<DIV>Hi, </DIV>
<DIV> </DIV>
<DIV>I would like to draw a circle each time and where exactly the user clicks on my displayed image.</DIV>
<DIV> </DIV>
<DIV>I saw examples to draw a sphere:</DIV>
<DIV> </DIV>
<DIV> <STRONG>vtkSphereSource* m_sphere = vtkSphereSource::New();<BR> vtkActor* m_sphereActor = vtkActor::New();<BR> vtkPolyDataMapper* sphereMapper = vtkPolyDataMapper::New();<BR> sphereMapper->SetInput(m_sphere->GetOutput());<BR> m_sphereActor->SetMapper(sphereMapper);<BR> m_Renderer->AddActor( m_sphereActor );<BR></STRONG> </DIV>
<DIV>But is there a way to draw a circle (that is <STRONG>empty disk</STRONG> and in <STRONG>2D</STRONG>) instead of a filled sphere in 3D? Maybe vtkSphereSource added to <STRONG>vtkActor2D</STRONG> could be a way?</DIV>
<DIV> </DIV>
<DIV>I am not familiar with VTK for the moment, so, please, excuse me if this seems obvious....</DIV>
<DIV> </DIV>
<DIV>Isabelle</DIV><p>
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