jdsl.geomobj.ref
Class RatSegment2D

java.lang.Object
  |
  +--jdsl.geomobj.ref.AbstractGeomObject2D
        |
        +--jdsl.geomobj.ref.AbstractLinearCurve2D
              |
              +--jdsl.geomobj.ref.AbstractRatLinearCurve2D
                    |
                    +--jdsl.geomobj.ref.RatSegment2D

All Implemented Interfaces:

Curve2D, GeomObject, GeomObject2D, LinearCurve2D, OpenCurve2D, Segment2D

public class RatSegment2D

extends AbstractRatLinearCurve2D

implements Segment2D

A Segment2D constructed using two distinct integer or rational points.

Version:

$Id: RatSegment2D.java,v 1.4 2001/04/28 10:52:58 lv Exp $

Author:

Masi Oka (mao), Luca Vismara (lv)

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

GeomObject2D.NoneGeomObject2D

Fields inherited from class jdsl.geomobj.ref.AbstractRatLinearCurve2D

dir_, p1_, p2_

Fields inherited from class jdsl.geomobj.ref.AbstractLinearCurve2D

bottom_, INFINITE, left_, NEGATIVE, POSITIVE, right_, slope_, top_, ZERO

Fields inherited from class jdsl.geomobj.ref.AbstractGeomObject2D

gt, jn

Fields inherited from interface jdsl.geomobj.api.GeomObject2D

NONE

Constructor Summary

RatSegment2D(Point2D p1, Point2D p2)
Creates a segment with endpoints p1 and p2; the underlying direction is from p1 to p2.

Method Summary

Point2D	bottomPoint()
boolean	equals(java.lang.Object obj)
Point2D	leftPoint()
Point2D	rightPoint()
Line2D	supportingLine()
Point2D	topPoint()

Methods inherited from class jdsl.geomobj.ref.AbstractRatLinearCurve2D

arithmeticType, direction, points

Methods inherited from class jdsl.geomobj.ref.AbstractLinearCurve2D

isDecreasing, isHorizontal, isIncreasing, isVertical, toString

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.LinearCurve2D

direction, isDecreasing, isHorizontal, isIncreasing, isVertical

Methods inherited from interface jdsl.geomobj.api.OpenCurve2D

points

Methods inherited from interface jdsl.geomobj.api.GeomObject

arithmeticType, dim

Constructor Detail

RatSegment2D

public RatSegment2D(Point2D p1,
                    Point2D p2)
             throws InvalidPointException

Creates a segment with endpoints p1 and p2; the underlying direction is from p1 to p2.

Parameters:

p1 - one endpoint of the segment; must be an integer or a rational point

p2 - the other endpoint of the segment; must be an integer or rational point distinct from p1

Throws:

InvalidPointException - if p1 and p2 are not integer or rational points, or if they are coincident

Method Detail

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

bottomPoint

public Point2D bottomPoint()

Specified by:

bottomPoint in interface Segment2D

Following copied from interface: jdsl.geomobj.api.Segment2D

Returns:

the bottom endpoint of this; any endpoint if this is horizontal

topPoint

public Point2D topPoint()

Specified by:

topPoint in interface Segment2D

Following copied from interface: jdsl.geomobj.api.Segment2D

Returns:

the top endpoint of this; any endpoint if this is horizontal

leftPoint

public Point2D leftPoint()

Specified by:

leftPoint in interface Segment2D

Following copied from interface: jdsl.geomobj.api.Segment2D

Returns:

the leftmost endpoint of this; any endpoint if this is vertical

rightPoint

public Point2D rightPoint()

Specified by:

rightPoint in interface Segment2D

Following copied from interface: jdsl.geomobj.api.Segment2D

Returns:

the rightmost endpoint of this; any endpoint if this is vertical

supportingLine

public Line2D supportingLine()

Specified by:

supportingLine in interface Segment2D

Following copied from interface: jdsl.geomobj.api.Segment2D

Returns:

the line passing through the endpoints and with the same direction of this