Adapting Mesh to an Exact Function (06-exact)¶
This technique can be useful in a number of situations, for example when a time-dependent proces starts from a complicated initial condition that would not be represented with sufficient accuracy on a coarse initial mesh.
Assigning an exact function to the fine mesh¶
At the beginning of each adaptivity step, instead of calculating a solution on the fine mesh, we assign the exact function to it:
// Assign the function f() to the fine mesh.
info("Assigning f() to the fine mesh.");
if(ref_sln != NULL) delete ref_sln;
ref_sln = new ExactSolutionCustom(ref_space->get_mesh());
The rest of the adaptivity loop is as usual.
