[osg-users] Level of Detail

Daniel Moos danimoos at gmx.ch
Mon Oct 15 03:46:07 PDT 2007


How can I describe my problem?
I have a model loaded. This model i simplify with the OSG::Simplifier
Now I want to display the nearer Triangles of the Model from the original 
Model and the triangles with a higher distance from the simplified model. To 
do this, i want to use a LOD::Node.

Am Montag, 15. Oktober 2007 12.24:19 schrieb wangmiao:
> I have no idea what exactly you want, maybe you can give a little more
> detail of your problem.
>
> ----- Original Message -----
> From: "Daniel Moos" <danimoos at gmx.ch>
> To: "OpenSceneGraph Users" <osg-users at lists.openscenegraph.org>
> Sent: Monday, October 15, 2007 5:12 PM
> Subject: Re: [osg-users] Level of Detail
>
> > Thanks for your fast answer! It works very well!
> > But... I have an other question about LOD-Nodes. I can use a LOD to
> > display a Model with a specified distance. To calculate the distance the
> > bounding-box of the model is used. So i can set a complete model visible
> > or invisible.
> >
> > Give it a way to calculate the distance between the eye-point and a
> > single triangle from a model? LOD of triangles from a model?
> >
> > Thank you!
> > Daniel
> >
> > Am Montag, 15. Oktober 2007 09.48:00 schrieb wangmiao:
> >> The Lod node is used to manage a series of model node, you can attech
> >> models to it.But it will not simplify models for you. You need
> >> osgUtil::Simplifier to do it.Here is a simple example.....
> >> osgUtil::Simplifier sm;
> >>     sm.setDoTriStrip(false);
> >>     sm.setMaximumError(FLT_MAX);
> >>     sm.setMaximumLength(FLT_MAX);
> >>     sm.setSampleRatio(ratio);
> >>     sm.simplify(*newgeometry);
> >>     newgeode->addDrawable(newgeometry.get());
> >>
> >>
> >> ----- Original Message -----
> >> From: "Daniel Moos" <danimoos at gmx.ch>
> >> To: "OpenSceneGraph Users" <osg-users at lists.openscenegraph.org>
> >> Sent: Monday, October 15, 2007 3:00 PM
> >> Subject: [osg-users] Level of Detail
> >>
> >> > Hello Everybody.
> >> >
> >> > This User-Group is great... Thanks to all!
> >> >
> >> > I have a question about LOD (Level of Detail). I have a complex model
> >> > to load. The performance isn't good enough with such a complex model.
> >> > I want an LOD-Node in my program to display this complex model. Give
> >> > it a way to simplify a model in OpenSceneGraph? It will be nice to
> >> > generate a simpler model from a given model.
> >> >
> >> > Can OpenSceneGraph generate such a simpler model?
> >> >
> >> > Thanks to all!
> >> > Daniel
> >> > _______________________________________________
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> >> > osg-users at lists.openscenegraph.org
> >> > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.
> >> >org
> >>
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> >>g
> >
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