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。

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。

#include <osgDB/ReadFile>

#include <osgUtil/Optimizer>

#include <osgViewer/Viewer>

#include <osgViewer/ViewerEventHandlers>

#include <iostream>

 

void main( )

{

     osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFile("cow.osg");

     osgViewer::Viewer viewer;

     {

         osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;

         traits->x = 40;

         traits->y = 40;

         traits->width = 600;

         traits->height = 480;

         traits->windowDecoration = true;

         traits->doubleBuffer = true;

         traits->sharedContext = 0;

 

         osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());

 

         osg::ref_ptr<osg::Camera> 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 camera to the viewer, with a shift left of the projection matrix

         viewer.addSlave(camera.get());

     }

     osgUtil::Optimizer optimizer;

     optimizer.optimize(loadedModel.get());

     viewer.setSceneData(loadedModel.get());

     viewer.run();

}