<div>My question is essentially the same as this one (which was never answered): <a href="http://public.kitware.com/pipermail/igstk-users/2011-April/001083.html">http://public.kitware.com/pipermail/igstk-users/2011-April/001083.html</a></div>
<div><br></div><div>I want to let the user draw an arc to specify a location for further processingof the image, before beginning the procedure. I don't see how to do this directly from the IGSTK interface. I think maybe a TubeObject with a very small radius could approximate a arc/polyline and I could pick/drag the points, but that seems somewhat kludged.</div>
<div><br></div><div>I'm thinking that possibly I need to get the underlying vtkRenderWindowInteractor and use that, but I'm not finding docs or examples of doing that.</div><div><br></div><div>Can someone at leat point me in the right direction?</div>