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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_FRUSTUM_H
00027 #define NL_FRUSTUM_H
00028 
00029 #include "nel/misc/types_nl.h"
00030 #include "nel/misc/vector.h"
00031 
00032 
00033 namespace NL3D
00034 {
00035 
00036 using NLMISC::CVector;
00037 
00038 
00039 // ***************************************************************************
00046 class CFrustum
00047 {
00048 public:
00050         float                   Left, Right, Bottom, Top, Near, Far;
00051         bool                    Perspective;
00052 
00053 
00055         CFrustum() {}
00057         CFrustum(float left, float right, float bottom, float top, float znear, float zfar, bool perspective= true)
00058         {
00059                 init( left,  right,  bottom,  top,  znear,  zfar, perspective);
00060         }
00061 
00062 
00064         void                    init(float left, float right, float bottom, float top, float znear, float zfar, bool perspective= true);
00065 
00067         void                    init(float width, float height, float znear, float zfar, bool perspective= true);
00068 
00075         void                    initPerspective(float fov, float aspectRatio, float znear, float zfar);
00076 
00078         void                    getValues(float &left, float &right, float &bottom, float &top, float &znear, float &zfar) const;
00079 
00080 
00085         CVector                 project(const CVector &vec) const;
00086 
00091         CVector                 unProject(const CVector &vec) const;
00092 };
00093 
00094 
00095 } // NL3D
00096 
00097 
00098 #endif // NL_FRUSTUM_H
00099 
00100 /* End of frustum.h */