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