I'm doing some large terrain rendering using OSG where I put small bulletins (billboards) which I wan't to make clickable. For this I found the osgPicker example and implemented it and all worked well.
However in an extension of this I moved the camera to a bulletin to supply additional clickable billboards (ie move inside a clicked house and look in the drawer inside the house). These additional billboards are relatively small compared to my world (several kilometers, the small billboard being about a meter in radius) and my intersection fails 95% of the time. If I move the camera out and make the larger (so that I can see them from a distance) everything works again. No change in code or scenegraph structure except the position set by the camera manipulator. I'm wondering if there are any known issues with intersection tests since I presume these are done in single precision. Does it do double calculations for MatrixTransforms (I tried putting a matrix transform having local coordinates for the smaller objects as well with no luck). Any other ideas as how to tackle this? Cheers, Adrian ------------------ Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=26250#26250 _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
