The class contains the addressing required by the lduMatrix: upper, lower and losort. More...
#include <OpenFOAM/lduAddressing.H>
The class contains the addressing required by the lduMatrix: upper, lower and losort.
The addressing can be created in two ways: either with references to upper and lower in which case it stores references or from labelLists, in which case it stores the addressing itself. Additionally, the losort addressing belongs to the class is as on lazy evaluation.
The ordering of owner addresses is such that the labels are in increasing order, with groups of identical labels for edges "owned" by the same point. The neighbour labels are also ordered in ascending order but only for groups of edges belonging to each point. An example is given below:
owner eighbour 0 1 0 20 1 2 1 21 2 3 2 22 3 4 3 23 4 5 4 24 5 6 5 25 6 7 6 26 7 8 7 27 8 9 8 28 9 10 9 29
There exists an alternative way of addressing the owner list: instead of repeating the same label in the owner list, it is possible to address the start of each point neighbours in the neighbour list. This reduces the size of owner addressing from a list over all edges to a list over all points + 1:
Owner start list: 0 2 4 6 8 10 12 14 16 18
We shall use the second form of the addressing for fast lookup of edge label from the known owner and neighbour, using the following algorithm:
While owner start addressing allows us to find the edge owned by the points, it is also necessary to find the edges for which the point is a neighbour. Losort addressing lists the edges neighboured by the point and we shall use the same trick as above to address into this list. Thus, for every point the losort start gives the address of the first face to neighbour this point.
Definition at line 111 of file lduAddressing.H.
Public Member Functions | |
lduAddressing (const label nEqns) | |
virtual | ~lduAddressing () |
label | size () const |
Return number of equations.
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virtual const unallocLabelList & | lowerAddr () const =0 |
Return lower addressing.
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virtual const unallocLabelList & | upperAddr () const =0 |
Return upper addressing.
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virtual const unallocLabelList & | patchAddr (const label patchNo) const =0 |
Return patch to internal addressing given patch number.
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virtual const lduSchedule & | patchSchedule () const =0 |
const unallocLabelList & | losortAddr () const |
Return losort addressing.
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const unallocLabelList & | ownerStartAddr () const |
Return owner start addressing.
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const unallocLabelList & | losortStartAddr () const |
Return losort start addressing.
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label | triIndex (const label a, const label b) const |
Return off-diagonal index given owner and neighbour label.
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lduAddressing | ( | const label | nEqns ) | [inline]
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Definition at line 152 of file lduAddressing.H.
~lduAddressing | ( | ) | [virtual]
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Definition at line 174 of file lduAddressing.C.
References Foam::deleteDemandDrivenData().
label size | ( | ) | const [inline]
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Return number of equations.
Definition at line 169 of file lduAddressing.H.
Referenced by pairGAMGAgglomeration::agglomerate(), GAMGAgglomeration::agglomerateLduAddressing(), and LUscalarMatrix::LUscalarMatrix().
virtual const unallocLabelList& lowerAddr | ( | ) | const [pure virtual]
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Return lower addressing.
Implemented in fvMeshLduAddressing, and lduPrimitiveMesh.
Referenced by pairGAMGAgglomeration::agglomerate(), GAMGAgglomeration::agglomerateLduAddressing(), DILUPreconditioner::calcReciprocalD(), DICPreconditioner::calcReciprocalD(), lduMatrix::H(), fvMesh::owner(), and lduMatrix::sumDiag().
virtual const unallocLabelList& upperAddr | ( | ) | const [pure virtual]
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Return upper addressing.
Implemented in fvMeshLduAddressing, and lduPrimitiveMesh.
Referenced by pairGAMGAgglomeration::agglomerate(), GAMGAgglomeration::agglomerateLduAddressing(), DILUPreconditioner::calcReciprocalD(), DICPreconditioner::calcReciprocalD(), lduMatrix::H(), fvMesh::neighbour(), GaussSeidelSmoother::smooth(), and lduMatrix::sumDiag().
virtual const unallocLabelList& patchAddr | ( | const label | patchNo ) | const [pure virtual]
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Return patch to internal addressing given patch number.
Implemented in fvMeshLduAddressing, and lduPrimitiveMesh.
virtual const lduSchedule& patchSchedule | ( | ) | const [pure virtual]
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Implemented in fvMeshLduAddressing, and lduPrimitiveMesh.
Referenced by GAMGAgglomeration::agglomerateLduAddressing(), and lduMatrix::patchSchedule().
const Foam::unallocLabelList & losortAddr | ( | ) | const |
Return losort addressing.
Definition at line 184 of file lduAddressing.C.
const Foam::unallocLabelList & ownerStartAddr | ( | ) | const |
Return owner start addressing.
Definition at line 195 of file lduAddressing.C.
Referenced by GaussSeidelSmoother::smooth().
const Foam::unallocLabelList & losortStartAddr | ( | ) | const |
Return losort start addressing.
Definition at line 206 of file lduAddressing.C.
Foam::label triIndex | ( | const label | a, |
const label | b | ||
) | const |
Return off-diagonal index given owner and neighbour label.
Definition at line 218 of file lduAddressing.C.
References Foam::abort(), Foam::FatalError, FatalErrorIn, Foam::max(), and Foam::min().