3. Basic Game Loop and Window Setup

Let's dive straight in and create a basic game loop.

// src/main.odin
package main

import rl "core:raylib"

main :: proc() {
    // a lot of stuff happens behind the scenes in this single call
    // - a graphics API context is created (usually OpenGL)
    // - input handling is set up
    // - default shaders are created
    // - a window is requested from the operating system
    rl.InitWindow(640, 360, "Program Video Games!")

    // this loop repeats until we press Esc or close the window
    for !rl.WindowShouldClose() {
        // begin drawing gets Raylib read to receive draw calls
        rl.BeginDrawing()
        // clear background makes sure to wipe everything with on solid colour
        // if we don't do this, what was drawn last frame will stay there
        // and we get a "smearing" effect from moving objects
        rl.ClearBackground(rl.BLACK)
        // when we are done calling our drawing procedures we signal that by
        // calling this procedure
        rl.EndDrawing()
    }
}

The code is exactly the same as what was shown in the introduction, just with the comments to explain it.

We'll go more in-depth into different aspects of a game loop later.

For now, it's enough to get up and running.