GitLab

Improve implementation of `SplineSurface`

See merge request uhlmann-group/python-spline-fitting-toolbox!5

The current sampling relies on sampling rates
provisions as samples using latitudes and
longitudes.

Hence, the density of points is relatively dense
at the pole and sparse at the equator.

Moreover, the number of samples points depends
on Ms and Mt.

This adds a scheme to sample quasi-evenly points
on the surface for a provided number of points.

See the maths: https://hackmd.io/@jjerphan/rkEMjlq4d

We don't want to store data for test on the repo directly.

It is a big dependency and it comes with troubles for the CI.

Add mpmath as a dependency for the cosecant
Co-authored-by: Virginie Uhlmann <uhlmann@ebi.ac.uk>

Refactoring proposals

See merge request uhlmann-group/python-spline-fitting-toolbox!3

I tried to make it clearer with some "ASCII art".

This is taken from the tests but needs to be tested.

The implementations originate from d92ff02c.