One of my favorite things about Processing is that you can interact with a simulation while it is running. Here is an example where a swarm of particles are advecting continually in a flow, and changing the shape of the foil changes the underlying velocity field. It’s great for education and outreach activities.
Observables in Makie and Pluto seem tantalizingly close to realizing this capability, but I haven’t seen this done anywhere and my attempt today failed. Are there some examples of this I’ve missed? Any ideas for where to start?