64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
// C++ source file - (C) 2003 Robert Osfield, released under the OSGPL.
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//
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// Simple example of use of Producer::RenderSurface to create an OpenGL
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// graphics window, and OSG for rendering.
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#include <Producer/RenderSurface>
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#include <osgUtil/SceneView>
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#include <osgDB/ReadFile>
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#include <osgViewer/SimpleViewer>
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int main( int argc, char **argv )
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{
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if (argc<2)
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{
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std::cout << argv[0] <<": requires filename argument." << std::endl;
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return 1;
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}
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// load the scene.
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osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFile(argv[1]);
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if (!loadedModel)
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{
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std::cout << argv[0] <<": No data loaded." << std::endl;
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return 1;
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}
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// create the window to draw to.
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osg::ref_ptr<Producer::RenderSurface> renderSurface = new Producer::RenderSurface;
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renderSurface->setWindowName("osgsimple");
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renderSurface->setWindowRectangle(100,100,800,600);
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renderSurface->useBorder(true);
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renderSurface->realize();
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osgViewer::SimpleViewer viewer;
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viewer.setSceneData(loadedModel.get());
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// initialize the view to look at the center of the scene graph
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const osg::BoundingSphere& bs = loadedModel->getBound();
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osg::Matrix viewMatrix;
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viewMatrix.makeLookAt(bs.center()-osg::Vec3(0.0,2.0f*bs.radius(),0.0),bs.center(),osg::Vec3(0.0f,0.0f,1.0f));
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// main loop (note, window toolkits which take control over the main loop will require a window redraw callback containing the code below.)
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while( renderSurface->isRealized() )
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{
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// update the window dimensions, in case the window has been resized.
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viewer.getEventQueue()->windowResize(0,0,renderSurface->getWindowWidth(),renderSurface->getWindowHeight());
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// set the view
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viewer.getCamera()->setViewMatrix(viewMatrix);
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// advance the frame, handle events, update the scene and render it.
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viewer.frame();
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// Swap Buffers
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renderSurface->swapBuffers();
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}
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return 0;
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}
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