main.rs

   1 use cgmath::conv::array4x4;
   2 use cgmath::{Euler, Matrix4, Rad, SquareMatrix, Vector3, Vector4, Zero};
   3 use glium::glutin::event::{ self, Event, VirtualKeyCode, WindowEvent };
   4 use glium::glutin::event_loop::{ ControlFlow };
   5 use glium::{Display, Program, Surface, uniform};
   6 use mandelwow_lib::*;
   7 use std::f32::consts::PI;
   8 use std::rc::Rc;
   9 use std::time::{Duration, Instant};
  10
  11 #[cfg(target_os = "emscripten")]
  12 use std::os::raw::{c_int, c_void};
  13
  14 fn gl_info(display: &glium::Display) {
  15     if cfg!(feature = "logging") {
  16         let version = *display.get_opengl_version();
  17         let api = match version {
  18             glium::Version(glium::Api::Gl, _, _) => "OpenGL",
  19             glium::Version(glium::Api::GlEs, _, _) => "OpenGL ES",
  20         };
  21         println!(
  22             "{} context verson: {}",
  23             api,
  24             display.get_opengl_version_string()
  25         );
  26     }
  27 }
  28
  29 const SEA_XSIZE: usize = 40;
  30 const SEA_ZSIZE: usize = 25;
  31
  32 struct World<'a> {
  33     display: Display,
  34
  35     mandelwow_program: Rc<Program>,
  36     mandelwow_bounds: Cube,
  37     mandelwow_bbox: BoundingBox,
  38     bounding_box_enabled: bool,
  39
  40     shaded_cube: ShadedCube,
  41     text: Text<'a>,
  42
  43     sea: [[Vector3<f32>; SEA_ZSIZE]; SEA_XSIZE],
  44
  45     // For the zoom animation synchronized to the drum-hits
  46     hit_time: f32,
  47     last_hit: f32,
  48 }
  49
  50 impl<'a> World<'a> {
  51     pub fn new(display: glium::Display) -> World<'a> {
  52         let mandelwow_program = Rc::new(mandelwow::program(&display));
  53         let bounding_box_program = Rc::new(bounding_box::solid_fill_program(&display));
  54         let shaded_program = Rc::new(shaded_cube::shaded_program(&display));
  55
  56         // These are the bounds for the 3D slice of the 4D Mandelwow
  57         let mandelwow_bounds = Cube {
  58             xmin: -2.0,
  59             xmax: 0.7,
  60             ymin: -1.0,
  61             ymax: 1.0,
  62             zmin: -1.1,
  63             zmax: 1.1,
  64         };
  65
  66         // Generate a wavy sea made of cubes
  67         let sea_xmin = -20.0f32;
  68         let sea_xmax = 20.0f32;
  69         let sea_y = -2.5;
  70         let sea_zmin = -2.0f32;
  71         let sea_zmax = -27.0f32;
  72         let sea_xstep = (sea_xmax - sea_xmin) / (SEA_XSIZE as f32);
  73         let sea_zstep = (sea_zmax - sea_zmin) / (SEA_ZSIZE as f32);
  74         println!("xstep={} ystep={:?}", sea_xstep, sea_zstep);
  75
  76         let mut sea = [[Vector3::zero(); SEA_ZSIZE]; SEA_XSIZE];
  77         for x in 0..SEA_XSIZE {
  78             for z in 0..SEA_ZSIZE {
  79                 sea[x][z] = Vector3 {
  80                     x: sea_xmin + (x as f32) * sea_xstep,
  81                     y: sea_y,
  82                     z: sea_zmin + (z as f32) * sea_zstep,
  83                 };
  84             }
  85         }
  86
  87         World {
  88             mandelwow_program,
  89             mandelwow_bbox: BoundingBox::new(
  90                 &display, &mandelwow_bounds, bounding_box_program.clone()),
  91             mandelwow_bounds,
  92             bounding_box_enabled: true,
  93
  94             shaded_cube: ShadedCube::new(&display, shaded_program.clone()),
  95             text: text::Text::new(&display),
  96             sea: sea,
  97
  98             hit_time: 0.0,
  99             last_hit: 0.0,
 100
 101             display,
 102         }
 103     }
 104
 105     fn draw_frame(
 106         &self,
 107         camera: &support::camera::CameraState,
 108         t: f32,
 109     ) {
 110         let perspview = camera.get_perspview();
 111
 112         let hit_delta = t - self.hit_time;
 113         let hit_scale = 1. / (1. + hit_delta * hit_delta * 15.0) + 1.;
 114
 115         // Vary the wow factor to slice the Mandelwow along its 4th dimension.
 116         let wmin = -0.8;
 117         let wmax = 0.8;
 118         let wsize = wmax - wmin;
 119         let wow = (((t * 0.7).sin() + 1.0) / 2.0) * wsize + wmin;
 120
 121         //println!("t={} w={:?} camera={:?}", t, w, camera.get_pos());
 122
 123         let mut frame = self.display.draw();
 124         frame.clear_color_and_depth((0.0, 0.0, 0.0, 1.0), 1.0);
 125
 126         let rotation = Matrix4::from(Euler {
 127             x: Rad(t.sin() / 3.),
 128             y: Rad(t.sin() / 2.),
 129             z: Rad(t / 1.5),
 130         });
 131         let z_trans = -3.0; // Send the model back a little bit so it fits the screen.
 132         let scale = Matrix4::from_diagonal(Vector4::new(hit_scale, hit_scale, hit_scale, 1.0));
 133         let model2 = Matrix4::from_translation(Vector3::unit_z() * z_trans) * rotation * scale;
 134         let model = array4x4(model2);
 135
 136         // Draw the bounding box before the fractal, when the Z-buffer is still clear,
 137         // so the lines behind the semi-translucent areas will be drawn.
 138         if self.bounding_box_enabled {
 139             let uniforms = uniform! {
 140                 model: model,
 141                 view:  camera.get_view(),
 142                 perspective: camera.get_perspective(),
 143             };
 144             self.mandelwow_bbox.draw(&mut frame, &uniforms);
 145         }
 146
 147         let text_rot = Matrix4::from_angle_x(cgmath::Deg(-90.0f32));
 148         let text_pos = Matrix4::from_translation(Vector3 {
 149             x: 0.0,
 150             y: 0.501,
 151             z: 0.0f32,
 152         }) * text_rot;
 153         for x in 0..SEA_XSIZE {
 154             for z in 0..SEA_ZSIZE {
 155                 let wave = ((x as f32 / SEA_XSIZE as f32 * PI * 5.0 + t * 2.0).sin()
 156                     + (z as f32 / SEA_ZSIZE as f32 * PI * 3.0 + t * 3.0).sin())
 157                     * 0.3;
 158                 let model = Matrix4::from_translation(
 159                     self.sea[x][z]
 160                         + Vector3 {
 161                             x: 0.,
 162                             y: wave,
 163                             z: 0.,
 164                         },
 165                 );
 166                 let uniforms = uniform! {
 167                     model: array4x4(model),
 168                     perspview: perspview,
 169                     col: [0., (1. - wave).abs() * 0.5,  wave.abs()],
 170                 };
 171                 self.shaded_cube.draw(&mut frame, &uniforms);
 172                 let model = model * text_pos;
 173                 let c = (x + z * SEA_XSIZE) as u8 as char;
 174                 self.text.draw(&mut frame, c, &model, &perspview);
 175             }
 176         }
 177
 178         mandelwow::draw(
 179             &self.display,
 180             &mut frame,
 181             &self.mandelwow_program,
 182             model,
 183             &camera,
 184             &self.mandelwow_bounds,
 185             wow,
 186         );
 187
 188         frame.finish().unwrap();
 189     }
 190 }
 191
 192
 193 #[cfg(target_os = "emscripten")]
 194 #[allow(non_camel_case_types)]
 195 type em_callback_func = unsafe extern "C" fn();
 196 #[cfg(target_os = "emscripten")]
 197 extern "C" {
 198     fn emscripten_set_main_loop(func: em_callback_func, fps: c_int, simulate_infinite_loop: c_int);
 199 }
 200
 201 #[cfg(target_os = "emscripten")]
 202 thread_local!(static MAIN_LOOP_CALLBACK: std::cell::RefCell<*mut c_void> =
 203               std::cell::RefCell::new(std::ptr::null_mut()));
 204
 205 #[cfg(target_os = "emscripten")]
 206 pub fn set_main_loop_callback<F>(callback: F)
 207 where
 208     F: FnMut() -> support::Action,
 209 {
 210     MAIN_LOOP_CALLBACK.with(|log| {
 211         *log.borrow_mut() = &callback as *const _ as *mut c_void;
 212     });
 213
 214     unsafe {
 215         emscripten_set_main_loop(wrapper::<F>, 0, 1);
 216     }
 217
 218     unsafe extern "C" fn wrapper<F>()
 219     where
 220         F: FnMut() -> support::Action,
 221     {
 222         MAIN_LOOP_CALLBACK.with(|z| {
 223             let closure = *z.borrow_mut() as *mut F;
 224             (*closure)();
 225         });
 226     }
 227 }
 228
 229 #[cfg(not(target_os = "emscripten"))]
 230 pub fn set_main_loop_callback<F>(callback: F)
 231 where
 232     F: FnMut() -> support::Action,
 233 {
 234     support::start_loop(callback);
 235 }
 236
 237 //extern crate gleam;
 238
 239 /*
 240 extern "C" {
 241     fn emscripten_GetProcAddress(
 242         name: *const ::std::os::raw::c_char,
 243     ) -> *const ::std::os::raw::c_void;
 244 }
 245 */
 246
 247 fn main() {
 248     /*
 249     let gl = gleam::gl::GlesFns::load_with(|addr| {
 250             let addr = std::ffi::CString::new(addr).unwrap();
 251             emscripten_GetProcAddress(addr.into_raw() as *const _) as *const _
 252         });
 253     gl.glGetInternalformativ(0, 0, 0, 0, 0);
 254     */
 255
 256     let mut soundplayer = sound::start();
 257
 258     let event_loop = glutin::event_loop::EventLoop::new();
 259     //let fullscreen = Some(glutin::window::Fullscreen::Borderless(event_loop.primary_monitor()));
 260     let window = glutin::window::WindowBuilder::new()
 261         //.with_dimensions(1280, 720)
 262         //.with_fullscreen(fullscreen);
 263         ;
 264     //.with_title("MandelWow");
 265     let context = glutin::ContextBuilder::new()
 266         //.with_gl_profile(glutin::GlProfile::Core)
 267         //.with_gl(glutin::GlRequest::Specific(glutin::Api::WebGl, (2, 0)))
 268         .with_gl(glutin::GlRequest::Specific(
 269             glutin::Api::OpenGlEs,
 270             (3, 0),
 271         ))
 272         //.with_gl(glutin::GlRequest::Specific(glutin::Api::OpenGl, (4, 0)))
 273         //.with_depth_buffer(24)
 274         .with_vsync(true);
 275
 276     let display = glium::Display::new(window, context, &event_loop).unwrap();
 277     gl_info(&display);
 278     let mut world = World::new(display);
 279
 280     let mut timer = Timer::new();
 281     let mut camera = support::camera::CameraState::new();
 282     let _fullscreen = true;
 283
 284     event_loop.run(move |event, _, control_flow| {
 285         let t = timer.t;
 286         let new_hit = sound::hit_event(&mut soundplayer);
 287         if new_hit > world.last_hit {
 288             world.hit_time = t;
 289         }
 290         world.last_hit = new_hit;
 291
 292         camera.update();
 293
 294         *control_flow = ControlFlow::WaitUntil(Instant::now() + Duration::from_nanos(16666667));
 295         match event {
 296             Event::NewEvents(cause) => {
 297                 match cause {
 298                     event::StartCause::ResumeTimeReached { .. } | event::StartCause::Init => {
 299                         world.draw_frame(&camera, t);
 300                     },
 301                     _ => {}
 302                 }
 303             } _ => (),
 304         }
 305         if let Event::WindowEvent { event, .. } = event {
 306             camera.process_input(&event);
 307             match event {
 308                 WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
 309                 WindowEvent::KeyboardInput { input, .. } => {
 310                     if input.state == event::ElementState::Pressed {
 311                         if let Some(key) = input.virtual_keycode {
 312                             match key {
 313                                 VirtualKeyCode::Escape | VirtualKeyCode::Q => {
 314                                     *control_flow = ControlFlow::Exit;
 315                                 }
 316                                 _ => (),
 317                             }
 318                         }
 319                     }
 320                 }
 321                 /*
 322                 KeyboardInput { input: glutin::KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::Escape), .. } } |
 323                 KeyboardInput { input: glutin::KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::Q), .. } } => {
 324                     *control_flow = ControlFlow::Exit;
 325                 },
 326                 KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::B) } => {
 327                     bounding_box_enabled ^= true;
 328                 },
 329                 KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::P) } => {
 330                     timer.pause ^= true;
 331                 },
 332                 KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::PageUp) } => {
 333                     timer.t += 0.01;
 334                 },
 335                 KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::PageDown) } => {
 336                     timer.t -= 0.01;
 337                 },
 338                 KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::F10) } => {
 339                     screenshot(&display);
 340                 },
 341                 KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::F11) } => {
 342                     fullscreen ^= true;
 343                     if fullscreen {
 344                         // Not implemented on Linux
 345                         glutin::WindowBuilder::new()
 346                             .with_fullscreen(glutin::get_primary_monitor())
 347                             .with_depth_buffer(24)
 348                             .rebuild_glium(&display).unwrap();
 349                     } else {
 350                         glutin::WindowBuilder::new()
 351                             .rebuild_glium(&display).unwrap();
 352                     }
 353                 },
 354                 */
 355                 _ => (),
 356             }
 357         }
 358
 359         timer.update();
 360     });
 361 }