Re: [Getfem-users] Level set / cut mesh

[Renard Yves]

Dear Roland,

Very briefly, the structure mesh_level_set contains all the data  
concerning how the mesh is cut by the level-set.
There is no extensive documentation on it but you can have a look on  
the source files
getfem_mesh_level_set.h and getfem_mesh_level_set.cc

In particular

mls.is_convex_cut(i) says if element i is cut or not by the level-set.

mls.mesh_of_convex(i) gives the sub-mesh of an element cut by the level-set.

and

mls.primary_zone_of_convex(i) gives some information about where is  
the element with respect to the level-sets.


The option INTEGRATE_OUTSIDE of the mesh_im_level_set object gives a  
standard integration method for the element uncut
by the level-set(s) and build a specific integration method for each  
element cut by the level-set(s) based on the sub mesh given by the  
mesh_level_set object.


Yves.



Roland Stoffel <address@hidden> a écrit :

> Hello,
>
> i like to solve the linear elasticity as well as the eikonal equation on
> a level set framework.
> For this it will be helpfull if i can get explicit access to the
> convexes (and with this to the matching unknowns) where p(x) > 0 rsp.
> p(x) < 0 and the boundary p(x) = 0, especially  the coordinates where
> p(x) = 0.
> How does getfem cut the mesh and how can i get the cut parts?
> How does the options INTEGRATE_OUTSIDE etc. work?
>
> Many thanks
> Roland
>
> --
> --------------------------------------------------------------------
> Roland Stoffel       + Phone: +49 651/201 - 3463
> Universität Trier    +
> FB IV Mathematik     + www:   www.mathematik.uni-trier.de/~stoffel
> 54286 Trier          + Email: address@hidden
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