[petsc-users] coordinate point location in mesh

[Matthew Knepley]

On Fri, Apr 5, 2013 at 6:29 AM, Dharmendar Reddy <dharmareddy84 at gmail.com>wrote:

> Hello,
>          Is there any DMPlex function which will tell me to which DMPlex
> point a given coordinate point  belongs to ?
> I am looking for cell id given a coordinates of a point.
>

I have experimental code to do this, DMPlexLocatePoint(). There are tests,
but they are not that stringent for
hexes. Let me know if this works for you.

   Matt


> If not,  I can think of writing of a test for point in cell
> and loop over cells to find the cell id. Any suggestions for doing this ?
>
>
> The physical problem i am looking at is a Poisson equation in a given
> domain.
>
> - \Delta u(x) = rho(x)  where rho is a sum of delta functions randomly
> located in the domain.
> --
> -----------------------------------------------------
> Dharmendar Reddy Palle
> Graduate Student
> Microelectronics Research center,
> University of Texas at Austin,
> 10100 Burnet Road, Bldg. 160
> MER 2.608F, TX 78758-4445
> e-mail: dharmareddy84 at gmail.com
> Phone: +1-512-350-9082
> United States of America.
> Homepage: https://webspace.utexas.edu/~dpr342
>



-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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