The deal.II news page

From: wolf Date: Mon, 8 Jan 2001 09:02:48 +0000 (+0000) Subject: Rename to 3.0.0-vs-3.1.0.html X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=d2318a3ddb6616174921c2820d9aa9b3bc98a6f9;p=dealii-svn.git Rename to 3.0.0-vs-3.1.0.html git-svn-id: https://svn.dealii.org/branches/Branch-3-1@3607 0785d39b-7218-0410-832d-ea1e28bc413d --- diff --git a/deal.II/doc/news/2000/c-3-0.html b/deal.II/doc/news/2000/c-3-0.html deleted file mode 100644 index 38ba2b05dd..0000000000 --- a/deal.II/doc/news/2000/c-3-0.html +++ /dev/null @@ -1,1090 +0,0 @@ - - - - - - The deal.II news page - - - - - - -

Changes after Version 3.0

- -This is a quite extensive list of changes made after the release of -deal.II version 3.0. 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: In multithreading mode, the compile flags now also have - _REENTRANT defined. If this flag - is defined, then the standard Unix headers also declare - reentrant versions (with suffix _r) - of many functions. -
- (WB 2000/09/20) -
- -
- New: Major and minor version numbers of the - deal.II library are now passed to the - compiler as preprocessor variables - DEAL_2_MAJOR and - DEAL_2_MINOR. Their present values - are 3 and 1, respectively. Variables of the same name are also - available in Makefiles. -
- (WB 2000/09/18) -
- -
- New: the step-9 example program is - now ready, showing several advanced programming techniques in - deal.II. -
- (WB 2000/07/18) -
- -
- Changed: deal.II now uses the - kdoc2 program to generate the API - documentation. This makes up for much nices documentation and - also works better than the previous kdoc1. - A copy of kdoc2 is provided within - the deal.II source tree. -
- (WB 2000/06/28) -
- -
- Changed: when compiling files, the output generated by the - make program now indicates also - whether we are compiling for multithread mode, besides the - information whether the file is compiled for debug or optimized - mode. -
- (Ralf Hartmann 2000/06/26) -
- -
- Fixed: the - common/scripts/make_dependencies.pl - script that sets up the dependencies for the make files had a - problem when the path to the library included special characters - such as `+'. This is now fixed. -
- (WB 2000/06/15) -
- -
- New: the configure script now - checks whether the getrusage function is properly - declared (this function is used in the timer class). The - problem is that on SunOS 4.x, this function exists, but is not - declared in the right file (although it is listed in the man - pages). We then have to declare it ourselves. -
- (WB 2000/06/14) -
- -
- New: the configure script now - enforces the compiler flags -ansi -pedantic when - compiling in debug mode. This should force us to write more - standard compliant code. (Since the ACE library is not - standards conforming, the -ansi flag is not used - when multithreading is requested.) -
- (WB 2000/06/14) -
- -
- Improved: the configure script is - now used to select the compiler options. Previously, selection - of compiler options was done both in - configure as well as in the global - options Makefile - common/Make.global_options. -
- (WB 2000/06/02) -
- -
- Improved: Dependence on the files - forward_declarations.h has been widely - removed to improve compilation time -
- (GK 2000/05/24) -
- - -
- Fix: configure now uses - config.guess to determine the - operating system and hardware platform. -
- (GK 2000/04/05) -
-

- - - - -

base

- -

- Improved: exceptions ExcIO and ExcOutOfMemory are defined globally now. -
- (GK 2000/12/07) -
- -
- Improved: ParameterHandler now has a - function log_parameters which - allows output of all parameters to a log file. -
- (GK 2000/12/07) -
- -
- New: almost all classes that store data now have a function - memory_consumption that returns an - estimate of the amount of memory (in bytes) used up by this - class. Supporting functions to compute the size of STL vectors - and other objects can be found the - MemoryConsumption namespace. -
- (WB 2000/11/27) -
- -
- New: Class FunctionDerivative - computes finite difference approximations of a directional - derivative of a Function. -
- (GK 2000/11/13) -
- -
- New: The DataOutBase and - DataOutBase::Patch classes have been - changed so as to allow output of objects that have an other - dimension than the surrounding space, for example writing faces - instead of cells (this might be useful to write only external - faces in 3d computations). -
- (WB 2000/09/07) -
- -
- New: There is a new distance function - in the Point class that calculates the - distance between two points. -
- (Ralf Hartmann 2000/09/06) -
- -
- New: Timer now uses the system - function getrusage (RUSAGE_CHILDREN, - .) that is need in multithreading. But still the Timer class does not yet work in - multithreading, as getrusage with flag RUSAGE_CHILDREN gives always - 0 (at least on Solaris7). -
- (Ralf Hartmann 2000/08/25) -
- -
- New: There are now a set of functions - outer_product that for the outer - product of tensors. -
- (WB 2000/07/23) -
- -
- New: The classes - Patterns::Integer - and Patterns::Double now allow that - a range may be specified in which the parameter shall - be. Furthermore, instead of a class, - Patterns is now a namespace, so it - can be reopened in case you want to write another pattern class - and want to put it into the same namespace. -
- (WB 2000/07/21) -
- -
- New: classes QMilne and QWeddle for closed Newton-Cotes-formulæ of - orders 7 and 9, respectively. -
- (GK 2000/07/07) -
- -
- New: There is now a function invert - (Tensor<2,dim>) that returns the inverse of a tensor of - rank 2. -
- (WB 2000/04/14) -
- -
- New multithreading scheme is implemented. -
- (WB 2000/04/13) -
- -
- Improved: Subscriptor prints the - real class name if a subscribed object is deleted. -
- (GK 2000/04/12) -
-

- - - - -

lac

- -

- Improved: block classes have a variable number of blocks now, - not a template parameter. -
- (GK 2000/12/07) -
- -
- New: BlockDiagonalMatrix is a - template that generates a matrix with multiple copies of the - same block on the diagonal. -
- (GK 2000/12/07) -
- -
- - Improved: Krylov-space solvers do not use the function residual - anymore. This allows easier implementation of new matrix - classes. SolverGMRES now also counts - the first iteration step. Finally, all solvers inherit a Subscriptor. -
- (GK 2000/12/07) -
- -
- New: There are now functions - SparsityPattern::symmetrize and - SparseMatrix::symmetrize that - generate a symmetric matrix from a non-symmetric one. -
- (WB 2000/12/02) -
- -
- New: almost all classes that store data now have a function - memory_consumption that returns an - estimate of the amount of memory (in bytes) used up by this - class. -
- (WB 2000/11/27) -
- -
- New: - SparseMatrix::n_actually_nonzero_elements - returns the number of entries that are actually nonzero. -
- (Ralf Hartmann 2000/11/22) -
- -
- Fixed: unlike announced in the docs, the - FullMatrix::norm2 function did not - return the Frobenius norm of a matrix, but its square. This is - fixed now. -
- (GK 2000/08/28) -
- -
- Improved: PreconditionBlockSOR::Tvmult(...) is implemented. -
- (GK 2000/07/07) -
- -
- Improved: The breakdown criterion of SolverBicgstab can be changed by the use - of SolverBicgstab::AdditionalData. -
- (GK 2000/07/07) -
- -
- New: SolverRichardson has a - transposed solver Tsolve(...). It - uses the functions Tvmult(...) of - the provided matrix and preconditioner. -
- (GK 2000/07/07) -
- -
- Improved: FullMatrix::invert(...) now inverts matrices of all - sizes. If there is no hardcoded inversion, gauss_jordan() is used implicitly. -
- (GK 2000/06/30) -
- -
- New: For recognizing a diverging solver before the maximum - number of steps is reached, - SolverControl returns - failure also if the residual - increases over the start residual by a specific factor. This - factor is given to the SolverControl - object by the set_failure_criterion - function. After calling the latter function, checking of this - additional failure criterion may again be disabled by calling - clear_failure_criterion. -
- (Ralf Hartmann 2000/06/26) -
- -
- Improved: The interface of preconditioner classes has changed. - Preconditioners are now considered linear operators like - matrices: they have members vmult - and Tvmult instead of the old operator(). This will allow the - implementation of further non-symmetric solvers. -
- (GK 2000/06/20) -
- -
- New: there is now a function - SparseMatrix::el that does mostly - the same as SparseMatrix::operator(), - but returns a zero if elements of the matrix are accessed that - are not in the sparsity pattern. Thus, the new function allows - to actually traverse rows or columns of the matrix without - taking care of the sparsity pattern, while - SparseMatrix::operator() should be - used to write algorithms more efficiently. -
- (WB 2000/06/02) -
- -
- Fix: - SparsityPattern::print_gnuplot - wrote rows and columns exchanged. Since most matrices have - symmetric sparsity patterns, this has gone unnoticed by now. -
- (WB 2000/05/30) -
- -
- Fix: the - FullMatrix::Tvmult function - suffered from the same problems as the - FullMatrix::Tmmult function. This - is now fixed as well. -
- (WB 2000/05/26) -
- -
- New: Class PreconditionBlockJacobi. -
- (GK 2000/05/24) -
- -
- New: SolverControl has an interface - to ParameterHandler, definining and - reading parameters from a file automatically. -
- (GK 2000/05/24) -
- -
- New: BlockIndices: Class that - manages the conversion of global indices into a block - vector/matrix/... to the indices local to each of the blocks. -
- (WB 2000/05/08) -
- -
- New: BlockSparsityPattern and - BlockSparseMatrix: Classes that - represent matrices that are composed of sparse matrices. -
- (WB 2000/05/08) -
- -
- Fix: the - FullMatrix::mmult and - FullMatrix::Tmmult code don't - resize their output argument any more, as this is not common - style in the library. Furthermore, - FullMatrix::Tmmult was utterly - broken. -
- (WB 2000/05/08) -
- -
- Change: the matrix_norm functions - of sparse and full matrices are renamed to - matrix_norm_square, since they in - fact return the square of the norm. This should avoid confusion - in some cases. -
- (WB 2000/05/05) -
- -
- Fix: the ``copy-like'' constructor of - SparsityPattern that copies another - object and adds some off-diagonals had a bug that caused an - exception in some cases. This is now fixed. -
- (WB 2000/05/04) -
- -
- New: SwappableVector: Class that - allows to swap out the data of a vector to disk and reload it - later on. It also has a function to preload the data before its - use in a separate thread if the library is configured for - multi-threading. -
- (WB 2000/05/03) -
- -
- New: there are now functions Vector::swap - and BlockVector::swap, as well as - global functions swap(u,v) that - exchange the data of two vectors without needing a temporary - vector and without copying around data. Their run-time is - therefore independent of the length of the vectors. -
- (WB 2000/05/02) -
- -
- Fix: SolverCG counts steps properly. -
- (GK 2000/04/25) -
- -
- Change: the solver classes in LAC lost their first template - argument. Their names are now - SolverXX<VECTOR>, where - XX denotes the name of the solver - (e.g. CG, GMRES, etc). Furthermore, the - inheritance from Solver was made private - to reflect the logical structure. -
- (GK 2000/04/25) -
- -
- New: EigenInverse implements inverse - iteration by Wieland. -
- (GK 2000/04/20) -
- -
- New: EigenPower implements power - method by von Mises -
- (GK 2000/04/19) -
- -
- New: PreconditionBlockSOR::set_omega - allows to change the relaxation parameter. -
- (GK 2000/04/12) -
- -
- New: SolverXX: There is a virtual function - print_vectors called in every step. It is void in the - solver itself but can be used to print intermediate iteration - vectors. -
- (GK 2000/04/05) -
-

- - - - -

deal.II

- -

- Extend: DoFTools::extract_boundary_dofs - now allows to also specify which boundary conditions shall be - considered. -
- (WB 2000/12/04) -
- -
- New: some arguments of the functions - DoFHandler::n_boundary_dofs, - DoFTools::extract_boundary_dofs, - and - DoFTools::map_dof_to_boundary_indices - are changed from list to - set, since that resembles more - closely the purpose of the parameter, and makes computations - slightly faster. -
- (WB 2000/12/04) -
- -
- New: almost all classes that store data now have a function - memory_consumption that returns an - estimate of the amount of memory (in bytes) used up by this - class. -
- (WB 2000/11/27) -
- -
- New: The ConstraintMatrix::add_entries - function add several constraints at once. -
- (WB 2000/10/26) -
- -
- New: The DoFRenumbering::random - function renumbers degrees of freedom in a random way. -
- (WB 2000/10/22) -
- -
- New: The TriaAccessor now has a - function point_inside that checks - whether a certain point is inside a given cell. -
- (Thomas Richter 2000/10/12) -
- -
- New: The FiniteElement has got two - new functions transform_unit_to_real_cell - and transform_real_to_unit_cell -. They allow to transform points from reference (unit) - cell to real cell and visa versa. transform_real_to_unit_cell involves a - Newton iteration and works for all dimensions and all mappings - used to transform from unit to real cell. -
- (Ralf Hartmann 2000/10/12) -
- -
- Extended: The Triangulation - class can handle boundary information in 3d as well - (i.e. lines and quads in 3d with special material IDs). -
- (Michael - Stadler 2000/10/11) -
- -
- Extended: The GridIn - class can now read 3D UCD data, including boundary information - (i.e. lines and quads in 3d with special material IDs). -
- (Michael - Stadler 2000/10/11) -
- -
- New: The GridRefinement::refine_and_coarsen_optimize - function implements an alternative way to flag cells for - refinement and coarsening. -
- (Thomas Richter 2000/10/10) -
- -
- Extended: The GridIn::delete_unused_vertices - function now eliminates vertices from the input that are not - referenced by any of the cells in the input file. This makes is - simpler to delete some cells from the input file by hand, - without the need to update the vertex lists, which can be - tiring as several cells usually use each vertex. All functions - in the GridIn reading grids in - several input files call this function before passing the data - to the triangulation object. -
- (WB 2000/09/26) -
- -
- New: The GridIn - class can now read the basics of grids in DB Mesh format. -
- (WB 2000/09/26) -
- -
- Extended: The KellyErrorEstimator - class is now able to estimate errors for several solution - vectors at the same time, provided they live on the same - DoFHandler object. -
- (WB 2000/09/11) -
- -
- New: The DataOut_Faces class allows to - output faces instead of cells. This might be handy for 3d - computations if one is only interested in surface plots, or - cuts through the domain. -
- (WB 2000/09/07) -
- -
- Removed: The - DataOut_Old class has finally gone for - good. It was already deprecated in version 3.0, and has been - superceded for a long time by the framwork of classes around - DataOutBase and - DataOut. -
- (WB 2000/09/07) -
- -
- New: There is now a function - DoFHandler::n_boundary_dofs - that takes the list of selected boundary indicators as a - list of values, rather than the - usual map of pairs of boundary - indicators and function object pointers. -
- (WB 2000/08/25) -
- -
- Changed: The - map_dof_to_boundary_index - functions have been moved from the DoFHandler - to the DoFTools class, in order to - further remove code from the big classes which is necessarily - needed there. -
- (WB 2000/08/25) -
- -
- New: there is now a class DataOutRotation - that can be used to output data which has been computed - exploiting rotational symmetry, on the original domain. Thus, - the output is of one dimension higher than the computation was, - where the computed solution is rotated around the axis of - symmetry. -
- (WB 2000/08/14) -
- -
- New: class HalfHyperShellBoundary - and GridGenerator::half_hyper_shell - generate a half shell, useful for computations with a shell - domain and rotational symmetry. -
- (WB 2000/08/08) -
- -
- Changed: The functions - Triangulation::refine, - Triangulation::coarsen, - Triangulation::refine_and_coarsen_fixed_fraction, - and - Triangulation::refine_and_coarsen_fixed_number - have been moved from the triangulation class to a separate - class GridRefinement as they are not - intricately bound to the triangulation but rather form a - distinct class of functions that flag cells for refinement or - coarsening based on error indicators. -
- (WB 2000/07/28) -
- -
- New: DataOut::clear_input_data_references - clears all reference to input data vectors and to the DoFHandler. This function may be useful - after the patches have been built, to release memory as early - as possible, in this case before the output is actually written. -
- (WB 2000/07/26) -
- -
- New: class DerivativeApproximation - approximates the norm of the gradient or second derivative of a - finite element field on each cell from finite difference - approximations. -
- (WB 2000/04/14 and 2000/07/23) -
- -
- Fix: Add a missing assertions in FEValuesBase::get_function_*. If an ExcAccessToUninitializedField is now thrown - then probably an update_values or - update_gradients is missing in the - UpdateFlags of a used FEValues. Adding this assertion uncovered - several other errors which are now also fixed; these errors - were dormant, since the values of finite elements are always - computed for the presently available Lagrange elements, but - would have been activated once there are other classes of - elements. -
- (Ralf Hartmann 2000/07/20) -
- -
- New: Class DoFRenumbering now has - functions for cell-wise downstream renumbering for - discontinuous elements. The parameters of the function sort_selected_dofs_back have been - switched to match the interfaces of all other functions in this - class. -
- (GK 2000 Jour de Bastille) -
- -
- New: Function VectorTools::compute_mean_value integrates the mean - value of one component of a finite element function. -
- (GK 2000/07/12) -
- -
- New: The new function get_face - of FEFaceValues and FESubfaceValues returns an iterator of the - present face. This is the face, for that the FE(Sub)FaceValues object was reinited - the last time. -
- (Ralf Hartmann 2000/06/26) -
- -
- New: classes FEDG_Px implement - complete polynomial spaces of degree x on - quadrilaterals. Since they have less degrees of freedom than - FEDG_Qx, there is no continuous - version for these elements. Implementation for P4 and 3D is - still incomplete. -
- (GK 2000/06/20) -
- -
- Fix: slight bug in - DataOut::build_patches - in multithreaded mode fixed. -
- (Ralf Hartmann, 2000/05/29) -
- -
- New: class FETools performs - interpolations and extrapolations of discrete functions from one - FiniteElement to another FiniteElement. It also provides the local - interpolation matrices that interpolate on each - cell. Furthermore it provides the interpolation difference - matrix id-I_h that is needed for evaluating - (id-I_h)z for e.g. the dual solution z. -
- -
- Removed: The obsolete - MatrixCreator::create_interpolation_matrix - function is now removed. -
- -
- (Ralf Hartmann 2000/05/26) -
- -
- New: DoFTools::make_flux_sparsity_pattern - can be optimized by providing two coefficient matrices. -
- (GK 2000/05/25) -
- -
- Improved: VectorTools::integrate_difference - allows for vector-valued weight functions. L¹ and - L^infinity norms are calculated correctly. -
- (GK 2000/05/25) -
- -
- Changed: FE_DGx::restriction is - not an interpolation any more but a local projection which is - more reasonable for DG elements. -
- (Ralf Hartmann 2000/05/22) -
- -
- Changed: enum - MeshSmoothing is moved into the - Triangulation class. -
- (Ralf Hartmann 2000/05/18) -
- -
- New: Triangulation::patch_level_1 - is a new mesh smoothing. A mesh of patch level 1 consists of - patches, i.e. they consists of cells that are all refined at - least once. -
- -
- Changed: As follows from the existence of this new smoothing, - maximum_smoothing will include this - smoothing. -
- -
- (Ralf Hartmann 2000/05/18) -
- -
- Changed: the - MatrixTools::apply_boundary_values - now uses a much faster algorithm when working on matrices with - symmetric sparsity patterns. On the other hand, it does no more - eliminate whole rows when a matrix has a non-symmetric sparsity - pattern, or if the user (through a new flag) tells the function - that this is not necessary, for example if the matrix itself is - non-symmetric. -
- -
- For symmetric sparsity patterns, the algorithm now eliminates - each boundary value in O(m*log(m)) steps instead of - O(N*log(m)), where N=number of rows of the matrix, and m=number - of entries per row. Note that m is roughly constant, - irrespective of N, so the old algorithm became slower with - finer grids, while the new one is O(1) for each boundary degree - of freedom. -
- -
- (John Burnell, WB 2000/05/17) -
- -
- New: many functions are now templatized on the data type of the - vector they take or return. They thus now support - Vector<float>, but also - BlockVector<...>. An - incomplete and growing list of functions that were treated in - this way is: -
- - DoFAccessor::get_dof_values, -
- - DoFAccessor::set_dof_values, -
- - DoFAccessor::get_interpolated_dof_values, -
- - DoFAccessor::set_dof_values_by_interpolation, -
- - FEValues::get_function_values, -
- - FEValues::get_function_grads, -
- - FEValues::get_function_2nd_derivatives, -
- - MatrixTools::apply_boundary_values, -
- - Several functions in ConstraintMatrix. -
-
- (WB 2000/05/16 and later) -
- -
- Changed: The computation of the Jacobian matrices in the - FEValues class is now done more - efficiently. The speedup is in the range of a factor of 40 for - 3D. -
- (John Burnell, WB 2000/05/16) -
- -
- Change: DoFTools::make_hanging_node_constraints () - does not use the user flags any more, and can thus run in - parallel more than once. -
- (WB 2000/05/15) -
- -
- Extended: DoFTools::make_sparsity_pattern () - now accepts a template parameter as sparsity pattern. This - allows to use this function for the usual - SparsityPattern, or for - BlockSparsityPattern arguments. -
- (WB 2000/05/15) -
- -
- New: DoFTools::extract_hanging_node_dofs () - identifies nodes that will be constrained by hanging node constraints. -
- (WB 2000/05/12) -
- -
- New: DoFRenumbering::sort_selected_dofs_back () - sorts selected degrees of freedom to the end of the index - range. -
- (WB 2000/05/12) -
- -
- Change: the return value of - DoFHandler::max_couplings_between_dofs () - is bounded by DoFHandler::n_dofs(). -
- (Ralf Hartmann 2000/05/11) -
- -
- New: FEValuesBase::get_cell () - returns present cell. -
- (Ralf Hartmann 2000/05/11) -
- -
- Fix: FESystem::reinit() generated - an exception if update_support_points - was set. -
- (WB 2000/05/10) -
- -
- New: IntergridMap::get_{source,destination}_grid - functions return the grids for which the map was created. -
- (WB 2000/04/19) -
- -
- Fix: in three space dimensions, the triangulation class - over-estimated the necessary amount of memory needed upon - refinement and allocated too much. -
- (WB 2000/04/19) -
- -
- New: DoFTools::extract_boundary_dofs - finds all degrees of freedom which are at the boundary and belong to - specified components. -
- (WB 2000/04/17) -
- -
- New: DoFTools::compute_intergrid_constraints - allows to use different discretization grids for different - variables. -
- (WB 2000/04/15) -
- -
- New: DataOut::clear_data_vectors - allows to re-use an object without deleting the DoFHandler. -
- (GK 2000/04/05) -
- -
- New: class DoFPrintSolverStep prints - intermediate vectors of a solver as finite element functions using - DataOut. -
- (GK 2000/04/05) -
- -

- -

-Last update $Date$ - - -