Wish list of improvements:

• Interactive collapsing of nodes (with remapping of links to the representative)
• Filter out only (k-steps removed) neighbors (plus their ancestors) and relayout
• Remove all links that are not direct neighbors or their ancestors on click
• Split links into smaller segments and color them into a gradient from source to target. Note that SVG gradients don't work because they always go in one direction (left-right, right-left, up-down or down-up). It might be possible with two gradients though.

Gradients based on this example

Hey @considerate , I was just wandering - why this PR is not yet merged? Is there any issues which needs to be looked at?

@Nisarg1112 I think in terms of rendering the edge bundles it works like intended. However, while using this it very early became clear to me that just showing the full callgraph as a nice picture like this isn't that useful - it requires some interactivity in order to keep the complex down enough to be graspable.

It also became clear to me that the d3 solution was getting difficult to maintain when the graph is updated. I wanted to create a version of this using something like React or Halogen so that the implementation didn't have to manage the mutable state so explicitly. However, I never got around to doing that.