The old implementation constructed a GeometryType object and asked
that whether it was a simplex.  Apparently this inlined badly.
The new implementation queries the UG-internal data structures
directly, which leads to a measurable performance gain.

UGGrid has used an overly complicated way to compute the
integrationElement since practically forever.  Instead of computing
the determinant of the Jacobian of the geometry transformation,
it computed the inverse determinant of the inverse Jacobian.
This lead to a matrix inversion being performed at each call
that wasn't actually necessary.

This patch removes this pointless inversion.

The name should really point out that it is about the *inverse*
transformation.

The UGGrid code dates to before constexpr if existed, and uses
particular "pointless" casts to achieve a similar effect.
Replace some of these casts by constexpr if, which is much easier
to read.

The code is simplified further because UGGrid has recently started
to use FieldVector for point coordinates.  Therefore, componentwise
copying is not necessary anymore.

Remove include of itself

See merge request !746

Update versions release 2 10

See merge request !744

[fix] Account for rounding errors on float representing version of gmsh file

See merge request !730

Update LICENSE.md

See merge request !743

Move include of config.h from source to some header files

See merge request !741

Fix bug in DUNE_GRID_EXAMPLE_GRIDS_PATH for downstream projects

See merge request !742

The recent change in dune build system (see 2039882c0a54f126553524c4d02af15df6ba619e in dune-common) showed that this variable is being set incorrectly.

Add capability checks to limit gridcheck to existing entities

See merge request !734

Revert "Merge branch 'fix/dfggridFactoryPythonBindings' into 'master'"

See merge request !740

This reverts merge request !739

Add HasDGFGridFactory Capability to Python bindings capabilities

See merge request !739

Add missing isNone if statement in checkintersectionit.hh

See merge request !735

AlexanderMueller authored 11 months ago and Alexander Müller committed 11 months ago

Co-authored-by: Christian Engwer <christian.engwer@uni-muenster.de>

[bugfix][Python] Make refineStepsForHalf a dynamic property if the grid implements it.

See merge request !738

implements it.

[bugfix][python] Fix geometry.jacobianInverse() in python

See merge request !736

This actually returned the transposed of the inverse
which is a severe bug.

Move ibegin() and iend() from DefaultGridView into GridDefaultImplementation

See merge request !660

[cleanup][Python] Remove unnecessary import of checkconfiguration.

See merge request !733

2.2 is not directly representable as a float and doing comparison with
it gives surprising results on i386. Basically, the 2.2 in the header of
the gmsh files might actually result in a float that is larger than 2.2

Hence we now make sure that the float representing the version is smaller
than 2.20001

[yasp] Remove deprecated YLoadBalance

See merge request !728

Make concepts more restrictive

See merge request !687

[cleanup] Stop using deprecated header keywords.hh

See merge request !729

* Replace macro `DUNE_INLINE_VARIABLE` by `inline`,
  because for the supported compilers it's always defined to this way.
* Stop including deprecated, no longer used header `keywords.hh`.
* Remove conditionally defined anonymous namespace,
  because for the supported compilers the condition always evaluates
  to false.
* Fix indentation after removal of namespace.