Re: [osg-users] Intersection tests on paged PagedLODs
I finally got some time to try this and it's exactly what I needed. Another point I was missing was setting the range on the PagedLODs. I had a bounding vol defined but not the range. Thanks for the tip! -Trystan -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=38143#38143 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Intersection tests on paged PagedLODs
Hi all, I'm looking for a way to selectively load PagedLODs saved to files on an intersection test. I've built up an Octree represented by a PagedLOD node for each subdivision (similar to the quad-tree example in the 3.0 beginner's guide). Given an arbitrary point or line, I want to be able to test the PagedLODs it intersects with without having unnecessary ones loaded into memory. I gather that intersection visitors will only traverse loaded PagedLODs but won't automatically trigger the database pager to load additional levels (is that correct?). Would I need to create a custom visitor to do this or is there an easier way that I'm missing? Thanks in advance, Trystan -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=37568#37568 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Intersection tests on paged PagedLODs
Hi Trystan, Try using IntersectionVisitor::setReadCallback() to set a custom callback for reading paged files into memory (or any other operation you wish). The node loaded at runtime will automatically be removed after the traversal of the subgraph. BTW, thanks for supporting the 3.0 Beginners Guide book. :-) Cheers, Wang Rui 2011/3/13 Trystan Larey-Williams trys...@trystan.org: Hi all, I'm looking for a way to selectively load PagedLODs saved to files on an intersection test. I've built up an Octree represented by a PagedLOD node for each subdivision (similar to the quad-tree example in the 3.0 beginner's guide). Given an arbitrary point or line, I want to be able to test the PagedLODs it intersects with without having unnecessary ones loaded into memory. I gather that intersection visitors will only traverse loaded PagedLODs but won't automatically trigger the database pager to load additional levels (is that correct?). Would I need to create a custom visitor to do this or is there an easier way that I'm missing? Thanks in advance, Trystan -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=37568#37568 ___ 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-openscenegraph.org
