Hello,
I've encountered a problem when using the OpenFlight plugin with
preserveFace/preserveObject option not used.
If the perserveFace options is not used, the importer uses the Optimizer
with the following options:
osgUtil::Optimizer::SHARE_DUPLICATE_STATE |
osgUtil::Optimizer::MERGE_GEOMETRY |
osgUtil::Optimizer::MERGE_GEODES |
osgUtil::Optimizer::TESSELLATE_GEOMETRY |
osgUtil::Optimizer::STATIC_OBJECT_DETECTION;
This unfortunately breaks the sorting of transparent objects, as in my
example all forests (represented by simple quads/polygons) are put into
one geode.
After digging into the optimizer, I realized, that it will not check if
the statesets contain any transparency.
Would you consider this rather a bug in the Optimizer or more a
mis-usage in the OpenFlight importer?
As the osgviewer doesn't disable depth writes for transparent objects,
the problem is only visible if you use the transparent-bin with depth
writes off, which leads me to another question:
Would it be wise to turn off depth writes for the transparent bin by
default ( or a least make it configurable for the osgviewer)?
cheers
Sebastian
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