[vtkusers] PolyData rendering problem

[Frank Gao]

Hi David,

 

I did a comparison between the nVidia card settings, and found out the
differences with "Performance" and "Quality" preference. Please see the
document below. 

 

https://www.dropbox.com/s/vwdgj44zz6y3w6w/nVIdiaCard_Setting_difference.docx

 

I am assuming there are some OpenGL calls to implement the difference, but
don't really know what to do. Hope this can provide some clues.

Best regards,

Frank

 

From: vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] On Behalf
Of David E DeMarle
Sent: Tuesday, November 12, 2013 4:43 PM
To: Frank.Gao at guidemia.com
Cc: VTK Developers; VTK Users
Subject: Re: [vtkusers] PolyData rendering problem

 

What is the world space size of the triangles? Are they small enough to push
the limits of GL float precision?




David E DeMarle
Kitware, Inc.
R&D Engineer
21 Corporate Drive
Clifton Park, NY 12065-8662
Phone: 518-881-4909

 

On Tue, Nov 12, 2013 at 6:10 PM, Frank Gao <Frank.Gao at guidemia.com
<mailto:Frank.Gao at guidemia.com> > wrote:

 

Hi All,

 

We are having some problems with the surface rendering in VTK. If the users
don't set their graphics card preference to "Quality", the surface rendering
will show a lot of "ghost" lines between the triangles, but they are not the
polydata edges. Completely display artifact. When the triangles are small,
this is much more obvious. I places a picture in the following link. The
left one has problem. The right one is when preference is set to "quality".

 

https://www.dropbox.com/s/1kvpzia57uggist/vtk_polydata_rendering_case.PNG

 

Because of this we have to tell the users to change their graphics card
setting. Is this something we can do in the code? Thanks a lot in advance.

 

Regards,

Frank Gao


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