Lambdas in constexpr are only allowed from C++17. The functions
returned from isValid cannot be used in a constexpr context in C++14.

* isValid can be used to generate a functor that can check whether an operation done with a type is valid
* this patch also provides examples in form of a test and documentation

In case one dimension is very small take the maximum between the to be tested box dimensions
in the corresponding axis direction. There is one corner case left where the epsilon is very small:
If there are two bboxes of lines, both parallel in an axis direction, their collision is only
detected if the coordinates are an exact match. However, we currently do not see any used case
where this might occur.

* Generalize bounding box tree
* Extract intersection algorithms
* Fix some epsilon issues in interval (1d) and triangle (2d) point intersection
* Adapt point sources to new interface
* Adapt fv grid geometry to new interface -> element map moved to basefvgeometry
* Improve bounding box tree test

* use dumux/common/properties.hh instead of dumux/common/propertysystem.hh

Timo Koch authored 7 years ago and Dennis Gläser committed 7 years ago

todo: implemenet tree lookup for the logging tree

Katharina Heck authored 8 years ago and Timo Koch committed 7 years ago

(cherry picked from commit 086170fd)

Fix/restart and episodes

For me it would be more intuitive to first advance the time level and then do all the processing and file writing. However this is more complicated, therefore I shifted the restart stuff to the same level as the vtk output stuff.

See merge request !310

Everything in our .hh files is defined within the namespace `Dumux`.
There were numerous occurrences of `Dumux::` qualifiers that were
unnecessary. Remove those occurrences. Necessary qualifications
remain, such as `typedef Dumux::H2O<Scalar> H2O;`.

this means
* the first vtk (normally the initial solution) is *-00000.vtu
* if all timesteps are writen the time step number and vtk number correspond

Move all testing related scripts to subfolder testing

Add test cases where an intersection
* is on an edge
* goes through a corner
* one-d element is split by face

Add timer for intersection computation.

* Constructs bounding box tree
* Test intersection with points
* If dune-foamgrid available tests for intersection with a network
* Test all above tests for invariance w.r.t. grid coord scaling

Things that could be added in the future:
* Test with unstructured grids
* Test with different grid managers