csgeom/plane3.h
Go to the documentation of this file.00001 /* 00002 Copyright (C) 1998,1999,2000 by Jorrit Tyberghein 00003 Largely rewritten by Ivan Avramovic <ivan@avramovic.com> 00004 00005 This library is free software; you can redistribute it and/or 00006 modify it under the terms of the GNU Library General Public 00007 License as published by the Free Software Foundation; either 00008 version 2 of the License, or (at your option) any later version. 00009 00010 This library is distributed in the hope that it will be useful, 00011 but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 Library General Public License for more details. 00014 00015 You should have received a copy of the GNU Library General Public 00016 License along with this library; if not, write to the Free 00017 Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 00018 */ 00019 00020 #ifndef __CS_PLANE3_H__ 00021 #define __CS_PLANE3_H__ 00022 00029 #ifndef __CS_CSSYSDEFS_H__ 00030 #error "cssysdef.h must be included in EVERY source file!" 00031 #endif 00032 00033 #include "csextern.h" 00034 00035 #include "csgeom/vector3.h" 00036 00042 class CS_CSGEOM_EXPORT csPlane3 00043 { 00044 public: 00046 csVector3 norm; 00047 00049 float DD; 00050 00054 csPlane3 () : norm(0,0,1), DD(0) {} 00055 00059 csPlane3 (const csVector3& plane_norm, float d=0) : norm(plane_norm), DD(d) {} 00060 00064 csPlane3 (float a, float b, float c, float d=0) : norm(a,b,c), DD(d) {} 00065 00072 csPlane3 (const csVector3& v1, const csVector3& v2, const csVector3& v3); 00073 00079 csPlane3 (const csVector3& v2, const csVector3& v3) 00080 { 00081 norm = v2 % v3; DD = 0; 00082 } 00083 00085 inline csVector3& Normal () { return norm; } 00087 inline const csVector3& Normal () const { return norm; } 00088 00090 inline float A () const { return norm.x; } 00092 inline float B () const { return norm.y; } 00094 inline float C () const { return norm.z; } 00096 inline float D () const { return DD; } 00097 00099 inline float& A () { return norm.x; } 00101 inline float& B () { return norm.y; } 00103 inline float& C () { return norm.z; } 00105 inline float& D () { return DD; } 00106 00108 inline void Set (float a, float b, float c, float d) 00109 { norm.x = a; norm.y = b; norm.z = c; DD = d; } 00110 00112 inline void Set (const csVector3& normal, float d) 00113 { norm = normal; DD = d; } 00114 00121 void Set (const csVector3& v1, const csVector3& v2, const csVector3& v3); 00122 00128 void Set (const csVector3& v2, const csVector3& v3) 00129 { 00130 norm = v2 % v3; DD = 0; 00131 } 00132 00143 inline float Classify (const csVector3& pt) const { return norm*pt+DD; } 00144 00149 static float Classify (float A, float B, float C, float D, 00150 const csVector3& pt) 00151 { 00152 return A*pt.x + B*pt.y + C*pt.z + D; 00153 } 00154 00161 inline float Distance (const csVector3& pt) const 00162 { return ABS (Classify (pt)); } 00163 00168 void Invert () { norm = -norm; DD = -DD; } 00169 00173 void Normalize () 00174 { 00175 float f = norm.Norm (); 00176 if (f) { norm /= f; DD /= f; } 00177 } 00178 00189 bool ClipPolygon (csVector3*& pverts, int& num_verts, bool reversed = false); 00190 }; 00191 00194 #endif // __CS_PLANE3_H__ 00195
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