Hi Yura, Thanks for the explanation. I'm not entirely clear on what you are after, so will provide some general comments.
First up, in the OSG a parent node is always traversed before children, so if you stop traversal at a parent none of the children will be traversed. So if you set the NodeMask of the parent ot 0 then non of the children will be traversed. So you can't use this to achieve the result you want. The osg::Node's NodeMask is a 32bit mask which is and'd against the NodeVisitor's TraversalMask, for the cull traversal this TraversalMask is set by the View(er)'s Camera's(inherited from osg::CullSettings) setCullMask(). If the classes of objects you have are limited to 32 different components then it might be possible to use the NodeMask to toggle on/off different subgraphs by changing the CullMask. For insrtance your A, B, C, D etc. classifications could each be mapped to a separate bit, then your CullMask would set the appropriate bit you want to see at one time. If possible to use this approach it's really lightweight and utilizes standard OSG features. Another approach is to use osg::Switch to toggle on/off different subgrahs. Another approach is to use a custom osg::Group or NodeCallback that overrides the traverse implementation and makes it's own judgement on whether to traverse the children or not. For instance you might have some global state that tells you want parts you want to see, and this could global state could be shared between the callbacks/Nodes. Robert. On 27 April 2017 at 06:58, Yura Ivanov <[email protected]> wrote: > Hi, > > We have scene with a lot of objects (1_Scene.png). Objects that have same > name are instances of one object. Instances differ by transform. The count of > instances of the same object can be up to 1000. User at a single time must > see: > 1) all instances of one object (2_C_only.png, 4_F_only.png), or > 2) all instances of one object and it's direct children only > (3_C_and_1st_level.png). > > > Thank you! > > Cheers, > Yura[/img] > > ------------------ > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=70845#70845 > > > > > _______________________________________________ > osg-users mailing list > [email protected] > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
