Evan O'Toole wrote:
You also will probably want to depth-sort the geometry, and make sure
it's drawn later than any opaque geometry (so the blending will work
properly):
stateSet->setRenderBinDetails(1, "DepthSortedBin");
The objects I'm drawing will need to be dynamically changed from opaque to
transparent at the user's request. For now, I'm just trying to figure out how
to get the transparency to work, but can the setRenderBinDetails function be
called later, or can it only be called as I'm creating the geometry?
I'm pretty sure it's a state like anything else, so you should be able
to change it on the fly. At the same time, you most likely could just
leave it in the transparent bin and be fine. You'll only get artifacts
if two different objects start interpenetrating.
One more tip. If you're going to be changing these dynamically, make
sure you mark them dynamic:
geometry->setDataVariance(osg::Object::DYNAMIC);
Also, when you make any changes, you'll have to let OSG know to
recompile the display list:
geometry->dirtyDisplayList();
If you're making a /lot/ of changes (say, once per frame), you might
want to disable display lists altogether (you won't need to make the
above call, then):
geometry->setUseDisplayList(false);
--"J"
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