Commit | Line | Data |
---|---|---|
296187ca TW |
1 | use sdl2::pixels::Color; |
2 | use sdl2::rect::Point; | |
3 | use sdl2::rect::Rect; | |
4 | use sdl2::render::Canvas; | |
5 | use sdl2::video::Window; | |
6 | ||
7 | use {SCREEN_HEIGHT, SCREEN_WIDTH}; | |
8 | use common::Point2D; | |
6c5dd5cf | 9 | use sdl2::gfx::primitives::DrawRenderer; |
296187ca | 10 | |
c315bb31 TW |
11 | pub trait Boll { |
12 | fn update(&mut self); | |
a4088bfb | 13 | fn draw(&self, canvas: &mut Canvas<Window>, size: u32); |
c315bb31 TW |
14 | } |
15 | ||
16 | pub struct SquareBoll { | |
296187ca TW |
17 | pub pos: Point2D<f64>, |
18 | pub vel: Point2D<f64>, | |
19 | } | |
20 | ||
c315bb31 TW |
21 | impl Boll for SquareBoll { |
22 | fn update(&mut self) { | |
296187ca TW |
23 | self.vel.y += 0.1; |
24 | self.pos += self.vel; | |
25 | ||
26 | if self.pos.x < 0.0 { | |
27 | self.pos.x = -self.pos.x; | |
28 | self.vel.x = -self.vel.x; | |
29 | } | |
30 | if self.pos.x > SCREEN_WIDTH as f64 { | |
31 | self.pos.x = SCREEN_WIDTH as f64 - (self.pos.x - SCREEN_WIDTH as f64); | |
32 | self.vel.x = -self.vel.x; | |
33 | } | |
34 | if self.pos.y < 0.0 { | |
35 | self.pos.y = -self.pos.y; | |
36 | self.vel.y = -self.vel.y; | |
37 | } | |
38 | if self.pos.y > SCREEN_HEIGHT as f64 { | |
39 | self.pos.y = SCREEN_HEIGHT as f64 - (self.pos.y - SCREEN_HEIGHT as f64); | |
40 | self.vel.y = -self.vel.y; | |
41 | } | |
42 | } | |
43 | ||
a4088bfb | 44 | fn draw(&self, canvas: &mut Canvas<Window>, size: u32) { |
296187ca TW |
45 | canvas.set_draw_color(Color::RGBA( |
46 | 255 - std::cmp::min(255, (self.vel.length() * 25.0) as u8), | |
47 | (255.0 * (self.pos.x / SCREEN_WIDTH as f64)) as u8, | |
48 | (255.0 * (self.pos.y / SCREEN_HEIGHT as f64)) as u8, 128 | |
49 | )); | |
50 | let mut r = Rect::new(0, 0, size, size); | |
51 | r.center_on(Point::new(self.pos.x as i32, self.pos.y as i32)); | |
52 | canvas.fill_rect(r).unwrap(); | |
53 | } | |
54 | } | |
6c5dd5cf TW |
55 | |
56 | ||
57 | pub struct CircleBoll { | |
58 | pub boll: SquareBoll, | |
59 | } | |
60 | ||
61 | impl CircleBoll { | |
62 | pub fn new(pos: Point2D<f64>, vel: Point2D<f64>) -> CircleBoll { | |
63 | CircleBoll { | |
64 | boll: SquareBoll { | |
65 | pos, | |
66 | vel, | |
67 | } | |
68 | } | |
69 | } | |
70 | } | |
71 | ||
72 | impl Boll for CircleBoll { | |
73 | fn update(&mut self) { | |
74 | self.boll.update(); | |
75 | } | |
76 | ||
a4088bfb | 77 | fn draw(&self, canvas: &mut Canvas<Window>, size: u32) { |
6c5dd5cf TW |
78 | let val = 255 - std::cmp::min(255, (self.boll.vel.length() * 20.0) as u8); |
79 | canvas.filled_circle(self.boll.pos.x as i16, self.boll.pos.y as i16, size as i16, Color::RGBA( | |
80 | val, | |
81 | val, | |
82 | val, | |
83 | 128, | |
84 | )).unwrap(); | |
85 | } | |
86 | } |