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00001 
00007 /* Copyright, 2001 Nevrax Ltd.
00008  *
00009  * This file is part of NEVRAX NEL.
00010  * NEVRAX NEL is free software; you can redistribute it and/or modify
00011  * it under the terms of the GNU General Public License as published by
00012  * the Free Software Foundation; either version 2, or (at your option)
00013  * any later version.
00014 
00015  * NEVRAX NEL is distributed in the hope that it will be useful, but
00016  * WITHOUT ANY WARRANTY; without even the implied warranty of
00017  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
00018  * General Public License for more details.
00019 
00020  * You should have received a copy of the GNU General Public License
00021  * along with NEVRAX NEL; see the file COPYING. If not, write to the
00022  * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
00023  * MA 02111-1307, USA.
00024  */
00025 
00026 #ifndef NL_PS_PLANE_BASIS_H
00027 #define NL_PS_PLANE_BASIS_H
00028 
00029 #include "nel/misc/types_nl.h"
00030 #include "nel/misc/vector.h"
00031 #include "nel/misc/matrix.h"
00032 #include "3d/ps_util.h"
00033 
00034 
00035 namespace NL3D {
00036 
00037 
00038 
00039 
00040 
00045 struct CPlaneBasis
00046 {       
00047         NLMISC::CVector X ;
00048         NLMISC::CVector Y ;
00049 
00050 
00051         // default ctor
00052         CPlaneBasis() {}
00053 
00054         
00055         // construct this basis by giving a normal to the plane that contains it
00056         CPlaneBasis(const NLMISC::CVector &normal)
00057         {
00058                 NLMISC::CMatrix mat;
00059                 CPSUtil::buildSchmidtBasis(normal, mat) ;
00060                 X = mat.getI() ;
00061                 Y = mat.getJ() ;
00062         }
00063 
00064         // construct this basis by giving its X and Y vectors
00065         CPlaneBasis(const NLMISC::CVector &x, const NLMISC::CVector &y) : X(x), Y(y)
00066         {               
00067         }
00068 
00070         NLMISC::CVector getNormal(void) const
00071         {
00072                 return X ^ Y ;
00073         }
00074 
00075 
00076         void serial(NLMISC::IStream &f) throw(NLMISC::EStream)
00077         {
00078                 f.serial(X, Y) ;
00079         }
00080 } ;
00081 
00082 
00083 // for map insertion
00084 
00085 inline bool operator<(const CPlaneBasis &p1, const CPlaneBasis &p2)
00086 {
00087         if (p1.X < p2.X) return true ;
00088         else if (p1.X == p2.X) return false ;
00089                 else if (p1.Y < p2.Y) return true ;
00090                         else if (p1.X == p2.Y) return false ;
00091                                 else return true ;
00092 }
00093 
00094 
00095 
00096 
00097 
00098 
00099 } // NL3D
00100 
00101 
00102 #endif // NL_PS_PLANE_BASIS_H
00103 
00104 /* End of ps_plane_basis.h */