objects
Class EuRadius

java.lang.Object
  |
  +--objects.EuObject
        |
        +--objects.EuRadius

All Implemented Interfaces:

java.lang.Cloneable

public class EuRadius

extends EuObject

An instance of this class represents a radius, i.e. a nonnegative integer which can be used to form circles.

Field Summary

fundamentals.EuReal

radius A floating point representation of the radius

Fields inherited from class objects.EuObject

infoHash, provenience, scaledown

Constructor Summary

EuRadius()
Constructor for dummy object.

EuRadius(double r)
The constructor checks that the radius is indeed a nonnegative integer.

EuRadius(objects.EuPoint p1, objects.EuPoint p2)
The radius is instantiated as the distance between the two given points

EuRadius(fundamentals.mouseInfo info, java.util.Random croupier)
Constructed randomly, via mouseInfo.

Method Summary

fundamentals.EuVector	atParameter(double t) Call has no meaning, return (1,0)
boolean	castIdentical(objects.EuObject other) Return true if passed object is a EuRadius with the same radius parameter.
double	closestParameter(double x, double y) Return zero as dummy value.
boolean	closureContains(fundamentals.EuVector point) Returns false as radii have no closure points.
protected objects.plotCollection	computeClip(fundamentals.mouseInfo info) Draw an oval with the radius centered at the top left corner.
double	confusionDistance(objects.EuObject other) Returns the distance from this object to another under these simplifications: The distance to lines or circles is in {0,POSITIVE_INFINITY} unless this is a point.
double	distance(fundamentals.EuVector point) Return POSITIVE_INFINITY as dummy value.
boolean	interiorContains(fundamentals.EuVector point) Returns false as radii have no interior points.
boolean	isFull() Determine whether object is a subobject of another.
boolean	mouseVicinity(fundamentals.mouseVector mouseAt, fundamentals.mouseInfo info) Determine whether mouse position is close to displayed object
double	nameDisplacementAngle(fundamentals.mouseInfo info) Describe nameDisplacementAngle method here.
fundamentals.EuVector	nameLocation(fundamentals.mouseInfo info) Describe nameLocation method here.
boolean	overlaps(objects.EuObject other) Determine whether objects overlap.
java.lang.String	params() Generate a mathematical specification of parameters associated to the object
void	passArguments(fundamentals.EuArguments args) Read off parameters describing the object and add to passed EuArguments instance
java.lang.String	toNaturalLanguage(int language, boolean determined) Generate a description of the object in a natural language (Danish or English)
java.lang.String	toString() Generate a mathematical specification of the object
char	typeName() Return R for radius.

Methods inherited from class objects.EuObject

cloneObject, draw, equals, getClip, isVisible, mouseVicinity, toPs

Methods inherited from class java.lang.Object

clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

radius

public fundamentals.EuReal radius

A floating point representation of the radius

Constructor Detail

EuRadius

public EuRadius(double r)
         throws DesignException,
                UserException

The constructor checks that the radius is indeed a nonnegative integer. A zero radius leads to a warning.

Parameters:

r - the radius

Throws:

DesignException - if an error occurs

UserException - if an error occurs

EuRadius

public EuRadius()

Constructor for dummy object.

EuRadius

public EuRadius(fundamentals.mouseInfo info,
                java.util.Random croupier)
         throws UserException

Constructed randomly, via mouseInfo. No error possibilities.

Parameters:

info - the mouseinfo, used in deciding what range to draw random anchor point from

croupier - the random number generator to use

Throws:

UserException - if an error occurs

EuRadius

public EuRadius(objects.EuPoint p1,
                objects.EuPoint p2)
         throws UserException

The radius is instantiated as the distance between the two given points

Parameters:

p1 - an EuPoint value

p2 - an EuPoint value

Throws:

UserException - if an error occurs

Method Detail

atParameter

public fundamentals.EuVector atParameter(double t)

Call has no meaning, return (1,0)

Parameters:

t - ignored

Returns:

null vector

computeClip

protected objects.plotCollection computeClip(fundamentals.mouseInfo info)
                                      throws UserException,
                                             DesignException

Draw an oval with the radius centered at the top left corner.

Specified by:

computeClip in class EuObject

Parameters:

info - information used in scaling and positioning the object

Returns:

a plotCollection value

Throws:

UserException - if an error occurs

DesignException - if an error occurs

mouseVicinity

public boolean mouseVicinity(fundamentals.mouseVector mouseAt,
                             fundamentals.mouseInfo info)

Determine whether mouse position is close to displayed object

Overrides:

mouseVicinity in class EuObject

Parameters:

mouseAt - The coordinates of the mouse position

info - information used in locating the object on screen

Returns:

true if mouse is close

castIdentical

public boolean castIdentical(objects.EuObject other)

Return true if passed object is a EuRadius with the same radius parameter.

Specified by:

castIdentical in class EuObject

Parameters:

other - the object being compared to the present one

Returns:

true if passed object is a EuRadius with the same radius parameter.

interiorContains

public boolean interiorContains(fundamentals.EuVector point)

Returns false as radii have no interior points.

Specified by:

interiorContains in class EuObject

Parameters:

point - an EuVector value

Returns:

false

closureContains

public boolean closureContains(fundamentals.EuVector point)

Returns false as radii have no closure points.

Specified by:

closureContains in class EuObject

Parameters:

point - an EuVector value

Returns:

false

overlaps

public boolean overlaps(objects.EuObject other)

Determine whether objects overlap. Radii are said to overlap with other radii, but not with other objects.

Specified by:

overlaps in class EuObject

Parameters:

other - the object being compared to the present one

Returns:

true if passed object is a EuRadius

closestParameter

public double closestParameter(double x,
                               double y)

Return zero as dummy value.

Parameters:

x - the first coordinate of the point

y - the second coordinate of the point

Returns:

zero

distance

public double distance(fundamentals.EuVector point)

Return POSITIVE_INFINITY as dummy value.

Specified by:

distance in class EuObject

Parameters:

point - the point

Returns:

Double.POSITIVE_INFINITY

confusionDistance

public double confusionDistance(objects.EuObject other)

Returns the distance from this object to another under these simplifications: The distance to lines or circles is in {0,POSITIVE_INFINITY} unless this is a point. The distance to radii is POSITIVE_INFINITY unless this is a radius The distance to points is POSITIVE_INFINITY if this is a radius

Specified by:

confusionDistance in class EuObject

Parameters:

other - an EuObject value

Returns:

the parameter or zero

typeName

public char typeName()

Return R for radius.

Specified by:

typeName in class EuObject

Returns:

R

isFull

public boolean isFull()

Determine whether object is a subobject of another.

Specified by:

isFull in class EuObject

Returns:

true since the item is of subtype A_RADIUS, A_POINT, A_LINE, A_CIRCLE

params

public java.lang.String params()

Generate a mathematical specification of parameters associated to the object

Overrides:

params in class EuObject

Returns:

A mathematical specification of parameters associated to the object

toString

public java.lang.String toString()

Generate a mathematical specification of the object

Specified by:

toString in class EuObject

Returns:

A mathematical specification of the object

passArguments

public void passArguments(fundamentals.EuArguments args)

Read off parameters describing the object and add to passed EuArguments instance

Specified by:

passArguments in class EuObject

Parameters:

args - an EuArguments value

toNaturalLanguage

public java.lang.String toNaturalLanguage(int language,
                                          boolean determined)

Generate a description of the object in a natural language (Danish or English)

Specified by:

toNaturalLanguage in class EuObject

Parameters:

language - Globals.DANISH or Globals.ENGLISH

determined - true for a determined noun (the ..., ...en/..et)

Returns:

a String value

nameLocation

public fundamentals.EuVector nameLocation(fundamentals.mouseInfo info)

Describe nameLocation method here. LATER!

Specified by:

nameLocation in class EuObject

Parameters:

info - a mouseInfo value

Returns:

an EuVector value

nameDisplacementAngle

public double nameDisplacementAngle(fundamentals.mouseInfo info)

Describe nameDisplacementAngle method here.

Specified by:

nameDisplacementAngle in class EuObject

Parameters:

info - a mouseInfo value

Returns:

a double value