[Gmsh] handling stp file (example attached)

[Christophe Geuzaine]

Hi,

"Coherence" only applies to native .geo models. Geometry.OCCSewFaces seems to repair your open cascade model:

=====
Mesh.CharacteristicLengthFactor=0.25;
Mesh.Algorithm=1; // 2D mesh algorithm  (1) MeshAdapt (default)(5) Delaunay (6) Frontal
Mesh.ElementOrder=1; // 1=linear elements, N (<6) = elements of higher order
Geometry.OCCSewFaces = 1;

Merge "Volume1.STEP";
=====



On 16 Feb 2012, at 23:54, Sangpil Yoon wrote:

> Dear Gmsh experts;
> 
> 
> previous post was a kind of general question....
> 
> here i attached a .STEP and .geo file 
> 
> i did the following in command line
> 
> 
> > gmsh test.geo -2 -format msh -o test.msh
> 
> 
> the geometry is pretty simple; a cylinder shape on one side of a box.
> 
> you will see duplicate nodes are there.....because there ARE duplicate lines and points.
> 
> did I do something wrong in using .geo file?
> 
> Or, do i need to do something before exporting .STEP file?
> 
> 
> any comments are welcome.
> 
> 
> NOTE: If i do the same thing in the following manner, no duplicate nodes are found. 
> 
> 1. read .STEP file
> 2. save it as .geo file
> 3. add one line 'Coherence' at the end of .geo file
> 4. do mesh 
> 
> i strongly believe I am not properly using .geo file or command.....  
>  
> <test.zip>_______________________________________________
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-- 
Prof. Christophe Geuzaine
University of Liege, Electrical Engineering and Computer Science 
http://www.montefiore.ulg.ac.be/~geuzaine