Panda3D
linearFrictionForce.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 linearFrictionForce.h
10  * @author charles
11  * @date 2000-06-23
12  */
13 
14 #ifndef LINEARFRICTIONFORCE_H
15 #define LINEARFRICTIONFORCE_H
16 
17 #include "linearForce.h"
18 
19 /**
20  * Friction-based drag force
21  */
22 class EXPCL_PANDA_PHYSICS LinearFrictionForce : public LinearForce {
23 PUBLISHED:
24  explicit LinearFrictionForce(PN_stdfloat coef = 1.0f, PN_stdfloat a = 1.0f, bool m = false);
26  virtual ~LinearFrictionForce();
27 
28  INLINE void set_coef(PN_stdfloat coef);
29  INLINE PN_stdfloat get_coef() const;
30 
31  virtual void output(std::ostream &out) const;
32  virtual void write(std::ostream &out, int indent=0) const;
33 
34 private:
35  PN_stdfloat _coef;
36 
37  virtual LinearForce *make_copy();
38  virtual LVector3 get_child_vector(const PhysicsObject *);
39 
40 public:
41  static TypeHandle get_class_type() {
42  return _type_handle;
43  }
44  static void init_type() {
45  LinearForce::init_type();
46  register_type(_type_handle, "LinearFrictionForce",
47  LinearForce::get_class_type());
48  }
49  virtual TypeHandle get_type() const {
50  return get_class_type();
51  }
52  virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
53 
54 private:
55  static TypeHandle _type_handle;
56 };
57 
58 #include "linearFrictionForce.I"
59 
60 #endif // LINEARFRICTIONFORCE_H
Friction-based drag force.
A body on which physics will be applied.
Definition: physicsObject.h:27
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
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
A force that acts on a PhysicsObject by way of an Integrator.
Definition: linearForce.h:23
std::ostream & indent(std::ostream &out, int indent_level)
A handy function for doing text formatting.
Definition: indent.cxx:20
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
virtual void write(std::ostream &out, int indent=0) const
Write a string representation of this instance to <out>.
Definition: linearForce.cxx:95
virtual void output(std::ostream &out) const
Write a string representation of this instance to <out>.
Definition: linearForce.cxx:85
TypeHandle is the identifier used to differentiate C++ class types.
Definition: typeHandle.h:81