Thank you for linking your project—that looks really cool! I saw you also implemented a pan-and-zoom area. We are currently working on moving Rerun's implementation to egui [0], so maybe keep an eye on that.
It would be super cool to have layered graph drawing in (Sugiyama-style) in Rerun too. The tricky–but super interesting–challenge that we face is that our layout implementations need to be consistent across timestamps if the underlying structure of the graph changes, which is why we initially chose a force-based layout approach. There, the time-varying aspect is handled naturally by the simulation.
The very interactive nature of Rerun also poses more restrictions on the implementation of our algorithms: re-layouts ideally need to be fast, to produce visualizations quickly, especially when scrubbing the timeline.
I still hope we can rid you of some of the todos ;).
[0](https://github.com/emilk/egui/pull/5505)
