Panda3D

geometricBoundingVolume.h

00001 // Filename: geometricBoundingVolume.h
00002 // Created by:  drose (07Oct99)
00003 //
00004 ////////////////////////////////////////////////////////////////////
00005 //
00006 // PANDA 3D SOFTWARE
00007 // Copyright (c) Carnegie Mellon University.  All rights reserved.
00008 //
00009 // All use of this software is subject to the terms of the revised BSD
00010 // license.  You should have received a copy of this license along
00011 // with this source code in a file named "LICENSE."
00012 //
00013 ////////////////////////////////////////////////////////////////////
00014 
00015 #ifndef GEOMETRICBOUNDINGVOLUME_H
00016 #define GEOMETRICBOUNDINGVOLUME_H
00017 
00018 #include "pandabase.h"
00019 
00020 #include "boundingVolume.h"
00021 
00022 #include "luse.h"
00023 #include "lmatrix.h"
00024 
00025 ////////////////////////////////////////////////////////////////////
00026 //       Class : GeometricBoundingVolume
00027 // Description : This is another abstract class, for a general class
00028 //               of bounding volumes that actually enclose points in
00029 //               3-d space, such as BSP's and bounding spheres.
00030 ////////////////////////////////////////////////////////////////////
00031 class EXPCL_PANDA_MATHUTIL GeometricBoundingVolume : public BoundingVolume {
00032 public:
00033   INLINE_MATHUTIL GeometricBoundingVolume();
00034 
00035 PUBLISHED:
00036   INLINE_MATHUTIL bool extend_by(const GeometricBoundingVolume *vol);
00037   INLINE_MATHUTIL bool extend_by(const LPoint3f &point);
00038 
00039   // It might be nice to make these template member functions so we
00040   // could have true STL-style first/last iterators, but that's
00041   // impossible for virtual functions.
00042   INLINE_MATHUTIL bool around(const GeometricBoundingVolume **first,
00043                      const GeometricBoundingVolume **last);
00044   INLINE_MATHUTIL bool around(const LPoint3f *first,
00045                      const LPoint3f *last);
00046 
00047   INLINE_MATHUTIL int contains(const GeometricBoundingVolume *vol) const;
00048   INLINE_MATHUTIL int contains(const LPoint3f &point) const;
00049   INLINE_MATHUTIL int contains(const LPoint3f &a, const LPoint3f &b) const;
00050 
00051   virtual LPoint3f get_approx_center() const=0;
00052   virtual void xform(const LMatrix4f &mat)=0;
00053 
00054 public:
00055   virtual const GeometricBoundingVolume *as_geometric_bounding_volume() const;
00056 
00057 protected:
00058   // Some virtual functions to implement fundamental bounding
00059   // operations on points in 3-d space.
00060 
00061   virtual bool extend_by_point(const LPoint3f &point);
00062   virtual bool around_points(const LPoint3f *first,
00063                              const LPoint3f *last);
00064   virtual int contains_point(const LPoint3f &point) const;
00065   virtual int contains_lineseg(const LPoint3f &a, const LPoint3f &b) const;
00066 
00067 
00068 public:
00069   static TypeHandle get_class_type() {
00070     return _type_handle;
00071   }
00072   static void init_type() {
00073     BoundingVolume::init_type();
00074     register_type(_type_handle, "GeometricBoundingVolume",
00075                   BoundingVolume::get_class_type());
00076   }
00077   virtual TypeHandle get_type() const {
00078     return get_class_type();
00079   }
00080   virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
00081 
00082 private:
00083   static TypeHandle _type_handle;
00084 };
00085 
00086 #include "geometricBoundingVolume.I"
00087 
00088 #endif
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