Hello, I have a question concerning local higher-order interpolation (more precisely, patch-wise bi-quadratic interpolation).
I start from a solution on a "fine" mesh Omega_h, with a bilinear discrete solution u_h defined on it. I coarsen all cells in that mesh once to get Omega_2h. I then have to build from the data on Omega_h a bi-quadratic discrete solution u_2h. Is there API support for getting u_2h in deal.ii? I guess I can take every active cell on Omega_2h and get the support point values from Omega_h that lie in that (bigger) cell, and then build the bi-quadratic solution by hand. Due to Omega_2h being obtained directly from Omega_h by pure coarsening, I should have enough point values for a bi-quadratic interpolation. Is there a cleaner way to accomplish this? -- Thanks!
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