274 lines
9.1 KiB
C++
274 lines
9.1 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* OpenSceneGraph Public License for more details.
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*/
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#include <osgUtil/Optimizer>
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#include <osgDB/ReadFile>
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#include <osg/Material>
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#include <osg/Geode>
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#include <osg/BlendFunc>
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#include <osg/Depth>
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#include <osg/Projection>
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#include <osg/PolygonOffset>
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#include <osg/MatrixTransform>
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#include <osg/Camera>
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#include <osg/FrontFace>
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#include <osgText/Text>
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#include <osgGA/TrackballManipulator>
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#include <osgGA/FlightManipulator>
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#include <osgGA/StateSetManipulator>
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#include <osgViewer/CompositeViewer>
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#include <osgFX/Scribe>
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#include <osg/io_utils>
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// class to handle events with a pick
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class PickHandler : public osgGA::GUIEventHandler {
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public:
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PickHandler():
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_mx(0.0f),
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_my(0.0f) {}
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~PickHandler() {}
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bool handle(const osgGA::GUIEventAdapter& ea,osgGA::GUIActionAdapter& aa)
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{
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osgViewer::View* view = dynamic_cast<osgViewer::View*>(&aa);
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if (!view) return false;
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switch(ea.getEventType())
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{
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case(osgGA::GUIEventAdapter::PUSH):
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{
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_mx = ea.getX();
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_my = ea.getY();
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break;
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}
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case(osgGA::GUIEventAdapter::RELEASE):
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{
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if (_mx==ea.getX() && _my==ea.getY())
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{
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pick(view, ea.getX(), ea.getY());
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}
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break;
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}
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default:
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break;
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}
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return false;
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}
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void pick(osgViewer::View* view, float x, float y)
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{
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osg::Node* node = 0;
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osg::Group* parent = 0;
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osgUtil::LineSegmentIntersector::Intersections intersections;
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if (view->computeIntersections(x, y, intersections))
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{
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osgUtil::LineSegmentIntersector::Intersection intersection = *intersections.begin();
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osg::NodePath& nodePath = intersection.nodePath;
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node = (nodePath.size()>=1)?nodePath[nodePath.size()-1]:0;
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parent = (nodePath.size()>=2)?dynamic_cast<osg::Group*>(nodePath[nodePath.size()-2]):0;
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}
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// now we try to decorate the hit node by the osgFX::Scribe to show that its been "picked"
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if (parent && node)
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{
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osgFX::Scribe* parentAsScribe = dynamic_cast<osgFX::Scribe*>(parent);
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if (!parentAsScribe)
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{
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// node not already picked, so highlight it with an osgFX::Scribe
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osgFX::Scribe* scribe = new osgFX::Scribe();
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scribe->addChild(node);
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parent->replaceChild(node,scribe);
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}
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else
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{
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// node already picked so we want to remove scribe to unpick it.
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osg::Node::ParentList parentList = parentAsScribe->getParents();
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for(osg::Node::ParentList::iterator itr=parentList.begin();
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itr!=parentList.end();
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++itr)
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{
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(*itr)->replaceChild(parentAsScribe,node);
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}
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}
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}
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}
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float _mx, _my;
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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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// read the scene from the list of file specified commandline args.
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osg::ref_ptr<osg::Node> scene = osgDB::readNodeFiles(arguments);
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if (!scene) return 1;
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// construct the viewer.
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osgViewer::CompositeViewer viewer;
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if (arguments.read("-1"))
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{
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{
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osgViewer::View* view = new osgViewer::View;
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view->setSceneData(osgDB::readNodeFile("fountain.osg"));
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view->setUpViewAcrossAllScreens();
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view->setCameraManipulator(new osgGA::TrackballManipulator);
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viewer.addView(view);
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}
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}
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if (arguments.read("-2"))
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{
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// view one
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{
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osgViewer::View* view = new osgViewer::View;
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viewer.addView(view);
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view->setUpViewOnSingleScreen(0);
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view->setSceneData(scene.get());
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view->setCameraManipulator(new osgGA::TrackballManipulator);
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// add the state manipulator
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osg::ref_ptr<osgGA::StateSetManipulator> statesetManipulator = new osgGA::StateSetManipulator;
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statesetManipulator->setStateSet(view->getCamera()->getOrCreateStateSet());
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view->addEventHandler( statesetManipulator.get() );
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}
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// view two
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{
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osgViewer::View* view = new osgViewer::View;
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viewer.addView(view);
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view->setUpViewOnSingleScreen(1);
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view->setSceneData(scene.get());
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view->setCameraManipulator(new osgGA::TrackballManipulator);
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// add the handler for doing the picking
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view->addEventHandler(new PickHandler());
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}
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}
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if (arguments.read("-3") || viewer.getNumViews()==0)
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{
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osg::GraphicsContext::WindowingSystemInterface* wsi = osg::GraphicsContext::getWindowingSystemInterface();
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if (!wsi)
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{
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osg::notify(osg::NOTICE)<<"Error, no WindowSystemInterface available, cannot create windows."<<std::endl;
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return 1;
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}
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unsigned int width, height;
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wsi->getScreenResolution(osg::GraphicsContext::ScreenIdentifier(0), width, height);
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osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
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traits->x = 100;
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traits->y = 100;
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traits->width = 1000;
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traits->height = 800;
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traits->windowDecoration = true;
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traits->doubleBuffer = true;
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traits->sharedContext = 0;
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osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
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if (gc.valid())
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{
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osg::notify(osg::INFO)<<" GraphicsWindow has been created successfully."<<std::endl;
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// need to ensure that the window is cleared make sure that the complete window is set the correct colour
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// rather than just the parts of the window that are under the camera's viewports
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gc->setClearColor(osg::Vec4f(0.2f,0.2f,0.6f,1.0f));
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gc->setClearMask(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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}
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else
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{
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osg::notify(osg::NOTICE)<<" GraphicsWindow has not been created successfully."<<std::endl;
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}
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// view one
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{
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osgViewer::View* view = new osgViewer::View;
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viewer.addView(view);
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view->setSceneData(scene.get());
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view->getCamera()->setViewport(new osg::Viewport(0,0, traits->width/2, traits->height/2));
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view->getCamera()->setGraphicsContext(gc.get());
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view->setCameraManipulator(new osgGA::TrackballManipulator);
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// add the state manipulator
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osg::ref_ptr<osgGA::StateSetManipulator> statesetManipulator = new osgGA::StateSetManipulator;
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statesetManipulator->setStateSet(view->getCamera()->getOrCreateStateSet());
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view->addEventHandler( statesetManipulator.get() );
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}
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// view two
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{
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osgViewer::View* view = new osgViewer::View;
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viewer.addView(view);
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view->setSceneData(scene.get());
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view->getCamera()->setViewport(new osg::Viewport(traits->width/2,0, traits->width/2, traits->height/2));
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view->getCamera()->setGraphicsContext(gc.get());
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view->setCameraManipulator(new osgGA::TrackballManipulator);
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// add the handler for doing the picking
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view->addEventHandler(new PickHandler());
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}
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// view three
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{
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osgViewer::View* view = new osgViewer::View;
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viewer.addView(view);
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view->setSceneData(osgDB::readNodeFile("cessnafire.osg"));
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view->getCamera()->setProjectionMatrixAsPerspective(30.0, double(traits->width) / double(traits->height/2), 1.0, 1000.0);
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view->getCamera()->setViewport(new osg::Viewport(0, traits->height/2, traits->width, traits->height/2));
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view->getCamera()->setGraphicsContext(gc.get());
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view->setCameraManipulator(new osgGA::TrackballManipulator);
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}
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}
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while (arguments.read("-s")) { viewer.setThreadingModel(osgViewer::CompositeViewer::SingleThreaded); }
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while (arguments.read("-g")) { viewer.setThreadingModel(osgViewer::CompositeViewer::ThreadPerContext); }
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while (arguments.read("-c")) { viewer.setThreadingModel(osgViewer::CompositeViewer::ThreadPerCamera); }
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// run the viewer's main frame loop
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return viewer.run();
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}
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