Thank you Karthik. Could I get suggestion from you about where to start from on this. Is there an example that I refer to?<br clear="all">-----------<br>Anant S. Vemuri<br>email: <a href="mailto:ajar108@gmail.com">ajar108@gmail.com</a><br>
<br>
<br><br><div class="gmail_quote">On Fri, Mar 12, 2010 at 12:55 PM, Karthik Krishnan <span dir="ltr"><<a href="mailto:karthik.krishnan@kitware.com">karthik.krishnan@kitware.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
This is an issue that remains to be dealt with. Although the<br>
widget-representations derive from vtkProp and hence support the use<br>
of UserTransform's, the interactors that drive the these<br>
transformations into account. This leads to a mismatch between the<br>
positions that the interactor believes the widget is placed at and the<br>
actual position/orientation of is geometry.<br>
<br>
This is not an easy issue. Most widgets can get transformed into an<br>
invalid state by giving users the flexbility of transforming them with<br>
UserTransform's. This includes image plane widgets, contour widgets<br>
etc.. It also does not play very nicely with the point placer<br>
framework that is designed to restrict the widget placement to certain<br>
locations / regions etc.<br>
<br>
What I would recommend is that you create a customized<br>
widget-representation pair for your needs. The handle widget as<br>
designed now is not meant to handle UserTransforms.<br>
<br>
Thanks<br>
--<br>
karthik<br>
<div><div></div><div class="h5"><br>
On Thu, Mar 11, 2010 at 11:17 PM, Anant Vemuri <<a href="mailto:ajar108@gmail.com">ajar108@gmail.com</a>> wrote:<br>
> Hi,<br>
> I am using vtkPolygonalHandleRepresentation3D to control position of a model<br>
> I created. I am trying to apply a transformation matrix to it to make it<br>
> move in a predefined way. For doing this I have a bunch of vtkTransforms.<br>
> At first, (before using vtkPolygonalHandleRepresentation3D) I applied the<br>
> transform through the Actor using myActor->SetUserTransform( myvtkTransform<br>
> )<br>
> But since I also wanted to create an interaction with the object, I put it<br>
> inside a vtkPolygonalHandleRepresentation3D by deriving a class called<br>
> myObjectRepresentation from vtkPolygonalHandleRepresentation3D. But now I am<br>
> no longer able to apply the transform to the object properly.<br>
> Since vtkPolygonalHandleRepresentation3D has a member variable called Actor,<br>
> I created a function<br>
> void myObjectRepresentation::SetTransform( vtkTransform *_trf )<br>
> {<br>
> this->Actor->SetUserTransform( _trf );<br>
> }<br>
> This does the trick, but after I apply the trasnform I am not able to<br>
> interact with the object properly. It moves in some random direction when I<br>
> try to move it.<br>
> Can someone help me out. I can provide more details on request.<br>
> Thank you.<br>
><br>
</div></div>> _______________________________________________<br>
> Powered by <a href="http://www.kitware.com" target="_blank">www.kitware.com</a><br>
><br>
> Visit other Kitware open-source projects at<br>
> <a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
><br>
> Please keep messages on-topic and check the VTK FAQ at:<br>
> <a href="http://www.vtk.org/Wiki/VTK_FAQ" target="_blank">http://www.vtk.org/Wiki/VTK_FAQ</a><br>
><br>
> Follow this link to subscribe/unsubscribe:<br>
> <a href="http://www.vtk.org/mailman/listinfo/vtkusers" target="_blank">http://www.vtk.org/mailman/listinfo/vtkusers</a><br>
><br>
><br>
</blockquote></div><br>