> -----Message d'origine-----
> Objet : Re: [osg-users] Question about osgSim::OverlayNode behaviour
>
> Hi Luc,
>
> On 8/9/07, Frauciel Luc <[EMAIL PROTECTED]> wrote:
> > When using an OverlayNode to project a flat polygon on a
> DEM, the polygon is not shaded using the DEM normals (see
> image attached).
> > Is it an intended behaviour ?
> > The mode used is OBJECT_DEPENDENT_WITH_ORTHOGRAPHIC_OVERLAY
> >
> > Is there a way to make the polygon shaded ?
>
> The shading of the pre rendering stage is down to lighting
> you have set up on the overlay subgraph.
>
I don't want to touch to the ligthining of the overlay subgraph (in fact
I'd like to use no lighting for it at all).
What I'd like to do is to use the destination lighting (here a DEM) to
shade the texture generated by the overlay subgraph (same result as
osgdem, but with geometry instead of imagery).
By the way, isn't "overlay_perspective_main.vert" missing on
OpenSceneGraph-Data svn ?
Luc
> Robert.
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> negraph.org
>
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