/**************************************************************************\
 *
 *  This file is part of the Coin 3D visualization library.
 *  Copyright (C) 1998-2002 by Systems in Motion. All rights reserved.
 *
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public License
 *  version 2.1 as published by the Free Software Foundation. See the
 *  file LICENSE.LGPL at the root directory of the distribution for
 *  more details.
 *
 *  If you want to use Coin for applications not compatible with the
 *  LGPL, please contact SIM to acquire a Professional Edition license.
 *
 *  Systems in Motion, Prof Brochs gate 6, 7030 Trondheim, NORWAY
 *  http://www.sim.no support@sim.no Voice: +47 22114160 Fax: +47 22207097
 *
\**************************************************************************/

#ifndef COIN_SOPENDULUM_H
#define COIN_SOPENDULUM_H

#include <Inventor/nodes/SoSubNode.h>
#include <Inventor/nodes/SoRotation.h>
#include <Inventor/fields/SoSFRotation.h>
#include <Inventor/fields/SoSFFloat.h>
#include <Inventor/fields/SoSFBool.h>

class SoElapsedTime;
class SoCalculator;
class SoInterpolateRotation;

class COIN_DLL_API SoPendulum : public SoRotation {
  typedef SoRotation inherited;

  SO_NODE_HEADER(SoPendulum);

public:
  static void initClass(void);
  SoPendulum(void);

  SoSFRotation rotation0;
  SoSFRotation rotation1;
  SoSFFloat speed;
  SoSFBool on;

  virtual void write(SoWriteAction * action);

protected:
  virtual ~SoPendulum();

private:
  virtual SoNode * copy(SbBool copyconnections = FALSE) const;
  void deconnectInternalEngine(void);
  void reconnectInternalEngine(void);

  SoInterpolateRotation * interpolator;
  SoCalculator * calculator;
  SoElapsedTime * timer;
};

#endif // !COIN_SOPENDULUM_H
