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

[Julien Valentin]

Hi Jordi
I admit I haven't read the question but the topic title remind me of a pr i haven't made...
Should'nt it be default obj plugin behavior not to strip instead of an option one have to set?
Is this pr valid to you?
https://github.com/openscenegraph/OpenSceneGraph/pull/597
Cheers


Jordi Torres wrote:
> 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 < ()> 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
> > > > 
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> > > > 
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> > > > 
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