FGExternalForce.h

/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 Header:       FGExternalForce.h
 Author:       Jon Berndt, Dave Culp
 Date started: 9/21/07
 
 ------------- Copyright (C) 2007  Jon S. Berndt (jon@jsbsim.org) -------------
 
 This program is free software; you can redistribute it and/or modify it under
 the terms of the GNU Lesser General Public License as published by the Free
 Software Foundation; either version 2 of the License, or (at your option) any
 later version.
 
 This program is distributed in the hope that it will be useful, but WITHOUT
 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License for more
 details.
 
 You should have received a copy of the GNU Lesser General Public License along
 with this program; if not, write to the Free Software Foundation, Inc., 59
 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 
 Further information about the GNU Lesser General Public License can also be
 found on the world wide web at http://www.gnu.org.
 
 
 HISTORY
--------------------------------------------------------------------------------
9/21/07  JB   Created
 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
SENTRY
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
#ifndef FGEXTERNALFORCE_H
#define FGEXTERNALFORCE_H
 
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
INCLUDES
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
#include "models/propulsion/FGForce.h"
#include "simgear/props/propertyObject.hxx"
 
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
FORWARD DECLARATIONS
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
namespace JSBSim {
 
class FGParameter;
class Element;
class FGPropertyManager;
 
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS DECLARATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
class FGPropertyVector3
{
public:
  FGPropertyVector3(void) {}
  FGPropertyVector3(FGPropertyManager* pm, const std::string& baseName,
                    const std::string& xcmp, const std::string& ycmp,
                    const std::string& zcmp);
 
  FGPropertyVector3& operator=(const FGColumnVector3& v) {
    data[0] = v(1);
    data[1] = v(2);
    data[2] = v(3);
 
    return *this;
  }
 
  operator FGColumnVector3() const {
    return FGColumnVector3(data[0], data[1], data[2]);
  }
 
  FGColumnVector3 operator*(double a) const {
    return FGColumnVector3(a * data[0], a * data[1], a * data[2]);
  }
 
private:
  SGPropObjDouble data[3];
};
 
inline FGColumnVector3 operator*(double a, const FGPropertyVector3& v) {
  return v*a;
}
 
/*%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
CLASS DOCUMENTATION
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%*/
 
class FGExternalForce : public FGForce
{
public:
  explicit FGExternalForce(FGFDMExec *FDMExec)
    : FGForce(FDMExec), forceMagnitude(NULL), momentMagnitude(NULL)
  { Debug(0); }
 
  FGExternalForce(const FGExternalForce& extForce);
 
  ~FGExternalForce() override;
 
  void setForce(Element* el);
  void setMoment(Element* el);
  const FGColumnVector3& GetBodyForces(void) override;
 
private:
  FGParameter* bind(Element* el, const std::string& baseName,
                    FGPropertyVector3& v);
 
  std::string Name;
  FGParameter *forceMagnitude, *momentMagnitude;
  FGPropertyVector3 forceDirection, momentDirection;
  void Debug(int from);
};
}
#endif