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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
33PUBLISHED:
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
45PUBLISHED:
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:
54 virtual GeometricBoundingVolume *as_geometric_bounding_volume() final;
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<>
88INLINE void PointerToBase<GeometricBoundingVolume>::update_type(To *ptr) {}
89
90#include "geometricBoundingVolume.I"
91
92#endif
boundingVolume.h
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::as_geometric_bounding_volume
virtual GeometricBoundingVolume * as_geometric_bounding_volume()
Virtual downcast method.
Definition boundingVolume.cxx:90
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
BoundingVolume::around
bool around(const BoundingVolume **first, const BoundingVolume **last)
Resets the volume to enclose only the volumes indicated.
Definition boundingVolume.cxx:40
To
TypeHandle
TypeHandle is the identifier used to differentiate C++ class types.
Definition typeHandle.h:81
geometricBoundingVolume.I
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
lmatrix.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
luse.h
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
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