VRS - The Virtual Rendering System

version 3.3

framecounter.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: framecounter.h 6332 2008-05-09 13:29:10Z Silvio_Moelter $
// $Date: 2008-05-09 15:29:10 +0200 (Fri, 09 May 2008) $
// $Revision: 6332 $
// $State$
// $Author: Silvio_Moelter $
//
// $Log$
// Revision 1.15  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 1.14  2004/10/28 14:16:01  basch
// Class comment changed (Doxygen style)
//
// Revision 1.13  2004/03/12 16:28:41  baumann
// macros VRS_NAMESPACE_BEGIN/_END expanded and removed
//
// Revision 1.12  2004/02/16 16:42:08  baumann
// - moved class VRS::SceneNode from "vrs/sg/" to "vrs/"
// - renamed class VRS::SceneGraphVisitor to class VRS::SceneNodeVisitor
//     and moved it from "vrs/sg/" to "vrs/"
//
// Revision 1.11  2004/01/19 11:43:58  baumann
// serialization mechanism improved
//
// Revision 1.10  2003/11/07 14:19:25  kirsch
// removed leading underscore from include guards
//
// Revision 1.9  2002/10/29 10:32:53  baumann
// macros VRS_CLASSNAME_* and VRS_IMPL_TYPEINFO_* removed
//
// Revision 1.8  2002/04/25 19:23:03  rozinat
// persistency added: VRS_SERIALIZABLE-macro added
//
// Revision 1.7  2002/03/03 21:44:26  kosta
// VRS_TYPEINFO-macro rewritten
//
// Revision 1.6  2002/02/19 10:34:20  kosta
// undone all changes since 2002-02-15
//
// 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  2001/09/07 11:44:01  kersting
// initial version
//

#ifndef VRS_FRAMECOUNTER_H
#define VRS_FRAMECOUNTER_H

#include <vrs/scenenode.h>
#include <vrs/sg/clock.h>

namespace VRS {

class VRS_CORE_API FrameCounter : public SceneNode {

public:
    
    FrameCounter(bool onlyFrames = true);
    virtual void evaluate(Engine* engine);

    double framerate();
        //. returns the number of frames per second since last call

    double currentFramerate(int numAvgValues = 20);
        //. returns the current number of fps, averaged through the last 'numAvgValues' frames

    VRS_TYPEINFO(FrameCounter, SceneNode);
        VRS_SERIALIZABLE(FrameCounter);

private:
        bool onlyFrames_;    
    int counter_;

    double ringBuffer_[100];
    int rbIndex_;
};

} // namespace VRS

#endif // VRS_FRAMECOUNTER_H

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