| 1 | use boll::*; |
| 2 | use common::{Point2D, Rect}; |
| 3 | use point; // defined in common, but loaded from main... |
| 4 | use rand::Rng; |
| 5 | use sdl2::event::{Event, WindowEvent}; |
| 6 | use sdl2::gfx::primitives::DrawRenderer; |
| 7 | use sdl2::keyboard::Keycode; |
| 8 | use sdl2::pixels::Color; |
| 9 | use sdl2::rect::Rect as SDLRect; |
| 10 | use sdl2::render::{BlendMode, Canvas}; |
| 11 | use sdl2::video::{FullscreenType, SwapInterval, Window}; |
| 12 | use sdl2::{EventPump, VideoSubsystem}; |
| 13 | use sprites::SpriteManager; |
| 14 | use std::f32::consts::PI; |
| 15 | use time::PreciseTime; |
| 16 | |
| 17 | pub type Nanoseconds = u64; |
| 18 | |
| 19 | const FPS: u32 = 60; |
| 20 | const NS_PER_FRAME: u32 = 1_000_000_000 / FPS; |
| 21 | |
| 22 | #[derive(Default)] |
| 23 | pub struct AppBuilder { |
| 24 | resolution: Rect<u16>, |
| 25 | state: Option<Box<dyn AppState>>, |
| 26 | title: Option<String>, |
| 27 | } |
| 28 | |
| 29 | impl AppBuilder { |
| 30 | pub fn with_resolution(mut self, width: u16, height: u16) -> Self { |
| 31 | self.resolution = Rect { width, height }; |
| 32 | self |
| 33 | } |
| 34 | |
| 35 | pub fn with_state(mut self, state: Box<dyn AppState>) -> Self { |
| 36 | self.state = Some(state); |
| 37 | self |
| 38 | } |
| 39 | |
| 40 | pub fn with_title(mut self, title: &str) -> Self { |
| 41 | self.title = Some(title.to_string()); |
| 42 | self |
| 43 | } |
| 44 | |
| 45 | pub fn build(self) -> Result<App, String> { |
| 46 | let context = sdl2::init().unwrap(); |
| 47 | sdl2::image::init(sdl2::image::InitFlag::PNG)?; |
| 48 | let video = context.video()?; |
| 49 | |
| 50 | self.print_video_display_modes(&video); |
| 51 | |
| 52 | let window = video |
| 53 | .window( |
| 54 | &self.title.unwrap(), |
| 55 | self.resolution.width.into(), |
| 56 | self.resolution.height.into(), |
| 57 | ) |
| 58 | .position_centered() |
| 59 | // .fullscreen() |
| 60 | // .fullscreen_desktop() |
| 61 | .opengl() |
| 62 | .build() |
| 63 | .unwrap(); |
| 64 | context.mouse().show_cursor(false); |
| 65 | |
| 66 | let mut canvas = window.into_canvas().build().unwrap(); |
| 67 | canvas.set_blend_mode(BlendMode::Add); |
| 68 | canvas.set_draw_color(Color::RGB(0, 0, 0)); |
| 69 | canvas.clear(); |
| 70 | canvas.present(); |
| 71 | |
| 72 | video.gl_set_swap_interval(SwapInterval::VSync)?; |
| 73 | |
| 74 | let event_pump = context.event_pump()?; |
| 75 | let sprites = SpriteManager::new(canvas.texture_creator()); |
| 76 | let screen = canvas.output_size().unwrap(); |
| 77 | |
| 78 | Ok(App { |
| 79 | canvas, |
| 80 | event_pump, |
| 81 | sprites, |
| 82 | state: self.state.unwrap_or_else(|| Box::new(ActiveState::new(screen))), |
| 83 | }) |
| 84 | } |
| 85 | |
| 86 | fn print_video_display_modes(&self, video: &VideoSubsystem) { |
| 87 | println!("video subsystem: {:?}", video); |
| 88 | println!("current_video_driver: {:?}", video.current_video_driver()); |
| 89 | for display in 0..video.num_video_displays().unwrap() { |
| 90 | println!( |
| 91 | "=== display {} - {} ===", |
| 92 | display, |
| 93 | video.display_name(display).unwrap() |
| 94 | ); |
| 95 | println!( |
| 96 | " display_bounds: {:?}", |
| 97 | video.display_bounds(display).unwrap() |
| 98 | ); |
| 99 | println!( |
| 100 | " num_display_modes: {:?}", |
| 101 | video.num_display_modes(display).unwrap() |
| 102 | ); |
| 103 | println!( |
| 104 | " desktop_display_mode: {:?}", |
| 105 | video.desktop_display_mode(display).unwrap() |
| 106 | ); |
| 107 | let current = video.current_display_mode(display).unwrap(); |
| 108 | println!( |
| 109 | " current_display_mode: {:?}", |
| 110 | current |
| 111 | ); |
| 112 | for idx in 0..video.num_display_modes(display).unwrap() { |
| 113 | let mode = video.display_mode(display, idx).unwrap(); |
| 114 | println!( |
| 115 | " {}{:2}: {:?}", |
| 116 | if mode == current { "*" } else { " " }, |
| 117 | idx, |
| 118 | mode |
| 119 | ); |
| 120 | } |
| 121 | } |
| 122 | println!("swap interval: {:?}", video.gl_get_swap_interval()); |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | pub struct App { |
| 127 | pub canvas: Canvas<Window>, |
| 128 | pub event_pump: EventPump, |
| 129 | pub sprites: SpriteManager, |
| 130 | pub state: Box<dyn AppState>, |
| 131 | } |
| 132 | |
| 133 | impl App { |
| 134 | #[allow(clippy::new_ret_no_self)] |
| 135 | pub fn new() -> AppBuilder { |
| 136 | Default::default() |
| 137 | } |
| 138 | |
| 139 | pub fn load_sprites(&mut self, sprites: &[(&str, &str)]) { |
| 140 | for (name, file) in sprites { |
| 141 | self.sprites.load(name, file); |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | pub fn start(&mut self) { |
| 146 | let mut frame_count: u64 = 0; |
| 147 | let mut fps_time = PreciseTime::now(); |
| 148 | let mut last_time = PreciseTime::now(); |
| 149 | |
| 150 | 'running: loop { |
| 151 | if let Err(_) = self.handle_events() { |
| 152 | break 'running; |
| 153 | } |
| 154 | |
| 155 | let duration = |
| 156 | last_time.to(PreciseTime::now()).num_nanoseconds().unwrap() as Nanoseconds; |
| 157 | last_time = PreciseTime::now(); |
| 158 | self.state.update(duration); |
| 159 | |
| 160 | self.render(); |
| 161 | |
| 162 | frame_count += 1; |
| 163 | if frame_count == FPS as u64 { |
| 164 | let duration = fps_time.to(PreciseTime::now()).num_nanoseconds().unwrap() as f64 |
| 165 | / 1_000_000_000.0; |
| 166 | println!("fps: {}", frame_count as f64 / duration); |
| 167 | frame_count = 0; |
| 168 | fps_time = PreciseTime::now(); |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | self.state.leave(); |
| 173 | } |
| 174 | |
| 175 | fn handle_events(&mut self) -> Result<(), ()> { |
| 176 | for event in self.event_pump.poll_iter() { |
| 177 | match event { |
| 178 | Event::Quit { .. } |
| 179 | | Event::KeyDown { |
| 180 | keycode: Some(Keycode::Escape), |
| 181 | .. |
| 182 | } => { |
| 183 | return Err(()) |
| 184 | } |
| 185 | Event::KeyDown { |
| 186 | keycode: Some(Keycode::F11), |
| 187 | .. |
| 188 | } => { |
| 189 | match self.canvas.window().fullscreen_state() { |
| 190 | FullscreenType::Off => self |
| 191 | .canvas |
| 192 | .window_mut() |
| 193 | .set_fullscreen(FullscreenType::Desktop), |
| 194 | _ => self.canvas.window_mut().set_fullscreen(FullscreenType::Off), |
| 195 | } |
| 196 | .unwrap(); |
| 197 | } |
| 198 | Event::Window { |
| 199 | win_event: WindowEvent::Resized(x, y), |
| 200 | .. |
| 201 | } => { |
| 202 | println!("window resized({}, {})", x, y) |
| 203 | } |
| 204 | Event::Window { |
| 205 | win_event: WindowEvent::Maximized, |
| 206 | .. |
| 207 | } => { |
| 208 | println!("window maximized") |
| 209 | } |
| 210 | Event::Window { |
| 211 | win_event: WindowEvent::Restored, |
| 212 | .. |
| 213 | } => { |
| 214 | println!("window restored") |
| 215 | } |
| 216 | Event::Window { |
| 217 | win_event: WindowEvent::Enter, |
| 218 | .. |
| 219 | } => { |
| 220 | println!("window enter") |
| 221 | } |
| 222 | Event::Window { |
| 223 | win_event: WindowEvent::Leave, |
| 224 | .. |
| 225 | } => { |
| 226 | println!("window leave") |
| 227 | } |
| 228 | Event::Window { |
| 229 | win_event: WindowEvent::FocusGained, |
| 230 | .. |
| 231 | } => { |
| 232 | println!("window focus gained") |
| 233 | } |
| 234 | Event::Window { |
| 235 | win_event: WindowEvent::FocusLost, |
| 236 | .. |
| 237 | } => { |
| 238 | println!("window focus lost") |
| 239 | } |
| 240 | _ => self.state.on_event(event), |
| 241 | } |
| 242 | } |
| 243 | Ok(()) |
| 244 | } |
| 245 | |
| 246 | fn render(&mut self) { |
| 247 | self.canvas.set_draw_color(Color::RGB(0, 0, 0)); |
| 248 | self.canvas.clear(); |
| 249 | self.state.render(&mut self.canvas, &mut self.sprites); |
| 250 | self.canvas.present(); |
| 251 | } |
| 252 | } |
| 253 | |
| 254 | pub trait AppState { |
| 255 | fn update(&mut self, dt: Nanoseconds); |
| 256 | fn render(&mut self, canvas: &mut Canvas<Window>, sprites: &mut SpriteManager); |
| 257 | fn leave(&self); |
| 258 | fn on_event(&mut self, event: Event); |
| 259 | } |
| 260 | |
| 261 | type Bollar = Vec<Box<dyn Boll>>; |
| 262 | |
| 263 | #[derive(Default)] |
| 264 | pub struct ActiveState { |
| 265 | screen: Rect<u32>, |
| 266 | bolls: Bollar, |
| 267 | boll_size: u32, |
| 268 | mario_angle: f64, |
| 269 | } |
| 270 | |
| 271 | impl ActiveState { |
| 272 | pub fn new(screen: (u32, u32)) -> ActiveState { |
| 273 | ActiveState { |
| 274 | bolls: Bollar::new(), |
| 275 | boll_size: 1, |
| 276 | screen: Rect::from(screen), |
| 277 | ..Default::default() |
| 278 | } |
| 279 | } |
| 280 | |
| 281 | fn change_boll_count(&mut self, delta: i32) { |
| 282 | #[allow(clippy::comparison_chain)] |
| 283 | if delta > 0 { |
| 284 | for _i in 0..delta { |
| 285 | self.add_boll(); |
| 286 | } |
| 287 | } else if delta < 0 { |
| 288 | for _i in 0..(-delta) { |
| 289 | self.bolls.pop(); |
| 290 | } |
| 291 | } |
| 292 | } |
| 293 | |
| 294 | fn add_boll(&mut self) { |
| 295 | let mut rng = rand::thread_rng(); |
| 296 | self.bolls.push(Box::new(SquareBoll { |
| 297 | pos: point!( |
| 298 | rng.gen_range(0, self.screen.width) as f64, |
| 299 | rng.gen_range(0, self.screen.height) as f64 |
| 300 | ), |
| 301 | vel: point!(rng.gen_range(-2.0, 2.0), rng.gen_range(-2.0, 2.0)), |
| 302 | })); |
| 303 | } |
| 304 | } |
| 305 | |
| 306 | impl AppState for ActiveState { |
| 307 | fn update(&mut self, dt: Nanoseconds) { |
| 308 | for b in &mut self.bolls { |
| 309 | b.update(); |
| 310 | } |
| 311 | |
| 312 | match dt { |
| 313 | ns if ns < (NS_PER_FRAME - 90_0000) as u64 => self.change_boll_count(100), |
| 314 | ns if ns > (NS_PER_FRAME + 90_0000) as u64 => self.change_boll_count(-100), |
| 315 | _ => {} |
| 316 | } |
| 317 | } |
| 318 | |
| 319 | fn render(&mut self, canvas: &mut Canvas<Window>, sprites: &mut SpriteManager) { |
| 320 | /* draw square of blocks */ { |
| 321 | let blocks = 20; |
| 322 | let size = 32; |
| 323 | let offset = point!( |
| 324 | (self.screen.width as i32 - (blocks + 1) * size) / 2, |
| 325 | (self.screen.height as i32 - (blocks + 1) * size) / 2 |
| 326 | ); |
| 327 | let block = sprites.get("block"); |
| 328 | for i in 0..blocks { |
| 329 | canvas |
| 330 | .copy( |
| 331 | block, |
| 332 | None, |
| 333 | SDLRect::new((i) * size + offset.x, offset.y, size as u32, size as u32), |
| 334 | ) |
| 335 | .unwrap(); |
| 336 | canvas |
| 337 | .copy( |
| 338 | block, |
| 339 | None, |
| 340 | SDLRect::new( |
| 341 | (blocks - i) * size + offset.x, |
| 342 | (blocks) * size + offset.y, |
| 343 | size as u32, |
| 344 | size as u32, |
| 345 | ), |
| 346 | ) |
| 347 | .unwrap(); |
| 348 | canvas |
| 349 | .copy( |
| 350 | block, |
| 351 | None, |
| 352 | SDLRect::new( |
| 353 | offset.x, |
| 354 | (blocks - i) * size + offset.y, |
| 355 | size as u32, |
| 356 | size as u32, |
| 357 | ), |
| 358 | ) |
| 359 | .unwrap(); |
| 360 | canvas |
| 361 | .copy( |
| 362 | block, |
| 363 | None, |
| 364 | SDLRect::new( |
| 365 | (blocks) * size + offset.x, |
| 366 | (i) * size + offset.y, |
| 367 | size as u32, |
| 368 | size as u32, |
| 369 | ), |
| 370 | ) |
| 371 | .unwrap(); |
| 372 | } |
| 373 | } |
| 374 | |
| 375 | /* draw mario */ { |
| 376 | let size = 64; |
| 377 | let offset = point!( |
| 378 | (self.screen.width as i32 - size) / 2, |
| 379 | (self.screen.height as i32 - size) / 2 |
| 380 | ); |
| 381 | let radius = 110.0 + size as f32 * 0.5; |
| 382 | let angle = (self.mario_angle as f32 - 90.0) * PI / 180.0; |
| 383 | let offset2 = point!((angle.cos() * radius) as i32, (angle.sin() * radius) as i32); |
| 384 | canvas |
| 385 | .copy_ex( |
| 386 | sprites.get("mario"), |
| 387 | None, |
| 388 | SDLRect::new( |
| 389 | offset.x + offset2.x, |
| 390 | offset.y + offset2.y, |
| 391 | size as u32, |
| 392 | size as u32, |
| 393 | ), |
| 394 | self.mario_angle, |
| 395 | sdl2::rect::Point::new(size / 2, size / 2), |
| 396 | false, |
| 397 | false, |
| 398 | ) |
| 399 | .unwrap(); |
| 400 | self.mario_angle = (self.mario_angle + 1.0) % 360.0; |
| 401 | } |
| 402 | |
| 403 | /* draw circles and ellipses*/ { |
| 404 | let p = point!((self.screen.width / 2) as i16, (self.screen.height / 2) as i16); |
| 405 | canvas |
| 406 | .circle(p.x, p.y, 100, Color::RGB(255, 255, 255)) |
| 407 | .unwrap(); |
| 408 | canvas |
| 409 | .aa_circle(p.x, p.y, 110, Color::RGB(255, 255, 255)) |
| 410 | .unwrap(); |
| 411 | canvas |
| 412 | .ellipse(p.x, p.y, 50, 100, Color::RGB(255, 255, 255)) |
| 413 | .unwrap(); |
| 414 | canvas |
| 415 | .aa_ellipse(p.x, p.y, 110, 55, Color::RGB(255, 255, 255)) |
| 416 | .unwrap(); |
| 417 | } |
| 418 | |
| 419 | for b in &self.bolls { |
| 420 | b.draw(canvas, self.boll_size); |
| 421 | } |
| 422 | } |
| 423 | |
| 424 | fn leave(&self) { |
| 425 | println!("number of bolls: {}", self.bolls.len()); |
| 426 | } |
| 427 | |
| 428 | fn on_event(&mut self, event: Event) { |
| 429 | match event { |
| 430 | Event::KeyDown { |
| 431 | keycode: Some(Keycode::KpPlus), |
| 432 | .. |
| 433 | } => self.boll_size = std::cmp::min(self.boll_size + 1, 32), |
| 434 | Event::KeyDown { |
| 435 | keycode: Some(Keycode::KpMinus), |
| 436 | .. |
| 437 | } => self.boll_size = std::cmp::max(self.boll_size - 1, 1), |
| 438 | Event::MouseMotion { x, y, .. } => self.bolls.push(Box::new(CircleBoll::new( |
| 439 | point!(x as f64, y as f64), |
| 440 | point!(0.0, 0.0), |
| 441 | ))), |
| 442 | _ => {} |
| 443 | } |
| 444 | } |
| 445 | } |