base/TrajectoryTimeRep

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/****************************************************************************
  Copyright (C)2002 David Jung <opensim@pobox.com>

  This program/file is free software; you can redistribute it and/or modify
  it under the terms of the GNU 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 General Public License for more details. (http://www.gnu.org)
  
  You should have received a copy of the GNU 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
  
  $Id: TrajectoryTimeRep 1029 2004-02-11 20:45:54Z jungd $
  $Revision: 1.1 $
  $Date: 2004-02-11 15:45:54 -0500 (Wed, 11 Feb 2004) $
  $Author: jungd $
 
****************************************************************************/

#ifndef _BASE_TRAJECTORYTIMEREP_
#define _BASE_TRAJECTORYTIMEREP_

#include <base/base>

#include <base/ReferencedObject>
#include <base/Serializable>
#include <base/Cloneable>

#include <base/Time>


namespace base {


/**
 *  Abstract interface for concrete trajectory time representations used by class Trajectory.
 *  (users should use class Trajectory directly; implementors of new representations
 *   should implement this interface and add appropriate support in Trajectory)
 */
class TrajectoryTimeRep : public ReferencedObject, virtual public Serializable, virtual public Cloneable
{
public:

  /// get time at s:[0..1]
  virtual Time time(Real s) const = 0;

  /// shift time by dt
  virtual void shiftTime(const Time& dt) = 0;

  /// scale time by s
  virtual void scaleTime(Real s) = 0;

  /// get parameter s value at time t
  virtual Real gets(const Time& t) const = 0;
  
};


} // base

#endif

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