[osg-users] Converting PrimitiveSet to use triangles instead of triangle strips / fans?

[Jordi Torres]

Hi,

There is an option in the obj plugin to avoid tristrips. It's probably
better to try this cause tristripping is not cheap depending on the
geometry.

>From the top of my head is something like "noTrisStripPolygons".

Hope it helps.

El jue., 16 ago. 2018 12:30 a. m., Julien Valentin <
julienvalentin51 at gmail.com> escribió:

> INDEX_mesh don't reindex indexed
> I fix it on my branch introducing a forceReindex parameter to the
> IndexMeshVisitor and use it witout an attached Optimizer
>
>
> L. Voerman wrote:
> > I tend to use set OSG_OPTIMIZER=INDEX_MESH VERTEX_POSTTRANSFORM
> VERTEX_PRETRANSFORM
> >
> > for these, but there might be something else preventing the optimizer
> from changing your geometry.
> > set OSG_OPTIMIZER=STATIC_OBJECT_DETECTION  INDEX_MESH
> VERTEX_POSTTRANSFORM VERTEX_PRETRANSFORM MERGE_GEOMETRY MERGE_GEODES
> >
> > might do the trick
> > Laurens.
> >
> >
> > On Wed, Aug 15, 2018 at 9:10 AM Jad Killian < ()> wrote:
> >
> >
> > > Hi,
> > >
> > > When I import a .obj file with readNodeFile, the result is a triangle
> strip instead of triangles. Even if the .obj file is a simple square with 4
> vertices and 2 triangular faces, the resulting primitive set in the geode
> geometry contains
> > > 1 face, 4 indices with mode = 5 (TRIANGLE_STRIP).
> > >
> > > I tried using the osg::Optimizer, but it doesn't seem to do anything:
> > >
> > >
> > >
> > > Code:
> > > osg::ref_ptr<osg::Node> node =
> osgDB::readNodeFile(filepath.toStdString());
> > >
> > > osgUtil::Optimizer optimizer;
> > > optimizer.optimize(node, osgUtil::Optimizer::INDEX_MESH);
> > >
> > >
> > >
> > > for optimizer flags I tried INDEX_MESH, TESSELLATE_GEOMETRY,
> DEFAULT_OPTIMIZATIONS, nothing seems to work.
> > >
> > > Any ideas?
> > >
> > > Thanks
> > >
> > > ------------------
> > > Read this topic online here:
> > > http://forum.openscenegraph.org/viewtopic.php?p=74401#74401 (
> http://forum.openscenegraph.org/viewtopic.php?p=74401#74401)
> > >
> > >
> > >
> > >
> > >
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> ------------------------
> Twirling twirling twirling toward freedom
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> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=74538#74538
>
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