No the comsol file is not open format. You will require COMSOL software to view it. Anyways, I will check the scalar values and then if the problem still persists, i will update you with my work.<br><br>Sanket<br><br><div class="gmail_quote">
On Fri, Oct 30, 2009 at 2:11 PM, Bill Lorensen <span dir="ltr"><<a href="mailto:bill.lorensen@gmail.com">bill.lorensen@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
So, my guess is that there is something wrong in your conversion. Is<br>
the comsol file format an open format? Is there a description? If so,<br>
can you provide the comsol file you are trying to convert?<br>
<font color="#888888"><br>
Bill<br>
</font><div><div></div><div class="h5"><br>
On Fri, Oct 30, 2009 at 1:22 PM, Sanket Jain <<a href="mailto:jainsanket1@gmail.com">jainsanket1@gmail.com</a>> wrote:<br>
> Yes, I generated the isosurface in comsol. It looks smoother than in VTK. I<br>
> have attached an view for the isosurface. It looks similar when I rotate the<br>
> isosurface for different view.<br>
><br>
> Sanket<br>
><br>
> On Fri, Oct 30, 2009 at 12:13 PM, Bill Lorensen <<a href="mailto:bill.lorensen@gmail.com">bill.lorensen@gmail.com</a>><br>
> wrote:<br>
>><br>
>> The file and data seem OK. I looked at it in paraview and I see the<br>
>> same sort of "rough" isosurfaces that you see. Can you generate an<br>
>> isosurface in COMSOL for comparison?<br>
>><br>
>> Bill<br>
>><br>
>> On Fri, Oct 30, 2009 at 12:36 PM, Bill Lorensen <<a href="mailto:bill.lorensen@gmail.com">bill.lorensen@gmail.com</a>><br>
>> wrote:<br>
>> > If the outside of your mesh is a "box", that is all you will see.<br>
>> ><br>
>> > I'll take a look.<br>
>> ><br>
>> > Bill<br>
>> ><br>
>> > On Fri, Oct 30, 2009 at 12:27 PM, Sanket Jain <<a href="mailto:jainsanket1@gmail.com">jainsanket1@gmail.com</a>><br>
>> > wrote:<br>
>> >> When I open the unstructured grid file in paraview, I get a opaque<br>
>> >> border of<br>
>> >> my geometry. When I decrease the opacity, I just see a hollow box. I<br>
>> >> cannot<br>
>> >> see my mesh inside the box. I think there is some problem with the<br>
>> >> file. But<br>
>> >> I compared my file with the format for writing unstructured grid and it<br>
>> >> looks correct to me. Do you mind having a look at the file (attached)?<br>
>> >> I<br>
>> >> know this might be asking for too much help. I really appreciate your<br>
>> >> efforts to help me.<br>
>> >><br>
>> >> Sanket<br>
>> >><br>
>> >> On Fri, Oct 30, 2009 at 11:17 AM, Bill Lorensen<br>
>> >> <<a href="mailto:bill.lorensen@gmail.com">bill.lorensen@gmail.com</a>><br>
>> >> wrote:<br>
>> >>><br>
>> >>> I mean the unstructured grid (the geometry).<br>
>> >>><br>
>> >>> On Fri, Oct 30, 2009 at 12:10 PM, Sanket Jain <<a href="mailto:jainsanket1@gmail.com">jainsanket1@gmail.com</a>><br>
>> >>> wrote:<br>
>> >>> > Ok. I will recheck my matlab program which writes the vtk file and<br>
>> >>> > get<br>
>> >>> > back<br>
>> >>> > to you.<br>
>> >>> ><br>
>> >>> > For Paraview, did you mean only the mesh points without the scalar<br>
>> >>> > values? I<br>
>> >>> > checked the unstructured grid with scalars on them. They look<br>
>> >>> > exactly<br>
>> >>> > the<br>
>> >>> > same as in my VTK code.<br>
>> >>> ><br>
>> >>> > Sanket<br>
>> >>> ><br>
>> >>> > On Fri, Oct 30, 2009 at 7:55 AM, Bill Lorensen<br>
>> >>> > <<a href="mailto:bill.lorensen@gmail.com">bill.lorensen@gmail.com</a>><br>
>> >>> > wrote:<br>
>> >>> >><br>
>> >>> >> Perhaps your scalar values are not associated with the proper<br>
>> >>> >> points?<br>
>> >>> >> Have you looked at the original unstructured grid with paraview?<br>
>> >>> >><br>
>> >>> >> On Thu, Oct 29, 2009 at 10:21 PM, Sanket Jain<br>
>> >>> >> <<a href="mailto:jainsanket1@gmail.com">jainsanket1@gmail.com</a>><br>
>> >>> >> wrote:<br>
>> >>> >> > Yes, I tried for number of isovalues. But all of them have<br>
>> >>> >> > similar<br>
>> >>> >> > characteristics. Is it anything to do with the vtk file being in<br>
>> >>> >> > unstructured grid rather than polygonal data? For the mesh, I<br>
>> >>> >> > imported<br>
>> >>> >> > from<br>
>> >>> >> > COMSOL, I cannot use polygonal data.<br>
>> >>> >> ><br>
>> >>> >> > Sanket Jain<br>
>> >>> >> > On Thu, Oct 29, 2009 at 6:33 PM, Bill Lorensen<br>
>> >>> >> > <<a href="mailto:bill.lorensen@gmail.com">bill.lorensen@gmail.com</a>><br>
>> >>> >> > wrote:<br>
>> >>> >> >><br>
>> >>> >> >> It does look strange. Have you tried changing the isosurface<br>
>> >>> >> >> value?<br>
>> >>> >> >><br>
>> >>> >> >> On Thu, Oct 29, 2009 at 5:44 PM, Sanket Jain<br>
>> >>> >> >> <<a href="mailto:jainsanket1@gmail.com">jainsanket1@gmail.com</a>><br>
>> >>> >> >> wrote:<br>
>> >>> >> >> > I have attached a snapshot of my viewer. The isosurface is<br>
>> >>> >> >> > predicting<br>
>> >>> >> >> > the<br>
>> >>> >> >> > volume activated during monopolar stimulation. So,<br>
>> >>> >> >> > theoretically<br>
>> >>> >> >> > you<br>
>> >>> >> >> > will<br>
>> >>> >> >> > expect a sphere at a particular iso value.<br>
>> >>> >> >> ><br>
>> >>> >> >> > I tried using vtkPolyDataNormals. The figure attached is the<br>
>> >>> >> >> > output<br>
>> >>> >> >> > after<br>
>> >>> >> >> > including this filter. But I still think this is not smooth.<br>
>> >>> >> >> ><br>
>> >>> >> >> > I verified by opening my vtk file in Paraview (with, Compute<br>
>> >>> >> >> > Normal<br>
>> >>> >> >> > ON).<br>
>> >>> >> >> > Even then i get the same kind of response. So, do you think<br>
>> >>> >> >> > this<br>
>> >>> >> >> > is<br>
>> >>> >> >> > the<br>
>> >>> >> >> > best<br>
>> >>> >> >> > i can get? Or there might be some problem in the vtk file<br>
>> >>> >> >> > which is<br>
>> >>> >> >> > exported<br>
>> >>> >> >> > from COMSOL (I verified it multiple times).<br>
>> >>> >> >> ><br>
>> >>> >> >> > Thank you,<br>
>> >>> >> >> ><br>
>> >>> >> >> > Sanket<br>
>> >>> >> >> ><br>
>> >>> >> >> > On Thu, Oct 29, 2009 at 4:01 PM, Bill Lorensen<br>
>> >>> >> >> > <<a href="mailto:bill.lorensen@gmail.com">bill.lorensen@gmail.com</a>><br>
>> >>> >> >> > wrote:<br>
>> >>> >> >> >><br>
>> >>> >> >> >> Sorry, reading your e-mail in more detail. Are you generating<br>
>> >>> >> >> >> the<br>
>> >>> >> >> >> isosurfaces in vtk using vtkContourFIiter or some equivalent.<br>
>> >>> >> >> >> If<br>
>> >>> >> >> >> so,<br>
>> >>> >> >> >> you should run the output through vtkPolyDataNormals.<br>
>> >>> >> >> >><br>
>> >>> >> >> >> On Thu, Oct 29, 2009 at 4:59 PM, Bill Lorensen<br>
>> >>> >> >> >> <<a href="mailto:bill.lorensen@gmail.com">bill.lorensen@gmail.com</a>><br>
>> >>> >> >> >> wrote:<br>
>> >>> >> >> >> > What do you mean by rough? Perhaps the faces are flat<br>
>> >>> >> >> >> > shaded?<br>
>> >>> >> >> >> > How<br>
>> >>> >> >> >> > are<br>
>> >>> >> >> >> > you displaying the model in vtk?<br>
>> >>> >> >> >> ><br>
>> >>> >> >> >> > Are your isosurfaces composed of only triangles? If so, did<br>
>> >>> >> >> >> > you<br>
>> >>> >> >> >> > provide surface normals at each point?<br>
>> >>> >> >> >> ><br>
>> >>> >> >> >> > On Thu, Oct 29, 2009 at 4:30 PM, Sanket Jain<br>
>> >>> >> >> >> > <<a href="mailto:jainsanket1@gmail.com">jainsanket1@gmail.com</a>><br>
>> >>> >> >> >> > wrote:<br>
>> >>> >> >> >> >> Hello Experts,<br>
>> >>> >> >> >> >><br>
>> >>> >> >> >> >> I have just started to use VTK to fulfill my visualization<br>
>> >>> >> >> >> >> needs.<br>
>> >>> >> >> >> >> I<br>
>> >>> >> >> >> >> am<br>
>> >>> >> >> >> >> trying out few fundamental steps which would be crucial<br>
>> >>> >> >> >> >> for my<br>
>> >>> >> >> >> >> future<br>
>> >>> >> >> >> >> development.<br>
>> >>> >> >> >> >><br>
>> >>> >> >> >> >> I exported an Finite Element Model (FEM) from COMSOL and<br>
>> >>> >> >> >> >> wrote<br>
>> >>> >> >> >> >> it<br>
>> >>> >> >> >> >> as<br>
>> >>> >> >> >> >> vtk<br>
>> >>> >> >> >> >> unstructured grid in matlab (points, connections and<br>
>> >>> >> >> >> >> data). I<br>
>> >>> >> >> >> >> am<br>
>> >>> >> >> >> >> just<br>
>> >>> >> >> >> >> trying<br>
>> >>> >> >> >> >> to read my vtk file and trying to visualize the<br>
>> >>> >> >> >> >> isosurfaces at<br>
>> >>> >> >> >> >> some<br>
>> >>> >> >> >> >> value.<br>
>> >>> >> >> >> >><br>
>> >>> >> >> >> >> The problem is the isosurfaces are very rough even when I<br>
>> >>> >> >> >> >> increased<br>
>> >>> >> >> >> >> the<br>
>> >>> >> >> >> >> mesh<br>
>> >>> >> >> >> >> density in my COMSOL model. I tried to perform the same<br>
>> >>> >> >> >> >> task<br>
>> >>> >> >> >> >> in<br>
>> >>> >> >> >> >> paraview and<br>
>> >>> >> >> >> >> even there i saw the same problem.<br>
>> >>> >> >> >> >><br>
>> >>> >> >> >> >> Do you think that increasing the mesh density should solve<br>
>> >>> >> >> >> >> it?<br>
>> >>> >> >> >> >> I<br>
>> >>> >> >> >> >> cannot<br>
>> >>> >> >> >> >> increase the mesh density because of computational issues.<br>
>> >>> >> >> >> >> Any<br>
>> >>> >> >> >> >> ideas<br>
>> >>> >> >> >> >> on<br>
>> >>> >> >> >> >> this<br>
>> >>> >> >> >> >> problem will be appreciated.<br>
>> >>> >> >> >> >><br>
>> >>> >> >> >> >> Thank you,<br>
>> >>> >> >> >> >><br>
>> >>> >> >> >> >> Sanket Jain<br>
>> >>> >> >> >> >><br>
>> >>> >> >> >> >> _______________________________________________<br>
>> >>> >> >> >> >> Powered by <a href="http://www.kitware.com" target="_blank">www.kitware.com</a><br>
>> >>> >> >> >> >><br>
>> >>> >> >> >> >> Visit other Kitware open-source projects at<br>
>> >>> >> >> >> >> <a href="http://www.kitware.com/opensource/opensource.html" target="_blank">http://www.kitware.com/opensource/opensource.html</a><br>
>> >>> >> >> >> >><br>
>> >>> >> >> >> >> Please keep messages on-topic and check the VTK FAQ at:<br>
>> >>> >> >> >> >> <a href="http://www.vtk.org/Wiki/VTK_FAQ" target="_blank">http://www.vtk.org/Wiki/VTK_FAQ</a><br>
>> >>> >> >> >> >><br>
>> >>> >> >> >> >> Follow this link to subscribe/unsubscribe:<br>
>> >>> >> >> >> >> <a href="http://www.vtk.org/mailman/listinfo/vtkusers" target="_blank">http://www.vtk.org/mailman/listinfo/vtkusers</a><br>
>> >>> >> >> >> >><br>
>> >>> >> >> >> >><br>
>> >>> >> >> >> ><br>
>> >>> >> >> ><br>
>> >>> >> >> ><br>
>> >>> >> >> ><br>
>> >>> >> >> > --<br>
>> >>> >> >> > Sanket Jain<br>
>> >>> >> >> ><br>
>> >>> >> ><br>
>> >>> >> ><br>
>> >>> >> ><br>
>> >>> >> > --<br>
>> >>> >> > Sanket Jain<br>
>> >>> >> ><br>
>> >>> ><br>
>> >>> ><br>
>> >>> ><br>
>> >>> > --<br>
>> >>> > Sanket Jain<br>
>> >>> ><br>
>> >><br>
>> >><br>
>> >><br>
>> >> --<br>
>> >> Sanket Jain<br>
>> >><br>
>> ><br>
><br>
><br>
><br>
> --<br>
> Sanket Jain<br>
><br>
</div></div></blockquote></div><br><br clear="all"><br>-- <br>Sanket Jain<br>