159 lines
4.3 KiB
C++
159 lines
4.3 KiB
C++
#include <osgGA/AnimationPathManipulator>
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#include <stdio.h>
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using namespace osgGA;
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AnimationPathManipulator::AnimationPathManipulator(osg::AnimationPath* animationPath)
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{
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_animationPath = animationPath;
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_timeOffset = 0.0;
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_timeScale = 1.0;
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_isPaused = false;
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_realStartOfTimedPeriod = 0.0;
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_animStartOfTimedPeriod = 0.0;
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_numOfFramesSinceStartOfTimedPeriod = -1; // need to init.
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}
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AnimationPathManipulator::AnimationPathManipulator( const std::string& filename )
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{
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_animationPath = new osg::AnimationPath;
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_animationPath->setLoopMode(osg::AnimationPath::LOOP);
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_timeOffset = 0.0f;
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_timeScale = 1.0f;
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_isPaused = false;
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FILE *fp = fopen( filename.c_str(), "r" );
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if( fp == NULL )
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{
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osg::notify(osg::WARN) << "AnimationPathManipulator: Cannot open animation path file \"" << filename << "\".\n";
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_valid = false;
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return;
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}
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while( !feof( fp ))
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{
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double time;
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osg::Vec3 position;
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osg::Quat rotation;
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fscanf( fp, "%lf %f %f %f %f %f %f %f\n",
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&time, &position[0], &position[1], &position[2],
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&rotation[0], &rotation[1], &rotation[2], &rotation[3] );
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if( !feof(fp))
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_animationPath->insert(time,osg::AnimationPath::ControlPoint(position,rotation));
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}
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fclose(fp);
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}
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void AnimationPathManipulator::home(const GUIEventAdapter& ea,GUIActionAdapter&)
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{
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if (_animationPath.valid())
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{
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_timeOffset = _animationPath->getFirstTime()-ea.time();
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}
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// reset the timing of the animation.
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_numOfFramesSinceStartOfTimedPeriod=-1;
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}
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void AnimationPathManipulator::init(const GUIEventAdapter& ea,GUIActionAdapter& aa)
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{
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home(ea,aa);
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}
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bool AnimationPathManipulator::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& us)
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{
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if( !valid() ) return false;
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us = us;
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bool retval = false;
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switch( ea.getEventType() )
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{
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case GUIEventAdapter::FRAME:
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if( _isPaused )
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{
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handleFrame( _pauseTime );
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}
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else
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{
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handleFrame( ea.time() );
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}
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retval = true;
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break;
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case GUIEventAdapter::KEYDOWN:
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if (ea.getKey()==' ')
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{
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_isPaused = false;
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home(ea,us);
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us.requestRedraw();
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us.requestContinuousUpdate(false);
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return true;
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}
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else if(ea.getKey() == 'p')
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{
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if( _isPaused )
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{
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_isPaused = false;
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_timeOffset -= ea.time() - _pauseTime;
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}
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else
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{
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_isPaused = true;
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_pauseTime = ea.time();
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}
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us.requestRedraw();
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us.requestContinuousUpdate(false);
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return true;
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}
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retval = false;
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break;
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default:
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break;
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}
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return retval;
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}
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void AnimationPathManipulator::getUsage(osg::ApplicationUsage& usage) const
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{
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usage.addKeyboardMouseBinding("AnimationPath: Space","Reset the viewing position to start of animation");
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usage.addKeyboardMouseBinding("AnimationPath: p","Pause/resume animation.");
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}
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void AnimationPathManipulator::handleFrame( double time )
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{
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osg::AnimationPath::ControlPoint cp;
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double animTime = (time+_timeOffset)*_timeScale;
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_animationPath->getInterpolatedControlPoint( animTime, cp );
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if (_numOfFramesSinceStartOfTimedPeriod==-1)
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{
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_realStartOfTimedPeriod = time;
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_animStartOfTimedPeriod = animTime;
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}
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++_numOfFramesSinceStartOfTimedPeriod;
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double delta = (animTime-_animStartOfTimedPeriod);
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if (delta>=_animationPath->getPeriod())
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{
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double frameRate = (double)_numOfFramesSinceStartOfTimedPeriod/delta;
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std::cout <<"AnimatonPath completed in "<<delta<<" seconds, completing "<<_numOfFramesSinceStartOfTimedPeriod<<" frames,"<<std::endl;
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std::cout <<" average frame rate = "<<frameRate<<std::endl;
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// reset counters for next loop.
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_realStartOfTimedPeriod = time;
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_animStartOfTimedPeriod = animTime;
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_numOfFramesSinceStartOfTimedPeriod = 0;
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}
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cp.getMatrix( _matrix );
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}
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