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Hi Joan,
> 2) My file has a Material node that looks like:
>
> appearance Appearance { material Material { } }
Which is invalid, because it specifies no material/color.
>
> 3) I wrote out a version of it with much less geometry. I was able to
> load it in both osgviewer and in my program when I got rid of:
>
> Group { children [ here is the whole vrml file ] }
>
> which was around the whole thing.
I guess that this was not translated properly to the OSG hierarchy. I
will have a look at it. As I said before, the VRML plugin was intended
as a quick solution to load 3DS Max exported models and not as a general
VRML importer - there are thus some assumptions in the code which may
not be valid in general.
> 4) However, my vrml files has:
>
> color Color { color [ 0.000000 0.304099 0.989031, 0.000000 0.315067
> 1.000000, 0.000000 0.315067 1.000000, 0.000000 0.315067 1.000000,
> 0.000000 0.315067 1.000000, 0.000000 0.315067 1.000000, 0.000000
> 0.315067 1.000000, 0.000000 0.315067 1.000000, ] } colorPerVertex
> TRUE
>
> And after it loads it the color is gone. I wrote out the scene graph
> in .osg format immediately after loading the file and then looked at
> it. I should see something like:
>
> ColorBinding PER_VERTEX ColorArray Vec4Array 26238 { 0.532572
> 0.573407 0.544219 0.506753 ...
>
> in the .osg file but in the one that got saved after loading my test
> wrl file I dont get any colors. Getting per vertex colors into the
> scene graph is critical when doing scientific visualization as it is
> very common to color each vertex by the data value at that particular
> point in the data cube.
Color per vertex is not implemented in the plugin. It could be trivially
added, though. I can have a look at this next week when I am back from
vacation. It would help if you could provide me with a test file for the
development.
>
> 5) With osgviewer I can load my test wrl file and see the image of
> the geometry but with my own program, while I can load the wrl file,
> my program crashes whenever I start up or navigate to a position in
> which the geometry can actually be seen. It crashes in the call to:
>
> mSceneView ->draw();
>
> where:
>
> osg::ref_ptr< osgUtil::SceneView > mSceneView;
>
> This happens both when I load the wrl file and when I load the .osg
> file that I saved from it.
No idea about this - because the problem happens even if you load an
.osg file (whether exported from VRML or not is immaterial), I think
that the bug is elsewhere than in the VRML plugin. Moreover, since it
works with the osgviewer itself (which calls exactly the same code), I
would suspect that your custom code is doing something dodgy. Try to get
a full backtrace to see where exactly it crashes inside OSG.
Regards,
Jan
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