Panda3D
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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 LPoint3 &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 LPoint3 *first, const LPoint3 *last); 00045 00046 INLINE_MATHUTIL int contains(const GeometricBoundingVolume *vol) const; 00047 INLINE_MATHUTIL int contains(const LPoint3 &point) const; 00048 INLINE_MATHUTIL int contains(const LPoint3 &a, const LPoint3 &b) const; 00049 00050 virtual LPoint3 get_approx_center() const=0; 00051 virtual void xform(const LMatrix4 &mat)=0; 00052 00053 public: 00054 virtual const GeometricBoundingVolume *as_geometric_bounding_volume() const; 00055 00056 protected: 00057 // Some virtual functions to implement fundamental bounding 00058 // operations on points in 3-d space. 00059 00060 virtual bool extend_by_point(const LPoint3 &point); 00061 virtual bool around_points(const LPoint3 *first, 00062 const LPoint3 *last); 00063 virtual int contains_point(const LPoint3 &point) const; 00064 virtual int contains_lineseg(const LPoint3 &a, const LPoint3 &b) const; 00065 00066 00067 public: 00068 static TypeHandle get_class_type() { 00069 return _type_handle; 00070 } 00071 static void init_type() { 00072 BoundingVolume::init_type(); 00073 register_type(_type_handle, "GeometricBoundingVolume", 00074 BoundingVolume::get_class_type()); 00075 } 00076 virtual TypeHandle get_type() const { 00077 return get_class_type(); 00078 } 00079 virtual TypeHandle force_init_type() {init_type(); return get_class_type();} 00080 00081 private: 00082 static TypeHandle _type_handle; 00083 }; 00084 00085 #include "geometricBoundingVolume.I" 00086 00087 #endif