Panda3D
geometricBoundingVolume.h
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1 /**
2  * PANDA 3D SOFTWARE
3  * Copyright (c) Carnegie Mellon University. All rights reserved.
4  *
5  * All use of this software is subject to the terms of the revised BSD
6  * license. You should have received a copy of this license along
7  * with this source code in a file named "LICENSE."
8  *
9  * @file geometricBoundingVolume.h
10  * @author drose
11  * @date 1999-10-07
12  */
13 
14 #ifndef GEOMETRICBOUNDINGVOLUME_H
15 #define GEOMETRICBOUNDINGVOLUME_H
16 
17 #include "pandabase.h"
18 
19 #include "boundingVolume.h"
20 
21 #include "luse.h"
22 #include "lmatrix.h"
23 
24 /**
25  * This is another abstract class, for a general class of bounding volumes
26  * that actually enclose points in 3-d space, such as BSP's and bounding
27  * spheres.
28  */
29 class EXPCL_PANDA_MATHUTIL GeometricBoundingVolume : public BoundingVolume {
30 public:
31  INLINE_MATHUTIL GeometricBoundingVolume();
32 
33 PUBLISHED:
34  INLINE_MATHUTIL bool extend_by(const GeometricBoundingVolume *vol);
35  INLINE_MATHUTIL bool extend_by(const LPoint3 &point);
36 
37 public:
38  // It might be nice to make these template member functions so we could have
39  // true STL-style firstlast iterators, but that's impossible for virtual
40  // functions.
41  INLINE_MATHUTIL bool around(const GeometricBoundingVolume **first,
42  const GeometricBoundingVolume **last);
43  INLINE_MATHUTIL bool around(const LPoint3 *first, const LPoint3 *last);
44 
45 PUBLISHED:
46  INLINE_MATHUTIL int contains(const GeometricBoundingVolume *vol) const;
47  INLINE_MATHUTIL int contains(const LPoint3 &point) const;
48  INLINE_MATHUTIL int contains(const LPoint3 &a, const LPoint3 &b) const;
49 
50  virtual LPoint3 get_approx_center() const=0;
51  virtual void xform(const LMatrix4 &mat)=0;
52 
53 public:
55  virtual const GeometricBoundingVolume *as_geometric_bounding_volume() const final;
56 
57 protected:
58  // Some virtual functions to implement fundamental bounding operations on
59  // points in 3-d space.
60 
61  virtual bool extend_by_point(const LPoint3 &point);
62  virtual bool around_points(const LPoint3 *first,
63  const LPoint3 *last);
64  virtual int contains_point(const LPoint3 &point) const;
65  virtual int contains_lineseg(const LPoint3 &a, const LPoint3 &b) const;
66 
67 
68 public:
69  static TypeHandle get_class_type() {
70  return _type_handle;
71  }
72  static void init_type() {
73  BoundingVolume::init_type();
74  register_type(_type_handle, "GeometricBoundingVolume",
75  BoundingVolume::get_class_type());
76  }
77  virtual TypeHandle get_type() const {
78  return get_class_type();
79  }
80  virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
81 
82 private:
83  static TypeHandle _type_handle;
84 };
85 
86 // We can safely redefine this as a no-op.
87 template<>
89 
91 
92 #endif
BoundingVolume::as_geometric_bounding_volume
virtual GeometricBoundingVolume * as_geometric_bounding_volume()
Virtual downcast method.
Definition: boundingVolume.cxx:90
pandabase.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
register_type
void register_type(TypeHandle &type_handle, const std::string &name)
This inline function is just a convenient way to call TypeRegistry::register_type(),...
Definition: register_type.I:22
BoundingVolume::around
bool around(const BoundingVolume **first, const BoundingVolume **last)
Resets the volume to enclose only the volumes indicated.
Definition: boundingVolume.cxx:40
lmatrix.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
TypeHandle
TypeHandle is the identifier used to differentiate C++ class types.
Definition: typeHandle.h:81
PointerToBase
This is the base class for PointerTo and ConstPointerTo.
Definition: pointerToBase.h:29
luse.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
GeometricBoundingVolume
This is another abstract class, for a general class of bounding volumes that actually enclose points ...
Definition: geometricBoundingVolume.h:29
BoundingVolume::contains
int contains(const BoundingVolume *vol) const
Returns the appropriate set of IntersectionFlags to indicate the amount of intersection with the indi...
Definition: boundingVolume.I:80
geometricBoundingVolume.I
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
BoundingVolume::extend_by
bool extend_by(const BoundingVolume *vol)
Increases the size of the volume to include the given volume.
Definition: boundingVolume.I:61
BoundingVolume
This is an abstract class for any volume in any sense which can be said to define the locality of ref...
Definition: boundingVolume.h:41
boundingVolume.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.