[petsc-users] DMPlex: Mapping cells before and after partitioning

[Bisht, Gautam via petsc-users]

Hi All,

Here is the situation that I’m running into and am hoping you could provide 
some guidance. I created a mesh using DMPlexCreateBoxMesh() in which cells are 
ordered such that cells with increasing x coordinates are first, followed by 
cells with increasing y-corodinate and so forth. Next, I call 
DMPlexDistribute() that rearranges the cells after partitioning. How can I map 
cells after partitioning to cells before partitioning? 

Thanks,
-Gautam