[Gmsh] Segmentation fault on extrude

[Anton Gladky]

Thank you, Dr. Ir. Ruth V. Sabariego

it seems, the problem is resolved.
But I think it would be better to add a check against such cases to
prevent crashes.

Anton




On Tue, Nov 15, 2011 at 10:14 PM, Ruth V. Sabariego
<r.sabariego at ulg.ac.be> wrote:
> You should extrude with an angle strictly smaller than Pi.
> Otherwise, there is a problem with indetermination.
> Try:
>
> // foil parameters
> r1 = 2.0;
> d  = 0.1;
> r2 = r1 + d;
>
> // size parameters
> h1 =  4.0;
> h2 = 10.0;
> b = 2*r2*1.1;
>
> // Mesh
> lc = 2*d;
> lv = 5;
>
> p1 = newp; Point(p1) = {r1  , 0, h1+d, lc};
>
> wall[] = Extrude  {0, 0, h2-h1-2*d} { Point{ p1 }; Layers{ lv }; };
>
> wall1[] = Extrude  { {0, 0, 1}, {0, 0, 0},Pi/2 } { Line { wall[1] }; };
> wall2[] = Extrude  { {0, 0, 1}, {0, 0, 0}, Pi/2 } { Line { wall1[0] }; };
>
> wall3[] = Extrude  { {0, 0, 1}, {0, 0, 0},-Pi/2 } { Line { wall[1] }; };
> wall4[] = Extrude  { {0, 0, 1}, {0, 0, 0},-Pi/2 } { Line { wall3[0] }; };
>
>
> Regards,
> Ruth
>
>
>
> --
> Dr. Ir. Ruth V. Sabariego
> University of Liege, Electrical Engineering & Computer Science,
> Applied & Computational Electromagnetics (ACE),
> phone: +32-4-3663737 - fax: +32-4-3662910 - http://ace.montefiore.ulg.ac.be/
>
>
>
> On 15 Nov 2011, at 20:27, Anton Gladky wrote:
>
>> Dear developers,
>>
>> there is a bug on Launchpad bug-tracker [1].
>> The attached script crashes. Seems, the problem is in last lines:
>>
>> //Fails:
>> wall2[] = Extrude  { {0, 0, 1}, {0, 0, 0},-Pi } { Line { wall[1] }; };
>> //Fails:
>> wall3[] = Extrude  { {0, 0, 1}, {0, 0, 0}, Pi } { Line { wall1[0] }; };
>>
>> Could you, please, have a look at this script?
>>
>> Thanks
>> Anton
>>
>> [1] https://bugs.launchpad.net/ubuntu/+source/gmsh/+bug/886607
>> <atm2.geo>_______________________________________________
>> gmsh mailing list
>> gmsh at geuz.org
>> http://www.geuz.org/mailman/listinfo/gmsh
>
>