Panda3D
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00001 // Filename: linearFrictionForce.h 00002 // Created by: charles (23Jun00) 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 LINEARFRICTIONFORCE_H 00016 #define LINEARFRICTIONFORCE_H 00017 00018 #include "linearForce.h" 00019 00020 //////////////////////////////////////////////////////////////////// 00021 // Class : LinearFrictionForce 00022 // Description : Friction-based drag force 00023 //////////////////////////////////////////////////////////////////// 00024 class EXPCL_PANDAPHYSICS LinearFrictionForce : public LinearForce { 00025 PUBLISHED: 00026 LinearFrictionForce(PN_stdfloat coef = 1.0f, PN_stdfloat a = 1.0f, bool m = false); 00027 LinearFrictionForce(const LinearFrictionForce ©); 00028 virtual ~LinearFrictionForce(); 00029 00030 INLINE void set_coef(PN_stdfloat coef); 00031 INLINE PN_stdfloat get_coef() const; 00032 00033 virtual void output(ostream &out) const; 00034 virtual void write(ostream &out, unsigned int indent=0) const; 00035 00036 private: 00037 PN_stdfloat _coef; 00038 00039 virtual LinearForce *make_copy(); 00040 virtual LVector3 get_child_vector(const PhysicsObject *); 00041 00042 public: 00043 static TypeHandle get_class_type() { 00044 return _type_handle; 00045 } 00046 static void init_type() { 00047 LinearForce::init_type(); 00048 register_type(_type_handle, "LinearFrictionForce", 00049 LinearForce::get_class_type()); 00050 } 00051 virtual TypeHandle get_type() const { 00052 return get_class_type(); 00053 } 00054 virtual TypeHandle force_init_type() {init_type(); return get_class_type();} 00055 00056 private: 00057 static TypeHandle _type_handle; 00058 }; 00059 00060 #include "linearFrictionForce.I" 00061 00062 #endif // LINEARFRICTIONFORCE_H