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 00030 #include "csextern.h" 00031 00032 #include "csgeom/vector3.h" 00033 00034 class csString; 00035 00041 class CS_CRYSTALSPACE_EXPORT csPlane3 00042 { 00043 public: 00045 csVector3 norm; 00046 00048 float DD; 00049 00053 csPlane3 () : norm(0,0,1), DD(0) {} 00054 00058 csPlane3 (const csVector3& plane_norm, float d=0) : norm(plane_norm), DD(d) {} 00059 00063 csPlane3 (float a, float b, float c, float d=0) : norm(a,b,c), DD(d) {} 00064 00071 csPlane3 (const csVector3& v1, const csVector3& v2, const csVector3& v3); 00072 00078 csPlane3 (const csVector3& v2, const csVector3& v3) 00079 { 00080 norm = v2 % v3; DD = 0; 00081 } 00082 00084 inline csVector3& Normal () { return norm; } 00086 inline const csVector3& Normal () const { return norm; } 00087 00089 inline float A () const { return norm.x; } 00091 inline float B () const { return norm.y; } 00093 inline float C () const { return norm.z; } 00095 inline float D () const { return DD; } 00096 00098 inline float& A () { return norm.x; } 00100 inline float& B () { return norm.y; } 00102 inline float& C () { return norm.z; } 00104 inline float& D () { return DD; } 00105 00107 inline const csVector3& GetNormal () const { return norm; } 00108 00110 inline void Set (float a, float b, float c, float d) 00111 { norm.x = a; norm.y = b; norm.z = c; DD = d; } 00112 00114 inline void Set (const csVector3& normal, float d) 00115 { norm = normal; DD = d; } 00116 00123 void Set (const csVector3& v1, const csVector3& v2, const csVector3& v3); 00124 00130 inline void Set (const csVector3& v2, const csVector3& v3) 00131 { 00132 norm = v2 % v3; DD = 0; 00133 } 00134 00139 inline void SetOrigin (const csVector3& p) 00140 { 00141 DD = -norm * p; 00142 } 00143 00154 inline float Classify (const csVector3& pt) const { return norm*pt+DD; } 00155 00160 static float Classify (float A, float B, float C, float D, 00161 const csVector3& pt) 00162 { 00163 return A*pt.x + B*pt.y + C*pt.z + D; 00164 } 00165 00172 inline float Distance (const csVector3& pt) const 00173 { return ABS (Classify (pt)); } 00174 00179 inline void Invert () { norm = -norm; DD = -DD; } 00180 00184 inline void Normalize () 00185 { 00186 float f = norm.Norm (); 00187 if (f) { norm /= f; DD /= f; } 00188 } 00189 00193 csVector3 FindPoint () const; 00194 00205 bool ClipPolygon (csVector3*& pverts, int& num_verts, bool reversed = false); 00206 00208 csString Description() const; 00209 }; 00210 00213 #endif // __CS_PLANE3_H__ 00214
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