net.jinx.physics.gravity
Class Gravity

java.lang.Object
  net.jinx.action.Actor
      net.jinx.physics.gravity.Gravity

All Implemented Interfaces:

Force

public class Gravity
extends Actor
implements Force

Field Summary

static float

GCU The gravitational constant of the universe.

Constructor Summary

Gravity()

Method Summary

void	added(PhysicalObject obj) Called by Universe to notify this Force that a PhysicalObject has been added to the simulation.
void	applyForce(PhysicalObject o1) Provides the force acting on object due to this Force.
protected static Vector	getForce(PhysicalObject o1, PhysicalObject o2)
static Vector	getObjectCOG(PhysicalObject obj) Provides the center of gravity of object in object coordinates.
static Vector	getWorldCOG(PhysicalObject obj)
boolean	isBigMass(PhysicalObject obj) Determines if obj is a gravitationally significant mass.
protected void	processEvent(ActorEvent event) Does nothing.
void	removed(PhysicalObject obj) Called by Universe to notify this Force that a PhysicalObject has been removed from the simulation.

Methods inherited from class net.jinx.action.Actor

checkAllowAdd, getName, getOwner, hashCode, ownerChanged, sendEvent, sendEvent, sendEvent

Methods inherited from class java.lang.Object

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

Field Detail

GCU

public static final float GCU

The gravitational constant of the universe.

See Also:

Constant Field Values

Constructor Detail

Gravity

public Gravity()

Method Detail

getObjectCOG

public static Vector getObjectCOG(PhysicalObject obj)

Provides the center of gravity of object in object coordinates.

Parameters:

obj - the PhysicalObject.

Returns:

the center of gravity of object in object coordinates.

getWorldCOG

public static Vector getWorldCOG(PhysicalObject obj)

isBigMass

public boolean isBigMass(PhysicalObject obj)

Determines if obj is a gravitationally significant mass.

Parameters:

obj - the PhysicalObject.

Returns:

true if it's been tagged with a BigMassTag.

added

public void added(PhysicalObject obj)

Description copied from interface: Force

Called by Universe to notify this Force that a PhysicalObject has been added to the simulation.

Specified by:

added in interface Force

Parameters:

obj - the PhysicalObject that was added.

removed

public void removed(PhysicalObject obj)

Description copied from interface: Force

Called by Universe to notify this Force that a PhysicalObject has been removed from the simulation.

Specified by:

removed in interface Force

Parameters:

obj - the PhysicalObject that was removed.

applyForce

public void applyForce(PhysicalObject o1)

Description copied from interface: Force

Provides the force acting on object due to this Force.

Specified by:

applyForce in interface Force

Parameters:

o1 - the PhysicalObject.

getForce

protected static Vector getForce(PhysicalObject o1,
                                 PhysicalObject o2)

processEvent

protected void processEvent(ActorEvent event)

Does nothing. Required for extending Actor.

Specified by:

processEvent in class Actor

Parameters:

event - the ActorEvent to process.