jvx.numeric

Class PnStiffMatrix

java.lang.Object

jv.object.PsObject

jvx.numeric.PnSparseMatrix

jvx.numeric.PnStiffMatrix

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, PsUpdateIf, PdMatrixIf

Direct Known Subclasses:

PnMassMatrix, PnStiffAniso, PnStiffConformal, PnStiffDiriConforming, PnStiffDiriNonConforming, PnStiffSpring

public class PnStiffMatrix
extends PnSparseMatrix

Create and setup sparse representation of a stiffness matrix.

See Also:

Serialized Form

Author:

Konrad Polthier

Version:

27.03.13, 3.10 revised (kp) Methods computeStiffnessMatrix and computeRightVector moved from retargeting workshop to this class.
10.03.05, 3.00 revised (ep) Code moved to new superclass jvx.numeric.PnSparseMatrix.
11.03.03, 2.30 revised (kh) Static methods for matrix vector multiplication add.
20.12.01, 2.20 revised (ep) Internationalization.
08.11.00, 2.10 revised (kp) Number formatting replaced with PuString from Fmt.
03.09.99, 2.00 revised (kp) Method split in subclasses.
00.00.98, 1.00 created (kp)

Field Summary

Fields

Modifier and Type	Field and Description
int	m_noe Number of elements in surface.

Fields inherited from class jvx.numeric.PnSparseMatrix

USE_LARGER_BUFFER

Fields inherited from class jv.object.PsObject

HAS_BOUNDARY_PANEL, HAS_CONFIG_PANEL, HAS_INFO_PANEL, HAS_LABEL_PANEL, HAS_MATERIAL_PANEL, HAS_TEXTURE_PANEL, HAS_VECTOR_PANEL, INSPECTOR_INFO, INSPECTOR_INFO_EXT, IS_DELETED, IS_FIXED, IS_FOCUSSED, IS_PICKED, IS_SELECTED, IS_USED, NUM_TAGS

Constructor Summary

Constructors

Constructor and Description
PnStiffMatrix(PgElementSet surface)

Method Summary

Modifier and Type	Method and Description
static PdVector	computeRightVector(PgElementSet geom, PgVectorField field, boolean conforming, boolean rotateGradient, PdVector weights) Evaluate the right vector of the equations system Laplace(u) = div(K).
static PnSparseMatrix	computeStiffnessMatrix(PgElementSet geom, boolean conforming, PdVector weights) Compute the entries of the stiffness matrix either conforming or non-conforming.
void	init(PgElementSet surface) Initializes the stiffness matrix by computing the index vector and matrix entries.
void	init(PgElementSet domain, PgElementSet surface) Initializes the stiffness matrix by computing the index vector and matrix entries.

Methods inherited from class jvx.numeric.PnSparseMatrix

add, add, addDiagonal, addDiagonal, addEntry, addNew, appendEntry, clear, clearColumn, clearRow, compress, concatMatrices, copy, copyNew, deleteColumn, deleteRow, extractRows, getColIndex, getColIndices, getColIndices, getDiagIndex, getEntries, getEntries, getEntry, getEntrySparse, getIndex, getNumCols, getNumEntries, getNumEntries, getNumRows, isEqualTo, isSquare, leftMultMatrix, leftMultVector, leftMultVector, leftMultVector, leftMultVector, multMatrices, multQuadratic, multScalar, multScalar, removeZeros, rightMultMatrix, rightMultVector, rightMultVector, rightMultVector, rightMultVector, setEntry, setEntrySparse, setNumEntries, setRow, setSize, setSize, setSize, sortEntries, sub, subNew, toPdMatrix, toShortString, toString, transpose, transpose, transposeNew, transposeNew, validate, vstackSparseMatrices

Methods inherited from class jv.object.PsObject

addInspector, addUpdateListener, assureInspector, clearTag, clone, clone, clone, copy, getFather, getInfoPanel, getInspector, getName, getNumObjects, getSymbol, hasInspector, hasTag, hasUpdateListener, init, instanceOf, instanceOf, newInspector, newInspector, removeInspector, removeInspector, removeUpdateListener, setName, setParent, setSymbol, setTag, update, updatePanels

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

m_noe

public int m_noe

Number of elements in surface.

Constructor Detail

PnStiffMatrix

public PnStiffMatrix(PgElementSet surface)

Method Detail

init

public void init(PgElementSet surface)

Initializes the stiffness matrix by computing the index vector and matrix entries. Method can be used to reset the stiffness matrix. All memory allocation is done in constructor.

init

public void init(PgElementSet domain,
                 PgElementSet surface)

Initializes the stiffness matrix by computing the index vector and matrix entries. Method can be used to reset the stiffness matrix. All memory allocation is done in constructor.

computeStiffnessMatrix

public static PnSparseMatrix computeStiffnessMatrix(PgElementSet geom,
                                                    boolean conforming,
                                                    PdVector weights)

Compute the entries of the stiffness matrix either conforming or non-conforming.

Parameters:

conforming - Specifies whether the matrix works on conforming or non-conforming maps.

weights - Weights for each triangle. May be null.

Author:

Matthias Nieser

Version:

27.03.13, 2.00 created (kp) Method moved from retargeting workshop to this class.
09.09.11, 1.10 revised (mn) Added weights parameter.
25.02.11, 1.00 created (mn) Created from PnStiffMatrixOnCovering.computeStiffnessMatrix().

computeRightVector

public static PdVector computeRightVector(PgElementSet geom,
                                          PgVectorField field,
                                          boolean conforming,
                                          boolean rotateGradient,
                                          PdVector weights)

Evaluate the right vector of the equations system Laplace(u) = div(K). TODO: this method requires element normals, must be avoid and intrinsic rotation used TODO: place of this method must be re-thought!

Parameters:

geom - Geometry to work on.

field - Given vector field.

conforming - Whether the energy should operate on the set of

weights - Weights for each triangle. May be null.

Author:

Matthias Nieser

Version:

27.03.13, 2.00 created (kp) Method moved from retargeting workshop to this class.
09.09.11, 1.10 revised (mn) Added weights parameter.
25.02.11, 1.00 created (mn) Created from PnStiffMatrixOnCovering.computeRightVector.