I have nodes (models, text, etc.) that are positioned in XYZ coordinates that I wish to offset in screen space. My question is what's the best/fastest way to do this. An example follows. I have a piece of text that acts as a label for a point on a sphere. In this case that sphere is an osg ellipsoid model generated by virtual planet builder. I position the text at a given lat/lon/altitude which I translate to a XYZ world coordinate. However, I wish to offset the text in screen space by X,Y pixels. Imagine you want to label a point of interest on this globe but you want the label itself to be offset (updated every frame) by X pixels in the x-dimension and Y pixels in the y-dimension. I have one osg::MatrixTransform node acting as the parent of each text object. I have about 100 of these labels objects. I need to update the offset of the text every few frames. Doesn't have to be every frame, I can accept lazy updates - but it is something that needs to occur rather frequently.
What's the best way to accomplish this? I have something working but it's rather slow with 50 or more objects. I'm using IntersectVisitor in the algorithm which is killing performance. Any suggestions? _______________________________________________ osg-users mailing list [email protected] http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
