Panda3D
collisionHandlerGravity.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 collisionHandlerGravity.h
10  * @author drose
11  * @date 2002-03-16
12  */
13 
14 #ifndef CollisionHandlerGravity_H
15 #define CollisionHandlerGravity_H
16 
17 #include "pandabase.h"
18 
20 
21 /**
22  * A specialized kind of CollisionHandler that sets the Z height of the
23  * collider to a fixed linear offset from the highest detected collision point
24  * each frame. It's intended to implement walking around on a floor of
25  * varying height by casting a ray down from the avatar's head.
26  */
27 class EXPCL_PANDA_COLLIDE CollisionHandlerGravity : public CollisionHandlerPhysical {
28 PUBLISHED:
30  virtual ~CollisionHandlerGravity();
31 
32  INLINE void set_offset(PN_stdfloat offset);
33  INLINE PN_stdfloat get_offset() const;
34 
35  INLINE void set_reach(PN_stdfloat reach);
36  INLINE PN_stdfloat get_reach() const;
37 
38  INLINE PN_stdfloat get_airborne_height() const;
39  INLINE bool is_on_ground() const;
40  INLINE PN_stdfloat get_impact_velocity() const;
41  INLINE const LVector3 &get_contact_normal() const;
42 
43  INLINE void add_velocity(PN_stdfloat velocity);
44  INLINE void set_velocity(PN_stdfloat velocity);
45  INLINE PN_stdfloat get_velocity() const;
46 
47  INLINE void set_gravity(PN_stdfloat gravity);
48  INLINE PN_stdfloat get_gravity() const;
49 
50  INLINE void set_max_velocity(PN_stdfloat max_vel);
51  INLINE PN_stdfloat get_max_velocity() const;
52 
53  INLINE void set_legacy_mode(bool legacy_mode);
54  INLINE bool get_legacy_mode() const;
55 
56 PUBLISHED:
57  MAKE_PROPERTY(offset, get_offset, set_offset);
58  MAKE_PROPERTY(reach, get_reach, set_reach);
59  MAKE_PROPERTY(airborne_height, get_airborne_height);
60  MAKE_PROPERTY(on_ground, is_on_ground);
61  MAKE_PROPERTY(impact_velocity, get_impact_velocity);
62  MAKE_PROPERTY(contact_normal, get_contact_normal);
63  MAKE_PROPERTY(velocity, get_velocity, set_velocity);
64  MAKE_PROPERTY(gravity, get_gravity, set_gravity);
65  MAKE_PROPERTY(max_velocity, get_max_velocity, set_max_velocity);
66 
67  void write_datagram(Datagram &destination) const;
68  void read_datagram(DatagramIterator &source);
69 
70 protected:
71  PN_stdfloat set_highest_collision(const NodePath &target_node_path, const NodePath &from_node_path, const Entries &entries);
72  virtual bool handle_entries();
73  virtual void apply_linear_force(ColliderDef &def, const LVector3 &force);
74 
75 private:
76  PN_stdfloat _offset;
77  PN_stdfloat _reach;
78  PN_stdfloat _airborne_height;
79  PN_stdfloat _impact_velocity;
80  PN_stdfloat _gravity;
81  PN_stdfloat _current_velocity;
82  PN_stdfloat _max_velocity;
83  LVector3 _contact_normal;
84  bool _legacy_mode;
85 
86 
87 public:
88  static TypeHandle get_class_type() {
89  return _type_handle;
90  }
91  static void init_type() {
92  CollisionHandlerPhysical::init_type();
93  register_type(_type_handle, "CollisionHandlerGravity",
94  CollisionHandlerPhysical::get_class_type());
95  }
96  virtual TypeHandle get_type() const {
97  return get_class_type();
98  }
99  virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
100 
101 private:
102  static TypeHandle _type_handle;
103 };
104 
105 #include "collisionHandlerGravity.I"
106 
107 #endif
void read_datagram(DatagramIterator &source)
Restores the object state from the given datagram, previously obtained using __getstate__.
void write_datagram(Datagram &destination) const
Serializes this object, to implement pickle support.
A specialized kind of CollisionHandler that sets the Z height of the collider to a fixed linear offse...
The abstract base class for a number of CollisionHandlers that have some physical effect on their mov...
A class to retrieve the individual data elements previously stored in a Datagram.
An ordered list of data elements, formatted in memory for transmission over a socket or writing to a ...
Definition: datagram.h:38
NodePath is the fundamental system for disambiguating instances, and also provides a higher-level int...
Definition: nodePath.h:159
TypeHandle is the identifier used to differentiate C++ class types.
Definition: typeHandle.h:81
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
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