Not sure. Perhaps actor-&gt;update?<span></span><br><br>On Tuesday, August 6, 2013, Renil  wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Thank you for the input.<br>

<br>
I saw the examples, and before the sphereSource initialization I added:<br>
<br>
        vtkSmartPointer&lt;vtkVertex&gt; sphere1 =<br>
vtkSmartPointer&lt;vtkVertex&gt;::New();<br>
        sphere1-&gt;GetPointIds()-&gt;SetId(0, 0);<br>
        vtkSmartPointer&lt;vtkVertex&gt; sphere2 = vtkSmartPointer&lt;vtkVertex&gt;::New();<br>
        sphere2-&gt;GetPointIds()-&gt;SetId(1, 1);<br>
        vtkSmartPointer&lt;vtkVertex&gt; sphere3 = vtkSmartPointer&lt;vtkVertex&gt;::New();<br>
        sphere3-&gt;GetPointIds()-&gt;SetId(2, 2);<br>
        vtkSmartPointer&lt;vtkVertex&gt; sphere4 = vtkSmartPointer&lt;vtkVertex&gt;::New();<br>
        sphere4-&gt;GetPointIds()-&gt;SetId(3, 3);<br>
<br>
        vtkSmartPointer&lt;vtkCellArray&gt; spheresArray =<br>
vtkSmartPointer&lt;vtkCellArray&gt;::New();<br>
        spheresArray-&gt;InsertNextCell(sphere1);<br>
        spheresArray-&gt;InsertNextCell(sphere2);<br>
        spheresArray-&gt;InsertNextCell(sphere3);<br>
        spheresArray-&gt;InsertNextCell(sphere4);<br>
<br>
        vtkSmartPointer&lt;vtkPolyData&gt; polydata =<br>
vtkSmartPointer&lt;vtkPolyData&gt;::New();<br>
        polydata-&gt;SetPoints(points);<br>
        polydata-&gt;SetVerts(spheresArray);<br>
<br>
Is the sphereSource not letting me delete the cells?<br>
<br>
<br>
<br>
--<br>
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</blockquote>