C:/Projects/ngn/include/frustum.h

/***************************************************************************
 *            frustum.h
 *
 *  Tue Jan  6 06:48:42 2004
 *  Copyright  2004  thierry schartz
 *  Email thierry.schartz@bluebottle.com
 ****************************************************************************/
/*
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Library General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 */
 /*     This code was taken and adapted from http://www.GameTutorials.com. Thanks to them !!!
                DigiBen@GameTutorials.com
                http://www.GameTutorials.com
 */
 #ifndef _FRUSTUM_H
 #define _FRUSTUM_H
 
#ifdef WIN32
#include <windows.h>
#endif

 
#include "vector3d.h"
#include "box.h"
#include "light.h"

#define COMPLETE_OUT 0
#define INTERSECT    1
#define COMPLETE_IN  2


namespace ngn {
        namespace core {


                        enum eFrustumSide
                        {
                                RIGHT   = 0,       
                                LEFT    = 1,       
                                BOTTOM  = 2,      
                                TOP     = 3,       
                                BACK    = 4,     
                                FRONT   = 5      
                        }; 

                        enum ePlane
                        {
                                // Ax + By + Cz + D
                                A=1,
                                B=2,
                                C=3,
                                D=4
                        };
 

                        class Frustum
                         {
                                public:
                                        Frustum();
                                        Frustum( const Frustum& other );
                                        virtual ~Frustum();
                                        void calculateFrustum();
                                        bool pointInFrustum( Vector3df p ) const;
                                        bool sphereInFrustum( Vector3df center, float radius )const;
                                        bool cubeInFrustum( Vector3df center, float halfsize )const;
                                        int boxInFrustum( float x, float y, float z, float x2, float y2, float z2 )const;
                                        int boxInFrustum( Vector3df min, Vector3df max )const;
                                        int boxInFrustum( Box& box ) const; 
                                        bool lightInFrustum( Light& light ) const;

                                private:
                                        void normalizePlane( float frustum[6][4], int side );

                                        float m_frustum[6][4];  // the frustum
                        };




                 }//core
}//ngn
#endif /* _FRUSTUM_H */

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