I have looked at bit harder at the code now and I now realise that I
only partially fixed Sketchup's broken Collada stuff.
Sketchup is putting the texture image sampler reference into the
Collada diffuse parameter and sets the transparent
parameter to a fixed opaque white colour. The plugin
I have just looked at the latest Collada spec (1.5.1) and they have
changed the default for the opaque attribute of the transparent from
A_ONE (1 is opaque) to A_ZERO (0 is opaque). This would will fix some
of the Sketchup inconsistencies as and when Skertchup gets round to
specifying version
As a temporary workaround, I'm trying to fix my .dae models by modifying
their scenegraphs in the following way:
I created a node visitor that looks for Geodes whose blending in turned ON,
then for such geodes I change the the blending function in the way I wrote
in my previous mail and also
I'm experiencing some problem with collada models and transparency texture
maps. I saw that in May someone had the same problem but finally I couldn't
find a solution. I tried with osg2.2.0 and 2.6.0 and it looks like that
transparency doesn't work with collada models and png texture maps.
I
Hi Alessandro,
If you change this:
rendering_hint DEFAULT_BIN
to this:
rendering_hint TRANSPARENT_BIN
and then load the file in osgviewer, does that work?
The two things you need to get proper transparency is enabling GL_BLEND
and giving the TRANSPARENT_BIN rendering
Alessandro,
I put the GoogleMode flag into the dae writer in December 2007 after
examing the dae files ouput by Sketchup at that time. Here is the
comment from the SVN log.
8. User can supply an experimental GoogleMode option on output. The
plugin
will try to emulate the way Sketchup
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
alessandro terenzi
Sent: zaterdag 15 november 2008 12:09
To: OpenSceneGraph Users
Subject: [osg-users] PNG and Collada
I'm experiencing some problem with collada models and
transparency
I tried to set TRANSPARENT_BIN rendering hint but this didn't solve the
problem.
But I noticed another difference instead.
First I tried this:
- created a box in 3dsmax with a png texture applied in the diffuse slot
- exported using osgexp (keeping the original texture file, ie png)
- osgconv
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