prefuse.util.force
Class ForceItem

java.lang.Object
  prefuse.util.force.ForceItem

All Implemented Interfaces:

java.lang.Cloneable

public class ForceItem
extends java.lang.Object
implements java.lang.Cloneable

Represents a point particle in a force simulation, maintaining values for mass, forces, velocity, and position.

Author:

jeffrey heer

Field Summary

float[]	force The values of the forces acting on this ForceItem.
float[][]	k Temporary variables for Runge-Kutta integration
float[][]	l Temporary variables for Runge-Kutta integration
float[]	location The location values of this ForceItem.
float	mass The mass value of this ForceItem.
float[]	plocation The previous location values of this ForceItem.
float[]	velocity The velocity values of this ForceItem.

Constructor Summary

ForceItem()
Create a new ForceItem.

Method Summary

java.lang.Object	clone() Clone a ForceItem.
static boolean	isValid(ForceItem item) Checks a ForceItem to make sure its values are all valid numbers (i.e., not NaNs).

Methods inherited from class java.lang.Object

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

Field Detail

mass

public float mass

The mass value of this ForceItem.

force

public float[] force

The values of the forces acting on this ForceItem.

velocity

public float[] velocity

The velocity values of this ForceItem.

location

public float[] location

The location values of this ForceItem.

plocation

public float[] plocation

The previous location values of this ForceItem.

k

public float[][] k

Temporary variables for Runge-Kutta integration

l

public float[][] l

Temporary variables for Runge-Kutta integration

Constructor Detail

ForceItem

public ForceItem()

Create a new ForceItem.

Method Detail

clone

public java.lang.Object clone()

Clone a ForceItem.

Overrides:

clone in class java.lang.Object

See Also:

Object.clone()

isValid

public static final boolean isValid(ForceItem item)

Checks a ForceItem to make sure its values are all valid numbers (i.e., not NaNs).

Parameters:

item - the item to check

Returns:

true if all the values are valid, false otherwise