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Class OSNSMatrix

Class OSNSMatrix#

Defined in Program listing for file kernel/src/simulationTools/OSNSMatrix.hpp

class OSNSMatrix#

Interface to some specific storage types for matrices used in OneStepNSProblem.

This class is used to define an interface for various storage methods used for matrices in OneStepNSProblem. Its aim is to fill the Numerics structure NumericsMatrix, required in many XXX_problem structures of Numerics as input argument for drivers.

The idea is to remove all matrix storage management problems from OSNS classes (LCP …) and to leave it into this class.

Two main functions:

  • fill(indexSet, interactionBlocks): fill the matrix using a list of “active” Interaction, in indexSet, and a MapOfMapOfInteractionMatrices, interactionBlocks, which determines which Interaction are connected or not (ie have common DynamicalSystem).

  • convert(): fill the NumericsMatrix structure (indeed only pointers links to the components of the present class)

Note that OSNSMatrix are square.

For example, if in a LCP, constraints of interest are indexSet={inter2,inter3,inter8,inter12}, whith common DynamicalSystem between 2 and 3, 2 and 8 and 8 and 12.

interactionBlocks contains matrices for all (interi,interj) which have common DS, for (interi,interj) in I0, the set of all Interaction.

(for details on how interactionBlocks is computed see OneStepNSProblem.h).

We denote interactionBlocks[interi][interj] = mij.

Then, a call to fill(indexSet, interactionBlock) results in a matrix which looks like:

\[\begin{split} M=\left\lbrace\begin{array}{cccc} m22 & m23 & m28 & 0 \\ m32 & m33 & 0 & 0 \\ 0 & 0 & m88 & m812 \\ 0 & 0 & m128& m1212 \end{array}\right. \end{split}\]

Note: at the time the available storage types are:

  • full matrix in a SiconosMatrix (_storageType = NM_DENSE). In this case, for each call to fill(), the SiconosMatrix M is resized according to the sizes of the Interaction present in indexSet and then all the required interactionBlocks mij are COPIED into M.

  • Sparse Block Storage (_storageType = NM_SPARSE_BLOCK): corresponds to SparseBlockStructuredMatrix structure of Numerics. Only non-null interactionBlocks are saved in the matrix M and there is no copy of sub-interactionBlocks, only links thanks to pointers.

  • Sparse matrix (_storageType = NM_SPARSE): at the time of writting, only csc (compressed-sparse column). Could also be triplet (coo or coordinate) or csr (compressed-sparse row).

Subclassed by OSNSMatrixProjectOnConstraints

Public Functions

OSNSMatrix()#

Default constructor -> empty matrix.

OSNSMatrix(unsigned int n, NM_types stor)#

Constructor with _dimRow.

of the matrix

Parameters:

  • n – size of the square matrix

  • stor – storage type (NM_DENSE or NM_SPARSE_BLOCK)

OSNSMatrix(unsigned int n, unsigned int m, NM_types stor)#

Constructor with _dimRow and DimColumn of the matrix.

Parameters:

  • n – row sizes of the rectangle matrix

  • m – column size of the rectangle matrix

  • stor – storage type (NM_DENSE or NM_SPARSE_BLOCK)

OSNSMatrix(InteractionsGraph &indexSet, NM_types stor)#

Constructor from index set and map.

Parameters:

  • indexSet – InteractionsGraph* the index set of the active constraints

  • stor – storage type

OSNSMatrix(const SiconosMatrix &MSource)#

Constructor with copy of a SiconosMatrix => _storageType = NM_DENSE.

Parameters:

MSource – matrix to be copied

inline virtual ~OSNSMatrix()#

destructor

inline unsigned int size() const#

get dimension of the square matrix

Returns:

unsigned int

inline void setSize(unsigned int size)#

get dimension of the square matrix

Returns:

unsigned int

inline unsigned int sizeColumn() const#

get dimension of the square matrix

Returns:

unsigned int

inline NM_types storagetype() const#

get the type of storage for current matrix

Returns:

unsigned int

inline void setStorageType(NM_types i)#

set which type of storage will be used for current matrix

Parameters:

i – the type of storage

inline SP::NumericsMatrix numericsMatrix()#

get the numerics-readable structure

Returns:

SP::NumericsMatrix

inline SP::SiconosMatrix defaultMatrix()#

get the matrix used for default storage

Returns:

SP::NumericsMatrix

virtual void fillM(InteractionsGraph &indexSet, bool update = true)#

fill the current class using an index set

Parameters:

  • indexSet – the index set of the active constraints

  • update – if true update the size of the Matrix (default true)

void computeM(SP::NumericsMatrix Winverse, SP::NumericsMatrix H)#

Compute the M matrix given the inverse of W and H.

Parameters:

  • Winverse – the NumericsMatrix that contains the inverse of W

  • Winverse – the NumericsMatrix that contains H

virtual void fillW(DynamicalSystemsGraph &DSG, bool update = true)#

fill the current class using an index set with the W matrix of DS

Parameters:

  • DSG – the index set of the dynamicalSystems

  • update – if true update the size of the Matrix (default true)

virtual void fillWinverse(DynamicalSystemsGraph &DSG, bool update = true)#

fill the current class using an index set with the inverse of W matrix of DS

Parameters:

  • DSG – the index set of the dynamicalSystems

  • update – if true update the size of the Matrix (default true)

virtual void fillH(DynamicalSystemsGraph &DSG, InteractionsGraph &indexSet, bool update = true)#

fill the current class using an index set

Parameters:

  • DSG – the index set of the dynamicalSystems

  • indexSet – the index set of the Interactions

  • update – if true update the size of the Matrix (default true)

virtual void fillHtrans(DynamicalSystemsGraph &DSG, InteractionsGraph &indexSet, bool update = true)#

fill the current class using an index set

Parameters:

  • DSG – the index set of the dynamicalSystems

  • indexSet – the index set of the Interactions

  • update – if true update the size of the Matrix (default true)

void convert()#

fill the numerics structure _numericsMatSparse using MBlockCSR

void display() const#

display the current matrix

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