ProGAL.geom2d
Class Line

java.lang.Object
  ProGAL.geom2d.Line

All Implemented Interfaces:

Shape

public class Line
extends java.lang.Object
implements Shape

Constructor Summary

Line(double a, double b, double c)
creates a line ax + by + c = 0

Line(LineSegment seg)
creates a line through a given segment

Line(Point p, Point q)
creates a line through 2 given points

Line(Point p, Vector n)
creates a line through a given point and with a given normal vector

Method Summary

static boolean	areParallel(Line l1, Line l2)
Point	getCenter() Get the geometric center of the shape.
Vector	getDirection()
double	getDistance(Point q) returns the distance of the point q to the line
static Point	getIntersection(Line l1, Line l2)
Point	getPoint(double d) returns the point on the line at distance d from the line-defining point p
double	getSlope()
double	intersectionParameter(Line l)
boolean	isParallelWith(Line l)
boolean	isVertical()
double	projectionParameter(Point q)
Point	projectPoint(Point q)
void	toConsole()
void	toConsole(java.lang.String name)
java.lang.String	toString()
java.lang.String	toString(java.lang.String name)

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

Line

public Line(Point p,
            Vector n)

creates a line through a given point and with a given normal vector

Line

public Line(Point p,
            Point q)

creates a line through 2 given points

Line

public Line(LineSegment seg)

creates a line through a given segment

Line

public Line(double a,
            double b,
            double c)

creates a line ax + by + c = 0

Method Detail

getDirection

public Vector getDirection()

getSlope

public double getSlope()

isVertical

public boolean isVertical()

isParallelWith

public boolean isParallelWith(Line l)

areParallel

public static boolean areParallel(Line l1,
                                  Line l2)

projectPoint

public Point projectPoint(Point q)

projectionParameter

public double projectionParameter(Point q)

getIntersection

public static Point getIntersection(Line l1,
                                    Line l2)

toString

public java.lang.String toString(java.lang.String name)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

toConsole

public void toConsole(java.lang.String name)

toConsole

public void toConsole()

getPoint

public Point getPoint(double d)

returns the point on the line at distance d from the line-defining point p

getDistance

public double getDistance(Point q)

returns the distance of the point q to the line

intersectionParameter

public double intersectionParameter(Line l)

getCenter

public Point getCenter()

Description copied from interface: Shape

Get the geometric center of the shape. The center of a shape can be interpreted in many ways (center of mass, circumcenter, inscribed center etc.). No strict requirement is given here, but typically the circumcenter should be supplied. This method is most prominently used to find the average center-position of a collection of shapes such that scene-viewers can be centered on the scene.

Specified by:

getCenter in interface Shape