自定义窗口大小并且让定义在自定义窗口的什么位置显示，窗口可以拖动。
1 #include <osgDB/ReadFile> 2 #include <osgUtil/Optimizer> 3 #include <osgViewer/Viewer> 4 #include <osgViewer/ViewerEventHandlers> 5 #include <iostream> 6 7 void main( ) 8 { 9 osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFile("cow.osg"); 10 osgViewer::Viewer viewer; 11 { 12 osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits; 13 traits->x = 40; 14 traits->y = 40; 15 traits->width = 600; 16 traits->height = 480; 17 traits->windowDecoration = true; 18 traits->doubleBuffer = true; 19 traits->sharedContext = 0; 20 21 osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get()); 22 23 osg::ref_ptr<osg::Camera> camera = new osg::Camera; 24 camera->setGraphicsContext(gc.get()); 25 camera->setViewport(new osg::Viewport(0,0, traits->width, traits->height)); 26 GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT; 27 camera->setDrawBuffer(buffer); 28 camera->setReadBuffer(buffer); 29 30 // add this slave camera to the viewer, with a shift left of the projection matrix 31 viewer.addSlave(camera.get()); 32 } 33 osgUtil::Optimizer optimizer; 34 optimizer.optimize(loadedModel.get()); 35 viewer.setSceneData(loadedModel.get()); 36 viewer.run(); 37 }
其中关键的是:
{ 12 osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits; 13 traits->x = 40; 14 traits->y = 40; 15 traits->width = 600; 16 traits->height = 480; 17 traits->windowDecoration = true; 18 traits->doubleBuffer = true; 19 traits->sharedContext = 0; 20 21 osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get()); 22 23 osg::ref_ptr<osg::Camera> camera = new osg::Camera; 24 camera->setGraphicsContext(gc.get()); 25 camera->setViewport(new osg::Viewport(0,0, traits->width, traits->height)); 26 GLenum buffer = traits->doubleBuffer ? GL_BACK : GL_FRONT; 27 camera->setDrawBuffer(buffer); 28 camera->setReadBuffer(buffer); 29 30 // add this slave camera to the viewer, with a shift left of the projection matrix 31 viewer.addSlave(camera.get()); 32 }