The deal.II news page

From 7ad0bbd2249e6c0f2dc836b5d9a08e649bd202cf Mon Sep 17 00:00:00 2001 From: hartmann Date: Wed, 26 Sep 2001 12:37:24 +0000 Subject: [PATCH] Rename this file to 3.1.2-vs-3.2.0.html git-svn-id: https://svn.dealii.org/branches/Branch-3-2@5083 0785d39b-7218-0410-832d-ea1e28bc413d --- deal.II/doc/news/2001/c-3-1.html | 1245 ------------------------------ 1 file changed, 1245 deletions(-) delete mode 100644 deal.II/doc/news/2001/c-3-1.html diff --git a/deal.II/doc/news/2001/c-3-1.html b/deal.II/doc/news/2001/c-3-1.html deleted file mode 100644 index d7f37f4485..0000000000 --- a/deal.II/doc/news/2001/c-3-1.html +++ /dev/null @@ -1,1245 +0,0 @@ - - - - - - The deal.II news page - - - - - - -

Changes after Version 3.1

- -This is a quite extensive list of changes made after the release of -deal.II version 3.1. It is subdivided into changes -made to the three sub-libraries base, -lac, and deal.II, as well as -changes to the general infrastructure, -documentation, etc. - - - - -

General

- -

- New: example program step-11. -
- (WB 2001/09/17) -
- -
- New: example program step-10. -
- (WB, RH 2001/09/12) -
- -
- New: the ./configure script now also recognizes - Compaq's cxx compiler. The library now also compiles cleanly - with this compiler. -
- (WB 2001/07/06) -
- -
- Changed: The libraries are no more linked using the C++ - compilation flags, but rather using LDFLAGS. Some compilers - object to compilation flags on the linker line. -
- (WB 2001/05/23) -
- -
- Changed: If in multithreaded mode, the ACE library is now - automatically added to the $(LIBS) Makefile - variable. There is no need anymore for a special clause in your - Makefile. -
- (WB 2001/05/23) -
- -
- New: the ./configure script now also recognizes - the Intel ICC compiler that was released for Linux lately. The - library now also compiles cleanly with this compiler. -
- (WB 2001/05/22) -
- -
- Fixed: the program that generated HTML from the example - programs was broken on some platforms for reasons beyond our - knowledge. This is now fixed. -
- (Roger Young, WB 2001/03/22) -
- -
- Improved: libraries are now all in a subdirectory lib in the - deal.II home directory. It is now easy to - make this directory a link to put the libraries on a faster - disk. -
- (GK 2001/03/14) -
- -
- New Design of FiniteElements - and Mappings - -
- 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. We have implemented - continuous Lagrange elements up to degree four and discontinous - Lagrange elements up to degree 10. They can be easily extended - to higher degree. -
- -
- 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 - Q_p mappings of arbitrary degree p. Presently - implemented are mappings up to degree 10 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 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. -
- -
- Together with this new design comes a reduction of 25000(!) - lines of deal.II code. This elimination - mainly affected code that previously was machine generated - (e.g. by maple). In view of almost unchanged execution times of - applications, the faster compilation and additional - functionality constitutes a significant improvement of - deal.II. Results produced by the new code - match those of the old design up to machine precision. -
- (RH & GK 2001/03/13) -
- -
- New: There is now some support to include and use routines from the - Harwell Subroutine Library. - (See the ReadMe - file for more information on installation of HSL - subroutines.) -
- (WB 2001/01/30) -
- -
- New: The ./configure script now checks for the - existence of a Fortran 77 compiler, and sets its path, some - compiler flags and the libraries to be linked in when mixing - C++ and F77 in some variables in the file - common/Make.global_options (see also - this - page). -
- (WB 2000/12/30) -
-

- - - - -

base

- -

- New: Color function DataOutBase::EpsFlags::reverse_grey_scale_color_function. -
- (WB 2001/08/24) - -
- New: Function QProjector::project_to_child - generates quadrature formulae which act on the area which a - child would occupy. -
- (WB 2001/08/23) - -
- Changed: The examples classes in the base directory are now - moved into a namespace Functions of - their own. This improves encapsulation, but also keeps the - documentation of these functions together, as they were - previously scrambled all over the screen in the documentation - page of the base library. -
- (WB 2001/07/18) - -
- New: classes FourierSineFunction - and FourierCosineFunction, - resembling one mode of a Fourier decomposition. Classes FourierSineSum and FourierCosineSum, resembling sums of such - modes of a Fourier decomposition. -
- (WB 2001/07/18) - -
- New: class vector2d was introduced - in analogy to STL class vector. The - bew class provides a two-dimensional array and replaces the use - of FullMatrix in the base library. -
- (GK 2001/05/21) - -
- Improved: JobIdentifier::operator() includes host name if - supported by the operating system -
- (GK 2001/05/17) - -
- New: There is now a new AutoDerivativeFunction class that - automatically computes the gradient of a function by employing - numerical difference quotients. This only, if the user function - does not provide the gradient function himself. This class can - replace the Function class as base - class for user defined Function - classes. -
- This new class can be used if the user only implements the - value function but wants to call - also the gradient functions. -
- (RH 2001/05/15) - -
- New: The Quadrature class now has a - constructor that only accepts quadrature points and sets the - weights to invalid values. -
- (GK 2001/04/26) - -
- New: The function Logstream::get_prefix allows access to the prefix - string used for log-files. -
- (GK 2001/04/26) - -
- New: There is now a global function trace that computes the trace of a tensor - of rank 2. -
- (WB 2001/04/12) -
- -
- New: The Threads now has a barrier - class in order to synchronise multiple threads. In - multithreaded mode, this is an alias to the ACE_Barrier class of the ACE library, if - deal.II is not configured for multithreading, then the class is - a dummy class that does nothing. -
- (WB 2001/03/19) -
- -
- New: We now support the output format of the Visualization Toolkit (Vtk) from the DataOutBase class and all derived classes. -
- (WB 2001/03/19) -
- -
- New: The class TensorProductPolynomials<dim> - performs the tensor product of 1d polynomials, computes its - values, its first and second derivatives. If n - polynomials are given to the constructor of this class, it - constructs n^dim tensor product - polynomials. -
- (RH 2001/03/14) -
- -
- New: LagrangeEquidistant is a new - class derived from Polynomial - providing the 1d Lagrange interpolation of degree - n of n+1 equidistant support points - in [0,1]. It is implemented up to degree 10. - This class is used for the implementation of the continuous and - discontinuous Lagrange elements. -
- (RH 2001/03/14) -
- -
- New: The new Polynomial class can - be used as base class for all 1d polynomials. It stores the - coefficients of the polynomial and uses the Horner scheme to - evaluate values and all derivates. -
- (RH 2001/03/14) -
- -
- New: function contract for two arguments of - Tensor<1,dim> -
- (GK 2001/03/05) -
- -
New: Logstream::log_time_differences (bool) makes Logstream print the time since the last - log line instead of accumulated time since program start. -
- (GK 2001/03/05) -
- -
Fix: Logstream::pop() does not perform anything on empty - stacks. -
- (GK 2001/03/05) -
- -
- Changed: Sort the quadrature points of each Quadrature<1> in ascending order. This - actually changed the order of the points of only QGauss4 and QGauss5. -
- (Ralf Hartmann 2001/01/22) -
- -
- New: function contract for two arguments of - Tensor<1,dim> -
- (GK 2001/01/15) -
-

- - - - -

lac

- -

- New: Function FullMatrix::symmetrize(). -
- (WB 2001/09/20) -
- -
- Improved: the stopping criterion of SolverBicgstab without computing the exact - residual is implemented -
- (GK 2001/09/11) -
- -
- New: The FullMatrix class now has a - function operator*=, which simply - scales the matrix. -
- (WB 2001/09/02) -
- -
- New: Function BlockSparseMatrix::el(), - just like SparseMatrix::el(). -
- (WB 2001/08/21) -
- -
- New: There is now a class MatrixOut - which can be used to convert a matrix into a graphical output, - for example in order to see visually that a matrix is - diagonally dominant or not. -
- (WB 2001/08/21) -
- -
- Changed: Base class Solver and all - Preconditioner classes are now - derived from Subscriptor. - Class PreconditionLACSolver now uses - smartpointers to the given solver and preconditioner - objects. You will, therefore, have to derive your own - preconditioners and solvers from Subscriptor if you want to use it with - PreconditionLACSolver. -
- (WB 2001/08/16) -
- -
- New: Classes Vector and - BlockVector now have member functions - operator*= which scale the vectors - by a constant factor. These functions are aliases for the - scale member functions except that - they return a reference to themselves. -
- (WB 2001/08/14) -
- -
- New: There is now a function - FullMatrix::precondition_Jacobi. The - PreconditionJacobi class is - therefore now also applicable with the full matrix class. -
- (WB 2001/08/11) -
- -
- New: The Vector and - BlockVector classes can now be - initialized using a new constructor that takes two iterators - that denote a range of elements which are to be copied. -
- (WB 2001/08/08) -
- -
- Changed: The SolverCG class now - saves the initial matrix vector product if the initial value of - the solution is vector is zero, as it is common practice to use - this is starting vector. -
- (WB 2001/06/25) -
- -
- New: SparsityPattern::reinit no - more throws an error if the given maximal row lengths are all - zero. -
- (WB 2001/06/25) -
- -
- New: Class CompressedBlockSparsityPattern - may be used as an intermediate form of the BlockSparsityPattern. -
- (WB 2001/06/23) -
- -
- New: Class CompressedSparsityPattern - may be used as an intermediate form of the SparsityPattern class if memory - requirements are tight during construction of the sparsity - pattern. -
- (WB 2001/06/22) -
- -
- New: There are now functions - SparsityPattern::copy_from and - SparseMatrix::copy_from - that can be used to construct sparsity patterns and matrix at - once, i.e. without setting up a sparsity pattern element by - element, possibly after using a way too large value for the - maximal row length, then calling - SparsityPattern::compress etc. -
- (WB 2001/05/07) -
- -
- New: BlockIndices::block_size - returns the size of a specified block. -
- (WB 2001/05/07) -
- -
- New: There is now a (private) function SparsityPattern::optimized_lower_bound - that is used as an optimized replacement for std::lower_bound for searching in the - column number arrays. It unrolls small loops and it also seems - that the compiler is able to optimized it better due to - eliminated template parameters, making it about twice as fast - as the standard implementation. In effect, it also speeds up - the SSOR preconditioner that spent about one third of its time - in that function by approximately 15 per cent. -
- (WB 2001/04/25) -
- -
- New: The FilteredMatrix class is a - replacement for the MatrixTools::apply_boundary_values - function for cases where you would like to solve several times - with the same matrix, either for different right hand sides, or - for different boundary values. -
- (WB 2001/04/27) -
- -
- New: There is now a function Vector::scale(Vector) - that scales each element of the vector by the corresponding - element of the argument. -
- (WB 2001/04/23) -
- -
Changed: Solver functions solve - return void now. If the solver has not converged within the - maximum number of iterations or encounters a breakdown, it - throws an exception of type SolverControl::NoConvergence instead of - returning a special value. -
- (GK 2001/03/29) -
- -
- New: The functions FullMatrix::mmult and Tmmult now have an additional - adding argument. If this flag is - true, the matrix-matrix product is added to the - resulting matrix; if false, the resulting matrix - is set to (overwritten by) the matrix-matrix product. The - latter is the behaviour these functions had before. Hence the - default value is set to be false to ensure - backward compatibility. -
- (RH 2001/03/29) -
- -
- New: class SchurMatrix implements - a Schur complement for block matrices. It provides matrix-vector - multiplication suitable for iterative methods as well as pre- and - post-processing of right hand side and slution, respectively. -
- (GK 2001/03/22) -
- -
- Removed: The explicite instantiations of SparseMatrix<long double> are - removed as a prerelease of gcc3.0 fails to compile it. A user - of SparseMatrix<long double> - needs now to include - lac/include/lac/sparse_matrix.templates.h into his - source file and to use an appropriate compiler, e.g. gcc2.95.2 or - a future version of gcc3.0 (that will then hopefully be fixed). -
- (RH 2001/03/14) -
- -
- New: class BlockMatrixArray<MATRIX> implements - a block matrix based on an array of matrix pointers. Since this - array may be incomplete, no direct access to entries is - allowed. Matrix blocks may be scaled and transposed. -
- (GK 2001/02/13) -
- -
- New: There is now some support to include and use routines from the - Harwell Subroutine Library, and support - classes - SparseDirectMA27 and - SparseDirectMA47 - for the sparse direct solvers MA27 and MA47. - (See the ReadMe - file for more information on installation of HSL - subroutines.) -
- (WB 2001/01/30) -
-

- - - - -

deal.II

- -

- New: Class MappingQ1Eulerian - implementing an Eulerian mapping. -
- (Michael Stadler 2001/09/24) -
- -
- New: VectorTools::create_boundary_right_hand_side - integrates boundary forces for inhomogeneous Neumann boundary values. -
- (WB 2001/09/13) -
- -
- New: DoFTools::make_flux_sparsity_pattern - now exists also for 1d. -
- (WB 2001/09/03) -
- -
- New: There are now two functions - FETools::hierarchic_to_lexicographic_numbering - and FETools::lexicographic_to_hierarchic_numbering - which map the hierarchical numbering used in continuous finite - element classes to a lexicographical numbering and back. -
- (WB 2001/08/31) -
- -
- New: ConstraintMatrix::close - now simply returns instead of throwing an exception, if the - matrix was already closed. -
- (WB 2001/08/30) -
- -
- New: Member function - ConstraintMatrix::is_identity_constrained. -
- (WB 2001/08/29) -
- -
- Fixed: in a rather rare case, some work was done twice in the - KellyErrorEstimator class when in - multithread mode. This is now fixed. -
- (WB 2001/08/24) -
- -
- New: There is now a class GridTools - which provides algorithms working on triangulations. At - present, it offers a function computing the diameter of a - triangulation. -
- (WB 2001/08/16) -
- -
- Changed: The MatrixCreator and MatrixTools class have lost their template - arguments. Rather, the individual functions now are templated - on their own, so the compiler can pick out the correct space - dimension on its own. -
- (WB 2001/08/15) -
- -
- Extended: ConstraintMatrix::merge - can now handle arguments which further constrain the present object. -
- (WB 2001/07/30) -
- -
- New: Implement - DoFTools::make_sparsity_pattern, - DoFTools::make_boundary_sparsity_pattern, - and - ConstraintMatrix::condense to work on - the CompressedSparsityPattern and - CompressedBlockSparsityPattern and - classes. -
- (WB 2001/06/22) -
- -
- New: FE*Values::get_quadrature - returns a reference to the quadrature formula used by a - FEValues object. -
- (WB 2001/06/21) -
- -
- New: DoFTools::compute_intergrid_transfer_representation - is a function that generates a matrix representation that can - be used to transfer data from one grid to one component of the - fields on another, finer, grid. -
- (WB 2001/05/24) -
- -
- Changed: the GeometryInfo class - has been reverted from a general template that calculates the - values of its member variables by recursion/induction to a set - of explicitely specialized classes. This seemed necessary since - most compilers objected to the old implementation as the - declaration of the values of the class required knowledge of - the elements of the class with one lower dimension which was, - however, only being declared at present except for 1d. Also, - allocating space for variables was difficult as that would mean - declaring specializations after their first use. The new (and - very old) implementation is entirely compatible to the previous - one. -
- (WB 2001/05/23) -
- -
- Changed: the classes that denote flags to the TimeStepBase_Tria class have been move - from local classes to a namespace of their own, names - TimeStepBase_Tria_Flags. -
- (WB 2001/05/23) -
- -
- Fixed: due to a bug in gcc, the compiler did not check that we - did not use the set of given boundary indicators to the - DoFTools::extract_boundary_dofs - function in 1d. That set was therefore ignored. This is now - fixed. -
- (WB 2001/05/18) -
- -
- Changed: the flags which are given to the GridOut class to modify the appearance of - the output have been moved from local classes of the GridOut class to a namespace names - GridOutFlags and have lost the - trailing Flags part in their name. - This change was necessary as C++ does not allow explicit - specialization of member classes; the previous use in the - library was only accepted by GCC as an extension. -
- (WB 2001/05/17) -
- -
- New: The functions DoFTools::map_dof_to_boundary_indices, - DoFTools::make_boundary_sparsity_pattern, - DoFHandler::n_boundary_dofs, - DoFHandler::max_couplings_between_boundary_dofs, - and VectorTools::project_boundary_values, - are now also implemented in 1d. -
- (WB 2001/04/29) -
- -
- New: There are now functions DoFTools::map_dofs_to_support_points and - DoFTools::map_support_points_to_dofs that - generate a map between DoF indices and the support points of - these DoFs, and the other way round. -
- (WB 2001/04/24) -
- -
- New: Implement the VectorTools::interpolate_boundary_values - a second time, this time taking a FunctionMap object as do all the other - functions of this type. -
- (WB 2001/04/23) -
- -
- Fixed: The vertex numbers written by the GridOut::write_ucd_faces function are now also - 1-based. This, to be consistent with the vertex numbers given - by the GridOut::write_ucd function. -
- (RH 2001/04/20) -
- -
- Extended: the DerivativeApproximation class now also - works in 3d, as the spectral norm of a symmetric 3x3 matrix can - now be computed. -
- (Roger Yound 2001/04/12) -
- -
- Fixed: the DoFRenumbering::Cuthill_McKee function - did not work correctly when giving the reversed_numbering - flag (off-by-one indexing). This is now fixed. -
- (Oliver Rheinbach 2001/04/12) -
- -
- Changed: A typedef FunctionMap was - declared in at least four places previously (in classes DoFHandler, MatrixTools, VectorTools, and KellyErrorEstimator). It is now unified in - one place and is called FunctionMap<dim>::type (it is a local - typedef in a class called FunctionMap). This type is defined in the - file dofs/function_map.h. -
- (WB 2001/04/09) -
- -
- Fixed: When using Neuman boundary functions in the - KellyErrorEstimator class, it was - assumed that the function object had Function::vector_value overloaded, even - in the scalar case. We now use Function::value instead. -
- (WB 2001/04/09) -
- -
- New: The various MatrixCreator::create_*_matrix functions - are now using multiple threads to do their work, if the library - is configured to use multithreading. -
- (WB 2001/04/08) -
- -
- New: The following functions are extended to work - on arbitrary mappings: -
- The static create_mass_matrix, - create_boundary_mass_matrix and - create_laplace_matrix member - functions of the class MatrixCreator, -
- the static project and project_boundary_values member functions - of the class VectorTools, -
- the two versions of the static estimate member functions of the class - KellyErrorEstimator, -
- and the static approximate_gradient - and approximate_second_derivative - member functions of the class DerivativeApproximation. -
- -
- All these functions now take a Mapping object as additional argument. -
- For backward compatibility there exist second versions of - each of these functions that still don't have a Mapping argument. These functions - implicitely use a mapping of the class MappingQ1. -
- (RH 2001/04/05) -
- -
- Removed: Along with the redesign of the FiniteElement and the Mapping classes the FiniteElement::get_local_mass_matrix function is now - removed. This was necessary as the local mass matrix depends not only on the - considered FiniteElement but also on - the mapping between the unit to the real cell. Hence this function - cannot be a member function of a FiniteElement any more. -
- -
- As a consequence also the MatrixCreator::create_mass_matrix function with two - arguments is removed, as it relied on the get_local_mass_matrix function. If in - future the user wants to create a mass matrix he needs to use - one of the remaining MatrixCreator::create_mass_matrix functions that require - an appropriate Quadrature as - argument. -
- (RH 2001/04/04) -
- -
- New/Fixed: Now there exists a new Triangulation::ExcMultiplySetLineInfoOfLine exception, - that is thrown if the SubCellData - that is given to Triangulation::create_triangulation, multiply includes - the line info of a specific line. Before the fix the wrong - ExcInteriorLineCantBeBoundary - exception was thrown. -
- (RH 2001/04/03) -
- -
- Fixed: Missing ucd is now added to the list of - supported output formats returned by GridOut::get_output_format_names. -
- (RH 2001/04/03) -
- -
- New/fixed: In some obscure corner cases, the detection logic in DataOut_DoFData::add_data_vector would - not have been able to detect whether something is a DoF data - vector or a vector of cell data, and in some equally rare cases - this would also have made a difference. This is now fixed by - adding another argument to the function telling it either to - automatically detect the vector type (default) or to assume - that it has a certain type (for these corner cases). -
- (WB 2001/03/30) -
- -
- Removed: the ProblemBase class, - which has been deprecated since before the release of - deal.II 3.0, has finally been removed. The - same applies for the classes - Assembler, - Equation, - MassMatrix, and - LaplaceMatrix. -
- (WB 2001/03/27) -
- -
- New: There is now a class MappingC1 - that implements a continously differentiable C¹ - mapping of the boundary by using a cubic mapping with - continuous derivatives at cell boundaries. The class presently - only implements something for 2d and 1d (where it does nothing). -
- (WB 2001/03/27) -
- -
- New: The static interpolate, create_right_hand_side, interpolate_boundary_values, integrate_difference and compute_mean_value member functions of - the class VectorTools are extended - to work on arbitrary mappings. All these functions now take a - Mapping object as additional - argument. -
- For backward compatibility there exist second versions of - each of these functions that still don't have a Mapping argument. These functions - implicitely use a mapping of the class MappingQ1. -
- (RH 2001/03/27) -
- -
- New: Boundary and derived classes - now have a function get_normals_at_vertices that returns a - multiple of the normal vector to the boundary at the - vertices of a given face. This is used in the construction of - C¹ mappings of the boundary. -
- (WB 2001/03/23) -
- -
- New: The new function PersistentTriangulation<dim>::restore(unsigned int) allows to restore - the triangulation step by step. -
- New: Now there exists a function PersistentTriangulation<dim>::clear_flags to allow to re-read_flags without the need of clearing - the triangulation in advance. -
- New: The new function PersistentTriangulation<dim>::n_refinement_steps returns the number of - refinement steps stored in refine_flags. -
- (RH 2001/03/20) -
- -
- New: GridGenerator::hyper_rectangle creates - coordinate-parallel rectangles in arbitrary dimension. -
- (GK 2001/03/16) -
- -
- Changed: The syntax of the FiniteElement<dim>::get_unit_support_points function is - changed; it returns a reference to the vector of points in lieu - of taking this vector as argument. The unit support points are - now computed by the constructor of the FiniteElement and not on each FiniteElement<dim>::get_unit_support_points function call as - before. -
- (WB 2001/03/14) -
- -
- Removed: The function FiniteElement<dim>::get_support_points - is removed as the FiniteElement - cannot know the position of the support points by itself. This is - because the support points depend on the unit support points - (known to the FiniteElement class) - but they also depend on the mapping. - - In future the support points can be computed using a FEValues object initialized with the Mapping and a Quadrature that uses the unit support - points as quadrature points. -
- (RH 2001/03/14) -
- -
- New: The class Boundary has two new - functions get_intermediate_points_on_line and get_intermediate_points_on_quad that - needs to be implemented in derived classes only if GridOut is used with MappingQ of degree p>2. -
- (RH 2001/03/14) -
- -
- - New: The functions GridOut::write_gnuplot and GridOut::write_eps now take a pointer to - a Mapping object as additional - argument. This allows to write grids in 2d whereby cells with a - curved boundary are transformed by the given Mapping class. The default mapping is - MappingQ1. Note, that the grids do - not show the `original' domain with boundaries described by the - Boundary classes but the - discretized domain whose boundary cells are transformed using the - given mapping. -
- There are also a new GnuplotFlags::n_boundary_face_points and - EpsFlags::n_boundary_face_points - variables to set the number of additional points written - to represent the curved boundary faces. -
- (RH 2001/03/14) -
- -
- New: The constructor of the FEValues - and FE(Sub)FaceValues classes now - take a reference of a Mapping object - as additional argument. This is the new possibility to combine - a FiniteElement with an arbitrary - Mapping, see also New FE and Mapping Design. -
- -
- For backward compatibility there still exists a constructor of - FEValues without a Mapping argument that uses a MappingQ1 by default. -
- (RH 2001/03/14) -
- -
- Changed: We now unconditionally include - deal.II/include/grid/tria_accessor.templates.h - (which containts some inline functions for triangulation - accessor classes) into - deal.II/include/grid/tria_accessor.h to work - around a problem with gcc3.0 which does not place a copy of - these functions into the library. Previously we only included - the file in optimized mode. -
- (RH 2001/03/14) -
- -
- New: The class GridReordering::Cell has - now a copy constructor to work around a bug in a gcc3.0 - snapshot. -
- (RH, WB 2001/03/14) -
- -
- Changed: when refining a hexahedron in 3d, the rules by which - the new vertices at the centers of the faces and at the center - of the cell are placed, are changed. They are changed in a way - as to minimize the distortion of the resulting cells from the - optimal shape and to make them look as much alike as possible - to generate a smoother grid. -
- (WB 2001/03/02) -
- -
- Fix: the DoFTools::compute_intergrid_constraints - function took memory quadratic in the number of degrees of - freedom. This is now reduced to linear behaviour, with a - constant that depends on the number of levels by which the two - grids differ. -
- (WB 2001/02/26) -
- -
- Fix: in the triangulation, the straight_boundary variable, which is a - reference, was assigned the address of a temporary object. It - is unclear how this could have worked for three years, but it - apparently did... -
- (WB 2001/02/26) -
- -
- New: The DoFTools class now has - a function count_dofs_per_component - that counts the number of degrees of freedom in each of the - components of the finite element, i.e. how many degrees of - freedom there are on the global mesh for each variable (field). -
- (WB 2001/02/22) -
- -
- New: The CellAccessor class now has a function - has_boundary_lines that mostly has - the same semantics that at_boundary - has, but also covers the case that a hexahedron in 3d may be at - the boundary only by one line, rather than by a whole face. In - that case, at_boundary reports - false, while has_boundary_lines - reports true. -
- (WB 2001/02/21) -
- -
- New: There is now a function - ConstraintMatrix::merge that merges - the constraints represented by two constraint matrices into one - object. -
- (WB 2001/01/31) -
-

- -

-Last update $Date$ - - - -- 2.39.5