com.jme.math.spring
Class Spring

java.lang.Object
  com.jme.math.spring.Spring

All Implemented Interfaces:

Savable

public class Spring
extends java.lang.Object
implements Savable

Spring defines a single spring connecting two SpringNodes in a SpringSystem.

Version:

$Id: Spring.java 4131 2009-03-19 20:15:28Z blaine.dev $

Author:

Joshua Slack

Field Summary

SpringPoint	node1 First node connected by this Spring.
SpringPoint	node2 Second node connected by this Spring.

Constructor Summary

Spring(SpringPoint node1, SpringPoint node2, float restLength)
Public constructor.

Method Summary

java.lang.Class	getClassTag() The peristed type for the object.
float	getRestLength() Return the rest length of this Spring.
void	read(JMEImporter e)
void	setRestLength(float restLength) Set the rest length of this Spring.
void	update() Updates the positions of the nodes connected by this spring based on spring force calculations.
void	updateTotalMassFromNodes() Computes the spring collective mass from the node using inverted masses for stability
void	write(JMEExporter e)

Methods inherited from class java.lang.Object

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

Field Detail

node1

public SpringPoint node1

First node connected by this Spring.

node2

public SpringPoint node2

Second node connected by this Spring.

Constructor Detail

Spring

public Spring(SpringPoint node1,
              SpringPoint node2,
              float restLength)

Public constructor.

Parameters:

node1 - SpringNode

node2 - SpringNode

restLength - float

Method Detail

setRestLength

public void setRestLength(float restLength)

Set the rest length of this Spring. Also, calculates and sets the squared rest length field.

Parameters:

restLength - float

getRestLength

public float getRestLength()

Return the rest length of this Spring.

Returns:

float

updateTotalMassFromNodes

public void updateTotalMassFromNodes()

Computes the spring collective mass from the node using inverted masses for stability

update

public void update()

Updates the positions of the nodes connected by this spring based on spring force calculations. Relaxation method idea came from paper on physics system of Hitman game.

write

public void write(JMEExporter e)
           throws java.io.IOException

Specified by:

write in interface Savable

Throws:

java.io.IOException

read

public void read(JMEImporter e)
          throws java.io.IOException

Specified by:

read in interface Savable

Throws:

java.io.IOException

getClassTag

public java.lang.Class getClassTag()

Description copied from interface: Savable

The peristed type for the object. Note that tag here does not mean XML tag, but the class that the object is tagged with.

Specified by:

getClassTag in interface Savable