GetVertices () const { return vertices; } 00081 00085 csVector2* GetVertex (int i) 00086 { 00087 if (i<0 || i>=num_vertices) return 0; 00088 return &vertices[i]; 00089 } 00090 00094 csVector2& operator[] (int i) 00095 { 00096 CS_ASSERT (i >= 0 && i < num_vertices); 00097 return vertices[i]; 00098 } 00099 00103 const csVector2& operator[] (int i) const 00104 { 00105 CS_ASSERT (i >= 0 && i < num_vertices); 00106 return vertices[i]; 00107 } 00108 00112 csVector2* GetFirst () 00113 { if (num_vertices<=0) return 0; else return vertices; } 00114 00118 csVector2* GetLast () 00119 { if (num_vertices<=0) return 0; else return &vertices[num_vertices-1]; } 00120 00124 bool In (const csVector2& v); 00125 00129 static bool In (csVector2* poly, int num_poly, const csVector2& v); 00130 00134 void MakeRoom (int new_max); 00135 00139 void SetVertexCount (int n) 00140 { 00141 MakeRoom (n); 00142 num_vertices = n; 00143 } 00144 00149 int AddVertex (const csVector2& v) { return AddVertex (v.x, v.y); } 00150 00155 int AddVertex (float x, float y); 00156 00161 void SetVertices (csVector2 const* v, int num) 00162 { 00163 MakeRoom (num); 00164 memcpy (vertices, v, (num_vertices = num) * sizeof (csVector2)); 00165 } 00166 00175 bool ClipAgainst (iClipper2D* view); 00176 00185 void Intersect (const csPlane2& plane, csPoly2D& left, 00186 csPoly2D& right) const; 00187 00192 void ClipPlane (const csPlane2& plane, csPoly2D& right) const; 00193 00202 void ExtendConvex (const csPoly2D& other, int this_edge); 00203 00207 float GetSignedArea(); 00208 00214 void Random (int num, const csBox2& max_bbox); 00215 }; 00216 00222 class csPoly2DFactory 00223 { 00224 public: 00226 CS_DECLARE_STATIC_CLASSVAR(sharedFactory,SharedFactory,csPoly2DFactory) 00227 00228 00229 virtual csPoly2D* Create () 00230 { 00231 csPoly2D* p = new csPoly2D (); 00232 return p; 00233 } 00234 }; 00235 00238 #endif // __CS_POLY2D_H__
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