What's new ?
2007/07/12 Getfem++-3.0.1. minor update
Two bugs were fixed: a memory leakage problem and a bad identification of some dofs.
2007/06/27 Getfem++-3.0 released
Getfem++ 3.0 is now available !
Not so many changes, but some of them are incompatible with getfem 2.0:
- The getfem and gmm header files have been moved into their respective subdirectories. So, as a consequence, the include directives have to be updated:
#include "gmm_xxx.h" should be replaced with #include "gmm/gmm_xxx.h"
#include "getfem_xxx.h" should be replaced with #include "getfem/getfem_xxx.h"
- The getfem interface (python and matlab) is now included in the getfem tar.gz file, in the 'interface' subdirectory. They can be enabled with the '--enable-python' or '--enable-matlab' switch of the configure script
- Some C1 composite elements have been added (triangles and quadrilaterals)
- Levelset support has been improved
2006/11/10 Getfem++-2.0.2, minor update
The GMSH mesh import has been fixed.
2006/04/06 Getfem++-2.0.1, minor update
Two bugs were fixed which could be toggled in particular conditions with nonlinear terms.
2006/03/20 Getfem++-2.0, Gmm++-2.0 and Getfem-Interface 2.0 released
This is a major update to getfem++, which make some backward-incompatible changes:
- the old mesh_fem has been split into two disjoint classes: mesh_fem which handles all that is related to FEM, and mesh_im which handles the integration methods on a mesh.
- the old getfem::getfem_mesh class has been renamed to getfem::mesh
- the "boundaries" which were attached to a mesh_fem in previous versions, are now attached to a mesh, and they are now called "regions" (because they can stored boundaries, and also sets of convexes).
- the model bricks have been reworked -- especially the Dirichlet conditions.
Some news features have been introduced in this release:
- introduction of level-set objects. Integration methods can be cut with respect to these level-set and discontinuous elements across the level-set are provided.
- parallelization of the assembly.
- interface to MUMPS.
- many news elements, Hermite and vectorial elements are now fully supported: 1D, 2D and 3D hermite, Argyris triangle, HCT triangle, RT0 and Nedelec elements are now available.
- automatic mesh refinement.
Major changes for the matlab and python interface: they follow the changes that occured in getfem. An interface to the getfem++ model bricks has been added.
Next releases of getfem++ will try to maintain backward compatability with this release.
2005/01/05 Getfem++ 1.7, Gmm++ 1.7 and Getfem-Interface 1.7 released
An important number of improvements have been done on Getfem++ 1.7. Note that the next release will be getfem 2.0, some of its changes won't maintain backward compatibility with getfem++-1.7.
- Introduction of the "model brick" system, which provides a general framework for the solution of common PDEs. Each brick is dedicated to a specific task (i.e. "handle Dirichlet conditions", "assembly of the Stokes Problem", "solve a linear system", etc.). These bricks are then connected to each other. Examples of use can be found in the "tests/" directory of getfem++.
- New models : Small strain plasticity, large strain elasticity, contact and friction conditions, linearized plates, incompressibility in small and large strain elasticity.
- Simplifications and optimizations in elementary computations.
- A direct sparse solver (SuperLU 3.0) is available "out of the box"
- Ability to export results to VTK and OpenDX.
Major changes in Gmm++ 1.7:
- New preconditionner ILUTP.
- A BFGS algorithm has been developped.
- gmm++ now handles (valid) operations mixing complex and scalars.
- gmm::real_part(V) and gmm::imag_part(V) gives a possibly writable reference on the real and imaginary part of a complex vector or matrix.
- the SuperLU interface has been updated for SuperLU 3.0.
getfem-matlab has been renamed "getfem-interface" since it now provides an interface for Matlab and Python (with the Numarray package). Note that, while it is documented and working, the python interface is still considered a "work in progress". You have to enable it explicitly with "./configure --enable-python". An example of use can be found here. An interface to the gmm++ sparse matrices and solvers is also provided.
2004/01/23 Getfem++ 1.6 and Gmm++ 1.6 released
Getfem++ 1.6 is mostly a bugfix and performance improvements release.
-
Some new integration methods were added (high order methods for
triangles such as "IM_TRIANGLE(19)" from
P. Solin, K. Segeth and I. Dolezel: "Higher-Order & Finite Element Methods", Chapman & Hall/CRC Press, 2003 ). - Performance of interpolation and geometric transformation inversion was much improved.
- Support for emc2 meshes
The Gmm++ library has been much improved version 1.6 and version 1.5. We have especially focused on its robustness.
- Many bugs were fixed, especially for complex matrices.
- QR algorithms were introduced for dense matrices.
- A LAPACK/ATLAS interface is available.
- SuperLU 2.0 interface.
- Small simplification in
linalg_traitsstructure. - Generic resize procedures for vector and matrices were introduced.
- It is possible to use a column or row matrix view of a vector with
gmm::row_vectorandgmm::col_vector. - Generic
gmm::reshapeandgmm::conjugatedfunctions. - Intensive tests with random type of matrices and vectors.