Tetra

Tetra is a simple 2D game framework written in Rust. It uses SDL2 for event handling and OpenGL 3.2+ for rendering.

Note that Tetra is still extremely early in development! It may/will have bugs and missing features (the big ones currently being sound and gamepad support). That said, you're welcome to give it a go and let me know what you think :)

Features

• XNA/MonoGame-inspired API
• Efficient 2D rendering, with draw call batching by default
• Animations/spritesheets
• Pixel-perfect screen scaling
• Deterministic game loop, à la Fix Your Timestep.

Installation

To add Tetra to your project, add the following line to your Cargo.toml file:

tetra = "0.1"

You will also need to install the SDL2 native libraries, as described here.

Examples

To get a simple window displayed on screen, the following code can be used:

extern crate tetra;

use tetra::graphics::{self, Color};
use tetra::{Context, ContextBuilder, State};

struct GameState;

impl State for GameState {
    fn update(&mut self, _ctx: &mut Context) {}

    fn draw(&mut self, ctx: &mut Context, _dt: f64) {
        // Cornflour blue, as is tradition
        graphics::clear(ctx, Color::rgb(0.392, 0.584, 0.929));
    }
}

fn main() -> tetra::Result {
    let ctx = &mut ContextBuilder::new()
        .title("Hello, world!")
        .quit_on_escape(true)
        .build()?;

    let state = &mut GameState;

    tetra::run(ctx, state)
}

You can see this example in action by running cargo run --example hello_world.

The full list of examples available are:

• hello_world - Opens a window and clears it with a solid color.
• texture - Loads and displays a texture.
• animation - Displays an animation, made up of regions from a texture.
• nineslice - Slices a texture into nine segments to display a dialog box.
• keyboard - Moves a texture around based on keyboard input.
• mouse - Moves a texture around based on mouse input.
• tetras - A full example game (which is entirely legally distinct from a certain other block-based puzzle game cough).

Support/Feedback

As mentioned above, Tetra is fairly early in development, so there's likely to be bugs/flaky docs/general weirdness. Please feel free to leave an issue/PR if you find something!

You can also contact me via Twitter, or find me lurking in the #gamedev channel on the Rust Community Discord.