sysModel.env
Class NoGridEnv.Direction

java.lang.Object
  sysModel.env.NoGridEnv.Direction

Enclosing class:

NoGridEnv

public static class NoGridEnv.Direction
extends java.lang.Object

Concrete direction class.

Field Summary

private double	_dx Direction delta x.
private double	_dy Direction delta y.
private static double	EPSILON

Constructor Summary

NoGridEnv.Direction()
Creates a new direction facing north.

NoGridEnv.Direction(double dx, double dy)
Constructor.

NoGridEnv.Direction(NoGridEnv.Direction other)
Copy constructor.

Method Summary

NoGridEnv.Direction	duplicate() Return a new object which has the same direction.
double	getAngle() Return the angle between (0,-1) and this direction.
double	getDeltaX() Return the direction delta x.
double	getDeltaY() Return the direction delta y.
static NoGridEnv.Direction	parse(Lexer l) Parses a direction.
void	reverseDirection() Reverse this direction.
void	rotateGraphics(java.awt.Graphics2D g) Rotate the supplied Graphics2D object to match this direction.
boolean	same(NoGridEnv.Direction other) Return true of this direction is the same as the other.
java.lang.String	toString() Overridden toString method.
void	turnLeft() Turn this direction PI/2 radians to the left.
void	turnLeft(double radians) Turn this direction to the left.
void	turnRight() Turn this direction PI/2 radians to the right.
void	turnRight(double radians) Turn this direction to the right.

Methods inherited from class java.lang.Object

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

Field Detail

EPSILON

private static double EPSILON

_dx

private double _dx

Direction delta x.

_dy

private double _dy

Direction delta y.

Constructor Detail

NoGridEnv.Direction

public NoGridEnv.Direction(double dx,
                           double dy)

Constructor.

Parameters:

dx - delta x

dy - delta y

NoGridEnv.Direction

public NoGridEnv.Direction(NoGridEnv.Direction other)

Copy constructor.

Parameters:

other - other direction

NoGridEnv.Direction

public NoGridEnv.Direction()

Creates a new direction facing north.

Method Detail

getDeltaX

public double getDeltaX()

Return the direction delta x.

Returns:

double direction delta x

getDeltaY

public double getDeltaY()

Return the direction delta y.

Returns:

double direction delta y

duplicate

public NoGridEnv.Direction duplicate()

Return a new object which has the same direction.

Returns:

new object with same direction

reverseDirection

public void reverseDirection()

Reverse this direction.

same

public boolean same(NoGridEnv.Direction other)

Return true of this direction is the same as the other.

Parameters:

other - other direction

Returns:

true if the directions are the same

turnLeft

public void turnLeft(double radians)

Turn this direction to the left.

Parameters:

radians - radians to turn

turnLeft

public void turnLeft()

Turn this direction PI/2 radians to the left.

turnRight

public void turnRight(double radians)

Turn this direction to the right.

Parameters:

radians - radians to turn

turnRight

public void turnRight()

Turn this direction PI/2 radians to the right.

toString

public java.lang.String toString()

Overridden toString method.

Overrides:

toString in class java.lang.Object

Returns:

string representation

parse

public static NoGridEnv.Direction parse(Lexer l)

Parses a direction.

Parameters:

l - parser to read from

Returns:

parsed direction

rotateGraphics

public void rotateGraphics(java.awt.Graphics2D g)

Rotate the supplied Graphics2D object to match this direction.

Parameters:

g - graphics object to rotate

getAngle

public double getAngle()

Return the angle between (0,-1) and this direction.

Returns:

angle in radians