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2026-05-25 17:59:15 +02:00
commit 4b4f0c529a
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/target

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1
RustDemo Submodule

Submodule RustDemo added at aab05ac73a

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use sdl3::event::Event;
use sdl3::keyboard::Keycode;
use sdl3::rect::Rect;
use std::time::Duration;
use rand::RngExt;
const WINDOW_TITLE: &str = "Rust SDL3 Demo";
const WINDOW_WIDTH: i32 = 800;
const WINDOW_HEIGHT: i32 = 600;
const BACKGROUND_COLOR: sdl3::pixels::Color = sdl3::pixels::Color::RGB(30, 30, 30);
struct Ball {
x: i32,
y: i32,
velocity_x: i32,
velocity_y: i32,
radius: i32,
color: sdl3::pixels::Color,
}
impl Ball {
fn new(x: i32, y: i32, radius: i32, velocity_x: i32, velocity_y: i32, color: sdl3::pixels::Color) -> Self {
Self { x, y, velocity_x, velocity_y, radius, color }
}
fn update(&mut self, window_width: i32, window_height: i32) {
self.x += self.velocity_x;
self.y += self.velocity_y;
if self.x - self.radius <= 0 || self.x + self.radius >= window_width { self.velocity_x = -self.velocity_x; }
if self.y - self.radius <= 0 || self.y + self.radius >= window_height { self.velocity_y = -self.velocity_y; }
}
fn draw(&self, canvas: &mut sdl3::render::Canvas<impl sdl3::render::RenderTarget>) {
canvas.set_draw_color(self.color);
for dy in -self.radius..=self.radius {
let dx_sq = self.radius * self.radius - dy * dy;
if dx_sq < 0 { continue; }
let dx = (dx_sq as f64).sqrt() as i32;
let x1 = self.x - dx;
let y = self.y + dy;
let w = dx * 2 + 1;
let _ = canvas.fill_rect(Rect::new(x1, y, w as u32, 1));
}
}
}
fn main() -> Result<(), Box<dyn std::error::Error>> {
let sdl = sdl3::init()?;
let video = sdl.video()?;
let window = video
.window(WINDOW_TITLE, WINDOW_WIDTH as u32, WINDOW_HEIGHT as u32)
.position_centered()
.build()?;
let mut canvas = window.into_canvas();
let mut event_pump = sdl.event_pump()?;
let mut randomgenerator = rand::rng();
let mut ball_1 = Ball::new(randomgenerator.random_range(0..WINDOW_WIDTH), randomgenerator.random_range(0..WINDOW_HEIGHT), 14, 4, 3, sdl3::pixels::Color::RGB(0, 255, 0));
let mut ball_2 = Ball::new(randomgenerator.random_range(0..WINDOW_WIDTH), randomgenerator.random_range(0..WINDOW_HEIGHT), 14, 4, 3, sdl3::pixels::Color::RGB(255, 0, 0));
let mut ball_3 = Ball::new(randomgenerator.random_range(0..WINDOW_WIDTH), randomgenerator.random_range(0..WINDOW_HEIGHT), 14, 4, 3, sdl3::pixels::Color::RGB(255, 0, 255));
'running: loop {
for event in event_pump.poll_iter() {
match event {
Event::Quit { .. } | Event::KeyDown { keycode: Some(Keycode::Escape), .. } => break 'running,
_ => {}
}
}
ball_1.update(WINDOW_WIDTH, WINDOW_HEIGHT);
ball_2.update(WINDOW_WIDTH, WINDOW_HEIGHT);
ball_3.update(WINDOW_WIDTH, WINDOW_HEIGHT);
canvas.set_draw_color(BACKGROUND_COLOR);
canvas.clear();
ball_1.draw(&mut canvas);
ball_2.draw(&mut canvas);
ball_3.draw(&mut canvas);
canvas.present();
std::thread::sleep(Duration::from_millis(1000 / 60));
}
Ok(())
}