[visit-users] [Fwd: VTK to Upgrade ?]

Brad Whitlock whitlock2 at llnl.gov
Mon Mar 29 15:03:13 EDT 2010


Hello Patrick,
    The issue here is that VisIt splits up 
polygonal faces into triangles when plotting the 
exterior faces of a mesh. The Mesh plot is not 
aware of this split and draws the created edges 
where the hexagonal face was split. This should 
only affect the Mesh plot. I will discuss 
possible fixes with the other VisIt developers.

Brad

>Hello,
>
>one year ago, I sent a message concerning 
>polyhedrons misrepresented with Visit.
>Some changes occured with Visit 1.12 and Visit 
>2.0 (lateral faces and volumes are now ok) but 
>some problems still  remains
>Indeed, upper and downer faces of hexagonal 
>prisms are always cut in triangles (see 
>visit0000.tif).
>(whereas representation is correct with paraview (see paraview.png)).
>Could you please resolve this problem ?
>
>yours,
>
>
>Patrick
>
>
>Attachment converted: Macintosh HD:visit0000 9.tif (xxxx/«IC») (0376817A)
>Attachment converted: Macintosh HD:paraview.png (PNGf/«IC») (0376817B)
># vtk DataFile Version 3.0
>vtk output
>ASCII
>DATASET UNSTRUCTURED_GRID
>FIELD FieldData 1
>avtOriginalBounds 1 6 double
>-0.292544 0.292544 -0.318351 0.318351 0 3.5
>POINTS 12 float
>-0.023094 -0.04 0 0.023094 -0.04 0 0.046188 0 0
>0.023094 0.04 0 -0.023094 0.04 0 -0.046188 5.65621e-18 0
>-0.023094 -0.04 0.233333 0.023094 -0.04 0.233333 0.046188 0 0.233333
>0.023094 0.04 0.233333 -0.023094 0.04 0.233333 -0.046188 5.65621e-18 0.233333
>
>CELLS 1 13
>12 0 1 2 3 4 5 6 7 8 9 10 11
>
>CELL_TYPES 1
>16
>
>CELL_DATA 1
>FIELD FieldData 1
>avtOriginalCellNumbers 2 1 unsigned_int
>0 0
>POINT_DATA 12
>
>Date: Wed, 22 Apr 2009 11:36:06 +0200
>From: quemere_patrick <patrick.quemere at cea.fr>
>Subject: VTK  to Upgrade ?
>In-reply-to: <C5FA876D.A2B%william.miner at enig.com>
>To: VisIt software users community <visit-users at email.ornl.gov>
>Message-id: <49EEE506.5090805 at cea.fr>
>MIME-version: 1.0
>Content-type: multipart/mixed; boundary="Boundary_(ID_IWjSMCm2ITWxgQGtZgLyKQ)"
>User-Agent: Thunderbird 1.5.0.12 (X11/20070606)
>References: <C5FA876D.A2B%william.miner at enig.com>
>
>Hello,
>
>I have defined some elements of type : VTK_HEXAGONAL_PRISM (see joined file)
>Whereas this VTK file used with Paraview 3.4.0 
>returns correct vizualisation, Visit 1.9.1 and 
>1.11.1 have a misbehaviour (wrong volume 
>representation)
>Could you please solve this problem ?
>(need to upgrade VTK for the next version of Visit ???)
>
>Thanks
>
>Patrick Quemere
>
>
># vtk DataFile Version 3.0
>vtk output
>ASCII
>DATASET UNSTRUCTURED_GRID
>FIELD FieldData 1
>avtOriginalBounds 1 6 double
>-0.292544 0.292544 -0.318351 0.318351 0 3.5
>POINTS 12 float
>-0.023094 -0.04 0 0.023094 -0.04 0 0.046188 0 0
>0.023094 0.04 0 -0.023094 0.04 0 -0.046188 5.65621e-18 0
>-0.023094 -0.04 0.233333 0.023094 -0.04 0.233333 0.046188 0 0.233333
>0.023094 0.04 0.233333 -0.023094 0.04 0.233333 -0.046188 5.65621e-18 0.233333
>
>CELLS 1 13
>12 0 1 2 3 4 5 6 7 8 9 10 11
>
>CELL_TYPES 1
>16
>
>CELL_DATA 1
>FIELD FieldData 1
>avtOriginalCellNumbers 2 1 unsigned_int
>0 0
>POINT_DATA 12
>
>--
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-- 
======================================================================
Brad Whitlock                   Lawrence Livermore National Laboratory
whitlock2 at llnl.gov
(925)424-2614
======================================================================


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