PinBallDomain
Class PolygonObstacle

java.lang.Object
  PinBallDomain.PolygonObstacle

All Implemented Interfaces:

Obstacle

public class PolygonObstacle
extends java.lang.Object
implements Obstacle

Obstacle class for polygonal obstacles. This is the only type of obstacle implemented at the moment.

Author:

George Konidaris (gdk at cs dot umass dot edu)

Method Summary

boolean	collision(Ball b) Determine whether or not there has been a collision.
double[]	collisionEffect(Ball b) Determine the effect of the ball's collision with the obstacle.
static PolygonObstacle	create(java.lang.String line) Create a polygon obstacle from a line of configuration file text.
Point	getIntercept() Get the last intercept point.
java.util.ArrayList<Point>	getPoints() Get the Point variables making up the obstacle.
boolean	inside(Point p) Determine whether a point lies within the polygon.
static boolean	matchTag(java.lang.String line) Determine whether a given config input text line matches a polygon obstacle.
void	write(java.io.FileWriter f) Write the polygon to a file.

Methods inherited from class java.lang.Object

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

Method Detail

collision

public boolean collision(Ball b)

Determine whether or not there has been a collision.

Specified by:

collision in interface Obstacle

Parameters:

b - the ball

Returns:

true if there was a collision, false if there wasn't.

collisionEffect

public double[] collisionEffect(Ball b)

Determine the effect of the ball's collision with the obstacle. NOTE: must call LineIntersect (probably via collision) first

Specified by:

collisionEffect in interface Obstacle

Parameters:

b - the ball

Returns:

the collision effect (array of 2 doubles)

matchTag

public static boolean matchTag(java.lang.String line)

Determine whether a given config input text line matches a polygon obstacle.

Parameters:

line - the input line

Returns:

true if there's a match, false if not

write

public void write(java.io.FileWriter f)
           throws java.io.IOException

Write the polygon to a file.

Specified by:

write in interface Obstacle

Parameters:

f - the file to write to

Throws:

java.io.IOException

create

public static PolygonObstacle create(java.lang.String line)

Create a polygon obstacle from a line of configuration file text.

Parameters:

line - the line

Returns:

the resulting polygon obstacle

getPoints

public java.util.ArrayList<Point> getPoints()

Get the Point variables making up the obstacle.

Returns:

an ArrayList of Points

getIntercept

public Point getIntercept()

Get the last intercept point.

Specified by:

getIntercept in interface Obstacle

Returns:

the intercept point

inside

public boolean inside(Point p)

Determine whether a point lies within the polygon.

Specified by:

inside in interface Obstacle

Parameters:

p - the test point

Returns:

true if p lies within the obstacle, false otherwise