dolfin team mailing list archive

[Alexander Jarosch <alexanj@xxxxx>]

Hi everybody,

sorry to bring up the subject again but I still have problems with gmsh 
meshes and dolfin-convert.

a really simple geo file is

----------------------
Point(1) = {0,0,0,1};
Point(2) = {1,0,0,1};
Point(3) = {1,1,0,1};
Point(4) = {0,1,0,1};
Point(5) = {0,0,1,1};
Point(6) = {1,0,1,1};
Point(7) = {1,1,1,1};
Point(8) = {0,1,1,1};
Line(1) = {1,2};
Line(2) = {2,3};
Line(3) = {4,3};
Line(4) = {4,1};
Line(5) = {5,6};
Line(6) = {6,7};
Line(7) = {7,8};
Line(8) = {8,5};
Line(9) = {5,1};
Line(10) = {4,8};
Line(11) = {6,2};
Line(12) = {3,7};
Line Loop(13) = {1,-11,-5,9};
Plane Surface(14) = {13};
Line Loop(15) = {11,2,12,-6};
Plane Surface(16) = {15};
Line Loop(17) = {2,-3,4,1};
Plane Surface(18) = {17};
Line Loop(19) = {5,6,7,8};
Plane Surface(20) = {19};
Line Loop(21) = {7,-10,3,12};
Plane Surface(22) = {21};
Line Loop(23) = {10,8,9,-4};
Plane Surface(24) = {23};
Surface Loop(25) = {22,-20,-14,18,-16,24};
Volume(26) = {25};
Physical Volume(27) = {26};
-----------

if I mesh it with
gmsh test.geo -3 -o test.msh

i get this mesh file

-----------------------
$NOD
9
1 0 0 0
2 1 0 0
3 1 1 0
4 0 1 0
5 0 0 1
6 1 0 1
7 1 1 1
8 0 1 1
17 0.5 0.5 0.5
$ENDNOD
$ELM
12
1 4 27 26 4 1 17 2 4
2 4 27 26 4 17 1 2 5
3 4 27 26 4 1 17 4 5
4 4 27 26 4 2 17 3 4
5 4 27 26 4 17 2 3 6
6 4 27 26 4 2 17 5 6
7 4 27 26 4 17 3 4 8
8 4 27 26 4 3 17 6 7
9 4 27 26 4 3 17 7 8
10 4 27 26 4 17 4 5 8
11 4 27 26 4 17 5 6 8
12 4 27 26 4 17 6 7 8
$ENDELM
-------------------

and if I use dolfin-convert to convert it I get

Converting from Gmsh format (.msh, .gmsh) to DOLFIN XML format
Expecting 9 vertices
Found all vertices
Expecting 12 cells
*** Vertex 17 of tetrahedron 1 not previously defined.
*** Make sure to only export the physical mesh from Gmsh.

I am pretty sure I only exported the physical mesh and if i look into 
the mesh vertex 17 was defined...

so whats going wrong in that conversion? Am I missing something in the 
use of gmsh?

thanks for the help

/Alex

--
Alexander H. Jarosch

Jarðvísindastofnun Háskólans
Institute of Earth Sciences, University of Iceland
Náttúrufræðahús, Askja
Building of Natural Sciences, Askja
Sturlugata 7
IS - 101 Reykjavík
Iceland

Tel.: +354 525 4906
http://raunvis.hi.is/~jarosch/