Now that we have sprites and animations, and can move these sprites around our canvas, we will need to add some interaction into our game. There are a few ways we can get keyboard input for our game. One way is through JavaScript, making calls to different functions in our WebAssembly module based on that input. The first section of our code will do just that. We will add some functions inside the WebAssembly module for us to wrap in JavaScript wrappers. We will also set up some JavaScript keyboard event handlers that we will use to make calls into our WebAssembly module whenever the keyboard events are triggered.
The other way we can get input into our WebAssembly module is to allow SDL to do all the heavy lifting for us. That involves adding C code into our WebAssembly module that captures the SDL_KEYDOWN and SDL_KEYUP events. The module will then look at the...
