+++ /dev/null
-use core::render::Renderer;
-use geometry::Point;
-use sdl2::gfx::primitives::DrawRenderer;
-use sdl2::rect::Rect;
-use {SCREEN_HEIGHT, SCREEN_WIDTH};
-
-pub trait Boll {
- fn update(&mut self);
- fn draw(&self, renderer: &mut Renderer, size: u32);
-}
-
-pub struct SquareBoll {
- pub pos: Point<f64>,
- pub vel: Point<f64>,
-}
-
-impl Boll for SquareBoll {
- fn update(&mut self) {
- self.vel.y += 0.1;
- self.pos += self.vel;
-
- if self.pos.x < 0.0 {
- self.pos.x = -self.pos.x;
- self.vel.x = -self.vel.x;
- }
- if self.pos.x > SCREEN_WIDTH as f64 {
- self.pos.x = SCREEN_WIDTH as f64 - (self.pos.x - SCREEN_WIDTH as f64);
- self.vel.x = -self.vel.x;
- }
- if self.pos.y < 0.0 {
- self.pos.y = -self.pos.y;
- self.vel.y = -self.vel.y;
- }
- if self.pos.y > SCREEN_HEIGHT as f64 {
- self.pos.y = SCREEN_HEIGHT as f64 - (self.pos.y - SCREEN_HEIGHT as f64);
- self.vel.y = -self.vel.y;
- }
- }
-
- fn draw(&self, renderer: &mut Renderer, size: u32) {
- renderer.canvas().set_draw_color((
- 255 - std::cmp::min(255, (self.vel.length() * 25.0) as u8),
- (255.0 * (self.pos.x / SCREEN_WIDTH as f64)) as u8,
- (255.0 * (self.pos.y / SCREEN_HEIGHT as f64)) as u8,
- 128,
- ));
- let mut r = Rect::new(0, 0, size, size);
- r.center_on((self.pos.x as i32, self.pos.y as i32));
- renderer.canvas().fill_rect(r).unwrap();
- }
-}
-
-pub struct CircleBoll {
- pub boll: SquareBoll,
-}
-
-impl CircleBoll {
- pub fn new(pos: Point<f64>, vel: Point<f64>) -> CircleBoll {
- CircleBoll {
- boll: SquareBoll { pos, vel },
- }
- }
-}
-
-impl Boll for CircleBoll {
- fn update(&mut self) {
- self.boll.update();
- }
-
- fn draw(&self, renderer: &mut Renderer, size: u32) {
- let val = 255 - std::cmp::min(255, (self.boll.vel.length() * 20.0) as u8);
- renderer
- .canvas()
- .filled_circle(
- self.boll.pos.x as i16,
- self.boll.pos.y as i16,
- size as i16,
- (val, val, val, 128),
- )
- .unwrap();
- }
-}