Add searchable spheroid

This is an idea that I discussed offline with @Mattijs. Having spheroid as a shape could be useful for external surroundings etc. Found some ideas, but equally importantly I have someone willing to implement it (@victorOle). The first efforts look good, but would likely make most sense to merge into searchableSphere and treat the uniform radii as a special optimized case.

Largely able to work from Geometric Tools documentation (CC-BY 4.0), but needs rework for the OpenFOAM framework

I am the one looking at the implementation. Will have code available reasonably soon.

changed the description

@pratap

Changes based on local develop repo.

searchableSphere1.H searchableSphere1.C

• generally looks good, line intersection isn't working.

Trivial (cut/paste error) - was setting 'near' in both branches instead 'far'.

mentioned in commit 043419f3

mentioned in commit e9d130f0

mentioned in commit 4258f805

closed