An implementation of Danny Holten's hierarchical edge bundling algorithm in D3, showing dependencies between classes in a software class hierarchy. Dependencies are bundled according to the parent packages. This example uses two layouts: a radial d3.layout.cluster to position the tree nodes, and d3.layout.bundle to group the dependencies into spline bundles. Thanks to Jason Davies for contributing the layout implementation!

Compare to this treemap layout.

See also the interactive version with link highlighting!