Computation of energies
Actual (local) computations of energies have to be separated (from the current functionals).
It could be the best to have a new module ddg.math.engeries.
This should involve functions working on a set of points and on vectorized input.
Examples are:
planarity_via_distance_of_diagonals(v_1, ..., v_n)circularity_via_angles(v_1, ..., v_n)circularity_via_cr(v_1, ..., v_n)-
isothermicity_via_edge_lables(v_1, ..., v_n)(see ddg.math.nets2d) - ...