vgp.surface.common

Class PgSurface_Zoll

java.lang.Object

jv.object.PsObject

jvx.surface.PgDomainDescr

vgp.surface.common.PgSurfaceDescr

vgp.surface.common.PgSurface_Zoll

All Implemented Interfaces:

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

public class PgSurface_Zoll
extends PgSurfaceDescr

Computes rotational symmetric Zoll surface. All geodesics are closed after once running around the surface and all geodesics have same length 2Pi.

Parametrized surface given by method, or interactively, by function expressions. If the functions of a surface are specified in calc_f method and, later, interactively edited, then the interactive expressions are further used. This is important for evaluation of higher order differentials since they are only approximated using finite differences in the later case.

See Also:

PgSurfaceDescr, Serialized Form

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
PgSurface_Zoll()

Method Summary

Methods

Modifier and Type	Method and Description
boolean	calc_f(PdVector fun, double u, double v) Internal function called by eval(..) to compute function value.
void	init() Initialize and reset data structure and all instance variables.
boolean	isUPeriodic() Determine if surface is periodic in u-direction.
boolean	polint(double[] xa, double[] ya, int off, int n, double x, double[] y, double[] c, double[] d)
double	qromb(double a, double b)
double	trapzd(double a, double b, int n)
boolean	update(java.lang.Object event) Catch events from function strings.

Methods inherited from class vgp.surface.common.PgSurfaceDescr

addParameter, christoffel, clone, copy, ddf_dUdU, ddf_dUdV, ddf_dVdV, df_dU, df_dV, df, dN_dU, dN_dV, dN, eval, firstFundamental, getAmbientProjection, getAmbientSpace, getDimOfSurface, getFunction, getListOfScenes, getListOfSurfaces, getParameter, getParameters, isVPeriodic, normal, secondFundamental, setAmbientProjection, setAmbientSpace, setDimOfSurface, setFunction, useFunctionExpression, useFunctionExpression, weingarten

Methods inherited from class jvx.surface.PgDomainDescr

eval, getNameOfLines, getNumULines, getNumVLines, getUMax, getUMin, getVMax, getVMin, isShowingULine, isShowingVLine, setDiscr, setDiscrBounds, setMaxSize, setNameOfLines, setNumULines, setNumVLines, setSize, setUMax, setUMin, setVMax, setVMin, showULine, showVLine, toString

Methods inherited from class jv.object.PsObject

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

Methods inherited from class java.lang.Object

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

Constructor Detail

PgSurface_Zoll

public PgSurface_Zoll()

Method Detail

init

public void init()

Description copied from class: PgDomainDescr

Initialize and reset data structure and all instance variables.

Overrides:

init in class PgSurfaceDescr

update

public boolean update(java.lang.Object event)

Description copied from class: PgSurfaceDescr

Catch events from function strings. Update the class whenever a child has changed. Method is usually invoked from the children.

Specified by:

update in interface PsUpdateIf

Overrides:

update in class PgSurfaceDescr

Parameters:

event - carries a lot of information

Returns:

true if event has been handled, otherwise false

See Also:

PsObject.setParent(PsUpdateIf), PsObject.getFather(), PsObject.addUpdateListener(PsUpdateIf)

isUPeriodic

public boolean isUPeriodic()

Description copied from class: PgSurfaceDescr

Determine if surface is periodic in u-direction. This method returns false, but will be overwritten by surface which are periodic.

Overrides:

isUPeriodic in class PgSurfaceDescr

calc_f

public boolean calc_f(PdVector fun,
             double u,
             double v)

Description copied from class: PgSurfaceDescr

Internal function called by eval(..) to compute function value. It is ensured by the calling eval() function that argument vector exists and has correct size.

If function set flag m_bUseFunctionExpression==false then we use this indicator that function has not been overridden and use the string functions.

This function must be overwritten by subclasses to compute surfaces, for example, if a subclass wants to perform the function calculation itself.

Overrides:

calc_f in class PgSurfaceDescr

Parameters:

fun - vector where to place the function values.

Returns:

true if function has been overridden and evaluated successfully.

See Also:

PgSurfaceDescr.eval(PdVector, double, double)

qromb

public double qromb(double a,
           double b)

trapzd

public double trapzd(double a,
            double b,
            int n)

polint

public boolean polint(double[] xa,
             double[] ya,
             int off,
             int n,
             double x,
             double[] y,
             double[] c,
             double[] d)

Parameters:

xa - given argument array

ya - given values

off - offset index into xa and ya

n - number of given pairs (xa, ya) counting from off position

x - argument where to evaluate

y - contains computed values of y and dy.

c - array passed as arg to avoid repeated allocation

d - array passed as arg to avoid repeated allocation