[vtkusers] vtkDataSetSurfaceFilter 1.30 - 1.35 : undesired sideeffects with 2-d cells on 3-d faces

[John Platt]

Hi Users,

 

I have subsequently noticed that the quads did not use the same point
id's as the hexes but different point id's with identical coordinates.
Sorry for any inconvenience - I will park this problem for the moment.

 

John.

 

-----Original Message-----
From: vtkusers-bounces at vtk.org [mailto:vtkusers-bounces at vtk.org] On
Behalf Of John Platt
Sent: 25 May 2004 23:19
To: vtkusers at vtk.org
Subject: [vtkusers] vtkDataSetSurfaceFilter 1.30 - 1.35 : undesired
sideeffects with 2-d cells on 3-d faces

 

Hi users,

 

The changes to vtkDataSetSurfaceFilter from 1.30 to 1.35 have had some
undesired side effects with the display of quads attached to hex faces
(quads coincident with faces using the same point id's). In version 1.30
it appears that all the 2-d cells were drawn after the 3-d cells so the
quads were never hidden by the hex's. In version 1.35 this discipline
appears to have changed with some of the 2-d cells shown but others
obscured by the 3-d cells.

 

Does anybody know how I can arrange to draw the faces of all the 3-d
cells first, followed by all the 2-d cells? Should this be the
responsibility of the application developer or VTK?

 

For those who are interested, this is important for checking FE-models
where boundary elements are connected to finite elements or where there
is a transition from 3-d to 2-d elements.

 

Thanks in advance for your comments and suggestions.

 

John.

 

 

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