This demo shows how edge bundling can be applied for reducing visual cluttering in dense
graphs.
The edge curves are drawn using piecewise cubic bezier curves with gradient colors from
dark-blue (that starts from the source node) to light-blue (that leads to the target node
of the edge). For the approximation of the edge curves, a
CurveFittingStage is applied.
For circular layouts, a circular-sector style is used for the visualization of the nodes.
Things to Try
Select one of the layout algorithms that support edge bundling using the combo-box in
the toolbar.
Modify the strength of the bundles using the slider in the toolbar and notice how this
change influences the shape of the curves of the bundled edges. Values close to
1 lead to tight bundles, while values close to 0 lead to
straight-line non-bundled edges.
Hover over an edge to highlight its path and its source and target nodes. The edges are
highlighted also with gradient colors from red (source node) to gold (target node).
Hover over a node to highlight its adjacent edges.
Right-click on a node to open a popup-menu and determine whether the edges adjacent to
the particular node or to all other currently selected nodes should be bundled or not.
Right-click on an edge to open a popup-menu and determine whether the particular edge or
all other currently edges should be bundled or not.
Note that the force-directed based routing of BundledEdgeRouter is not
recommended for large graphs since high values of bundling strength affect the routing
performance. Prefer one of the other two options instead.