1 use core::render::Renderer;
3 use sdl2::gfx::primitives::DrawRenderer;
5 use {SCREEN_HEIGHT, SCREEN_WIDTH};
9 fn draw(&self, renderer: &mut Renderer, size: u32);
12 pub struct SquareBoll {
17 impl Boll for SquareBoll {
18 fn update(&mut self) {
23 self.pos.x = -self.pos.x;
24 self.vel.x = -self.vel.x;
26 if self.pos.x > SCREEN_WIDTH as f64 {
27 self.pos.x = SCREEN_WIDTH as f64 - (self.pos.x - SCREEN_WIDTH as f64);
28 self.vel.x = -self.vel.x;
31 self.pos.y = -self.pos.y;
32 self.vel.y = -self.vel.y;
34 if self.pos.y > SCREEN_HEIGHT as f64 {
35 self.pos.y = SCREEN_HEIGHT as f64 - (self.pos.y - SCREEN_HEIGHT as f64);
36 self.vel.y = -self.vel.y;
40 fn draw(&self, renderer: &mut Renderer, size: u32) {
41 renderer.canvas().set_draw_color((
42 255 - std::cmp::min(255, (self.vel.length() * 25.0) as u8),
43 (255.0 * (self.pos.x / SCREEN_WIDTH as f64)) as u8,
44 (255.0 * (self.pos.y / SCREEN_HEIGHT as f64)) as u8,
47 let mut r = Rect::new(0, 0, size, size);
48 r.center_on((self.pos.x as i32, self.pos.y as i32));
49 renderer.canvas().fill_rect(r).unwrap();
53 pub struct CircleBoll {
58 pub fn new(pos: Point<f64>, vel: Point<f64>) -> CircleBoll {
60 boll: SquareBoll { pos, vel },
65 impl Boll for CircleBoll {
66 fn update(&mut self) {
70 fn draw(&self, renderer: &mut Renderer, size: u32) {
71 let val = 255 - std::cmp::min(255, (self.boll.vel.length() * 20.0) as u8);
75 self.boll.pos.x as i16,
76 self.boll.pos.y as i16,