Panda3D
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00001 // Filename: linearDistanceForce.h 00002 // Created by: charles (21Jun00) 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 LINEARDISTANCEFORCE_H 00016 #define LINEARDISTANCEFORCE_H 00017 00018 #include "linearForce.h" 00019 00020 class BamReader; 00021 00022 //////////////////////////////////////////////////////////////////// 00023 // Class : LinearDistanceForce 00024 // Description : Pure virtual class for sinks and sources 00025 //////////////////////////////////////////////////////////////////// 00026 class EXPCL_PANDAPHYSICS LinearDistanceForce : public LinearForce { 00027 PUBLISHED: 00028 enum FalloffType { 00029 FT_ONE_OVER_R, 00030 FT_ONE_OVER_R_SQUARED, 00031 FT_ONE_OVER_R_CUBED 00032 }; 00033 00034 INLINE void set_radius(PN_stdfloat r); 00035 INLINE void set_falloff_type(FalloffType ft); 00036 INLINE void set_force_center(const LPoint3& p); 00037 00038 INLINE PN_stdfloat get_radius() const; 00039 INLINE FalloffType get_falloff_type() const; 00040 INLINE LPoint3 get_force_center() const; 00041 00042 INLINE PN_stdfloat get_scalar_term() const; 00043 00044 virtual void output(ostream &out) const; 00045 virtual void write(ostream &out, unsigned int indent=0) const; 00046 00047 private: 00048 LPoint3 _force_center; 00049 00050 FalloffType _falloff; 00051 PN_stdfloat _radius; 00052 00053 virtual LinearForce *make_copy() = 0; 00054 virtual LVector3 get_child_vector(const PhysicsObject *po) = 0; 00055 00056 protected: 00057 LinearDistanceForce(const LPoint3& p, FalloffType ft, PN_stdfloat r, PN_stdfloat a, 00058 bool m); 00059 LinearDistanceForce(const LinearDistanceForce ©); 00060 virtual ~LinearDistanceForce(); 00061 00062 public: 00063 static TypeHandle get_class_type() { 00064 return _type_handle; 00065 } 00066 static void init_type() { 00067 LinearForce::init_type(); 00068 register_type(_type_handle, "LinearDistanceForce", 00069 LinearForce::get_class_type()); 00070 } 00071 virtual TypeHandle get_type() const { 00072 return get_class_type(); 00073 } 00074 virtual TypeHandle force_init_type() {init_type(); return get_class_type();} 00075 00076 private: 00077 static TypeHandle _type_handle; 00078 }; 00079 00080 #include "linearDistanceForce.I" 00081 00082 #endif // LINEARDISTANCEFORCE_H