tethering to nodes in a 2D projected map not working...

[keince]

I have a mapNode that is using a spherical mercator map profile (projected 2D map). I'm adding some tracknodes to the mapNode and trying to tether the viewpoint to a selected node by the following...

Viewpoint vp = manipulator->getViewpoint();
vp.setNode(tracknode);
vp.range()->set(25000.0, Units::METERS);
vp.pitch()->set(-90.0, Units::DEGREES);
manipulator->setViewpoint(vp, 2.0);

For some reason, this doesn't tether to the tracknode as I would expect. When I run the same code for nodes in a geocentric map profile, it works as expected.

Is there something broken with tethering to nodes in projected map profiles? Perhaps I'm needing to perform a transform on the node somewhere first?

Any help or feedback would be appreciated...

[gwaldron]

The osgearth_manip example is the test app for tethered nodes. You can run this with a projected map (like openstreetmap_flat.earth or readymap_flat.earth) and press 8 or 9 to tether.

The problem might be with TrackNode so perhaps you can modify the example to use one and see if it still works.

[keince]

Glenn,

Thanks for the reply and suggestion. Per your recommendation, I altered osgearth_manip and replaced the following...

1. Changed osg::ref_ptr _geo with osg::ref_ptr _geo
2. Changed vp.setNode(_label) to vp.setNode(_geo->getGeoTransform());

Now I can tether to trackNodes!

If I change my code above from vp.setNode(tracknode) to vp.setNode(trackNode->getGeoTransform()), everything works. The key was using the getGeoTransform() call and not the trackNode itself when setting the node to tether in the viewPoint.

Thank you for your help!