[Gmsh] the piston exsample

[wing]

Jean-François Remacle wrote:
> wing a écrit :
>> Hi all,
>>
>> I just compiled 2.2.4 with opencascade support and now I can import 
>> .stp geometries. Then I tried a 'piston' example, the attached 
>> (piston.jpg, piston.msh) is the result I got. But I noticed that it's 
>> very different from the example in the gmsh home page 
>> (http://geuz.org/gmsh/gallery/piston.png). Seems that my output is 
>> too rough (the mesh elements are too big). What am I doing wrong? How 
>> to get a more nice result like what is in the gmsh homepage?
>
> You should define an appropriate size field.
> Try for example
>
> gmsh -clscale .2 piston.brep
>
> JFR
>
>>
>> ------------------------------------------------------------------------
>>
>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> gmsh mailing list
>> gmsh at geuz.org
>> http://www.geuz.org/mailman/listinfo/gmsh
>>   
>
>
Hi JFR,

Thanks for help, it works.
I found that it also can be done in the GUI (Tools -> Option -> Mesh -> 
General -> Element Size Factor). I think it's a good idea to  generate a 
'trial' mesh with the default Element Size Factor = 1.00, and then 
regulate it to a proper number based on the 'trial' result. Hope this 
helps the other who are not so good at command line and prefer GUI (if 
there is anyone).

Regards,
wing