OpenWalnut 1.2.5
WGEShaderAnimationCallback.h
00001 //---------------------------------------------------------------------------
00002 //
00003 // Project: OpenWalnut ( http://www.openwalnut.org )
00004 //
00005 // Copyright 2009 OpenWalnut Community, BSV@Uni-Leipzig and CNCF@MPI-CBS
00006 // For more information see http://www.openwalnut.org/copying
00007 //
00008 // This file is part of OpenWalnut.
00009 //
00010 // OpenWalnut is free software: you can redistribute it and/or modify
00011 // it under the terms of the GNU Lesser General Public License as published by
00012 // the Free Software Foundation, either version 3 of the License, or
00013 // (at your option) any later version.
00014 //
00015 // OpenWalnut is distributed in the hope that it will be useful,
00016 // but WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00018 // GNU Lesser General Public License for more details.
00019 //
00020 // You should have received a copy of the GNU Lesser General Public License
00021 // along with OpenWalnut. If not, see <http://www.gnu.org/licenses/>.
00022 //
00023 //---------------------------------------------------------------------------
00024 
00025 #ifndef WGESHADERANIMATIONCALLBACK_H
00026 #define WGESHADERANIMATIONCALLBACK_H
00027 
00028 #include "stdint.h"
00029 
00030 #include "boost/date_time/posix_time/posix_time.hpp"
00031 
00032 #include <osg/Uniform>
00033 
00034 #include "../WExportWGE.h"
00035 
00036 /**
00037  * This is a uniform callback setting the uniform to the current time in milliseconds, hundredth of a second or tenth of a second.
00038  */
00039 class WGE_EXPORT WGEShaderAnimationCallback: public osg::Uniform::Callback
00040 {
00041 public:
00042 
00043     /**
00044      * Default constructor. Creates a new instance and sets the precision
00045      *
00046      * \param ticksPerSecond the uniform will increase by 1 every hundredth second if =100, every 10th second if =10 and every second if =1.
00047      */
00048     explicit WGEShaderAnimationCallback( int ticksPerSecond = 100 );
00049 
00050     /**
00051      * Destructor.
00052      */
00053     virtual ~WGEShaderAnimationCallback();
00054 
00055     /**
00056      * Operator called on uniform update.
00057      *
00058      * \param uniform the uniform to update
00059      * \param nv the visitor.
00060      */
00061     virtual void operator() ( osg::Uniform* uniform, osg::NodeVisitor* nv );
00062 
00063 protected:
00064 
00065     /**
00066      * Timer that stops the time hopefully OS independent
00067      */
00068     boost::posix_time::ptime m_start;
00069 
00070     /**
00071      * Number of ticks to count per second.
00072      */
00073     int m_ticksPerSec;
00074 
00075     /**
00076      * Ratio between milliseconds and m_ticksPerSec
00077      */
00078     double m_tickMillisecRatio;
00079 
00080 private:
00081 };
00082 
00083 #endif  // WGESHADERANIMATIONCALLBACK_H
00084 
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