osg autotransform设置setAutoScaleToScreen失效

xxcc309

我想将OSG默认的3轴拖拽器修改为拖拽轴相对于屏幕缩放尺寸都不变，可是设置了setAutoScaleToScreen之后拖拽轴就会消失，不知道是哪里的原因，麻烦帮忙看下。

1. osg::ref_ptr<osg::AutoTransform> at = new osg::AutoTransform;
   
2. //at->setAutoScaleToScreen(true);//加上这句拖拽轴就会消失
   
3. osg::Geode* lineGeode = new osg::Geode;
   
4. {
   
5. osg::Geometry* geometry = new osg::Geometry();
   
6. 
   
7. osg::Vec3Array* vertices = new osg::Vec3Array(2);
   
8. (*vertices)[0] = osg::Vec3(0.0f,0.0f,0.0f);
   
9. (*vertices)[1] = osg::Vec3(0.0f,0.0f,1.0f);
   
10. 
    
11. geometry->setVertexArray(vertices);
    
12. geometry->addPrimitiveSet(new osg::DrawArrays(osg::PrimitiveSet::LINES,0,2));
    
13. 
    
14. lineGeode->addDrawable(geometry);
    
15. }
    
16. // Turn of lighting for line and set line width.
    
17. {
    
18. osg::LineWidth* linewidth = new osg::LineWidth();
    
19. linewidth->setWidth(3.0f);
    
20. lineGeode->getOrCreateStateSet()->setAttributeAndModes(linewidth, osg::StateAttribute::ON);
    
21. lineGeode->getOrCreateStateSet()->setMode(GL_LIGHTING,osg::StateAttribute::OFF);
    
22. }
    
23. 
    
24. at->addChild(lineGeode);
    
25. _xDragger->addChild(at);
    
26. _yDragger->addChild(at);
    
27. _zDragger->addChild(at);
    
28. 
    
29. osg::Geode* geode = new osg::Geode;
    
30. 
    
31. // Create a cone.
    
32. {
    
33. osg::Cone* cone = new osg::Cone (osg::Vec3(0.0f, 0.0f, 1.0f), 0.025f, 0.10f);
    
34. geode->addDrawable(new osg::ShapeDrawable(cone));
    
35. }
    
36. 
    
37. // Create an invisible cylinder for picking the line.
    
38. {
    
39. osg::Cylinder* cylinder = new osg::Cylinder (osg::Vec3(0.0f,0.0f,0.5f), 0.015f, 1.0f);
    
40. osg::Drawable* geometry = new osg::ShapeDrawable(cylinder);
    
41. setDrawableToAlwaysCull(*geometry);
    
42. geode->addDrawable(geometry);
    
43. }
    
44. 
    
45. // 添加箭头拖拽按钮到线拖拽器
    
46. osg::ref_ptr<osg::AutoTransform> at1 = new osg::AutoTransform;
    
47. //at1->setAutoScaleToScreen(true);
    
48. at1->addChild(geode);
    
49. _xDragger->addChild(at1);
    
50. _yDragger->addChild(at1);
    
51. _zDragger->addChild(at1);
    
52. 
    

复制代码

之后的代码应该和这个没有关系了，这些是关键代码。

array

osgmanipulator例子里面我提供了一种做法，不用修改Dragger的内部实现，您不妨参看一下

tianxiao888

例子里有么，我看戏啊~

xxcc309

osgmanipulator的例子我看过了，只有TrackballDragger可以直接通过设置参数实现，而且我看了下TrackballDragger内部代码，实现方法也是通过setAutoScaleToScreen来实现的，您说的提供的方法是TrackballDragger中的方法吗？还是说我遗漏了什么关键代码？还请指教.

array

我指得是DraggerContainer，如果您没有找到这个类，说明您的没有check out足够新的版本

xxcc309

谢谢array，更新版本后找到了。