OpenSceneGraph中的窗体模式运行是怎样的
OpenSceneGraph中的窗体模式运行是怎样的,很多新手对此不是很清楚,为了帮助大家解决这个难题,下面小编将为大家详细讲解,有这方面需求的人可以来学习下,希望你能有所收获。
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1.使用osgViewer::Viewer代替原来的osgProducer::Viewer 2.先熟悉设计模式,比如最常用的Visitor设计模式。要不然看不懂程序不说,而且更写不出程序。 3.窗体模式运行参考Example osgWindows,在这个例子中重点在于:
osg::ref_ptr traits = new osg::GraphicsContext::Traits; traits->x = 640; traits->y = 0; traits->width = 640; traits->height = 480; traits->windowDecoration = true; traits->doubleBuffer = true; traits->sharedContext = 0; osg::ref_ptr gc = osg::GraphicsContext::createGraphicsContext(traits.get()); osg::ref_ptr camera = new osg::Camera; camera->setGraphicsContext(gc.get()); camera->setViewport(new osg::Viewport(0,0, traits->width, traits->height)); GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT; camera->setDrawBuffer(buffer); camera->setReadBuffer(buffer); // add this slave camra to the viewer, with a shift right of the projection matrix viewer.addSlave(camera.get(), osg::Matrixd::translate(-1.0,0.0,0.0), osg::Matrixd());
另外Example osgkeyboardmouse也提到了另外一种方式:
// create the window to draw to. osg::ref_ptr traits = new osg::GraphicsContext::Traits; traits->x = 200; traits->y = 200; traits->width = 800; traits->height = 600; traits->windowDecoration = true; traits->doubleBuffer = true; traits->sharedContext = 0; osg::ref_ptr gc = osg::GraphicsContext::createGraphicsContext(traits.get()); osgViewer::GraphicsWindow* gw = dynamic_cast(gc.get()); if (!gw) { osg::notify(osg::NOTICE)<<"Error: unable to create graphics window."< return 1; } gw->realize(); gw->makeCurrent(); // create the view of the scene. osgViewer::SimpleViewer viewer; viewer.setSceneData(loadedModel.get()); viewer.setEventQueue(gw->getEventQueue()); viewer.getEventQueue()->windowResize(traits->x,traits->y,traits->width,traits->height);
TODO: 1.3DS导入插件还不够完善,需要自己写。 2.更深入的了解OSG的机制。
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