Hi Denis,
first question: OpenSG 1 or 2?
On 02/12/2011 07:21 AM, Denis Röper wrote:
> Hello,
>
> I created some osg::Surface nodes and now I want to fetch all the
> triangles rendered from these nodes. I used the TriangleIterator to do
> this, but usually I got no Triangles.
>
> I can put the node into the scene graph and hide it with a
> ColorMaskChunk, wait until it is rendered or call the osg::RenderAction
> on it (Is this ok for osg::Surface?), but still I get no Triangles.
> Since I create the node in a thread I synchronise both change lists
> already.
OK.
> Usually I don't want to see this node, so a method without adding the
> node into the scene graph will be fine, but the ColorMaskChunk is fine,
> too. But its still not function.
That shouldn't make a difference.
> I wrote a simple test program that fetches the Triangles in the
> "display" callback function after the redraw() call. Here I got the
> Triangles.
...and not before that? That is weird. Can you send us the program?
The TriangleIterator doesn't really depend on anything, as long as the geometry
has the required data it should work just fine. And the rendering run should
not
change any data in the Geometry, so the fact that it makes a difference is very
surprising.
> Any suggestions? A method without the need to wait for redraw will be
> great.
Of course! And it should work like that. If you could send us the program that
would help a lot.
Yours
Dirk
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