<div dir="ltr"><div class="gmail_default" style="font-family:arial,helvetica,sans-serif">i don&#39;t see that you added cells to the polydata, just points.  you need a cell array of type vtk_vertex.</div></div><div class="gmail_extra">
<br><br><div class="gmail_quote">On Tue, Aug 6, 2013 at 4:44 PM, Renil <span dir="ltr">&lt;<a href="mailto:renilac@gmail.com" target="_blank">renilac@gmail.com</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hi Jeff Lee,<br>
<br>
I tried following your suggestion, and used the example from the<br>
wiki/examples, /deleteCells/.<br>
I used a polydata to hold the points and changed the lines to spheres and<br>
tried to remove the cells associated to one of the points.<br>
It doesn&#39;t seem to be doing anything.<br>
<br>
I&#39;m probably not delete any cells, right?<br>
<br>
*Code* below:<br>
<br>
int main(int, char *[])<br>
{<br>
        vtkSmartPointer&lt;vtkPoints&gt; points = vtkSmartPointer&lt;vtkPoints&gt;::New();<br>
        points-&gt;InsertNextPoint(0,0,0);<br>
        points-&gt;InsertNextPoint(1,0,0);<br>
        points-&gt;InsertNextPoint(1,1,0);<br>
        points-&gt;InsertNextPoint(0,1,0);<br>
<br>
        // vtkSmartPointer&lt;vtkCellArray&gt; lines =<br>
vtkSmartPointer&lt;vtkCellArray&gt;::New();<br>
        // lines-&gt;InsertNextCell(points-&gt;GetNumberOfPoints());<br>
<br>
        vtkSmartPointer&lt;vtkPolyData&gt; polydata =<br>
vtkSmartPointer&lt;vtkPolyData&gt;::New();<br>
        polydata-&gt;SetPoints(points);<br>
<br>
        vtkSmartPointer&lt;vtkSphereSource&gt; sphereSource =<br>
vtkSmartPointer&lt;vtkSphereSource&gt;::New();<br>
        sphereSource-&gt;SetThetaResolution(20);<br>
        sphereSource-&gt;SetPhiResolution(20);<br>
        sphereSource-&gt;SetRadius(0.5);<br>
<br>
        vtkSmartPointer&lt;vtkGlyph3D&gt; atomGlyphs =<br>
vtkSmartPointer&lt;vtkGlyph3D&gt;::New();<br>
        atomGlyphs -&gt;SetInput(polydata);<br>
        atomGlyphs -&gt;SetSource(sphereSource-&gt;GetOutput());<br>
<br>
        // Create the mapper &amp; actor for the atoms<br>
        vtkSmartPointer&lt;vtkPolyDataMapper&gt; atomMapper =<br>
vtkSmartPointer&lt;vtkPolyDataMapper&gt;::New();<br>
        atomMapper-&gt;SetInput(atomGlyphs-&gt;GetOutput());<br>
<br>
        vtkSmartPointer&lt;vtkActor&gt; sphereActor = vtkSmartPointer&lt;vtkActor&gt;::New();<br>
        sphereActor-&gt;SetMapper(atomMapper);<br>
        sphereActor-&gt;GetProperty()-&gt;SetColor(0.7, 0.7, 0.7);<br>
<br>
        // Tell the polydata to build &#39;upward&#39; links from points to cells.<br>
        polydata-&gt;BuildLinks();<br>
        vtkSmartPointer&lt;vtkIdList&gt; cellIds = vtkSmartPointer&lt;vtkIdList&gt;::New();<br>
        polydata-&gt;GetPointCells(1, cellIds);<br>
<br>
        // Mark a cell as deleted.<br>
        for (int i = 0; cellIds-&gt;GetNumberOfIds();i++){<br>
                polydata-&gt;DeleteCell(i);<br>
        }<br>
<br>
        // Remove the marked cell.<br>
        polydata-&gt;RemoveDeletedCells();<br>
<br>
        vtkSmartPointer&lt;vtkRenderer&gt; renderer =<br>
vtkSmartPointer&lt;vtkRenderer&gt;::New();<br>
        renderer-&gt;AddActor(sphereActor);<br>
        vtkSmartPointer&lt;vtkRenderWindow&gt; renderWindow =<br>
vtkSmartPointer&lt;vtkRenderWindow&gt;::New();<br>
        renderWindow-&gt;AddRenderer(renderer);<br>
        vtkSmartPointer&lt;vtkRenderWindowInteractor&gt; renderWindowInteractor =<br>
vtkSmartPointer&lt;vtkRenderWindowInteractor&gt;::New();<br>
        renderWindowInteractor-&gt;SetRenderWindow(renderWindow);<br>
        renderWindow-&gt;Render();<br>
        renderWindowInteractor-&gt;Start();<br>
<br>
        return EXIT_SUCCESS;<br>
}<br>
<br>
<br>
<br>
<br>
--<br>
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</blockquote></div><br></div>