jdsl.geomobj.ref
Class IntCircle2D

java.lang.Object
  |
  +--jdsl.geomobj.ref.AbstractGeomObject2D
        |
        +--jdsl.geomobj.ref.AbstractCircle2D
              |
              +--jdsl.geomobj.ref.IntCircle2D

All Implemented Interfaces:

Circle2D, ClosedCurve2D, Curve2D, GeomObject, GeomObject2D

public class IntCircle2D

extends AbstractCircle2D

implements Circle2D

This is the class for a two-dimensional circle constructed using three integer points.

Version:

$Id: IntCircle2D.java,v 1.5 2001/05/16 13:44:56 lv Exp $

Author:

Masi Oka (mao), Luca Vismara (lv)

Inner classes inherited from class jdsl.geomobj.api.GeomObject2D

GeomObject2D.NoneGeomObject2D

Field Summary

protected IntPoint2D	p1_
protected IntPoint2D	p2_
protected IntPoint2D	p3_

Fields inherited from class jdsl.geomobj.ref.AbstractCircle2D

approxSqRadius_, approxSqRadius_computed_, center_, sqRadius_, sqRadius_computed_, sqRadius_denom_, sqRadius_num_

Fields inherited from class jdsl.geomobj.ref.AbstractGeomObject2D

gt, jn

Fields inherited from interface jdsl.geomobj.api.GeomObject2D

NONE

Constructor Summary

IntCircle2D(Point2D p1, Point2D p2, Point2D p3)

Method Summary

int	arithmeticType() The arithmetic type of a geometric object is encoded as an integer number.
protected void	computeCenter()
protected void	computeSqRadius()
boolean	equals(java.lang.Object obj)
Point2D[]	points()
java.lang.String	toString()

Methods inherited from class jdsl.geomobj.ref.AbstractCircle2D

center, squaredRadius

Methods inherited from class jdsl.geomobj.ref.AbstractGeomObject2D

dim

Methods inherited from class java.lang.Object

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

Methods inherited from interface jdsl.geomobj.api.Circle2D

center, squaredRadius

Methods inherited from interface jdsl.geomobj.api.GeomObject

dim

Field Detail

p1_

protected IntPoint2D p1_

p2_

protected IntPoint2D p2_

p3_

protected IntPoint2D p3_

Constructor Detail

IntCircle2D

public IntCircle2D(Point2D p1,
                   Point2D p2,
                   Point2D p3)
            throws InvalidPointException

Parameters:

p1 - a point of the circle; must be an integer point

p2 - a second point of the circle; must be an integer point distinct from p1

p3 - a third point of the circle; must be an integer point distinct from p1 and p2

Throws:

InvalidPointException - if p1, p2, and p3 are not integer points, or if p1, p2, and p3 are not distinct, or if p1, p2, and p3 are collinear

Method Detail

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

arithmeticType

public int arithmeticType()

Description copied from interface: GeomObject

The arithmetic type of a geometric object is encoded as an integer number. Current legal values are: 0 = an integer geometric object 1 = a rational geometric object

Specified by:

arithmeticType in interface GeomObject

Following copied from interface: jdsl.geomobj.api.GeomObject

Returns:

the arithmetic type of this

points

public Point2D[] points()

Specified by:

points in interface ClosedCurve2D

Following copied from interface: jdsl.geomobj.api.ClosedCurve2D

Returns:

an array of points defining this; the points are in clockwise order

computeCenter

protected void computeCenter()

Overrides:

computeCenter in class AbstractCircle2D

computeSqRadius

protected void computeSqRadius()

Overrides:

computeSqRadius in class AbstractCircle2D