Write a data logger!

It would be great to be able to have the interactive mode generate time-series data for various details, such as frame rate, center of the window, ... this would be really useful for improving that feature over time.

Here is an idea for how this could work. We're dealing with a small number of variables and duration, so it is probably fine to just write lines to a CSV file. Each column would be a single variable, which would be registered with a name (potentially other metadata) and a callback. The callback would be called by a central system each time a row of the CSV would be generated, and each variable would generate a text representation for its value. For now, only support scalar data.

Once the data is in a CSV, then it would be trivial to plot it with rust (or python).

Also, check to see if there is a standard rust library for this type of data logging.

Start by locating the interactive mode and reviewing how its state and frame updates are handled. Compare available Rust libraries for CSV or data logging before settling on an approach. Done should include a defined way to register scalar variables and callbacks, generate time-series CSV rows, and identify initial values such as frame rate and window center.