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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_AABBOX_H
+00027 #define NL_AABBOX_H
+00028 
+00029 #include "nel/misc/types_nl.h"
+00030 #include "nel/misc/vector.h"
+00031 #include "nel/misc/plane.h"
+00032 #include "nel/misc/common.h"
+00033 #include "nel/misc/stream.h"
+00034 
+00035 
+00036 namespace NL3D {
+00037 
+00038 
+00039 using   NLMISC::CVector;
+00040 using   NLMISC::CPlane;
+00041 
+00042 
+00043 // ***************************************************************************
+00051 class CAABBox
+00052 {
+00053 protected:
+00055         CVector                 Center;
+00057         CVector                 HalfSize;
+00058 
+00059 public:
+00060 
+00062         CAABBox() : Center(0,0,0), HalfSize(0,0,0) {}
+00063 
+00064 
+00066         // @{
+00067         void                    setCenter(const CVector &center) {Center= center;}
+00068         void                    setHalfSize(const CVector &hs) {HalfSize= hs;}
+00069         void                    setSize(const CVector &s) {HalfSize= s/2;}
+00071         void                    setMinMax(const CVector &bmin, const CVector &bmax)
+00072         {
+00073                 Center= (bmin+bmax)/2;
+00074                 HalfSize= bmax-Center;
+00075         }
+00080         void                    extend(const CVector &v);
+00082 
+00083 
+00085         // @{
+00086         CVector                 getMin() const {return Center-HalfSize;}
+00087         CVector                 getMax() const {return Center+HalfSize;}
+00088         CVector                 getCenter() const {return Center;}
+00089         CVector                 getHalfSize() const {return HalfSize;}
+00091         CVector                 getSize() const {return HalfSize*2;}
+00093         float                   getRadius() const {return HalfSize.norm();}
+00094         // @}
+00095 
+00097         // @{
+00099         bool                    clipFront(const CPlane &p) const;
+00101         bool                    clipBack(const CPlane &p) const;
+00103         bool                    include(const CVector &a) const;
+00105         bool                    intersect(const CVector &a, const CVector &b, const CVector &c) const;
+00106         // @}
+00107 
+00109         // @{
+00111         void                    makePyramid(CPlane      planes[6]) const;
+00112         // @}
+00113 
+00114         void                    serial(NLMISC::IStream &f);
+00115 };
+00116 
+00117 
+00118 // ***************************************************************************
+00125 class   CAABBoxExt : private CAABBox
+00126 {
+00127 protected:
+00128         float                   RadiusMin, RadiusMax;
+00129 
+00130         void                    updateRadius()
+00131         {
+00132                 // The bounding sphere.
+00133                 RadiusMax= CAABBox::getRadius();
+00134                 // The including sphere.
+00135                 RadiusMin= NLMISC::minof((float)fabs(HalfSize.x), (float)fabs(HalfSize.y), (float)fabs(HalfSize.z));
+00136         }
+00137 
+00138 public:
+00140         CAABBoxExt() {RadiusMin= RadiusMax=0;}
+00142         CAABBoxExt(const CAABBox &o) {RadiusMin= RadiusMax=0; *this=o;}
+00143 
+00144 
+00146         // @{
+00147         void                    setCenter(const CVector &center) {Center= center;}
+00148         void                    setHalfSize(const CVector &hs) {HalfSize= hs; updateRadius();}
+00149         void                    setSize(const CVector &s) {HalfSize= s/2;  updateRadius();}
+00151         void                    setMinMax(const CVector &bmin, const CVector &bmax)
+00152         {
+00153                 Center= (bmin+bmax)/2;
+00154                 HalfSize= bmax-Center;
+00155                 updateRadius();
+00156         }
+00157         CAABBoxExt              &operator=(const CAABBox &o) {Center= o.getCenter(); HalfSize= o.getHalfSize(); updateRadius(); return (*this);}
+00159 
+00160 
+00162         // @{
+00163         CVector                 getMin() const {return CAABBox::getMin();}
+00164         CVector                 getMax() const {return CAABBox::getMax();}
+00165         CVector                 getCenter() const {return Center;}
+00166         CVector                 getHalfSize() const {return HalfSize;}
+00168         CVector                 getSize() const {return HalfSize*2;}
+00170         float                   getRadius() const {return RadiusMax;}
+00171         // @}
+00172 
+00174         // @{
+00176         bool                    clipFront(const CPlane &p) const;
+00178         bool                    clipBack(const CPlane &p) const;
+00180         bool                    intersect(const CVector &a, const CVector &b, const CVector &c) const
+00181                 {return CAABBox::intersect(a,b,c);}
+00182         // @}
+00183 
+00184         void                    serial(NLMISC::IStream &f);
+00185 };
+00186 
+00187 
+00188 } // NL3D
+00189 
+00190 
+00191 #endif // NL_AABBOX_H
+00192 
+00193 /* End of aabbox.h */
+