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+
+
+<h2>Changes between versions 3.3.0 and 3.4.0</h2>
+
+<p>
+This is a quite extensive list of changes made between versions 3.2.0
+and 3.3.0 of <acronym>deal.II</acronym>. It is subdivided into changes
+made to the three sub-libraries <a href="#base">base</a>, <a
+href="#lac">lac</a>, and <a href="#deal.II">deal.II</a>, as well as
+changes to the <a href="#general">general infrastructure,
+documentation, etc</a>.
+</p>
+
+<a name="general"></a>
+<h3>General</h3>
+
+<ol>
+ <li> <p>
+ <strong>
+ Deprecated: The functions <code
+ class="member">FEValuesBase::get_shape_values</code>, <code
+ class="member">FEValuesBase::get_shape_grads</code>, and <code
+ class="member">FEValuesBase::get_shape_2nd_derivatives</code> are
+ now deprecated as they expose too much of the internal data
+ structure of their class, and interfere with plans for the
+ extension of this and related classes. The functions still
+ exist in this release of the library, but will be removed in
+ the next version. Use the <code
+ class="member">FEValuesBase::shape_value</code> and alike
+ functions as a replacement.
+ <br>
+ For more information, read
+ <a href="http://www.dealii.org/mail/msg00638.html" target="body">this mail</a>.
+ </strong>
+ <br>
+ (WB 2002/06/03)
+ </p>
+
+ <li> <p>
+ Added: The <code>configure</code> script now recognizes Intel's ECC
+ compiler when run on Itanium systems with this compiler present.
+ The ECC compiler is similar to the ICC compiler but it acccepts some
+ different options.
+ <br>
+ (BK 2002/05/22)
+ </p>
+
+ <li> <p>
+ New: The step-14 example program demonstrates duality based
+ error estimators and some more software design concepts.
+ <br>
+ (WB 2002/05/05)
+ </p>
+
+ <li> <p>
+ New: In all previous versions, <acronym>deal.II</acronym> used
+ the <a href="http://www.cs.wustl.edu/~schmidt/ACE.html"
+ target="_top">ACE (Adaptive Communications Environment)</a>
+ library to support cross-platform threading
+ facilities. While this is still supported, the default way
+ is now to use the POSIX threading functions that are
+ available on many systems. The relieves you from the need of
+ installing a huge library of which the most part is not used
+ anyway. However, if you use ACE for other reasons, then it is
+ still supported. For installation instructions, see the
+ <a href="../../readme.html" target="body">ReadMe</a> file.
+ <br>
+ (WB 2002/04/30)
+ </p>
+
+ <li> <p>
+ Changed: The Makefiles for the library are now truly
+ parallel. To this end, the automatic generation of the files
+ <tt>forward_declarations.h</tt> in the various directories had
+ to be changed. They will now be generated automatically at the
+ end of the targets <tt>all</tt>, <tt>debug</tt> and
+ <tt>optimized</tt>. They will not be generated while building a
+ single library. In this case, <tt>make forward</tt> can be used
+ to build them manually.
+ <br>
+ I introduced separate targets for the generation of the
+ optimized versions only.
+ <br>
+ (GK 2002/04/17)
+ </p>
+
+ <li> <p>
+ New: The step-13 example program tells you something about
+ software design things for finite element programs.
+ <br>
+ (WB 2002/04/16)
+ </p>
+
+ <li> <p>
+ Changed: Due to problems with undeclared functions and general
+ compatibility concerns, <code>-ansi</code> is now no more part
+ of the compile flags for gcc.
+ <br>
+ (WB 2002/04/16)
+ </p>
+
+ <li> <p>
+ Fixed: Explicit specializations of member templates are now
+ conforming to the C++ standard. While most compilers accepted
+ the previous form, Sun's Forte compiler wants a strictly
+ conforming one.
+ <br>
+ (WB 2002/03/25)
+ </p>
+
+ <li> <p>
+ Fixed: For gcc versions that used <code
+ class="class">ostrstream</code> instead of <code
+ class="class">ostringstream</code>, it was necessary to append
+ a final <code class="member">std::ends</code> when piping text
+ into the string stream. This was not previously
+ conditionalized, but done for old and new classes.
+ <br>
+ (WB 2002/03/13)
+ </p>
+
+ <li> <p>
+ Changed: The configure machinery has been revamped
+ significantly.
+ <br>
+ (WB 2002/03/08)
+ </p>
+
+ <li> <p>
+ Added: The top-level Makefile now supports "optimized" as a
+ target that builds only optimized versions of the <code>base</code>,
+ <code>lac</code>, <code>1d</code>, <code>2d</code>, and <code>3d</code>
+ libraries.
+ <br>
+ (BK 2002/02/19)
+ </p>
+
+ <li> <p>
+ Changed: The build system was entirely revised. Object
+ files in debug mode now have the suffix <code>.g.o</code>
+ instead of <code>.go</code>. All object files from the
+ subdirectories are now placed into the <code>/lib</code>
+ top-level directory, rather than in library directories in the
+ individual subdirs.
+ <br>
+ (WB 2002/02/11)
+ </p>
+</ol>
+
+
+
+<a name="base"></a>
+<h3>base</h3>
+
+<ol>
+ <li> <p>
+ New: The <code class="class">vector2d</code> row accessor
+ classes now have member functions <code
+ class="member">begin</code> and <code class="member">end</code>
+ which allow iterating over the elements of a row of such an
+ object.
+ <br>
+ (WB 2002/05/30)
+ </p>
+
+ <li> <p>
+ New: The <code class="class">Legendre</code> and
+ <code class="class">LagrangeEquidistant</code> classes now have
+ static member functions <code
+ class="member">generate_complete_basis</code> which returns an
+ array of polynomial objects spanning the complete space up to a
+ specified order in 1d. This may be used to generate the
+ respective polynomial spaces in higher space dimensions.
+ <br>
+ (WB 2002/05/27)
+ </p>
+
+ <li> <p>
+ Changed: The <code class="class">Polynomial</code> and
+ <code class="class">LagrangeEquidistant</code> classes have lost
+ their default constructor, as that did not make much sense
+ anyway.
+ <br>
+ (WB 2002/05/27)
+ </p>
+
+ <li> <p>
+ Fixed: When forward declaring the <code
+ class="class">Tensor</code> class, we now also forward declare
+ its partial specialization for a rank one tensor. Not doing so
+ confused Sun's Forte compiler.
+ <br>
+ (WB 2002/03/22)
+ </p>
+
+ <li> <p>
+ Fixed: The class <code class="class">TensorFunction</code>
+ now uses local types <code class="class">value_type</code> and
+ <code class="class">gradient_type</code> as return values of
+ its member functions. This works around a bug in Sun's Forte
+ C++ compilers.
+ <br>
+ (WB 2002/03/20)
+ </p>
+
+ <li> <p>
+ Improved: The <code class="member">AssertThrow</code> macro now
+ uses <code class="member">__builtin_expect</code> if the
+ compiler supports this. This indicates to the compiler that we
+ expect the condition to be true and that throwing an exception
+ is a rare case. By this information, the compiler can help the
+ branch prediction unit of modern processors to better predict
+ which direction a branch will take.
+ <br>
+ (WB 2002/03/13)
+ </p>
+
+ <li> <p>
+ New: The <code class="class">vector2d</code> class now not only
+ allows access to elements through the <code
+ class="member">operator()(unsingned int,unsigned int)</code>
+ (i.e. matrix or Fortran style access), but also through nested
+ brackets via an <code class="member">operator[]</code>
+ (i.e. like to a two-dimensional C-style array).
+ <br>
+ (WB 2002/03/08)
+ </p>
+
+ <li> <p>
+ Changed: The function <code class="class">MultithreadInfo</code>::
+ <code class="member">get_n_cpus</code> now reports the proper number
+ of CPUs when running on Silicon Graphics.
+ <br>
+ (BK 2002/02/19)
+ </p>
+
+ <li> <p>
+ Changed: The quite logorrhoeic function name <code
+ class="class">TensorProductPolynomials</code>::<code
+ class="member">n_tensor_product_polynomials</code> was changed to
+ <code class="member">n</code> to be compliant wth the new class <code
+ class="class">PolynomialSpace</code>.
+ <br>
+ (GK 2002/02/11)
+ </p>
+
+ <li> <p>
+ New: The class <code class="class">PolynomialSpace</code>
+ implements the space of polynomials at most a certain degree in
+ arbitrary space dimensions.
+ <br>
+ (GK 2002/02/11)
+ </p>
+
+ <li> <p>
+ New: The function <code class="class">DataOutBase</code>::
+ <code class="member">write_tecplot_binary</code> has been
+ added. This function will write Tecplot binary files if the
+ Tecplot API is detected by ./configure. To use this feature be
+ sure that the environment variable TECHOME points to a valid
+ Tecplot installation and that the files
+ $TECHOME/include/TECIO.h and $TECHOME/lib/tecio.a exist. The
+ name of the file to be written is specified through the <code
+ class="class">DataOutBase</code> ::<code
+ class="member">TecplotFlags</code>. <code
+ class="member">tecplot_binary_file_name</code> variable. If the
+ API is not available this code simply calls the existing ASCII
+ output function.
+ <br>
+ (BK 2002/02/11)
+ </p>
+</ol>
+
+
+
+<a name="lac"></a>
+<h3>lac</h3>
+
+<ol>
+ <li> <p> Improved: <code class="class">SolverGMRES</code> allocates
+ basis vectors only, when they are needed. Therefore, it is safe
+ now to ask for a basis larger than the expected number of
+ iteration steps. On the other hand, memory allocation failures
+ may occur during the iteration now.
+ <br>
+ (GK 2002/05/24)
+ </p>
+
+ <li> <p>
+ New: Function <code
+ class="member">SparsityPattern::matrix_position</code> is the
+ inverse function for <code
+ class="member">SparsityPattern::operator()</code>.
+ <br>
+ (WB 2002/02/13)
+ </p>
+
+ <li> <p>
+ New: Functions <code
+ class="member">SparsityPattern::copy_from</code> and <code
+ class="member">SparseMatrix::copy_from</code> allow to copy a full
+ matrix into a sparse matrix.
+ <br>
+ (WB 2002/02/06)
+ </p>
+</ol>
+
+
+
+<a name="deal.II"></a>
+<h3>deal.II</h3>
+
+<ol>
+ <li> <p>
+ New: The <code class="class">GeometryInfo</code> class now
+ provides two methods,
+ <code class="member">unit_cell_vertex</code> and <code
+ class="member">vertices_adjacent_to_line</code>, that reveal
+ something about the placement and numbering of vertices on the
+ uni cell.
+ <br>
+ (GK 2002/05/29)
+ </p>
+
+ <li> <p>
+ New: The <code class="class">GridOut::</code>
+ <code class="member">write_dx</code> function is now implemented.
+ It allows to write the mesh (cells and faces) with some additional
+ information that may be useful once in a while.
+ <br>
+ (GK 2002/05/02)
+ </p>
+
+ <li> <p>
+ Fixed: The <code class="class">IteratorState::IteratorState</code>
+ enum is now called <code
+ class="class">IteratorState::IteratorStates</code>. This works
+ around a bug in Sun's Forte C++ compilers which can't handle
+ members of namespaces with the same name as the enclosing
+ namespace.
+ <br>
+ (WB 2002/03/20)
+ </p>
+
+ <li> <p>
+ Fixed: In 3d, the function <code
+ class="member">DoFTools::make_hanging_node_constraints</code>
+ contained an assertion that failed erroneously for finite
+ elements that do not have degrees of freedom on vertices. This
+ is now fixed.
+ <br>
+ (WB 2002/02/21)
+ </p>
+
+ <li> <p>
+ Fixed: <code class="member">TriaAccessor<3,3>::measure</code>
+ sometimes computed a negative value. This is now fixed.
+ <br>
+ (WB 2002/02/21)
+ </p>
+
+ <li> <p>
+ New: Finite element family with complete polynomial spaces
+ for discontinuous Galerkin: <code class="class">FE_DGP</code>
+ <br>
+ (GK 2002/02/11)
+ </p>
+</ol>
+
+<hr>
+Last update $Date$
+
+</body>
+</html>
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