HelixViewport3D on docking pane, model zooms out

Mar 14, 2013 at 3:38 PM
In my app, I add various Helix 3d objects (RectangleVisual3D, PipeVisual3D, etc) to the HelixViewPort3D via viewPort3D.Children.Add(new RectangleVisual3D), etc.

The HelixViewPort3D is hosted in an content Pane of a TabGroup of a docking control. When I click on other tabs, then click back on the tab that contains the viewport, the "model" zooms out (smaller), and continues to do so each time I click another tab then click back.

Any idea as to what this issue could be?
Apr 15, 2013 at 10:50 AM
Is ZoomExtentsWhenLoaded set to true in the HelixViewport3D? The control is probably unloaded when changing tabs...