\anchor OverlapDEC-det
\class OverlapDEC
+ \section OverlapDEC-over Overview
+
The \c OverlapDEC enables the \ref InterpKerRemapGlobal "conservative remapping" of fields between
two parallel codes. This remapping is based on the computation of intersection volumes on
- a \b same \b processor \b group. On this processor group are defined two field-templates called A
+ a \b single \b processor \b group. On this processor group are defined two field-templates called A
and B. The computation is possible for 3D meshes, 2D meshes, 3D-surface meshes, 1D meshes and
2D-curve meshes. Dimensions must be similar for the distribution templates A and B.
- The main difference with \ref InterpKernelDEC-det is that this \ref para-dec "DEC" manages 2 field templates
- on each processor of the processor group (A and B) called source and target.
- Furthermore all processors in processor group cooperates in global interpolation matrix
- computation. In this respect \ref InterpKernelDEC is a specialization of \c OverlapDEC.
- \section ParaMEDMEMOverlapDECAlgorithmDescription Algorithm Description
+ The main difference with \ref InterpKernelDEC-det "InterpKernelDEC" is that this
+ \ref para-dec "DEC" works with a *single* processor group, in which processors will share the work.
+ Consequently each processor manages two \ref MEDCouplingFieldTemplatesPage "field templates" (A and B)
+ called source and target.
+ Furthermore all processors in the processor group cooperate in the global interpolation matrix
+ computation. In this respect \c InterpKernelDEC is a specialization of \c OverlapDEC.
+
+ \section ParaMEDMEMOverlapDECAlgorithmDescription Algorithm description
Let's consider the following use case that is ran in ParaMEDMEMTest_OverlapDEC.cxx to describes
the different steps of the computation. The processor group contains 3 processors.
\anchor ParaMEDMEMOverlapDECImgTest1
- \image html OverlapDEC1.png "Example showing the use case in order to explain the different steps."
+ \image html OverlapDEC1.png "Example split of the source and target mesh among the 3 procs"
\subsection ParaMEDMEMOverlapDECAlgoStep1 Step 1 : Bounding box exchange and global interaction
between procs computation.
the \b local TODO list per proc is expected to
be as well balanced as possible.
- The interpolation is performed as \ref ParaMEDMEM::MEDCouplingRemapper "Remapper" does.
+ The interpolation is performed as the \ref ParaMEDMEM::MEDCouplingRemapper "remapper" does.
This operation is performed by OverlapInterpolationMatrix::addContribution method.
