128 lines
3.3 KiB
Rust
128 lines
3.3 KiB
Rust
extern crate sdl2;
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use sdl2::video::{Window, WindowPos, OPENGL};
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use sdl2::event::{poll_event, Event};
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use sdl2::timer::{get_ticks};
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use sdl2::rect::{Rect};
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const SCREEN_WIDTH : int = 800;
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const SCREEN_HEIGHT : int = 600;
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const MS_PER_UPDATE : uint = 10;
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struct Player {
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x: f32,
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y: f32,
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vel_x: f32,
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vel_y: f32,
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gravity: f32,
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}
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impl Player {
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fn new(x: f32, y: f32) -> Player {
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Player { x: x, y: y, vel_x: 0.0, vel_y: 0.0, gravity: 0.3 }
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}
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pub fn update(&mut self) {
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self.vel_y += self.gravity;
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self.x += self.vel_x;
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self.y += self.vel_y;
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}
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pub fn render(&self, renderer: &sdl2::render::Renderer) {
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let player = Rect::new(self.x as i32, self.y as i32, 10, 10);
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let _ = renderer.set_draw_color(sdl2::pixels::Color::RGB(0, 255, 0));
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let _ = renderer.fill_rect(&player);
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}
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}
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fn main() {
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sdl2::init(sdl2::INIT_EVERYTHING);
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let window = match Window::new("SMB", WindowPos::PosCentered, WindowPos::PosCentered, SCREEN_WIDTH, SCREEN_HEIGHT, OPENGL) {
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Ok(window) => window,
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Err(err) => panic!("failed to create window: {}", err)
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};
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let renderer = match sdl2::render::Renderer::from_window(window, sdl2::render::RenderDriverIndex::Auto, sdl2::render::ACCELERATED) {
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Ok(renderer) => renderer,
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Err(err) => panic!("failed to create renderer: {}", err)
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};
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let mut player = Player::new(390.0, 290.0);
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let mut on_ground = true;
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let mut current : uint = 0;
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let mut elapsed : uint = 0;
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let mut lag : uint = 0;
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let mut previous : uint = get_ticks();
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loop {
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current = get_ticks();
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elapsed = current - previous;
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previous = current;
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lag += elapsed;
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match poll_event() {
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Event::Quit(_) => break,
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Event::KeyDown(_, _, key, _, _, _) => {
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if key == sdl2::keycode::KeyCode::Escape {
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break;
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} else if key == sdl2::keycode::KeyCode::Right {
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player.vel_x = 4.0;
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} else if key == sdl2::keycode::KeyCode::Left {
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player.vel_x = -4.0;
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} else if key == sdl2::keycode::KeyCode::Up {
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if on_ground {
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player.vel_y = -8.0;
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on_ground = false;
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}
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}
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},
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Event::KeyUp(_, _, key, _, _, _) => {
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if key == sdl2::keycode::KeyCode::Right {
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player.vel_x = 0.0;
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} else if key == sdl2::keycode::KeyCode::Left {
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player.vel_x = 0.0;
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} else if key == sdl2::keycode::KeyCode::Up {
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if player.vel_y < -4.0 {
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player.vel_y = -4.0;
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}
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}
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},
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_ => (),
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}
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while lag >= MS_PER_UPDATE {
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player.update();
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if player.y > 290.0 {
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player.y = 290.0;
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player.vel_y = 0.0;
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on_ground = true;
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}
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lag -= MS_PER_UPDATE;
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}
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let _ = renderer.set_draw_color(sdl2::pixels::Color::RGB(0, 0, 0));
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let _ = renderer.clear();
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player.render(&renderer);
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renderer.present();
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}
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sdl2::quit();
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}
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