Initial Prey Game integration support.

neo/prey/Prey/force_converge.h

@@ -0,0 +1,44 @@
+#ifndef __FORCE_CONVERGE_H__
+#define __FORCE_CONVERGE_H__
+
+//===============================================================================
+//
+//	Convergent force
+//
+//===============================================================================
+
+class hhForce_Converge : public idForce {
+	CLASS_PROTOTYPE( hhForce_Converge );
+
+public:
+						hhForce_Converge( void );
+	virtual				~hhForce_Converge( void );
+	void				Save( idSaveGame *savefile ) const;
+	void				Restore( idRestoreGame *savefile );
+	void				SetTarget(idVec3 &newTarget);
+	void				SetEntity(idEntity *entity, int id=0, const idVec3 &point=vec3_origin);
+	idEntity *			GetEntity() const				{ return ent.GetEntity();				}
+	void				SetRestoreTime( float time );
+	void				SetRestoreFactor( float factor ){ restoreFactor = factor;	}
+	void				SetRestoreSlack(float slack) { restoreForceSlack = slack; }
+
+public: // common force interface
+	virtual void		Evaluate( int time );
+	virtual void		RemovePhysics( const idPhysics *phys );
+	void				SetAxisEntity(idEntity *entity);
+	void			    SetShuttle(bool shuttle) { bShuttle = shuttle; } 
+
+private:
+	idEntityPtr<idEntity>	ent;			// Entity to apply forces to
+	idEntityPtr<idEntity>   axisEnt;
+	idPhysics *			physics;			// physics object of entity during last evaluate
+	idVec3				target;				// Point of convergence
+	idVec3				offset;				// Entity local offset for force application
+	int					bodyID;				// Body ID for force application
+	float				restoreTime;		// Ideal convergence time
+	float				restoreFactor;		// Spring constant for restorative force
+	float				restoreForceSlack;	//rww - allow a linear buildup based on the distance of the target point
+	bool				bShuttle;			//mdl:  Use an alternate spring equation for shuttle tractor beam
+};
+
+#endif