com.partnersoft.geometry
Class Line

java.lang.Object
  com.partnersoft.geometry.Line

All Implemented Interfaces:

java.io.Serializable

public class Line
extends java.lang.Object
implements java.io.Serializable

A double-precision line class.

Author:

Paul Reavis Copyright 1999 Partner Software, Inc.

See Also:

Serialized Form

Field Summary

double	x1
double	x2
double	y1
double	y2

Constructor Summary

Line()

Line(double x1, double y1, double x2, double y2)

Method Summary

boolean	clipToRectangle(Rectangle rectangle) Clip this line to rectangle.
boolean	equals(Line nother)
boolean	equals(java.lang.Object nother)
Point	getCenter()
double	getLength()
double	getSlope()
double	getX1()
double	getX2()
double	getY1()
double	getY2()
Point	intersect(Line nother) Finds the intersection point for the two lines.
boolean	isDegenerate()
boolean	isHorizontal()
boolean	isRightOf(double x, double y) Returns true if this line lies to the "right" of the given point, Imagine yourself walking from x1,y1 to x2, y2.
boolean	isVertical()
void	setToMatch(Line nother)
void	setX1(double newX)
void	setX2(double newX)
void	setY1(double newY)
void	setY2(double newY)
double	solveForX(double y) Finds the x for the given y.
double	solveForY(double x) Finds the y for the given x.
void	sortLeftToRight() Makes it run from left to right (so x1 <= x2)
void	swapEnds() Swaps ends (x1 and x2, y1 and y2)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

x1

public double x1

y1

public double y1

x2

public double x2

y2

public double y2

Constructor Detail

Line

public Line()

Line

public Line(double x1,
            double y1,
            double x2,
            double y2)

Method Detail

getX1

public double getX1()

setX1

public void setX1(double newX)

getY1

public double getY1()

setY1

public void setY1(double newY)

getX2

public double getX2()

setX2

public void setX2(double newX)

getY2

public double getY2()

setY2

public void setY2(double newY)

setToMatch

public void setToMatch(Line nother)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

isDegenerate

public boolean isDegenerate()

isVertical

public boolean isVertical()

isHorizontal

public boolean isHorizontal()

getSlope

public double getSlope()

getLength

public double getLength()

equals

public boolean equals(Line nother)

equals

public boolean equals(java.lang.Object nother)

Overrides:

equals in class java.lang.Object

getCenter

public Point getCenter()

solveForX

public double solveForX(double y)

Finds the x for the given y.

solveForY

public double solveForY(double x)

Finds the y for the given x.

sortLeftToRight

public void sortLeftToRight()

Makes it run from left to right (so x1 <= x2)

intersect

public Point intersect(Line nother)

Finds the intersection point for the two lines.

swapEnds

public void swapEnds()

Swaps ends (x1 and x2, y1 and y2)

isRightOf

public boolean isRightOf(double x,
                         double y)

Returns true if this line lies to the "right" of the given point, Imagine yourself walking from x1,y1 to x2, y2. If the point is to your left, this message returns true.

clipToRectangle

public boolean clipToRectangle(Rectangle rectangle)

Clip this line to rectangle. Returns false if the line does not intersect the rectangle, and leaves x and y in an indeterminate state.