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(FemElement3dBase e) Initializes empty cache

Method Summary

Modifier and Type	Method and Description
void	addInitialMembraneStiffness(ShellElement3d e, AuxiliaryMaterial mat, double weight)
void	addInitialMembraneStiffness(ShellElement3d e, FemMaterial mat, double weight)
void	addInitialShellStiffness(ShellElement3d e, AuxiliaryMaterial mat, double weight)
void	addInitialShellStiffness(ShellElement3d e, FemMaterial mat, double weight)
void	addInitialStiffness(FemElement3d e, AuxiliaryMaterial mat, double weight) Computes and stores the initial stiffness K00 and force f0 terms
void	addInitialStiffness(FemElement3d e, FemMaterial mat, double weight) Computes and stores the initial stiffness K00 and force f0 terms
void	addInitialStiffness(ShellElement3d e, AuxiliaryMaterial mat, double weight) Computes and stores the initial stiffness K00 and force f0 terms
void	addInitialStiffness(ShellElement3d e, FemMaterial mat, double weight) Computes and stores the initial stiffness K00 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	getInitialBackForce(int i)
Vector3d	getInitialForce(int i) Retrieves the stiffness-induced initial force on node i
Matrix3d	getInitialStiffness00(int i, int j) Retrieves the K00 contribution between nodes i and j
Matrix3d	getInitialStiffness01(int i, int j) Retrieves the K01 contribution between nodes i and j
Matrix3d	getInitialStiffness10(int i, int j) Retrieves the K10 contribution between nodes i and j
Matrix3d	getInitialStiffness11(int i, int j) Retrieves the K00 contribution between nodes i and j
boolean	hasShellData()
double	maxDistance(LinearMaterialCache cache)
void	mulAddK(int i, int j, Vector3d r0, Vector3d x0)
void	mulAddK(int i, int j, Vector3d r0, Vector3d r1, Vector3d x0, Vector3d x1)

Methods inherited from class java.lang.Object

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

Constructor Detail

LinearMaterialCache

public LinearMaterialCache(FemElement3dBase e)

Initializes empty cache

Method Detail

hasShellData

public boolean hasShellData()

clearInitialStiffness

public void clearInitialStiffness()

Sets all stiffness and force values to zero

addInitialStiffness

public void addInitialStiffness(FemElement3d e,
                                FemMaterial mat,
                                double weight)

Computes and stores the initial stiffness K00 and force f0 terms

Parameters:

e - element

mat - linear material

weight - weight to combine with integration point weights

addInitialStiffness

public void addInitialStiffness(ShellElement3d e,
                                FemMaterial mat,
                                double weight)

Computes and stores the initial stiffness K00 and force f0 terms

Parameters:

e - element

mat - linear material

weight - weight to combine with integration point weights

addInitialShellStiffness

public void addInitialShellStiffness(ShellElement3d e,
                                     FemMaterial mat,
                                     double weight)

addInitialMembraneStiffness

public void addInitialMembraneStiffness(ShellElement3d e,
                                        FemMaterial mat,
                                        double weight)

addInitialStiffness

public void addInitialStiffness(FemElement3d e,
                                AuxiliaryMaterial mat,
                                double weight)

Computes and stores the initial stiffness K00 and force f0 terms

Parameters:

e - element

mat - linear material

weight - weight to combine with integration point weights

addInitialStiffness

public void addInitialStiffness(ShellElement3d e,
                                AuxiliaryMaterial mat,
                                double weight)

Computes and stores the initial stiffness K00 and force f0 terms

Parameters:

e - element

mat - linear material

weight - weight to combine with integration point weights

addInitialShellStiffness

public void addInitialShellStiffness(ShellElement3d e,
                                     AuxiliaryMaterial mat,
                                     double weight)

addInitialMembraneStiffness

public void addInitialMembraneStiffness(ShellElement3d e,
                                        AuxiliaryMaterial mat,
                                        double weight)

getInitialStiffness00

public Matrix3d getInitialStiffness00(int i,
                                      int j)

Retrieves the K00 contribution between nodes i and j

Parameters:

i - first node index

j - second node index

Returns:

local stiffness contribution

getInitialStiffness01

public Matrix3d getInitialStiffness01(int i,
                                      int j)

Retrieves the K01 contribution between nodes i and j

Parameters:

i - first node index

j - second node index

Returns:

local stiffness contribution

getInitialStiffness10

public Matrix3d getInitialStiffness10(int i,
                                      int j)

Retrieves the K10 contribution between nodes i and j

Parameters:

i - first node index

j - second node index

Returns:

local stiffness contribution

getInitialStiffness11

public Matrix3d getInitialStiffness11(int i,
                                      int j)

Retrieves the K00 contribution between nodes i and j

Parameters:

i - first node index

j - second node index

Returns:

local stiffness contribution

mulAddK

public void mulAddK(int i,
                    int j,
                    Vector3d r0,
                    Vector3d x0)

mulAddK

public void mulAddK(int i,
                    int j,
                    Vector3d r0,
                    Vector3d r1,
                    Vector3d x0,
                    Vector3d x1)

getInitialForce

public Vector3d getInitialForce(int i)

Retrieves the stiffness-induced initial force on node i

Parameters:

i - node index

Returns:

force vector

getInitialBackForce

public Vector3d getInitialBackForce(int i)

equals

public boolean equals(LinearMaterialCache cache)

epsilonEquals

public boolean epsilonEquals(LinearMaterialCache cache,
                             double eps)

maxDistance

public double maxDistance(LinearMaterialCache cache)