NBarycenterLayout Class

In This Topic

The NBarycenterLayout class represents a force directed layout, which implements the barycenter layout method.

Object Model

Syntax

Visual Basic
C#

'Declaration
 
<System.ComponentModel.TypeConverterAttribute(System.ComponentModel.ExpandableObjectConverter)>
Public Class NBarycenterLayout 
   Inherits NForceDirectedLayout
   Implements Nevron.Diagram.INMeasurements, Nevron.Diagram.INMeasurementUnit, Nevron.Diagram.INResolution, Nevron.Dom.INAttribute, Nevron.Dom.INHistoryCallback, Nevron.INReferenceHolder, Nevron.INReferenceProvider

'Usage
 
Dim instance As NBarycenterLayout

[System.ComponentModel.TypeConverter(System.ComponentModel.ExpandableObjectConverter)]
public class NBarycenterLayout : NForceDirectedLayout, Nevron.Diagram.INMeasurements, Nevron.Diagram.INMeasurementUnit, Nevron.Diagram.INResolution, Nevron.Dom.INAttribute, Nevron.Dom.INHistoryCallback, Nevron.INReferenceHolder, Nevron.INReferenceProvider

Remarks

The barycenter layout method splits the input graph into a set of fixed and free vertices. Fixed vertices are nailed to the corners of a strictly convex polygon, while free vertices are placed in the barycenter of their neighbours.

In case there are no fixed vertices this will place all vertices at a single point, which is obviously not a good graph drawing. That is why the barycenter layout needs at least three fixed vertices.

The minimal amount of fixed vertices is specified by the MinFixedVerticesCount property. If the input graph does not have that many fixed vertices, the layout will automatically forefill this requirement. This is done by fixing the vertices with the smallest degree.

The attractive force pulling the vertices towards their barycenter is represented by an instance of the NBarycenterForce class, accessible from the BarycenterForce property.

Inheritance Hierarchy

System.Object
   Nevron.Dom.NAttribute
      Nevron.Diagram.Layout.NLayout
         Nevron.Diagram.Layout.NGraphPartsLayout
            Nevron.Diagram.Layout.NGraphLayout
               Nevron.Diagram.Layout.NForceDirectedLayout
                  Nevron.Diagram.Layout.NBarycenterLayout

Requirements

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

NBarycenterLayout Members
Nevron.Diagram.Layout Namespace

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