Hi Robert, I remember I wondered the same thing my self. The method I (and I guess Vincent) wonders about is the: addChild (Node *child, float min, float max, const std::string &filename, float priorityOffset=0.0f, float priorityScale=1.0f)
Here you have to supply both a Node* and a filename. I didn't quite get why, so I skipped this and used the setFilename approach instead. Related question: What do the values "priorityOffset" and "priorityScale" control? The documentation is quite sparse when it comes to this... Best regards Björn > -----Ursprungligt meddelande----- > Från: osg-users-boun...@lists.openscenegraph.org > [mailto:osg-users-boun...@lists.openscenegraph.org] För Robert Osfield > Skickat: den 7 september 2009 13:03 > Till: OpenSceneGraph Users > Ämne: Re: [osg-users] PagedLod - How to > > Hi Vincent, > > You don't need to assign a node ptr, as you can set the > filename against a child number that isn't yet loaded. i.e. > > plod->setFileName(0, "firstlod.ive"); > plod->setFileName(1, "secondlod.ive"); > > Typically I'd actually assign the first child as an straight > subgraph that is loaded along with the PageLOD itself, then > the second child (with index 1) is the one that is loaded on > demand when the next up level of detail is required. This > external subgraph which is stored on disk will typically > contain a Group and four PageLOD, each of which will have > it's first child already assigned as part of this external > file, and then it's second child the external file reference. > This is repeat until you have the desired level of detail > for the high rest data you have. This approach creates a > balanced quad tree that is perfect for real-time rendering. > > Robert. > > > On Mon, Sep 7, 2009 at 11:33 AM, Vincent > Bourdier<vincent.bourd...@gmail.com> wrote: > > Hi all, > > > > Currently trying to set a PagedLod system on my model, I'm facing > > something strange for me : > > Adding a child on a PageLod node, I need to set a Node* AND > a filename ... > > > > Why do I need to set the node ptr ? if the pagedLod load > from disk the > > node, there is no need of the ptr, isn't it ? > > > > Thanks for the explanations. > > > > Regards, > > Vincent. > > > > _______________________________________________ > > osg-users mailing list > > osg-users@lists.openscenegraph.org > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph. > > org > > > > > _______________________________________________ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-opensce negraph.org > _______________________________________________ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
