407 lines
14 KiB
C++
407 lines
14 KiB
C++
// -*-c++-*-
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#include <osgViewer/Viewer>
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#include <osgDB/ReadFile>
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#include <osg/Geode>
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#include <osg/Geometry>
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#include <osg/StateSet>
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#include <osg/Material>
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#include <osg/Texture2D>
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#include <osg/TextureRectangle>
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#include <osg/TexMat>
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#include <osg/CullFace>
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#include <osg/ImageStream>
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#include <osg/io_utils>
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#include <osgGA/TrackballManipulator>
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#include <osgGA/EventVisitor>
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#include <iostream>
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osg::ImageStream* s_imageStream = 0;
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class MovieEventHandler : public osgGA::GUIEventHandler
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{
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public:
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MovieEventHandler() {}
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void set(osg::Node* node);
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virtual bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa, osg::Object*, osg::NodeVisitor* nv);
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virtual void getUsage(osg::ApplicationUsage& usage) const;
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typedef std::vector< osg::ref_ptr<osg::ImageStream> > ImageStreamList;
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protected:
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virtual ~MovieEventHandler() {}
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class FindImageStreamsVisitor : public osg::NodeVisitor
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{
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public:
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FindImageStreamsVisitor(ImageStreamList& imageStreamList):
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_imageStreamList(imageStreamList) {}
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virtual void apply(osg::Geode& geode)
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{
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apply(geode.getStateSet());
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for(unsigned int i=0;i<geode.getNumDrawables();++i)
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{
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apply(geode.getDrawable(i)->getStateSet());
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}
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traverse(geode);
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}
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virtual void apply(osg::Node& node)
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{
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apply(node.getStateSet());
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traverse(node);
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}
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inline void apply(osg::StateSet* stateset)
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{
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if (!stateset) return;
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osg::StateAttribute* attr = stateset->getTextureAttribute(0,osg::StateAttribute::TEXTURE);
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if (attr)
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{
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osg::Texture2D* texture2D = dynamic_cast<osg::Texture2D*>(attr);
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if (texture2D) apply(dynamic_cast<osg::ImageStream*>(texture2D->getImage()));
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osg::TextureRectangle* textureRec = dynamic_cast<osg::TextureRectangle*>(attr);
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if (textureRec) apply(dynamic_cast<osg::ImageStream*>(textureRec->getImage()));
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}
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}
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inline void apply(osg::ImageStream* imagestream)
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{
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if (imagestream)
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{
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_imageStreamList.push_back(imagestream);
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s_imageStream = imagestream;
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}
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}
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ImageStreamList& _imageStreamList;
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};
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ImageStreamList _imageStreamList;
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};
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void MovieEventHandler::set(osg::Node* node)
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{
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_imageStreamList.clear();
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if (node)
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{
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FindImageStreamsVisitor fisv(_imageStreamList);
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node->accept(fisv);
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}
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}
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bool MovieEventHandler::handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa, osg::Object*, osg::NodeVisitor* nv)
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{
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switch(ea.getEventType())
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{
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case(osgGA::GUIEventAdapter::MOVE):
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case(osgGA::GUIEventAdapter::PUSH):
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case(osgGA::GUIEventAdapter::RELEASE):
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{
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osgViewer::View* view = dynamic_cast<osgViewer::View*>(&aa);
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osgUtil::LineSegmentIntersector::Intersections intersections;
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if (view && view->computeIntersections(ea.getX(), ea.getY(), nv->getNodePath(), intersections))
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{
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// use the nearest intersection
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const osgUtil::LineSegmentIntersector::Intersection& intersection = *(intersections.begin());
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osg::Drawable* drawable = intersection.drawable.get();
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osg::Geometry* geometry = drawable ? drawable->asGeometry() : 0;
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osg::Vec3Array* vertices = geometry ? dynamic_cast<osg::Vec3Array*>(geometry->getVertexArray()) : 0;
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if (vertices)
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{
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// get the vertex indices.
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const osgUtil::LineSegmentIntersector::Intersection::IndexList& indices = intersection.indexList;
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const osgUtil::LineSegmentIntersector::Intersection::RatioList& ratios = intersection.ratioList;
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if (indices.size()==3 && ratios.size()==3)
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{
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unsigned int i1 = indices[0];
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unsigned int i2 = indices[1];
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unsigned int i3 = indices[2];
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float r1 = ratios[0];
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float r2 = ratios[1];
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float r3 = ratios[2];
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osg::Array* texcoords = (geometry->getNumTexCoordArrays()>0) ? geometry->getTexCoordArray(0) : 0;
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osg::Vec2Array* texcoords_Vec2Array = dynamic_cast<osg::Vec2Array*>(texcoords);
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if (texcoords_Vec2Array)
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{
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// we have tex coord array so now we can compute the final tex coord at the point of intersection.
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osg::Vec2 tc1 = (*texcoords_Vec2Array)[i1];
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osg::Vec2 tc2 = (*texcoords_Vec2Array)[i2];
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osg::Vec2 tc3 = (*texcoords_Vec2Array)[i3];
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osg::Vec2 tc = tc1*r1 + tc2*r2 + tc3*r3;
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osg::notify(osg::NOTICE)<<"We hit tex coords "<<tc<<std::endl;
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}
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}
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else
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{
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osg::notify(osg::NOTICE)<<"Intersection has insufficient indices to work with";
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}
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}
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}
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else
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{
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osg::notify(osg::NOTICE)<<"No intersection"<<std::endl;
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}
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break;
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}
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case(osgGA::GUIEventAdapter::KEYDOWN):
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{
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if (ea.getKey()=='s')
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{
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for(ImageStreamList::iterator itr=_imageStreamList.begin();
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itr!=_imageStreamList.end();
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++itr)
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{
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std::cout<<"Play"<<std::endl;
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(*itr)->play();
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}
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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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for(ImageStreamList::iterator itr=_imageStreamList.begin();
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itr!=_imageStreamList.end();
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++itr)
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{
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std::cout<<"Pause"<<std::endl;
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(*itr)->pause();
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}
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return true;
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}
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else if (ea.getKey()=='r')
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{
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for(ImageStreamList::iterator itr=_imageStreamList.begin();
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itr!=_imageStreamList.end();
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++itr)
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{
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std::cout<<"Restart"<<std::endl;
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(*itr)->rewind();
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(*itr)->play();
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}
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return true;
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}
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else if (ea.getKey()=='l')
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{
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for(ImageStreamList::iterator itr=_imageStreamList.begin();
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itr!=_imageStreamList.end();
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++itr)
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{
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if ( (*itr)->getLoopingMode() == osg::ImageStream::LOOPING)
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{
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std::cout<<"Toggle Looping Off"<<std::endl;
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(*itr)->setLoopingMode( osg::ImageStream::NO_LOOPING );
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}
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else
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{
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std::cout<<"Toggle Looping On"<<std::endl;
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(*itr)->setLoopingMode( osg::ImageStream::LOOPING );
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}
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}
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return true;
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}
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return false;
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}
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default:
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return false;
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}
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return false;
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}
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void MovieEventHandler::getUsage(osg::ApplicationUsage& usage) const
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{
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usage.addKeyboardMouseBinding("p","Pause movie");
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usage.addKeyboardMouseBinding("s","Play movie");
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usage.addKeyboardMouseBinding("r","Restart movie");
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usage.addKeyboardMouseBinding("l","Toggle looping of movie");
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}
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osg::Geometry* myCreateTexturedQuadGeometry(const osg::Vec3& pos,float width,float height, osg::Image* image, bool useTextureRectangle)
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{
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if (useTextureRectangle)
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{
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osg::Geometry* pictureQuad = osg::createTexturedQuadGeometry(pos,
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osg::Vec3(width,0.0f,0.0f),
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osg::Vec3(0.0f,0.0f,height),
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0.0f,image->t(), image->s(),0.0f);
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pictureQuad->getOrCreateStateSet()->setTextureAttributeAndModes(0,
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new osg::TextureRectangle(image),
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osg::StateAttribute::ON);
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return pictureQuad;
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}
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else
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{
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osg::Geometry* pictureQuad = osg::createTexturedQuadGeometry(pos,
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osg::Vec3(width,0.0f,0.0f),
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osg::Vec3(0.0f,0.0f,height),
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0.0f,1.0f, 1.0f,0.0f);
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osg::Texture2D* texture = new osg::Texture2D(image);
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texture->setFilter(osg::Texture::MIN_FILTER,osg::Texture::LINEAR);
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pictureQuad->getOrCreateStateSet()->setTextureAttributeAndModes(0,
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texture,
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osg::StateAttribute::ON);
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return pictureQuad;
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}
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}
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int main(int argc, char** argv)
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{
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// use an ArgumentParser object to manage the program arguments.
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osg::ArgumentParser arguments(&argc,argv);
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// set up the usage document, in case we need to print out how to use this program.
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arguments.getApplicationUsage()->setApplicationName(arguments.getApplicationName());
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arguments.getApplicationUsage()->setDescription(arguments.getApplicationName()+" example demonstrates the use of ImageStream for rendering movies as textures.");
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arguments.getApplicationUsage()->setCommandLineUsage(arguments.getApplicationName()+" [options] filename ...");
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arguments.getApplicationUsage()->addCommandLineOption("-h or --help","Display this information");
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arguments.getApplicationUsage()->addCommandLineOption("--texture2D","Use Texture2D rather than TextureRectangle.");
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arguments.getApplicationUsage()->addCommandLineOption("--shader","Use shaders to post process the video.");
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bool useTextureRectangle = true;
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bool useShader = false;
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// construct the viewer.
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osgViewer::Viewer viewer;
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while (arguments.read("--texture2D")) useTextureRectangle=false;
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while (arguments.read("--shader")) useShader=true;
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// if user request help write it out to cout.
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if (arguments.read("-h") || arguments.read("--help"))
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{
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arguments.getApplicationUsage()->write(std::cout);
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return 1;
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}
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osg::ref_ptr<osg::Geode> geode = new osg::Geode;
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osg::Vec3 pos(0.0f,0.0f,0.0f);
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osg::StateSet* stateset = geode->getOrCreateStateSet();
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stateset->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
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if (useShader)
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{
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//useTextureRectangle = false;
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static const char *shaderSourceTextureRec = {
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"uniform vec4 cutoff_color;\n"
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"uniform samplerRect movie_texture;\n"
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"void main(void)\n"
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"{\n"
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" vec4 texture_color = textureRect(movie_texture, gl_TexCoord[0]); \n"
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" if (all(lessThanEqual(texture_color,cutoff_color))) discard; \n"
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" gl_FragColor = texture_color;\n"
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"}\n"
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};
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static const char *shaderSourceTexture2D = {
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"uniform vec4 cutoff_color;\n"
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"uniform sampler2D movie_texture;\n"
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"void main(void)\n"
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"{\n"
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" vec4 texture_color = texture2D(movie_texture, gl_TexCoord[0]); \n"
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" if (all(lessThanEqual(texture_color,cutoff_color))) discard; \n"
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" gl_FragColor = texture_color;\n"
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"}\n"
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};
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osg::Program* program = new osg::Program;
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program->addShader(new osg::Shader(osg::Shader::FRAGMENT,
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useTextureRectangle ? shaderSourceTextureRec : shaderSourceTexture2D));
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stateset->addUniform(new osg::Uniform("cutoff_color",osg::Vec4(0.1f,0.1f,0.1f,1.0f)));
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stateset->addUniform(new osg::Uniform("movie_texture",0));
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stateset->setAttribute(program);
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}
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for(int i=1;i<arguments.argc();++i)
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{
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if (arguments.isString(i))
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{
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osg::Image* image = osgDB::readImageFile(arguments[i]);
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osg::ImageStream* imagestream = dynamic_cast<osg::ImageStream*>(image);
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if (imagestream) imagestream->play();
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if (image)
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{
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geode->addDrawable(myCreateTexturedQuadGeometry(pos,image->s(),image->t(),image, useTextureRectangle));
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pos.z() += image->t()*1.5f;
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}
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else
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{
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std::cout<<"Unable to read file "<<arguments[i]<<std::endl;
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}
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}
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}
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if (geode->getNumDrawables()==0)
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{
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// nothing loaded.
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arguments.getApplicationUsage()->write(std::cout);
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return 1;
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}
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// pass the model to the MovieEventHandler so it can pick out ImageStream's to manipulate.
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MovieEventHandler* meh = new MovieEventHandler();
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geode->setEventCallback(meh);
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meh->set(geode.get());
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// report any errors if they have occured when parsing the program aguments.
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if (arguments.errors())
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{
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arguments.writeErrorMessages(std::cout);
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return 1;
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}
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if (arguments.argc()<=1)
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{
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arguments.getApplicationUsage()->write(std::cout,osg::ApplicationUsage::COMMAND_LINE_OPTION);
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return 1;
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}
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// set the scene to render
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viewer.setSceneData(geode.get());
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// create the windows and run the threads.
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return viewer.run();
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}
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