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linearForce.h
00001 // Filename: linearForce.h
00002 // Created by:  charles (13Jun00)
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 LINEARFORCE_H
00016 #define LINEARFORCE_H
00017 
00018 #include "baseForce.h"
00019 
00020 ////////////////////////////////////////////////////////////////////
00021 //       Class : LinearForce
00022 // Description : A force that acts on a PhysicsObject by way of an
00023 //               Integrator.  This is a pure virtual base class.
00024 ////////////////////////////////////////////////////////////////////
00025 class EXPCL_PANDAPHYSICS LinearForce : public BaseForce {
00026 PUBLISHED:
00027   ~LinearForce();
00028 
00029   INLINE void set_amplitude(const PN_stdfloat a);
00030   INLINE void set_mass_dependent(bool m);
00031 
00032   INLINE PN_stdfloat get_amplitude() const;
00033   INLINE bool get_mass_dependent() const;
00034 
00035   INLINE void set_vector_masks(bool x, bool y, bool z);
00036   INLINE LVector3 get_vector_masks();
00037 
00038   LVector3 get_vector(const PhysicsObject *po);
00039 
00040   virtual LinearForce *make_copy() = 0;
00041 
00042   virtual bool is_linear() const;
00043   
00044   virtual void output(ostream &out) const;
00045   virtual void write(ostream &out, unsigned int indent=0) const;
00046 
00047 protected:
00048   LinearForce(PN_stdfloat a, bool mass);
00049   LinearForce(const LinearForce& copy);
00050 
00051 private:
00052   PN_stdfloat _amplitude;
00053   bool _mass_dependent;
00054 
00055   bool _x_mask;
00056   bool _y_mask;
00057   bool _z_mask;
00058 
00059   virtual LVector3 get_child_vector(const PhysicsObject *po) = 0;
00060 
00061 public:
00062   static TypeHandle get_class_type() {
00063     return _type_handle;
00064   }
00065   static void init_type() {
00066     BaseForce::init_type();
00067     register_type(_type_handle, "LinearForce",
00068                   BaseForce::get_class_type());
00069   }
00070   virtual TypeHandle get_type() const {
00071     return get_class_type();
00072   }
00073   virtual TypeHandle force_init_type() {init_type(); return get_class_type();}
00074 
00075 private:
00076   static TypeHandle _type_handle;
00077 };
00078 
00079 #include "linearForce.I"
00080 
00081 #endif // BASELINEARFORCE_H
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