fi.utu.cs.physics
Class BoundaryLine

java.lang.Object
  |
  +--fi.utu.cs.physics.Particle
        |
        +--fi.utu.cs.physics.Boundary
              |
              +--fi.utu.cs.physics.BoundaryLine

Direct Known Subclasses:

EndBoard, Line, SideBoard

public class BoundaryLine

extends Boundary

A boundary line.

Since:

1.1

Field Summary

static int	HORIZONTAL A horizontal boundary line.
static int	OTHER Non-vertical and non-horizontal boundary line.
static int	VERTICAL A vertical boundary line.

Fields inherited from class fi.utu.cs.physics.Boundary

boundaryEpsilon

Constructor Summary

BoundaryLine(double px1, double py1, double px2, double py2)
Constructs a boundary line from point (px1, py1) to point (px2, py2).

BoundaryLine(Point2 p1, Point2 p2)
Constructs a boundary line from point p1 to point p2.

Method Summary

void	elasticCollision(Body other) Realizes an elastic collision for the static boundary and the body other.
Point2[]	getEndPoints() Returns a two-element array comprising the end points.
int	getType() Returns the type of the boundary line.
void	inelasticCollision(Body other) Realizes an inelastic collision for the static boundary and the body other.
protected boolean	isCrossedByBoundingBox(double x1, double y1, double x2, double y2, double r) Returns true, if the bounding box of the path (x1, y1)-(x2, y2) of a circle with a radius r crosses the boundary line; otherwise, returns false.
protected boolean	isCrossedByLine(double x1, double y1, double x2, double y2) Returns true, if the line (x1, y1)-(x2, y2) crosses the boundary line; otherwise, returns false.
java.lang.String	toString() Returns a string that contains the values of the attributes.

Methods inherited from class fi.utu.cs.physics.Boundary

isCrossed

Methods inherited from class fi.utu.cs.physics.Particle

addCollisionNotification, clearCollisionNotifications, getOwner, isCollisionNotified, isCollisionNotified, isCorporeal, removeCollisionNotification, setCorporeal, setEthereal, setOwner

Methods inherited from class java.lang.Object

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

Field Detail

OTHER

public static final int OTHER

Non-vertical and non-horizontal boundary line.

See Also:

Constant Field Values

HORIZONTAL

public static final int HORIZONTAL

A horizontal boundary line.

See Also:

Constant Field Values

VERTICAL

public static final int VERTICAL

A vertical boundary line.

See Also:

Constant Field Values

Constructor Detail

BoundaryLine

public BoundaryLine(double px1,
                    double py1,
                    double px2,
                    double py2)

Constructs a boundary line from point (px1, py1) to point (px2, py2).

BoundaryLine

public BoundaryLine(Point2 p1,
                    Point2 p2)

Constructs a boundary line from point p1 to point p2.

Method Detail

getEndPoints

public Point2[] getEndPoints()

Returns a two-element array comprising the end points.

getType

public int getType()

Returns the type of the boundary line.

See Also:

HORIZONTAL, VERTICAL, OTHER

isCrossedByBoundingBox

protected boolean isCrossedByBoundingBox(double x1,
                                         double y1,
                                         double x2,
                                         double y2,
                                         double r)

Returns true, if the bounding box of the path (x1, y1)-(x2, y2) of a circle with a radius r crosses the boundary line; otherwise, returns false.

Specified by:

isCrossedByBoundingBox in class Boundary

isCrossedByLine

protected boolean isCrossedByLine(double x1,
                                  double y1,
                                  double x2,
                                  double y2)

Returns true, if the line (x1, y1)-(x2, y2) crosses the boundary line; otherwise, returns false.

Specified by:

isCrossedByLine in class Boundary

elasticCollision

public void elasticCollision(Body other)

Realizes an elastic collision for the static boundary and the body other. The linear momentum and kinetic energy of the body is conserved in the collision.

Specified by:

elasticCollision in class Particle

See Also:

Particle.inelasticCollision(Body)

inelasticCollision

public void inelasticCollision(Body other)

Realizes an inelastic collision for the static boundary and the body other. The linear momentum is conserved but kinetic energy is lost in the collision.

Specified by:

inelasticCollision in class Particle

See Also:

Particle.elasticCollision(Body)

toString

public java.lang.String toString()

Returns a string that contains the values of the attributes.

Overrides:

toString in class Particle