glplotter draws graphs. It can generate graphs of various functions (you can specify any mathematical expression as function expression, e.g. "sin(x) + x^2"). It can also load a graph from a file.
This repository also includes gen_function, a command-line program that generates graph file from given function expression.
Complete documentation on https://castle-engine.io/glplotter.php .
Using Castle Game Engine, see https://castle-engine.io/ .
GNU GPL >= 2.