java.lang.Object
- org.jungrapht.visualization.layout.algorithms.repulsion.StandardFA2Repulsion<V,R,B>

Type Parameters:

V - vertex class

R - repulsion class

B - repulsion builder class

All Implemented Interfaces:

StandardRepulsion<V,R,B>

Direct Known Subclasses:

BarnesHutFA2Repulsion
```
public class StandardFA2Repulsion<V,R extends StandardFA2Repulsion<V,R,B>,B extends StandardFA2Repulsion.Builder<V,R,B>>
extends Object
implements StandardRepulsion<V,R,B>
```
Standard implementation of repulsion. We can strongly recommend to use this class only for Graphs with hundreds nodes. Complexity is O(N^2).
For large Graphs use BarnesHutFA2Repulsion.

See Also:

"ForceAtlas2, a Continuous Graph Layout Algorithm for Handy Network Visualization Designed for the Gephi Software", "https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0098679"

Nested Class Summary

Nested Classes
Modifier and Type	Class	Description
`static class`	`StandardFA2Repulsion.Builder<V,R extends StandardFA2Repulsion<V,R,B>,B extends StandardFA2Repulsion.Builder<V,R,B>>`

Field Summary

Fields
Modifier and Type	Field	Description
`protected static double`	`epsilon`
`protected Map<V,Point>`	`frVertexData`
`protected Function<V,Point>`	`initializer`
`protected double`	`kr`
`protected LayoutModel<V>`	`layoutModel`
`protected Map<V,Double>`	`nodeMasses`
`protected Function<V,Double>`	`nodeSizes`
`protected Random`	`random`
`protected Set<V>`	`vertexSet`

Constructor Summary

Constructors
Modifier Constructor Description

protected StandardFA2Repulsion(StandardFA2Repulsion.Builder<V,R,B> builder)

Method Summary

All Methods Static Methods Instance Methods Concrete Methods Deprecated Methods
Modifier and Type	Method	Description
`static StandardFA2Repulsion.Builder`	`builder()`
`void`	`calculateRepulsion()`
`Random`	`getRandom()`
`static StandardFA2Repulsion.Builder`	`standardBuilder()`	Deprecated.
`void`	`step()`	called from the layout algorithm on every step.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - frVertexData
```
protected Map<V,Point> frVertexData
```
  - initializer
```
protected Function<V,Point> initializer
```
  - layoutModel
```
protected LayoutModel<V> layoutModel
```
  - vertexSet
```
protected Set<V> vertexSet
```
  - random
```
protected Random random
```
  - kr
```
protected double kr
```
  - nodeSizes
```
protected Function<V,Double> nodeSizes
```
  - nodeMasses
```
protected Map<V,Double> nodeMasses
```
  - epsilon
```
protected static final double epsilon
```
    See Also:
    
    Constant Field Values
- Constructor Detail
  - StandardFA2Repulsion
```
protected StandardFA2Repulsion(StandardFA2Repulsion.Builder<V,R,B> builder)
```
- Method Detail
  - builder
```
public static StandardFA2Repulsion.Builder builder()
```
  - standardBuilder
```
@Deprecated
public static StandardFA2Repulsion.Builder standardBuilder()
```
    Deprecated.
  - step
```
public void step()
```
    Description copied from interface: StandardRepulsion
    
    called from the layout algorithm on every step. this version is a noop but the subclass BarnesHut version rebuilds the tree on every step
    
    Specified by:
    
    step in interface StandardRepulsion<V,R extends StandardFA2Repulsion<V,R,B>,B extends StandardFA2Repulsion.Builder<V,R,B>>
  - getRandom
```
public Random getRandom()
```
  - calculateRepulsion
```
public void calculateRepulsion()
```
    Specified by:
    
    calculateRepulsion in interface StandardRepulsion<V,R extends StandardFA2Repulsion<V,R,B>,B extends StandardFA2Repulsion.Builder<V,R,B>>

Class StandardFA2Repulsion<V,​R extends StandardFA2Repulsion<V,​R,​B>,​B extends StandardFA2Repulsion.Builder<V,​R,​B>>

Nested Class Summary

Field Summary

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

frVertexData

initializer

layoutModel

vertexSet

random

kr

nodeSizes

nodeMasses

epsilon

Constructor Detail

StandardFA2Repulsion

Method Detail

builder

standardBuilder

step

getRandom

calculateRepulsion

Class StandardFA2Repulsion<V,R extends StandardFA2Repulsion<V,R,B>,B extends StandardFA2Repulsion.Builder<V,R,B>>