Hi gishu,<br /><br />
what about using vtkInteractorStyleImage?

<pre> vtkSmartPointer&lt;vtkInteractorStyleImage&gt; style = vtkSmartPointer&lt;vtkInteractorStyleImage&gt;::New();
 interactor-&gt;SetInteractorStyle(style);</pre>
<br />
best regards<br />
Jochen
        
<br/><hr align="left" width="300" />
View this message in context: <a href="http://vtk.1045678.n5.nabble.com/VTK-2D-Control-Points-example-tp5714212p5714222.html">Re: VTK 2D Control Points example</a><br/>
Sent from the <a href="http://vtk.1045678.n5.nabble.com/VTK-Users-f1224199.html">VTK - Users mailing list archive</a> at Nabble.com.<br/>