From: Wolfgang Bangerth
+ New: The finite element classes have been redesigned from
+ scratch to allow also elements that depend on the actual cell
+ shape, like Raviart-Thomas, BDM or edge elements. Presently, we
+ have implemented continuous and discontinous Lagrange elements,
+ that can be easily extended to higher degree. E.g. for
+ continuous FEs we've already implemented elements up to degree
+ four, for discontinuous FEs up to degree 10.
+
+ Furthermore we have totally reimplemented the mapping
+ between unit and real cell. In future we won't be restricted
+ to Q1 mapping any more, but we will have
+ Qp mappings of arbitrary degree p. Presently
+ implemented are mappings up to degree four in 2d, and degree
+ three in 3d. This allows to approximate curved boundaries not
+ only by straight lines (linear approximation) but also by
+ quadratic, cubic, etc approximation. The finite elements will
+ be able to be combined with arbitrary mappings. So in future we
+ can use subparametric, iso- as well as superparametric
+ elements.
+
+ The new implementation uses a totally new structure of
+ communication between General
+
FEValues
, the
+ FiniteElements
and the Mappings. Despite of this,
+ the new structure will almost not be 'visible' to the user of
+ deal.II as we tried to retain the interface
+ to the user (mainly that of FEValues
) as far as
+ possible.
+
+ (RH & GK 2001/03/13)
+
New: There is now some support to include and use routines from the
.
(Ralf Hartmann 2001/01/22)
New: function contract
for two arguments of
Tensor<1,dim>