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00001 
00007 /* Copyright, 2000 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_PLANE_H
00027 #define NL_PLANE_H
00028 
00029 
00030 #include        "nel/misc/stream.h"
00031 #include        "nel/misc/vector.h"
00032 
00033 
00034 namespace NLMISC
00035 {
00036 
00037 
00038 // ======================================================================================================
00049 class CPlane
00050 {
00051 public:
00052         float   a,b,c,d;
00053 
00054 public:
00055 
00057 
00058 
00059         CPlane() {}
00061         CPlane(float _a, float _b, float _c, float _d) : a(_a), b(_b), c(_c), d(_d) {}
00063         CPlane(const CPlane &v) : a(v.a), b(v.b), c(v.c), d(v.d) {}
00065 
00066 
00068 
00069 
00073         void    make(const CVector &normal, const CVector &pos);
00078         void    make(const CVector &p0, const CVector &p1, const CVector &p2);
00084         CVector getNormal() const;
00088         void    normalize();
00092         CPlane  normed() const;
00094 
00095 
00097 
00098 
00103         float   distance(const CVector &p) const;
00105         float   operator*(const CVector &p) const;
00107         CVector intersect(const CVector &p0,const CVector &p1) const;
00109         CVector project(const CVector &p0) const;
00110 
00117         bool    clipSegmentBack(CVector &p0, CVector &p1) const;
00124         bool    clipSegmentFront(CVector &p0, CVector &p1) const;
00125 
00133         sint    clipPolygonBack(CVector in[], CVector out[], sint nIn) const;
00141         sint    clipPolygonFront(CVector in[], CVector out[], sint nIn) const;
00143 
00145 
00146 
00147                 CPlane  inverted() const;
00148 
00150                 void    invert();
00152 
00154 
00155         void    serial(IStream &f)
00156         {
00157                 f.serial(a,b,c,d);
00158         }
00160 
00161 };
00162 
00163 
00164 }
00165 
00166 
00167 #include "nel/misc/plane_inline.h"
00168 
00169 
00170 #endif // NL_PLANE_H
00171 
00172 /* End of plane.h */