自定义OSG窗口大小(设置Osgiewer)

àì夳堔傛蜴生んèń 2022-08-21 05:37 368阅读 0赞

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      }