// model.hxx - manage a 3D aircraft model. // Written by David Megginson, started 2002. // // This file is in the Public Domain, and comes with no warranty. #ifndef __MODEL_HXX #define __MODEL_HXX 1 #ifndef __cplusplus # error This library requires C++ #endif #include #include SG_USING_STD(string); SG_USING_STD(vector); #include "fgfs.hxx" #include #include // Has anyone done anything *really* stupid, like making min and max macros? #ifdef min #undef min #endif #ifdef max #undef max #endif class FGAircraftModel : public FGSubsystem { public: FGAircraftModel (); virtual ~FGAircraftModel (); virtual void init (); virtual void bind (); virtual void unbind (); virtual void update (int dt); private: class Animation; Animation * make_animation (const char * object_name, SGPropertyNode * node); ssgEntity * _model; ssgSelector * _selector; ssgTransform * _position; vector _animations; ////////////////////////////////////////////////////////////////////// // Internal classes for individual animations. ////////////////////////////////////////////////////////////////////// /** * Abstract base class for all animations. */ class Animation { public: Animation (); virtual ~Animation (); /** * Initialize the animation. * * @param object The object to animate. * @param props The property node with configuration information. */ virtual void init (ssgEntity * object, SGPropertyNode * props) = 0; /** * Update the animation. * * @param dt The elapsed time in milliseconds since the last call. */ virtual void update (int dt) = 0; }; /** * A no-op animation. */ class NullAnimation : public Animation { public: NullAnimation (); virtual ~NullAnimation (); virtual void init (ssgEntity * object, SGPropertyNode * props); virtual void update (int dt); }; /** * Animation to spin an object around a center point. * * This animation rotates at a specific velocity. */ class SpinAnimation : public Animation { public: SpinAnimation (); virtual ~SpinAnimation (); virtual void init (ssgEntity * object, SGPropertyNode * props); virtual void update (int dt); private: SGPropertyNode * _prop; double _factor; double _position_deg; sgMat4 _matrix; sgVec3 _center; sgVec3 _axis; ssgTransform * _transform; }; /** * Animation to rotate an object around a center point. * * This animation rotates to a specific position. */ class RotateAnimation : public Animation { public: RotateAnimation (); virtual ~RotateAnimation (); virtual void init (ssgEntity * object, SGPropertyNode * props); virtual void update (int dt); private: SGPropertyNode * _prop; double _offset_deg; double _factor; bool _has_min; double _min_deg; bool _has_max; double _max_deg; double _position_deg; sgMat4 _matrix; sgVec3 _center; sgVec3 _axis; ssgTransform * _transform; }; /** * Animation to slide along an axis. */ class TranslateAnimation : public Animation { public: TranslateAnimation (); virtual ~TranslateAnimation (); virtual void init (ssgEntity * object, SGPropertyNode * props); virtual void update (int dt); private: SGPropertyNode * _prop; double _offset_m; double _factor; bool _has_min; double _min_m; bool _has_max; double _max_m; double _position_m; sgMat4 _matrix; sgVec3 _axis; ssgTransform * _transform; }; }; extern FGAircraftModel current_model; #endif // __MODEL_HXX