rescuecore2.misc.geometry

Class Line2D

java.lang.Object

rescuecore2.misc.geometry.Line2D

All Implemented Interfaces:

Indexable

public class Line2D
extends java.lang.Object
implements Indexable

A line segment in 2D space. Lines are immutable.

Constructor Summary

Constructors

Constructor and Description
Line2D(double x, double y, double dx, double dy) Create a new line segment.
Line2D(Point2D origin, Point2D end) Create a new line segment.
Line2D(Point2D origin, Vector2D direction) Create a new line segment.

Method Summary

Modifier and Type	Method and Description
Region	getBoundingRegion() Get the bounding region of this object.
Vector2D	getDirection() Get the direction of this line segment.
Point2D	getEndPoint() Get the endpoint of this line segment.
double	getIntersection(Line2D other) Find out how far along this line the intersection point with another line is.
Point2D	getOrigin() Get the origin of this line segment.
Point2D	getPoint(double t) Get a point along this line.
void	setEnd(Point2D end2)
void	setOrigin(Point2D origin)
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

Line2D

public Line2D(Point2D origin,
              Vector2D direction)

Create a new line segment.

Parameters:

origin - The origin of the line.

direction - The direction of the line.

Line2D

public Line2D(Point2D origin,
              Point2D end)

Create a new line segment.

Parameters:

origin - The origin of the line.

end - The end of the line.

Line2D

public Line2D(double x,
              double y,
              double dx,
              double dy)

Create a new line segment.

Parameters:

x - The x coordinate of the origin.

y - The y coordinate of the origin.

dx - The x component of the direction.

dy - The y component of the direction.

Method Detail

getPoint

public Point2D getPoint(double t)

Get a point along this line.

Parameters:

t - The distance along the direction vector to create the point.

Returns:

A new Point2D.

getOrigin

public Point2D getOrigin()

Get the origin of this line segment.

Returns:

The origin.

getEndPoint

public Point2D getEndPoint()

Get the endpoint of this line segment.

Returns:

The endpoint.

getDirection

public Vector2D getDirection()

Get the direction of this line segment.

Returns:

The direction vector.

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getIntersection

public double getIntersection(Line2D other)

Find out how far along this line the intersection point with another line is.

Parameters:

other - The other line.

Returns:

How far along this line (in terms of this line's direction vector) the intersection point is, or NaN if the lines are parallel.

getBoundingRegion

public Region getBoundingRegion()

Description copied from interface: Indexable

Get the bounding region of this object.

Specified by:

getBoundingRegion in interface Indexable

Returns:

The bounding region.

setEnd

public void setEnd(Point2D end2)

setOrigin

public void setOrigin(Point2D origin)