关于camera与camera中的node的boundingsphere的问题

billong

1. int main( int argc, char **argv )
   
2. {
   
3. // use an ArgumentParser object to manage the program arguments.
   
4. osg::ArgumentParser arguments(&argc,argv);
   
5. 
   
6. // read the scene from the list of file specified commandline args.
   
7. osg::ref_ptr<osg::Node> loadedModel = osgDB::readNodeFiles(arguments);
   
8. 
   
9. // if not loaded assume no arguments passed in, try use default mode instead.
   
10. if (!loadedModel) loadedModel = osgDB::readNodeFile("cow.osg");
    
11. 
    
12. // if no model has been successfully loaded report failure.
    
13. if (!loadedModel)
    
14. {
    
15. std::cout << arguments.getApplicationName() <<": No data loaded" << std::endl;
    
16. return 1;
    
17. }
    
18. 
    
19. // construct the viewer.
    
20. osgViewer::Viewer viewer;
    
21. 
    
22. int xoffset = 300;
    
23. int yoffset = 150;
    
24. 
    
25. // left window + left slave camera
    
26. {
    
27. osg::ref_ptr<osg::GraphicsContext::Traits> traits = new osg::GraphicsContext::Traits;
    
28. traits->x = xoffset + 0;
    
29. traits->y = yoffset + 0;
    
30. traits->width = 600;
    
31. traits->height = 480;
    
32. traits->windowDecoration = true;
    
33. traits->doubleBuffer = true;
    
34. traits->sharedContext = 0;
    
35. 
    
36. osg::ref_ptr<osg::GraphicsContext> gc = osg::GraphicsContext::createGraphicsContext(traits.get());
    
37. viewer.getCamera()->setGraphicsContext(gc.get());
    
38. viewer.getCamera()->setViewport(new osg::Viewport(0,0, traits->width, traits->height));
    
39. }
    
40. 
    
41. 
    
42. // optimize the scene graph, remove rendundent nodes and state etc.
    
43. osgUtil::Optimizer optimizer;
    
44. optimizer.optimize(loadedModel.get());
    
45. 
    
46. // set the scene to render
    
47. viewer.setSceneData(loadedModel.get());
    
48. viewer.setCameraManipulator(new osgGA::TrackballManipulator());
    
49. //osg::ref_ptr<osg::Camera> camera1 = viewer.getCamera();
    
50. //std::cout<<camera->getBound().center().x()<<","<<camera->getBound().center().y()<<","<<camera->getBound().center().z()<<"ss\n";
    
51. 
    
52. while(!viewer.done())
    
53. {
    
54. viewer.frame();
    
55. std::cout<<viewer.getCamera()->getBound().radius()<<"crr\n";
    
56. std::cout<<loadedModel.get()->getBound().radius()<<"rr\n";
    
57. }
    
58. return 0;

复制代码

当发生缩放时，camera和node的包围球半径怎么一样 而且不变。

FlySky

std::cout<<viewer.getCamera()->computeBound().center().x()<<viewer.getCamera()->computeBound().center().y()<<viewer.getCamera()->computeBound().center().z()<<"crr\n";

tianxiao888

是不是要强制computeBound（）