求助:OSG在QT里面改变窗口大小后,出现窗口变黑的情况

fosky

1. osgViewer::View *grViewQtWindow::init( int x, int y, int w, int h, const std::string& name/*=""*/, bool windowDecoration/*=false*/ )
   
2.         {
   
3.                 osg::DisplaySettings* ds = osg::DisplaySettings::instance().get();
   
4.                 osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
   
5.                 traits->windowName = name;
   
6.                 traits->windowDecoration = windowDecoration;
   
7.                 traits->x = x;
   
8.                 traits->y = y;
   
9.                 traits->width = w;
   
10.                 traits->height = h;
    
11.                 traits->doubleBuffer = true;
    
12.                 traits->alpha = ds->getMinimumNumAlphaBits();
    
13.                 traits->stencil = ds->getMinimumNumStencilBits();
    
14.                 traits->sampleBuffers = ds->getMultiSamples();
    
15.                 traits->samples = ds->getNumMultiSamples();
    
16.                
    
17.                 osgViewer::View* view = new osgViewer::View;
    
18.                 osg::ref_ptr<osg::Camera> camera = view->getCamera();
    
19.                 view->getCamera()->setGraphicsContext( new osgQt::GraphicsWindowQt(traits.get()) );
    
20.                 view->getCamera()->setViewport( new osg::Viewport(x, y, w, h) );
    
21.                 double fovy, z1, z2, aspectRatio;
    
22.                 view->getCamera()->getProjectionMatrixAsPerspective(fovy,aspectRatio,z1,z2);
    
23.                 view->getCamera()->setProjectionMatrixAsPerspective(fovy, static_cast<double>(w)/static_cast<double>(h), z1, z2);
    
24.        
    
25. 
    
26.                 //view->setCamera( camera );
    
27. 
    
28.                 osgQt::GraphicsWindowQt* gw = dynamic_cast<osgQt::GraphicsWindowQt*>( camera->getGraphicsContext() );
    
29.                 m_gridLayout->addWidget( gw->getGraphWidget() );
    
30. 
    
31.                 return view;
    
32.         }

复制代码

这是创建View的代码,可以正常显示一个背景,但是,在改变窗口大小后,就会出现
QGLContext::makeCurrent() : wglMakeCurrent failed: ???????????????С?
这个错误,此时还能正常显示.
这样改变大小几次后,窗口就会变黑,什么也看不到了.
然后出现一堆这样的文字:
Warning: detected OpenGL error 'invalid operation' after applying attribute Text
ure2D 02D047E8
Warning: detected OpenGL error 'invalid operation' at end of State::apply(StateS
et*)
Warning: detected OpenGL error 'invalid operation' at start of State::apply()
Warning: detected OpenGL error 'invalid operation' after applying GLMode 0xb44
Warning: detected OpenGL error 'invalid operation' after applying attribute Mate
rial 02C99D90
Warning: detected OpenGL error 'invalid operation' after applying GLMode 0xde1
Warning: detected OpenGL error 'invalid operation' after applying attribute Text
ure2D 02D04A98
Warning: detected OpenGL error 'invalid operation' at end of State::apply()
Warning: detected OpenGL error 'invalid operation' at after RenderBin::draw(..)
Warning: detected OpenGL error 'invalid operation' at start of State::apply()
Warning: detected OpenGL error 'invalid operation' after applying GLMode 0xb50
Warning: detected OpenGL error 'invalid operation' after applying GLMode 0xb71
Warning: detected OpenGL error 'invalid operation' after applying GLMode 0x4000
Warning: detected OpenGL error 'invalid operation' after applying attribute Mate
rial 02C64158
Warning: detected OpenGL error 'invalid operation' after applying attribute Ligh
tModel 02D0C6C0
Warning: detected OpenGL error 'invalid operation' after applying attribute Blen
dFunc 00DB0028
Warning: detected OpenGL error 'invalid operation' after applying attribute Colo
rMask 02CFD298
Warning: detected OpenGL error 'invalid operation' after applying attribute View
port 00DD60B0
Warning: detected OpenGL error 'invalid operation' after applying attribute TexE
nv 02D0C758
Warning: detected OpenGL error 'invalid operation' at end of State::apply()
Warning: detected OpenGL error 'invalid operation' at end of SceneView::draw()

希望知道这个错误的人,指点下迷津!!!

fosky

此程序用的是一个独立的线程进行渲染操作

fosky

换成了用定时器去渲染,竟然没问题了.看来QT的多线程渲染还是有问题!!

fosky

竟然是自问自答

array

Qt的OpenGL操作封装的不太合理，容易出问题，楼主如果有研究收获的话不妨分享一下~~

xsyasxf

学习。。。。。。。。。