[jgoertler]

Custom visualizers are also supported—in fact the graph view started out as an external visualizer.

Here is a tutorial: https://rerun.io/docs/howto/visualization/extend-ui#custom-v...

And here is the corresponding code example: https://github.com/rerun-io/rerun/tree/main/examples/rust/cu...

To write your own graph visualization, you can look into the implementation of our graph view: https://github.com/rerun-io/rerun/tree/main/crates/viewer/re...

In the future we want to provide more types of layouts, dataflow is high up on that list. May I ask what kind of data you want to visualize? Since you mentioned Sankeys, in your case does the structure of the Sankey change as well, or do you only expect the edges to grow/shrink over time?

[troelsSteegin]

Thank you for your reply. I am thinking about variable dataflows through a fixed set of nodes -- so, the latter, growing and shrinking edges. The application would be visualizing system dynamics. The stages in the Sankey would be organized by degree of distance from an "intervention" node.

[jgoertler]

That's very interesting! We're currently working on the plumbing to be able to assign attributes to edges as well—right now it's only possible to style/configure the nodes.

Once we have that though, there is another approach that you can take before you go down the path of writing your own visualizer/view: you can also log custom positions for each node. Since the node positions don't change in your case that might get you quite far by statically logging the nodes with a Sankey layout computed by your application.