PONG
====

Made for Global Game Jam 2021 at LiU Game Jam's site.

The language wasn't really ready for a normal game so we wanted to make Pong
(the easiest game we could think of) while fixing what we needed to make it
work.

Building
--------

Clone the entire tihdy-repo, cd into the pong-directory and then cargo run.

Modifying
---------

All game logic is located in pong.tdy. Most of the configuration should be
straight forward. If you want to modify the controls, you need to change both
the string passed from pong.tdy as well as the respective function in src/main.rs
(key_down).

If you want to add more rust functions (for example, to draw text to the screen)
you need to add it like the already existing functions. All functions need a
return type and a return value, even if it is a Type::Void and Value::Nil. (See
e.g. clear for an example.) For a draw_text you probably want to take a
Value::String(s), Value::Float(x), Value::Float(y) and so on. Inside the block
you then write your normal Rusty code.

After writing your function you also need to link it so you can use it from the
game file. Add it to 'functions' like the other linked functions inside main()
in src/main.rs.

After linking, the only thing left to do is call it from the game logic. You'll
get a type error if you pass the wrong parameters. Additional parameter
combinations can be set (much like normal function overloading) should you have
the need by adding more "arms" to the extern_function!().