Determine location of a degree of freedom

[Sean Johnson]

Is there a way to findout the "coordinates" of a degree of freedom? I want to strongly enforce all degrees of freedom on a boundary be 0 in a DG dof_handler. I know this is not normal for DG. It is done to avoid an edge that otherwise contains a singularity. However, the degrees of freedom are not logically on the boundary and as far as I understand they aren't even on the face of their respective cells but the interior. I can determine the cells that contain degrees of freedom that are physically on this outer boundary but not "logically" there within Deal.II. I just need to be able to differentiate between the other degrees of freedom within the cell now so that I can set the constraints.

Thanks for any time spent answering this,

Sean Johnson

[Lucas Myers]

Hi Sean,

Is this what you're looking for?

https://github.com/dealii/dealii/wiki/Frequently-Asked-Questions#how-to-get-the-mapped-position-of-support-points-of-my-element

- Lucas

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[Sean Johnson]

I'm so sorry that it was in the FAQ.

Thanks for the fast response. I will try this immediately. Thanks again

[Lucas Myers]

Hey no worries, I have also been caught posting questions that were in the FAQ.

- Lucas

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