jvx.numeric

Class PnDiriEnergy

java.lang.Object

jv.object.PsObject

jvx.numeric.PnFunction

jvx.numeric.PnEnergy

jvx.numeric.PnDiriEnergy

All Implemented Interfaces:

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

Direct Known Subclasses:

PnAreaVolEnergy, PnHodgeU, PnHodgeW

public class PnDiriEnergy
extends PnEnergy

Dirichlet energy including gradient and hessian computations.

See Also:

Serialized Form

Author:

Konrad Polthier

Version:

06.06.99, 2.00 revised (kp) Now a subclass of PnEnergy.
17.04.99, 1.01 revised (kp) Method 'evalGradient' moved from class PnDiriGradient.
16.12.97, 1.00 created (kp)

Field Summary

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
PnDiriEnergy()

Method Summary

Modifier and Type	Method and Description
PdMatrix	evalHessian(PdMatrix hessian) Compute full hessian of Diri energy of a coord vector using the stiffness matrix.
void	init() If instance has missing name then assign default name 'Object_NUMBER' where number is the total number of already created instances.
void	initSurface(PgElementSet domain, PgElementSet surface) Method called from energyMinimizer.minimizeStep() to update the stiffness matrix after conjugate gradient method has returned.
boolean	setSurface(PgElementSet domain, PgElementSet surface) Set domain and surface, and initialize energy structure.

Methods inherited from class jvx.numeric.PnEnergy

computeNormalizedHessian, eval, evalGradient, getConstrain, getNumOfVariables, getSpectrum, getZeroGradientAtBounds, isEnabledConstrainMatrix, isUseConstrainMatrix, setConstrain, setEnabledConstrainMatrix, setUseConstrainMatrix, setZeroGradientAtBounds, testEigenvalues

Methods inherited from class jvx.numeric.PnFunction

enableEvaluation, isEvaluable

Methods inherited from class jv.object.PsObject

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

Methods inherited from class java.lang.Object

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

Constructor Detail

PnDiriEnergy

public PnDiriEnergy()

Method Detail

init

public void init()

Description copied from class: PsObject

If instance has missing name then assign default name 'Object_NUMBER' where number is the total number of already created instances.

Overrides:

init in class PnEnergy

initSurface

public void initSurface(PgElementSet domain,
                        PgElementSet surface)

Method called from energyMinimizer.minimizeStep() to update the stiffness matrix after conjugate gradient method has returned. E.g. PnDiriEnergy should copy surface into domain if in iteration mode i.e. if dimension of domain and surface are equal.

Overrides:

initSurface in class PnEnergy

setSurface

public boolean setSurface(PgElementSet domain,
                          PgElementSet surface)

Set domain and surface, and initialize energy structure. Method is called from outside whenever domain or surface has been updated.

Overrides:

setSurface in class PnEnergy

Parameters:

domain - additional geometry used to specify maps

surface - geometry which is usually optimized

evalHessian

public PdMatrix evalHessian(PdMatrix hessian)

Compute full hessian of Diri energy of a coord vector using the stiffness matrix. If argument is null, then a new matrix of full size is created and returned. Size of argument is enlarged if necessary. Boundary and deleted vertices are not considered.

Overrides:

evalHessian in class PnEnergy

Parameters:

hessian - Empty hessian of energy

Returns:

Hessian of energy

Author:

Konrad Polthier

Version:

17.04.99, 1.01 revised (kp)
17.04.99, 1.00 created (kp)