On 3/19/19 9:57 AM, David F wrote:
>
> I am not sure how to answer your question. I'm using a very basic a setup
> equivalent to step-8. Therefore, I have a solution vector with final
> displacements where each entry corresponds to the displacement of a dof. My
> aim is to find the initial position of the vertices in the form of
> std::vector<Point<dim>> and the final position (i.e., the initial position +
> its displacement) in the same form.
I see -- you are using the pre-existing mesh and want to interpret the
solution as the *displacement* to the mesh.
If all you are interested in is to output the solution on the deformed mesh,
you can call Data::build_patches() with the mapping argument, where you use a
MappingQEulerian object initialized with your displacement vector.
If you want to have a representation in the program, you can use the function
in namespace DoFTools that returns a vector of support point locations for
each DoF, and then query your solution vector for the corresponding
displacements. You might have to juggle with the x, y, and z displacements a
bit to get this right, but the infrastructure is all there.
Best
W.
--
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Wolfgang Bangerth email: bange...@colostate.edu
www: http://www.math.colostate.edu/~bangerth/
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