Hi Sebastian,
that is actually a good idea to do the traversal first. Let me try it
first. Thanks !
Nick
On Thu, Dec 19, 2013 at 11:51 AM, Sebastian Messerschmidt <
sebastian.messerschm...@gmx.de> wrote:
> Am 19.12.2013 09:26, schrieb Trajce Nikolov NICK:
>
> Hi Nick,
>
> My first question would be: Why don't you simply attach the windshield to
> the model ;-)
> No seriously, I had those effects too, when retrieving e.g. the ModelView
> matrix in callbacks. The problem usually was gone whe doing the traverse
> first and the get the matrices.
> Maybe you can give it a try, or paste some of your update-callback code
> here, so we can help.
>
> So basically this:
> void CameraUpdateCallback::operator()( osg::Node* node, osg::NodeVisitor*
> nv )
> {
> osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(nv);
> if (!cv)
> {
> return;
> }
> traverse(node,nv);
>
> osg::Camera& camera = *cv->getRenderInfo().getView()->getCamera();
> camera.getViewMatrix() ....
> }
>
> will yield different results than this:
>
> void CameraUpdateCallback::operator()( osg::Node* node, osg::NodeVisitor*
> nv )
> {
> osgUtil::CullVisitor* cv = dynamic_cast<osgUtil::CullVisitor*>(nv);
> if (!cv)
> {
> return;
> }
>
>
> osg::Camera& camera = *cv->getRenderInfo().getView()->getCamera();
> camera.getViewMatrix() ....
>
> traverse(node,nv);
> }
>
> This at least solved problems in multipass-rendering, where multiple
> cameras had to be synced relative to each other.
>
> Hope this helps.
>
> cheers
> Sebastian
>
> Hi Community,
>
> I have a simple scene of a car model with a windshield (two separate
> models combined in runtime). There is osg::MatrixTransform node on top of
> the car that moves it around, and the windshield is attached to the scene
> that also has osg::MatrixTransform on top of it with an UpdateCallback that
> copies the car's matrix.
>
> ( the real scene is a bit different but this is the concept)
>
> I am seeing the windshild has some delay in following the car model
> while moving and at lower framerates. I think I just tried everything but
> always this is the same case
>
> Any clue and hints?
>
> Thanks a bunch!
>
> Nick
>
> --
> trajce nikolov nick
>
>
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--
trajce nikolov nick
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