3. Advice for using GIBI for Aster

• Do not forget that each order ends with a « ; »,

• Code_Aster knows how to reread files created by GIBI with level 3, 4, 5, 6, 8, 9, 10, 11 or 13. This level is linked to the format change,

• think that it is not possible to impose the passage of the mesh through a point or a line that is not on the outer contour. Plan the division of the geometry accordingly,

think that GIBI orients the different meshes with its own conventions. Elements can thus be « returned » (resulting in negative Jacobians and reverse pressures!). In GIBI, the user has the INVERSE and ORIENTER operators to change the orientation of elements. We will advantageously refer to the command MODI_MAILLAGE ([:external:ref:`U4.23.04 <U4.23.04>`], keywords ORIE_PEAU_2D /3D) to intervene on the orientation of the cells in*Aster,

• the operator PRE_GIBI assumes that GIBI was done without error, that is, the second line of the.mgib file is « NIVEAU NIVEAU ERREUR 0 DIMENSION… »

In the opposite case, the interface is still performed by emitting an alarm,

• the file containing the GIBI mesh must be produced by the « SAUVER FORMAT mesh » command; this is the only format read by the PRE_GIBI interface.