jvx.numeric
Class PnDiriEnergy

java.lang.Object
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  +--jv.object.PsObject
        |
        +--jvx.numeric.PnFunction
              |
              +--jvx.numeric.PnEnergy
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                    +--jvx.numeric.PnDiriEnergy

All Implemented Interfaces:

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

Direct Known Subclasses:

PnHodgeU, PnHodgeW

public class PnDiriEnergy

extends PnEnergy

Dirichlet energy including gradient and hessian computations.

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)

Author:

Konrad Polthier

See Also:

Serialized Form

Fields inherited from class jv.object.PsObject

HAS_CONFIG_PANEL, HAS_INFO_PANEL, HAS_MATERIAL_PANEL, HAS_TEXTURE_PANEL, INSPECTOR_INFO, INSPECTOR_INFO_EXT, IS_DELETED, IS_FIXED, IS_SELECTED, IS_USED, NUM_TAGS

Constructor Summary

PnDiriEnergy()

Method Summary

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

eval, evalGradient, getNumOfVariables, getSpectrum, getZeroGradientAtBounds, 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, hasInspector, hasTag, hasUpdateListener, instanceOf, instanceOf, removeInspector, removeUpdateListener, setName, setParent, 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

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 Dirichlet energy

coord - Coordinate vector with list of doubles

Returns:

Hessian of Dirichlet energy

See Also:

vgp.discrete.harmonic.PnDiriEnergy