Hi Chris,
Chris Long wrote:
Hi,
Thanks a lot for the quick reply. Yes, that's definitely an
improvement. The demos now work better.
VIEW_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY looks good. But with
VIEW_DEPENDENT_WITH_PERSPECTIVE_OVERLAY, the geometry that the
overlay is pasted onto still turns all black in the osganimate and
osgspheresegment demos.
Changing the zfar doesn't seem to matter; using getPoints instead of
computeSilhouette is what does it.
Unfortunately, it doesn't solve my underlying problem (yet), which is
needing to overlay geometry that's far apart. When I run my app with
this modification, the overlaid geometry shows up in view-dependent
mode (yay!), but it's still rendering all the overlaid geometry so
the quality of the overlaid texture degrades as the bounding box of
the overlayid geometry increases (boo!). I tried it both with
perspective and orthographic rendering.
I'm thinking now that maybe if I look more into computeSilhouette I
might be able to get it to do what I want. But if you (or someone
else) has any ideas about it or about other approaches, I'd love to
hear it.
Only other advice I have is to look at this discussion and patch:
http://thread.gmane.org/gmane.comp.graphics.openscenegraph.cvs/4260
I'm not sure if this was ever integrated. I've not had success with
VIEW_DEPENDENT_WITH_PERSPECTIVE_OVERLAY either, I also encounter some
strange cases from some viewing angles, but I've just never had the time
to investigate further...
rgds
jp
Thank you!
Cheers, Chris
------------------ Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=26302#26302
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