1 use core::render::Renderer;
5 use sdl2::gfx::primitives::DrawRenderer;
6 use {SCREEN_HEIGHT, SCREEN_WIDTH};
10 fn draw(&self, renderer: &mut Renderer, size: u32);
13 pub struct SquareBoll {
18 impl Boll for SquareBoll {
19 fn update(&mut self) {
24 self.pos.x = -self.pos.x;
25 self.vel.x = -self.vel.x;
27 if self.pos.x > SCREEN_WIDTH as f64 {
28 self.pos.x = SCREEN_WIDTH as f64 - (self.pos.x - SCREEN_WIDTH as f64);
29 self.vel.x = -self.vel.x;
32 self.pos.y = -self.pos.y;
33 self.vel.y = -self.vel.y;
35 if self.pos.y > SCREEN_HEIGHT as f64 {
36 self.pos.y = SCREEN_HEIGHT as f64 - (self.pos.y - SCREEN_HEIGHT as f64);
37 self.vel.y = -self.vel.y;
41 fn draw(&self, renderer: &mut Renderer, size: u32) {
42 renderer.canvas().set_draw_color((
43 255 - std::cmp::min(255, (self.vel.length() * 25.0) as u8),
44 (255.0 * (self.pos.x / SCREEN_WIDTH as f64)) as u8,
45 (255.0 * (self.pos.y / SCREEN_HEIGHT as f64)) as u8,
48 let mut r = Rect::new(0, 0, size, size);
49 r.center_on((self.pos.x as i32, self.pos.y as i32));
50 renderer.canvas().fill_rect(r).unwrap();
54 pub struct CircleBoll {
59 pub fn new(pos: Point<f64>, vel: Point<f64>) -> CircleBoll {
61 boll: SquareBoll { pos, vel },
66 impl Boll for CircleBoll {
67 fn update(&mut self) {
71 fn draw(&self, renderer: &mut Renderer, size: u32) {
72 let val = 255 - std::cmp::min(255, (self.boll.vel.length() * 20.0) as u8);
76 self.boll.pos.x as i16,
77 self.boll.pos.y as i16,