GiD forum

Hi there !


I am currently testing GiD and I am having two problems to submit.

1. I am trying to perform triangle-meshing of NURBS surfaces. Most of
the time, the mesher doesn't have any difficulties doing its job but for
some particular NURBS surface, it fails, no matter which meshing
parameters I entered. I located the offending NURBS surface and saved it
under a GiD directory named 'PbMesh1.gid'. The directory only contained
1 file 'PbMesh1.geo', which is attached with this mail. Could you tell
me what's wrong with this surface ? It's a cylinder-shaped NURBS
surface. The only (time-consuming) solution I found was to divide this
surface into two symmetric parts, using a line entity. Is there a
simpler and/or automatic way to 'repair' this kind of surfaces ? Is it
an erroneous CAD surface ? Help !!
I am using GiD on a Windows NT 4.0 platform and it just crashes when the
only surface to mesh is the one given in PbMesh1...

2. I am also using GiD on a Silicon Graphics platform (IRIX, bi-proc).
It works fine, except I have to wait more than two minutes two import an
IGES file that loads in no more than 5 seconds under my desktop PC
(WinNT,128Mb,466Mhz). It seemed to me there was no other big job running
on the Silicon workstation. Is it normal ?

Thanks in advance for your help !

G.

--

Gilles LACROIX | mailto: lacroix at bertin.fr
Bertin Technologies - BP 284 |
10, avenue Ampere - Montigny-le-Bretonneux | Tel: +33 (0)1 39 30 62 66
78053 Saint Quentin en Yvelines Cedex |
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Hello,

GiD version 6.0b1. is already in the GiD web page. This is a pre-release
version that has most of the functionality that final version 6 will have. It
only needs a lot of fine tuning and bug fixing. I ask from here to everybody
that can help us, to download this version and to communicate us every found
bug. This will help a lot to obtain a well tested version 6.

On Fri, 16 Jun 2000, you wrote:

1. I am trying to perform triangle-meshing of NURBS surfaces. Most of
the time, the mesher doesn't have any difficulties doing its job but for
some particular NURBS surface, it fails, no matter which meshing
parameters I entered. I located the offending NURBS surface and saved it
under a GiD directory named 'PbMesh1.gid'. The directory only contained
1 file 'PbMesh1.geo', which is attached with this mail. Could you tell
me what's wrong with this surface ? It's a cylinder-shaped NURBS
surface. The only (time-consuming) solution I found was to divide this
surface into two symmetric parts, using a line entity. Is there a
simpler and/or automatic way to 'repair' this kind of surfaces ? Is it
an erroneous CAD surface ? Help !!
I am using GiD on a Windows NT 4.0 platform and it just crashes when the
only surface to mesh is the one given in PbMesh1...


That is a problem in GiD with some closed surfaces. We have fixed it in our
development version. Next beta version will deal correctly with it. Probably,
current beta version would not have created this problem.

The easier way to fix it in old GiDs is to use
Geometry-Edit-Divide-Surface-Numdivisions-2 (in u or v)

2. I am also using GiD on a Silicon Graphics platform (IRIX, bi-proc).
It works fine, except I have to wait more than two minutes two import an
IGES file that loads in no more than 5 seconds under my desktop PC
(WinNT,128Mb,466Mhz). It seemed to me there was no other big job running
on the Silicon workstation. Is it normal ?


Are both versions the same? (Check Help-About)

Best regards,

--
Centre Internacional de Mètodes Dr. Ramon Ribó
Numèrics en Enginyeria
ramsan at cimne.upc.es
C/ Gran Capitan s/n,
Modulo C1, Campus Norte UPC, tel. +34 93 401 74 03
E-08034 Barcelona, Spain fax. +34 93 401 65 17