yeah

Download the binary from the releases page. Create an input.txt file (see this repository's for an example). Open a terminal and run the binary in the directory containing input.txt.

Alternatively, install the Cargo package manager. Clone the repo and run cargo run in the top level (expr/) to compile and run (this may take a few minutes).

Drag to move and scroll to zoom. If you compiled the project, you can adjust scroll sensitivity on the last line of src/calculator.rs and recompile.

Edit input.txt and save to reload.

Press shift to toggle debug view of the functions.

You can define bindings (variables and functions) with ascii alphabetic letters. For example:

PI := 3.14
f(x) := x + sin(x)

Bindings must be defined before they are used.

Standalone expressions that contain an x will be plotted. Variable bindings and expressions that don't contain an x will be evaluated and printed.

Note every expression and binding has to be on a single line (for now).

• saving input.txt will sometimes load an empty graph
  • if this happens often, it may be easier to just run cargo run again
• zooming too far outside a graph in can cause sudden dramatic slowdowns and maybe crashes
  • this is caused by drawing lines far away from the viewport for some reason
• rectangular rendering artifacts can appear when drawing dense functions like x * sin(1000 / x)
• parts of functions that are very vertical (slope of >1000) will not be drawn
  • this is because they're treated as discontinuities