Function ObjectSpeed

engine/Poseidon/World/Scene/Object.hpp:312–312

	virtual void SetPlateNumber( RString plate );

	virtual Vector3Val ObjectSpeed() const {return VZero;}
	virtual bool Airborne() const {return false;}
	// Check if object may be locked by given weapon
	virtual bool LockPossible( const AmmoType *ammo ) const {return false;}