jvx.numeric
Class PnVolumeEnergy

java.lang.Object
  jv.object.PsObject
      jvx.numeric.PnFunction
          jvx.numeric.PnEnergy
              jvx.numeric.PnVolumeEnergy

All Implemented Interfaces:

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

public class PnVolumeEnergy

extends PnEnergy

Volume energy is the difference of the oriented volume of a surface with a given constant. The volume of a surface is defined as the volume of the cone of the surface over its origin. This class includes gradient and hessian computations. Domain geometry may be missing.

See Also:

Serialized Form

Field Summary

Fields inherited from class jv.object.PsObject

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

PnVolumeEnergy()

Method Summary

double	eval(PdVector coord) Compute area energy of a coord vector using newly initialized stiffness matrix.
PdVector	evalGradient(PdVector coord, PdVector gradient) Evaluate volume gradient of a coord vector.
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

evalHessian, getNumOfVariables, getSpectrum, getZeroGradientAtBounds, isEnabledConstrainMatrix, setEnabledConstrainMatrix, 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

PnVolumeEnergy

public PnVolumeEnergy()

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

eval

public double eval(PdVector coord)

Compute area energy of a coord vector using newly initialized stiffness matrix. Method uses the array m_store for intermediate storage and modifies its entries.

Overrides:

eval in class PnEnergy

Parameters:

coord - Coordinate vector with list of doubles

Returns:

double Energy of coordinate vector

See Also:

PnEnergy

evalGradient

public PdVector evalGradient(PdVector coord,
                             PdVector gradient)

Evaluate volume gradient of a coord vector.

Overrides:

evalGradient in class PnEnergy

Parameters:

coord - Coordinate vector with list of doubles

gradient - Gradient vector to be modified

See Also:

PnEnergy