Commit | Line | Data |
---|---|---|
95e3e10d TW |
1 | use rand::Rng; |
2 | use sdl2::event::Event; | |
3bfea951 | 3 | use sdl2::EventPump; |
95e3e10d | 4 | use sdl2::keyboard::Keycode; |
3bfea951 TW |
5 | use sdl2::pixels::Color; |
6 | use sdl2::render::BlendMode; | |
7 | use sdl2::render::Canvas; | |
8 | use sdl2::video::Window; | |
9 | ||
9c06350b | 10 | use ::{SCREEN_HEIGHT, SCREEN_WIDTH}; |
95e3e10d TW |
11 | use boll::*; |
12 | use common::Point2D; | |
3bfea951 | 13 | use sprites::SpriteManager; |
95e3e10d | 14 | use NS_PER_FRAME; |
787dbfb4 | 15 | use point; // defined in common, but loaded from main... |
95e3e10d TW |
16 | |
17 | pub type Nanoseconds = u64; | |
3bfea951 TW |
18 | |
19 | pub struct App { | |
20 | pub canvas: Canvas<Window>, | |
21 | pub event_pump: EventPump, | |
22 | pub sprites: SpriteManager, | |
9c06350b | 23 | pub state: Box<dyn AppState>, |
3bfea951 TW |
24 | } |
25 | ||
26 | impl App { | |
27 | pub fn new() -> App { | |
28 | let context = sdl2::init().unwrap(); | |
29 | sdl2::image::init(sdl2::image::InitFlag::PNG).unwrap(); | |
30 | let window = context.video().unwrap().window("SDL test", SCREEN_WIDTH, SCREEN_HEIGHT) | |
31 | .position_centered() | |
32 | .opengl() | |
33 | .build() | |
34 | .unwrap(); | |
35 | context.mouse().show_cursor(false); | |
36 | let mut canvas = window.into_canvas().build().unwrap(); | |
37 | canvas.set_blend_mode(BlendMode::Add); | |
38 | canvas.set_draw_color(Color::RGB(0, 0, 0)); | |
39 | canvas.clear(); | |
40 | canvas.present(); | |
41 | let event_pump = context.event_pump().unwrap(); | |
42 | let sprites = SpriteManager::new(canvas.texture_creator()); | |
43 | App { | |
44 | canvas, | |
45 | event_pump, | |
46 | sprites, | |
95e3e10d | 47 | state: Box::new(ActiveState::new()), |
3bfea951 TW |
48 | } |
49 | } | |
50 | ||
51 | pub fn load_sprites(&mut self, sprites: &[(&'static str, &str)]) { | |
52 | for (name, file) in sprites { | |
53 | self.sprites.load(name, file); | |
54 | } | |
55 | } | |
56 | } | |
95e3e10d TW |
57 | |
58 | pub trait AppState { | |
59 | fn update(&mut self, dt: Nanoseconds); | |
60 | fn render(&self, canvas: &mut Canvas<Window>); | |
61 | fn leave(&self); | |
62 | fn on_event(&mut self, event: Event); | |
63 | } | |
64 | ||
65 | type Bollar = Vec<Box<dyn Boll>>; | |
66 | ||
67 | pub struct ActiveState { | |
68 | bolls: Bollar, | |
69 | boll_size: u32, | |
70 | } | |
71 | ||
72 | impl ActiveState { | |
73 | fn new() -> ActiveState { | |
74 | ActiveState { | |
75 | bolls: Bollar::new(), | |
76 | boll_size: 1, | |
77 | } | |
78 | } | |
79 | ||
80 | fn change_boll_count(&mut self, delta: i32) { | |
81 | if delta > 0 { | |
82 | for _i in 0..delta { | |
83 | self.add_boll(); | |
84 | } | |
85 | } else if delta < 0 { | |
5cbbebbe | 86 | for _i in 0..(-delta) { |
95e3e10d TW |
87 | self.bolls.pop(); |
88 | } | |
89 | } | |
90 | } | |
91 | ||
92 | fn add_boll(&mut self) { | |
93 | let mut rng = rand::thread_rng(); | |
94 | self.bolls.push(Box::new(SquareBoll { | |
95 | pos: point!(rng.gen_range(0, SCREEN_WIDTH) as f64, rng.gen_range(0, SCREEN_HEIGHT) as f64), | |
96 | vel: point!(rng.gen_range(-2.0, 2.0), rng.gen_range(-2.0, 2.0)), | |
97 | })); | |
98 | } | |
99 | } | |
100 | ||
101 | impl AppState for ActiveState { | |
102 | fn update(&mut self, dt: Nanoseconds) { | |
93679b27 | 103 | for b in &mut self.bolls { |
95e3e10d TW |
104 | b.update(); |
105 | } | |
106 | ||
107 | match dt { | |
108 | ns if ns < (NS_PER_FRAME - 90_0000) as u64 => { self.change_boll_count(100) } | |
109 | ns if ns > (NS_PER_FRAME + 90_0000) as u64 => { self.change_boll_count(-100) } | |
110 | _ => {} | |
111 | } | |
112 | } | |
113 | ||
114 | fn render(&self, canvas: &mut Canvas<Window>) { | |
93679b27 | 115 | for b in &self.bolls { |
95e3e10d TW |
116 | b.draw(canvas, self.boll_size); |
117 | } | |
118 | } | |
119 | ||
120 | fn leave(&self) { | |
121 | println!("number of bolls: {}", self.bolls.len()); | |
122 | } | |
123 | ||
124 | fn on_event(&mut self, event: Event) { | |
125 | match event { | |
126 | Event::KeyDown { keycode: Some(Keycode::KpPlus), .. } => { self.boll_size = std::cmp::min(self.boll_size + 1, 32) } | |
127 | Event::KeyDown { keycode: Some(Keycode::KpMinus), .. } => { self.boll_size = std::cmp::max(self.boll_size - 1, 1) } | |
128 | Event::MouseMotion { x, y, .. } => { | |
129 | self.bolls.push(Box::new(CircleBoll::new( | |
130 | point!(x as f64, y as f64), | |
131 | point!(0.0, 0.0), | |
132 | ))) | |
133 | } | |
134 | _ => {} | |
135 | } | |
136 | } | |
137 | } |