VRS - The Virtual Rendering System

version 3.3

moment.h

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 /**********************************************************************
 VRS - The Virtual Rendering System
 Copyright (C) 2001 Computer Graphics Systems Group at the 
 Hasso-Plattner-Institute, Potsdam, Germany.
 This library 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 2.1 of the License, or (at your option) any later version.
 This library 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 library; if not, write to the FreeSoftware 
 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA, 02111-1307, USA.
 **********************************************************************/
// $Id: moment.h 6014 2007-08-09 07:51:16Z Konstantin_Baumann $
// $Date: 2007-08-09 09:51:16 +0200 (Thu, 09 Aug 2007) $
// $Revision: 6014 $
// $State$
// $Author: Konstantin_Baumann $
//
// $Log$
// Revision 1.20  2005/01/03 01:43:10  klimetschek
// - modified win32 project layout, splitted vrs.vcproj into vrs_container, vrs_core, vrs_sg, vrs_image, vrs_opengl and vrs_io
// - removed vrs.vcproj
// minor things:
// - added all glutexamples to vrs4glut.sln
// - fixed some problems in glutexamples
// - removed all project references from all VS projects (using solution wide project dependencies instead)
//
// Revision 1.19  2004/10/28 14:16:01  basch
// Class comment changed (Doxygen style)
//
// Revision 1.18  2004/03/12 16:28:41  baumann
// macros VRS_NAMESPACE_BEGIN/_END expanded and removed
//
// Revision 1.17  2004/01/19 11:43:59  baumann
// serialization mechanism improved
//
// Revision 1.16  2003/11/07 14:19:25  kirsch
// removed leading underscore from include guards
//
// Revision 1.15  2003/10/21 11:41:13  baumann
// moved class VRSTime from "vrs/sg" to "vrs"
//
// Revision 1.14  2003/06/30 07:43:59  kirsch
// iostream changes
//
// Revision 1.13  2003/06/17 07:20:10  nienhaus
// merged setBegin and setEnd to setInterval for a better range check
//
// Revision 1.12  2003/06/16 06:44:25  nienhaus
// set-methodes to modify begin and end
//
// Revision 1.11  2002/10/29 10:32:53  baumann
// macros VRS_CLASSNAME_* and VRS_IMPL_TYPEINFO_* removed
//
// Revision 1.10  2002/03/19 08:02:26  baumann
// Moment::time() renamed to Moment::current()
//
// Revision 1.9  2002/02/27 15:03:29  kersting
// renamed Time to VRSTime
//
// Revision 1.8  2002/02/19 10:34:20  kosta
// undone all changes since 2002-02-15
//
// Revision 1.6  2002/02/13 16:28:11  kosta
// implementation of the serialize()-method moved outside the class declaration
//
// Revision 1.5  2002/02/05 07:48:26  kosta
// new persistency macros:
//     VRS_SERIALIZABLE(CLASS_NAME);
//     VRS_SERIALIZABLE_ABSTRACT_CLASS(CLASS_NAME);
//     VRS_SERIALIZABLE_NO_SO_CLASS(CLASS_NAME)
//
// Revision 1.4  2002/02/04 11:54:37  kosta
// persistency rewritten (for better namespace support)
//
// Revision 1.3  2002/01/15 16:25:55  kosta
// macros rewritten for a better namespace support
//
// Revision 1.2  2001/11/13 16:36:31  kirsch
// changed line feed to unix style (removed control-M)
//
// Revision 1.1.1.1  2001/06/08 08:09:21  kirsch
// imported alpha-version by olli 
//


#ifndef VRS_MOMENT_H
#define VRS_MOMENT_H

#include <vrs/time.h>

namespace VRS {

class VRS_CORE_API Moment {

public:
    Moment();
    Moment(const VRSTime& begin, const VRSTime& end, const VRSTime& current);

    bool operator==(const Moment&) const;
    bool operator!=(const Moment&) const;

    VRSTime begin() const;
    VRSTime current() const;
    VRSTime end() const;
    VRSTime duration() const;
    double relative() const;

    void setInterval(const VRSTime& begin, const VRSTime& end);
    void setCurrent(const VRSTime& current);

    // implement persistency
    VRS_SERIALIZABLE_NO_SO_CLASS(Moment);

private:
    VRSTime time_;
    VRSTime begin_;
    VRSTime end_;
};

inline VRSTime Moment::begin() const { return begin_; }
inline VRSTime Moment::end() const { return end_; }
inline VRSTime Moment::current() const { return time_; }
inline VRSTime Moment::duration() const { return end_ - begin_; }
inline double  Moment::relative() const { return (time_-begin_)/(end_-begin_); }

inline void Moment::setInterval(const VRSTime& begin, const VRSTime& end) { 
    VRS_Assertion(0<=begin && begin<=end, "bad moment: " << begin << " / " << end);
    begin_ = begin; 
    end_ = end;
}

inline void Moment::setCurrent(const VRSTime& current) { time_ = current; }

extern VRS_CORE_API std::ostream& operator<<(std::ostream&, const Moment&);
extern VRS_CORE_API std::istream& operator>>(std::istream&, Moment&);

} // namespace VRS

#endif // VRS_MOMENT_H

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