<br>Ya, I had also done the same mistake... I had ommitted that update statement.. By putting that update statement is should definitley work.. (only if data is fed correctly)<br><blockquote><br>---------- Original message ----------<br>From:David Doria< daviddoria+vtk@gmail.com ><br>Date: 05 Mar 10 19:26:03<br>Subject: Re: [vtkusers] vtkContourFilter not working on vtkStructuredGrid<br>To: Sebastian Gatzka <sebastian.gatzka@stud.tu-darmstadt.de><br><br><div class="gmail_quote">On Fri, Mar 5, 2010 at 8:41 AM, Sebastian Gatzka <span dir="ltr"><<a target=\"_blank\" target="\"_blank\"" href="mailto:sebastian.gatzka@stud.tu-darmstadt.de">sebastian.gatzka@stud.tu-darmstadt.de</a>></span> wrote:<br><font color="#000000"></font><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div bgcolor="#ffffff" text="#000000">
<font color="#000000"><font size="-1"><font face="Helvetica, Arial, sans-serif">Hello.<br>
<br>
I really can'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->SetInput(sGrid);<br>
scalarIsoSurface->GenerateValues(0,0.1);<br>
<br>
Compute the normal<br>
<br>
vtkPolyDataNormals *sGridPolyDataNormal vtkPolyDataNormals::New();<br>
sGridPolyDataNormal->SetInput(scalarIsoSurface->GetOutput());<br>
<br>
Put them into a poly data mapper<br>
<br>
vtkPolyDataMapper *scalarIsoSurfaceMapper vtkPolyDataMapper::New();<br>
scalarIsoSurfaceMapper->SetInput(sGridPolyDataNormal->GetOutput());<br>
<br>
and into an actor<br>
<br>
vtkActor *scalarIsoSurfaceActor = vtkActor::New();<br>
scalarIsoSurfaceActor->SetMapper(scalarIsoSurfaceMapper);<br>
<br>
which is passed on to the scene<br>
<br>
ren1->AddActor(scalarIsoSurfaceActor);<br>
<br>
and NOTHING happens.<br>
<br>
Any ideas what I have missed, or whats wrong?<br>
<br>
Sebastian<br>
</font></font>
</font></div><div bgcolor="#ffffff" text="#000000"><font color="#000000"><font size="-1"><font face="Helvetica, Arial, sans-serif"><br></font></font></font></div><font color="#000000"></font></blockquote><div class="gmail_quote"><br></div><div class="gmail_quote">You probably have a call to Render() after the code you sent us, which I believe updates the whole pipeline. Whenever I have something that is totally empty, I go back and put an Update() call on every object that is updatable.</div>
<div class="gmail_quote"><br></div><div class="gmail_quote"><span class="Apple-style-span" style="font-family: Helvetica,Arial,sans-serif;">scalarIsoSurface->GenerateValues(0,0.1);</span></div><div class="gmail_quote">
<span class="Apple-style-span" style="font-family: Helvetica,Arial,sans-serif;">scalarIsoSurface->Update();</span></div><div class="gmail_quote"><span class="Apple-style-span" style="font-family: Helvetica,Arial,sans-serif;"><br>
</span></div><div class="gmail_quote">before I dig too deep.</div><div class="gmail_quote"><br></div><div class="gmail_quote">If that doesn't change anything, try to create a demo involving some simple data (using a vtk*Source if you can, so we can reproduce it without needing your dataset). Then send us the smallest compilable code that demonstrates the problem.</div>
<br clear="all">Thanks,<br><br><div>David</div></div>
</sebastian.gatzka@stud.tu-darmstadt.de></blockquote>