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 | 11 | use boll::*; |
6edafdc0 | 12 | use common::{Point2D, Rect}; |
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 | 18 | |
6edafdc0 TW |
19 | #[derive(Default)] |
20 | pub struct AppBuilder { | |
21 | resolution: Rect<u16>, | |
22 | fps: u8, | |
23 | state: Option<Box<dyn AppState>>, | |
24 | title: Option<String>, | |
3bfea951 TW |
25 | } |
26 | ||
6edafdc0 TW |
27 | impl AppBuilder { |
28 | pub fn with_resolution(mut self, width: u16, height: u16) -> Self { | |
29 | self.resolution = Rect { width, height }; | |
30 | self | |
31 | } | |
32 | ||
33 | pub fn with_fps(mut self, fps: u8) -> Self { | |
34 | unimplemented!() | |
35 | // self.fps = fps; | |
36 | // self | |
37 | } | |
38 | ||
39 | pub fn with_state(mut self, state: Box<dyn AppState>) -> Self { | |
40 | self.state = Some(state); | |
41 | self | |
42 | } | |
43 | ||
44 | pub fn with_title(mut self, title: &str) -> Self { | |
45 | self.title = Some(title.to_string()); | |
46 | self | |
47 | } | |
48 | ||
49 | pub fn start(self) -> App { | |
3bfea951 TW |
50 | let context = sdl2::init().unwrap(); |
51 | sdl2::image::init(sdl2::image::InitFlag::PNG).unwrap(); | |
6edafdc0 TW |
52 | let window = context |
53 | .video().unwrap() | |
54 | .window(&self.title.unwrap(), self.resolution.width.into(), self.resolution.height.into()) | |
3bfea951 TW |
55 | .position_centered() |
56 | .opengl() | |
6edafdc0 | 57 | .build().unwrap(); |
3bfea951 | 58 | context.mouse().show_cursor(false); |
6edafdc0 | 59 | |
3bfea951 TW |
60 | let mut canvas = window.into_canvas().build().unwrap(); |
61 | canvas.set_blend_mode(BlendMode::Add); | |
62 | canvas.set_draw_color(Color::RGB(0, 0, 0)); | |
63 | canvas.clear(); | |
64 | canvas.present(); | |
6edafdc0 | 65 | |
3bfea951 TW |
66 | let event_pump = context.event_pump().unwrap(); |
67 | let sprites = SpriteManager::new(canvas.texture_creator()); | |
6edafdc0 | 68 | |
3bfea951 TW |
69 | App { |
70 | canvas, | |
71 | event_pump, | |
72 | sprites, | |
6edafdc0 | 73 | state: self.state.unwrap_or(Box::new(ActiveState::new())), |
3bfea951 TW |
74 | } |
75 | } | |
6edafdc0 TW |
76 | } |
77 | ||
78 | pub struct App { | |
79 | pub canvas: Canvas<Window>, | |
80 | pub event_pump: EventPump, | |
81 | pub sprites: SpriteManager, | |
82 | pub state: Box<dyn AppState>, | |
83 | } | |
84 | ||
85 | impl App { | |
86 | pub fn new() -> AppBuilder { | |
87 | Default::default() | |
88 | } | |
3bfea951 | 89 | |
1e322944 | 90 | pub fn load_sprites(&mut self, sprites: &[(&str, &str)]) { |
3bfea951 TW |
91 | for (name, file) in sprites { |
92 | self.sprites.load(name, file); | |
93 | } | |
94 | } | |
95 | } | |
95e3e10d TW |
96 | |
97 | pub trait AppState { | |
98 | fn update(&mut self, dt: Nanoseconds); | |
99 | fn render(&self, canvas: &mut Canvas<Window>); | |
100 | fn leave(&self); | |
101 | fn on_event(&mut self, event: Event); | |
102 | } | |
103 | ||
104 | type Bollar = Vec<Box<dyn Boll>>; | |
105 | ||
106 | pub struct ActiveState { | |
107 | bolls: Bollar, | |
108 | boll_size: u32, | |
109 | } | |
110 | ||
111 | impl ActiveState { | |
6edafdc0 | 112 | pub fn new() -> ActiveState { |
95e3e10d TW |
113 | ActiveState { |
114 | bolls: Bollar::new(), | |
115 | boll_size: 1, | |
116 | } | |
117 | } | |
118 | ||
119 | fn change_boll_count(&mut self, delta: i32) { | |
120 | if delta > 0 { | |
121 | for _i in 0..delta { | |
122 | self.add_boll(); | |
123 | } | |
124 | } else if delta < 0 { | |
5cbbebbe | 125 | for _i in 0..(-delta) { |
95e3e10d TW |
126 | self.bolls.pop(); |
127 | } | |
128 | } | |
129 | } | |
130 | ||
131 | fn add_boll(&mut self) { | |
132 | let mut rng = rand::thread_rng(); | |
133 | self.bolls.push(Box::new(SquareBoll { | |
134 | pos: point!(rng.gen_range(0, SCREEN_WIDTH) as f64, rng.gen_range(0, SCREEN_HEIGHT) as f64), | |
135 | vel: point!(rng.gen_range(-2.0, 2.0), rng.gen_range(-2.0, 2.0)), | |
136 | })); | |
137 | } | |
138 | } | |
139 | ||
140 | impl AppState for ActiveState { | |
141 | fn update(&mut self, dt: Nanoseconds) { | |
93679b27 | 142 | for b in &mut self.bolls { |
95e3e10d TW |
143 | b.update(); |
144 | } | |
145 | ||
146 | match dt { | |
147 | ns if ns < (NS_PER_FRAME - 90_0000) as u64 => { self.change_boll_count(100) } | |
148 | ns if ns > (NS_PER_FRAME + 90_0000) as u64 => { self.change_boll_count(-100) } | |
149 | _ => {} | |
150 | } | |
151 | } | |
152 | ||
153 | fn render(&self, canvas: &mut Canvas<Window>) { | |
93679b27 | 154 | for b in &self.bolls { |
95e3e10d TW |
155 | b.draw(canvas, self.boll_size); |
156 | } | |
157 | } | |
158 | ||
159 | fn leave(&self) { | |
160 | println!("number of bolls: {}", self.bolls.len()); | |
161 | } | |
162 | ||
163 | fn on_event(&mut self, event: Event) { | |
164 | match event { | |
165 | Event::KeyDown { keycode: Some(Keycode::KpPlus), .. } => { self.boll_size = std::cmp::min(self.boll_size + 1, 32) } | |
166 | Event::KeyDown { keycode: Some(Keycode::KpMinus), .. } => { self.boll_size = std::cmp::max(self.boll_size - 1, 1) } | |
167 | Event::MouseMotion { x, y, .. } => { | |
168 | self.bolls.push(Box::new(CircleBoll::new( | |
169 | point!(x as f64, y as f64), | |
170 | point!(0.0, 0.0), | |
171 | ))) | |
172 | } | |
173 | _ => {} | |
174 | } | |
175 | } | |
176 | } |