UI and Mouse Input

A user interface (UI) defines the interaction between a computer program and the user. In our game, our interaction so far has been limited to a keyboard interface that controls our player's spaceship. When we wrote our particle system configuration apps, we used HTML to define a more robust user interface, which allowed us to input values to configure our particle system. From that user interface, our code had to interact with the WebAssembly code indirectly. That is a technique you could continue to use for games if you wanted to leverage HTML to define your user interface, but it has a few disadvantages. First of all, we may want user interface elements that overlay the content of our game. Going through the DOM for this kind of effect is not very efficient. It is also easier to have interactions between our UI and objects from within the game if the...