如何读取Image并正常显示

xiao_ye312

我想读取本地一张图片，并显示出来，设定viewer窗口的大小和图片分辨率一样的，为什么显示不正常呢,图片偏到右上角了。

1.         osg::ref_ptr<osg::Image> image=osgDB::readImageFile("my_pic.bmp");
   
2.         osgViewer::Viewer viewer;
   
3. 
   
4.         osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
   
5.         traits->x = 30;
   
6.         traits->y = 20;
   
7.         traits->width = 600;
   
8.         traits->height = 480;
   
9.         traits->windowDecoration = true;
   
10.         traits->doubleBuffer = true;
    
11.         traits->sharedContext = 0;
    
12.         traits->pbuffer=false;
    
13.         osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
    
14.         viewer.getCamera()->setGraphicsContext(gc.get());
    
15.         viewer.getCamera()->setViewport(0,0,600,480);
    
16.         osg::ref_ptr<osg::DrawPixels> bmp=new osg::DrawPixels;
    
17. 
    
18.         bmp->setPosition(osg::Vec3(0,0,0));
    
19.         bmp->setImage(image.get());
    
20.         osg::ref_ptr<osg::Geode> geode=new osg::Geode;
    
21.         geode->addDrawable(bmp.get());
    
22.         viewer.setSceneData(geode.get());
    
23.         viewer.run();

复制代码

array

您搞错了model坐标和窗口坐标的关系了，请先阅读一下3D图形学相关知识

bighugecat

问题解决了吗？