动态改变视口大小问题

white_water125

我想实现组合视图间的切换功能，就是一个视图显示，一个不显示，利用setviewport，有效果，但是场景变形，模型好像被拉伸了，而这样设置完后，只有resize一下窗口，才能恢复正常显示比例，请问这是为什么，如果解决？

liuzhiyu123

setviewport后从新调整一下摄像机的投影矩阵h/w

white_water125

谢谢，我试过，切换时似乎可以，但是远近比例似乎变了，再resize一下窗口时，场景模型好像被压扁似的，恢复不到最初的比例，我设置的比例跟起先是一样的，不知为何？

white_water125

        pView1->initialize(pGraphicsContext.get(), false);
        pView1->getContext()->getCamera()->setClearColor(osg::Vec4f(0.0f, 0.0f, 0.0f, 1.0f));
        pView1->getContext()->getCamera()->setViewport(new osg::Viewport(traits->x, traits->y, traits->width, traits->height));
        pView1->getContext()->getViewer()->getCamera()->setProjectionMatrixAsPerspective(45.0, double(traits->width) / double(traits->height), 1.0, 1000.0);
        pView1->getContext()->getCamera()->setComputeNearFarMode(osg::CullSettings::COMPUTE_NEAR_FAR_USING_PRIMITIVES);
        pView1->getContext()->getCamera()->setNearFarRatio(0.00001f);
       
        pView2->initialize(pGraphicsContext.get(), false);
        pView2->getContext()->getCamera()->setClearColor(osg::Vec4f(1.0f, 1.0f, 1.0f, 1.0f));
        pView2->getContext()->getCamera()->setViewport(new osg::Viewport(traits->x, traits->y, 0, 0));
        pView2->getContext()->getViewer()->getCamera()->setProjectionMatrixAsPerspective(45.0, double(traits->width) / double(traits->height), 1.0, 1000.0);
        pView2->getContext()->getCamera()->setComputeNearFarMode(osg::CullSettings::COMPUTE_NEAR_FAR_USING_PRIMITIVES);
        pView2->getContext()->getCamera()->setNearFarRatio(0.00001f);
       
                if(pView1)
                {
                        pView1->getContext()->getCamera()->setViewport(0, 0, 0, 0);
                }

                if(pView2)
                {
                        pView2->getContext()->getCamera()->setViewport(0, 0, width, height);
                        pView2->getContext()->getCamera()->setProjectionMatrix(osg::Matrix::perspective(45.0, double(width) / double(height), 1.0, 1000.0));