Try a vtkAssignAttribute filter before the contour filter.<div><br></div><div>vtkAssignAttribute assignFilter = vtkAssignAttribute::New();</div><div>assignFilter-&gt;SetInput(sGrid);</div><div>assignFilter-&gt;Assign( {your scalar array name}, vtkDataSetAttributes::Scalars, vtkAssignAttribute::CELL_DATA);</div>
<div><br></div><div>...</div><div><span class="Apple-style-span" style="font-family: Helvetica, Arial, sans-serif; ">scalarIsoSurface-&gt;SetInputConnection(assginFilter-&gt;GetOutputPort() );</span></div><div><br><br><div class="gmail_quote">
On Fri, Mar 5, 2010 at 6:41 AM, Sebastian Gatzka <span dir="ltr">&lt;<a href="mailto:sebastian.gatzka@stud.tu-darmstadt.de">sebastian.gatzka@stud.tu-darmstadt.de</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">






<div bgcolor="#ffffff" text="#000000">
<font size="-1"><font face="Helvetica, Arial, sans-serif">Hello.<br>
<br>
I really can&#39;t tell why my code is not gernerating the iso-surface.<br>
I have a structured grid (sGrid) filled with scalars.<br>
<br>
I call the contour filter<br>
<br>
            vtkContourFilter *scalarIsoSurface =
vtkContourFilter::New();<br>
            scalarIsoSurface-&gt;SetInput(sGrid);<br>
            scalarIsoSurface-&gt;GenerateValues(0,0.1);<br>
<br>
Compute the normal<br>
<br>
            vtkPolyDataNormals *sGridPolyDataNormal =
vtkPolyDataNormals::New();<br>
           
sGridPolyDataNormal-&gt;SetInput(scalarIsoSurface-&gt;GetOutput());<br>
<br>
Put them into a poly data mapper<br>
<br>
            vtkPolyDataMapper *scalarIsoSurfaceMapper =
vtkPolyDataMapper::New();<br>
           
scalarIsoSurfaceMapper-&gt;SetInput(sGridPolyDataNormal-&gt;GetOutput());<br>
<br>
and into an actor<br>
<br>
            vtkActor *scalarIsoSurfaceActor = vtkActor::New();<br>
            scalarIsoSurfaceActor-&gt;SetMapper(scalarIsoSurfaceMapper);<br>
<br>
which is passed on to the scene<br>
<br>
            ren1-&gt;AddActor(scalarIsoSurfaceActor);<br>
<br>
and NOTHING happens.<br>
<br>
Any ideas what I have missed, or whats wrong?<br>
<br>
Sebastian<br>
</font></font>
</div>

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