artisynth.core.femmodels

Class LinearMaterialCache

java.lang.Object

artisynth.core.femmodels.LinearMaterialCache

public class LinearMaterialCache
extends java.lang.Object

Cached stiffness and initial force terms for faster linear material computations.

Constructor Summary

Constructors

Constructor and Description
LinearMaterialCache(int numNodes) Initializes empty cache

Method Summary

Modifier and Type	Method and Description
void	addInitialStiffness(FemElement3d e, AuxiliaryMaterial mat) Computes and stores the initial stiffness K0 and force f0 terms
void	addInitialStiffness(FemElement3d e, FemMaterial mat) Computes and stores the initial stiffness K0 and force f0 terms
void	clearInitialStiffness() Sets all stiffness and force values to zero
boolean	epsilonEquals(LinearMaterialCache cache, double eps)
boolean	equals(LinearMaterialCache cache)
Vector3d	getInitialForce(int i) Retrieves the stiffness-induced initial force on node i
Vector3d[]	getInitialForces() Retries all stiffness-induced initial forces
Matrix3d[][]	getInitialStiffness() Retrieves all local stiffness contributions
Matrix3d	getInitialStiffness(int i, int j) Retrieves the local stiffness contribution between nodes i and j
double	maxDistance(LinearMaterialCache cache)

Methods inherited from class java.lang.Object

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

Constructor Detail

LinearMaterialCache

public LinearMaterialCache(int numNodes)

Initializes empty cache

Parameters:

numNodes - number of nodes in associated element

Method Detail

clearInitialStiffness

public void clearInitialStiffness()

Sets all stiffness and force values to zero

addInitialStiffness

public void addInitialStiffness(FemElement3d e,
                                FemMaterial mat)

Computes and stores the initial stiffness K0 and force f0 terms

Parameters:

e - element

mat - linear material

addInitialStiffness

public void addInitialStiffness(FemElement3d e,
                                AuxiliaryMaterial mat)

Computes and stores the initial stiffness K0 and force f0 terms

Parameters:

e - element

mat - linear material

getInitialStiffness

public Matrix3d getInitialStiffness(int i,
                                    int j)

Retrieves the local stiffness contribution between nodes i and j

Parameters:

i - first node index

j - second node index

Returns:

local stiffness contribution

getInitialStiffness

public Matrix3d[][] getInitialStiffness()

Retrieves all local stiffness contributions

Returns:

K0

getInitialForce

public Vector3d getInitialForce(int i)

Retrieves the stiffness-induced initial force on node i

Parameters:

i - node index

Returns:

force vector

getInitialForces

public Vector3d[] getInitialForces()

Retries all stiffness-induced initial forces

Returns:

f0

equals

public boolean equals(LinearMaterialCache cache)

epsilonEquals

public boolean epsilonEquals(LinearMaterialCache cache,
                             double eps)

maxDistance

public double maxDistance(LinearMaterialCache cache)