create a 3d game engine in rust

Rust is an excellent language for developing a 3D game engine due to its performance, memory safety, and expressive syntax. In this answer, we will discuss the basic steps to create a 3D game engine in Rust.

Step 1: Choose a Graphics API

The first step is to choose a graphics API, which is a low-level interface for rendering graphics on the screen. Popular APIs include OpenGL, Vulkan, and DirectX. Once you have selected an API, you can use a Rust library dedicated to that API such as glium or gfx-rs.

Step 2: Create a Window

The next step is to create a window where the game will be rendered. Rust provides several libraries such as glium, winit, and glfw for creating a window.

main.rs
use winit::{Event, Window, WindowBuilder, EventsLoop};

let event_loop = EventsLoop::new();
let window = WindowBuilder::new().build(&event_loop).unwrap();

loop {
    event_loop.poll_events(|event| {
        match event {
            Event::WindowEvent { event, .. } => match event {
                // Handle window events
                _ => (),
            },
            _ => (),
        }
    });
}
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Step 3: Implement a Math Library

A 3D game engine requires a lot of vector and matrix operations for handling the position, rotation, and scaling of models. Implementing a math library is an essential step towards creating a 3D game engine. Rust provides several libraries such as nalgebra, cgmath, and glam for implementing linear algebra operations.

Step 4: Create a Renderer

The renderer is responsible for drawing the models and textures on the screen. It interacts with the graphics API to render the scene. An efficient renderer should minimize the number of API calls to provide better performance.

Step 5: Add Physics and Collision Detection

To create an engaging game, physics and collision detection are essential components. Rust has several libraries, such as nphysics, rapier, and ncollide for implementing physics and collision detection.

Implementing a 3D game engine in Rust requires a lot of work, but the result can be a high-performance and robust game engine.