[MOAB-dev] Order of entities returned by iMesh_getEntAdj

[Iulian Grindeanu]

----- Original Message -----

| Hey Moab-Dev,

| Are the adjacent entities returned by iMesh_getEntAdj in any sort of
| order?

Hi, 
from the code, it looks like we are not preserving the order, we are ordering the adjacent entities by their handles (and eliminating the duplicates) 
I am not seeing an easy solution if you need a particular order. 
Maybe Tim has some suggestions. One solution would be to implement side number method in iMesh; 
Or to look at connectivity array and figure out from there the order. I am not sure which one would be easier to do or be more efficient. 

Iulian 

| For example, consider a mesh of quadrilaterals. Get the edges
| adjacent
| to a given face. If the edges are numbered according the convention
| defined by MOAB
| (http://www.mcs.anl.gov/uploads/cels/papers/P1573A.pdf) I would get
| the array (0,1,2,3) or some shifted version of this. Will
| iMesh_getEntAdj return (0,1,2,3) (or a shifted/flipped version of
| it),
| or could I get something like (1,3,2,0) back (where the edges are not
| ordered with respect to a CW or CCW traverse around the face)?

| Thanks,
| -Chris Eldred

| --
| Chris Eldred
| DOE Computational Science Graduate Fellow
| Graduate Student, Atmospheric Science, Colorado State University
| B.S. Applied Computational Physics, Carnegie Mellon University, 2009
| chris.eldred at gmail.com / celdred at atmos.colostate.edu
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