rcssjava.geom
Class Line

java.lang.Object
  rcssjava.geom.Line

public class Line
extends java.lang.Object

Implementation of 2d line

Constructor Summary

Line(double a, double b, double c)
Construct line given the three coefficients in ay + bx + c = 0.

Method Summary

double	getA() Get a coefficient
double	getB() Get a coefficient
double	getC() Get a coefficient
double	getDistanceToPoint(VecPosition pos) Get euclidean distance between a given point and the closest point on the line to that point
VecPosition	getIntersection(Line line) Get intersecton with a line
VecPosition	getIntersection(LineSegment ls) Get intersecton with a line segment
VecPosition	getPointOnLineClosestTo(VecPosition pos) Get point on line with smallest euclidean distance to given point
double	getSlope() Get slope
Line	getTangentLine(VecPosition pos) Get line orthogonal to this that passes through the given point
double	getXGivenY(double y) Get the x coordinate on the line for a given y coordinate
double	getYGivenX(double x) Get the y coordinate on the line for a given x coordinate
double	getYIntercept() Get y-intercept
static Line	makeLineFromTwoPoints(VecPosition pos1, VecPosition pos2) Create the line that passes through the two given points
java.lang.String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

Line

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

Construct line given the three coefficients in ay + bx + c = 0.

Parameters:

a - a coefficient

b - b coefficient

c - c coefficient

Method Detail

getA

public double getA()

Get a coefficient

Returns:

a coefficient

getB

public double getB()

Get a coefficient

Returns:

b coefficient

getC

public double getC()

Get a coefficient

Returns:

c coefficient

getSlope

public double getSlope()

Get slope

Returns:

slope, m in y = mx + b

getYIntercept

public double getYIntercept()

Get y-intercept

Returns:

y-intercept, b in y = mx + b

getIntersection

public VecPosition getIntersection(LineSegment ls)

Get intersecton with a line segment

Parameters:

ls - line segment

Returns:

intersection point or null if none

getIntersection

public VecPosition getIntersection(Line line)

Get intersecton with a line

Parameters:

line - another line

Returns:

intersection point or null if none

getTangentLine

public Line getTangentLine(VecPosition pos)

Get line orthogonal to this that passes through the given point

Parameters:

pos - intersection point

Returns:

orthogonal line

getPointOnLineClosestTo

public VecPosition getPointOnLineClosestTo(VecPosition pos)

Get point on line with smallest euclidean distance to given point

Parameters:

pos - point to which closest should be determined

Returns:

point on line closest to given point

getDistanceToPoint

public double getDistanceToPoint(VecPosition pos)

Get euclidean distance between a given point and the closest point on the line to that point

Parameters:

pos - point to which closest should be determined

Returns:

distance to given point

getYGivenX

public double getYGivenX(double x)

Get the y coordinate on the line for a given x coordinate

Parameters:

x - x coordinate

Returns:

y coordinate

getXGivenY

public double getXGivenY(double y)

Get the x coordinate on the line for a given y coordinate

Parameters:

y - y coordinate

Returns:

x coordinate

makeLineFromTwoPoints

public static Line makeLineFromTwoPoints(VecPosition pos1,
                                         VecPosition pos2)

Create the line that passes through the two given points

Parameters:

pos1 - first point

pos2 - second point

Returns:

line passing through both points

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object