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 {
  33     mandelwow_program: Rc<Program>,
  34     mandelwow_bounds: Cube,
  35     mandelwow_bbox: BoundingBox,
  36     bounding_box_enabled: bool,
  37
  38     shaded_cube: ShadedCube,
  39     text: Text,
  40
  41     sea: [[Vector3<f32>; SEA_ZSIZE]; SEA_XSIZE],
  42
  43     // For the zoom animation synchronized to the drum-hits
  44     hit_time: f32,
  45     last_hit: f32,
  46 }
  47
  48 impl World {
  49     pub fn new(display: &glium::Display) -> World {
  50         let mandelwow_program = Rc::new(mandelwow::program(display));
  51         let bounding_box_program = Rc::new(bounding_box::solid_fill_program(display));
  52         let shaded_program = Rc::new(shaded_cube::shaded_program(display));
  53
  54         // These are the bounds for the 3D slice of the 4D Mandelwow
  55         let mandelwow_bounds = Cube {
  56             xmin: -2.0,
  57             xmax: 0.7,
  58             ymin: -1.0,
  59             ymax: 1.0,
  60             zmin: -1.1,
  61             zmax: 1.1,
  62         };
  63
  64         // Generate a wavy sea made of cubes
  65         let sea_xmin = -20.0f32;
  66         let sea_xmax = 20.0f32;
  67         let sea_y = -2.5;
  68         let sea_zmin = -2.0f32;
  69         let sea_zmax = -27.0f32;
  70         let sea_xstep = (sea_xmax - sea_xmin) / (SEA_XSIZE as f32);
  71         let sea_zstep = (sea_zmax - sea_zmin) / (SEA_ZSIZE as f32);
  72         println!("xstep={} ystep={:?}", sea_xstep, sea_zstep);
  73
  74         let mut sea = [[Vector3::zero(); SEA_ZSIZE]; SEA_XSIZE];
  75         for x in 0..SEA_XSIZE {
  76             for z in 0..SEA_ZSIZE {
  77                 sea[x][z] = Vector3 {
  78                     x: sea_xmin + (x as f32) * sea_xstep,
  79                     y: sea_y,
  80                     z: sea_zmin + (z as f32) * sea_zstep,
  81                 };
  82             }
  83         }
  84
  85         World {
  86             mandelwow_program,
  87             mandelwow_bbox: BoundingBox::new(
  88                 display, &mandelwow_bounds, bounding_box_program.clone()),
  89             mandelwow_bounds,
  90             bounding_box_enabled: true,
  91
  92             shaded_cube: ShadedCube::new(display, shaded_program.clone()),
  93             text: text::Text::new(display),
  94             sea,
  95
  96             hit_time: 0.0,
  97             last_hit: 0.0,
  98         }
  99     }
 100
 101     fn draw_frame(
 102         &self,
 103         display: &Display,
 104         camera: &support::camera::CameraState,
 105         t: f32,
 106     ) {
 107         let perspview = camera.get_perspview();
 108
 109         let hit_delta = t - self.hit_time;
 110         let hit_scale = 1. / (1. + hit_delta * hit_delta * 15.0) + 1.;
 111
 112         // Vary the wow factor to slice the Mandelwow along its 4th dimension.
 113         let wmin = -0.8;
 114         let wmax = 0.8;
 115         let wsize = wmax - wmin;
 116         let wow = (((t * 0.7).sin() + 1.0) / 2.0) * wsize + wmin;
 117
 118         //println!("t={} w={:?} camera={:?}", t, w, camera.get_pos());
 119
 120         let mut frame = display.draw();
 121         frame.clear_color_and_depth((0.0, 0.0, 0.0, 1.0), 1.0);
 122
 123         let rotation = Matrix4::from(Euler {
 124             x: Rad(t.sin() / 3.),
 125             y: Rad(t.sin() / 2.),
 126             z: Rad(t / 1.5),
 127         });
 128         let z_trans = -3.0; // Send the model back a little bit so it fits the screen.
 129         let scale = Matrix4::from_diagonal(Vector4::new(hit_scale, hit_scale, hit_scale, 1.0));
 130         let model2 = Matrix4::from_translation(Vector3::unit_z() * z_trans) * rotation * scale;
 131         let model = array4x4(model2);
 132
 133         // Draw the bounding box before the fractal, when the Z-buffer is still clear,
 134         // so the lines behind the semi-translucent areas will be drawn.
 135         if self.bounding_box_enabled {
 136             let uniforms = uniform! {
 137                 model: model,
 138                 view:  camera.get_view(),
 139                 perspective: camera.get_perspective(),
 140             };
 141             self.mandelwow_bbox.draw(&mut frame, &uniforms);
 142         }
 143
 144         let text_rot = Matrix4::from_angle_x(cgmath::Deg(-90.0f32));
 145         let text_pos = Matrix4::from_translation(Vector3 {
 146             x: 0.0,
 147             y: 0.501,
 148             z: 0.0f32,
 149         }) * text_rot;
 150         for x in 0..SEA_XSIZE {
 151             for z in 0..SEA_ZSIZE {
 152                 let wave = ((x as f32 / SEA_XSIZE as f32 * PI * 5.0 + t * 2.0).sin()
 153                     + (z as f32 / SEA_ZSIZE as f32 * PI * 3.0 + t * 3.0).sin())
 154                     * 0.3;
 155                 let model = Matrix4::from_translation(
 156                     self.sea[x][z]
 157                         + Vector3 {
 158                             x: 0.,
 159                             y: wave,
 160                             z: 0.,
 161                         },
 162                 );
 163                 let uniforms = uniform! {
 164                     model: array4x4(model),
 165                     perspview: perspview,
 166                     col: [0., (1. - wave).abs() * 0.5,  wave.abs()],
 167                 };
 168                 self.shaded_cube.draw(&mut frame, &uniforms);
 169                 let model = model * text_pos;
 170                 let c = (x + z * SEA_XSIZE) as u8 as char;
 171                 self.text.draw(&mut frame, c, &model, &perspview);
 172             }
 173         }
 174
 175         mandelwow::draw(
 176             &display,
 177             &mut frame,
 178             &self.mandelwow_program,
 179             model,
 180             &camera,
 181             &self.mandelwow_bounds,
 182             wow,
 183         );
 184
 185         frame.finish().unwrap();
 186     }
 187 }
 188
 189
 190 #[cfg(target_os = "emscripten")]
 191 #[allow(non_camel_case_types)]
 192 type em_callback_func = unsafe extern "C" fn();
 193 #[cfg(target_os = "emscripten")]
 194 extern "C" {
 195     fn emscripten_set_main_loop(func: em_callback_func, fps: c_int, simulate_infinite_loop: c_int);
 196 }
 197
 198 #[cfg(target_os = "emscripten")]
 199 thread_local!(static MAIN_LOOP_CALLBACK: std::cell::RefCell<*mut c_void> =
 200               std::cell::RefCell::new(std::ptr::null_mut()));
 201
 202 #[cfg(target_os = "emscripten")]
 203 pub fn set_main_loop_callback<F>(callback: F)
 204 where
 205     F: FnMut() -> support::Action,
 206 {
 207     MAIN_LOOP_CALLBACK.with(|log| {
 208         *log.borrow_mut() = &callback as *const _ as *mut c_void;
 209     });
 210
 211     unsafe {
 212         emscripten_set_main_loop(wrapper::<F>, 0, 1);
 213     }
 214
 215     unsafe extern "C" fn wrapper<F>()
 216     where
 217         F: FnMut() -> support::Action,
 218     {
 219         MAIN_LOOP_CALLBACK.with(|z| {
 220             let closure = *z.borrow_mut() as *mut F;
 221             (*closure)();
 222         });
 223     }
 224 }
 225
 226 #[cfg(not(target_os = "emscripten"))]
 227 pub fn set_main_loop_callback<F>(callback: F)
 228 where
 229     F: FnMut() -> support::Action,
 230 {
 231     support::start_loop(callback);
 232 }
 233
 234 //extern crate gleam;
 235
 236 /*
 237 extern "C" {
 238     fn emscripten_GetProcAddress(
 239         name: *const ::std::os::raw::c_char,
 240     ) -> *const ::std::os::raw::c_void;
 241 }
 242 */
 243
 244 fn main() {
 245     /*
 246     let gl = gleam::gl::GlesFns::load_with(|addr| {
 247             let addr = std::ffi::CString::new(addr).unwrap();
 248             emscripten_GetProcAddress(addr.into_raw() as *const _) as *const _
 249         });
 250     gl.glGetInternalformativ(0, 0, 0, 0, 0);
 251 */
 252
 253     let mut soundplayer = sound::start();
 254
 255     let event_loop = glutin::event_loop::EventLoop::new();
 256     let window = glutin::window::WindowBuilder::new()
 257         //.with_dimensions(1280, 720)
 258         .with_title("MandelWow");
 259     let context = glutin::ContextBuilder::new()
 260         //.with_gl_profile(glutin::GlProfile::Core)
 261         //.with_gl(glutin::GlRequest::Specific(glutin::Api::WebGl, (2, 0)))
 262         .with_gl(glutin::GlRequest::Specific(
 263             glutin::Api::OpenGlEs,
 264             (3, 0),
 265         ))
 266         //.with_gl(glutin::GlRequest::Specific(glutin::Api::OpenGl, (4, 0)))
 267         //.with_depth_buffer(24)
 268         .with_vsync(true);
 269
 270     let display = glium::Display::new(window, context, &event_loop).unwrap();
 271     gl_info(&display);
 272     let mut world = World::new(&display);
 273
 274     let mut timer = Timer::new();
 275     let mut camera = support::camera::CameraState::new();
 276     let mut fullscreen = true;
 277
 278     event_loop.run(move |event, _, control_flow| {
 279         let t = timer.t;
 280         let new_hit = sound::hit_event(&mut soundplayer);
 281         if new_hit > world.last_hit {
 282             world.hit_time = t;
 283         }
 284         world.last_hit = new_hit;
 285
 286         camera.update();
 287
 288         *control_flow = ControlFlow::WaitUntil(Instant::now() + Duration::from_nanos(16_666_667));
 289         match event {
 290             Event::NewEvents(cause) => {
 291                 match cause {
 292                     event::StartCause::ResumeTimeReached { .. } | event::StartCause::Init => {
 293                         world.draw_frame(&display, &camera, t);
 294                     },
 295                     _ => {}
 296                 }
 297             }
 298             Event::WindowEvent { event, .. } => {
 299                 camera.process_input(&event);
 300                 match event {
 301                     WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
 302                     WindowEvent::KeyboardInput { input, .. } => {
 303                         if input.state == event::ElementState::Pressed {
 304                             if let Some(key) = input.virtual_keycode {
 305                                 match key {
 306                                     VirtualKeyCode::Escape | VirtualKeyCode::Q => {
 307                                         *control_flow = ControlFlow::Exit;
 308                                     }
 309                                     VirtualKeyCode::B => world.bounding_box_enabled ^= true,
 310                                     VirtualKeyCode::P => timer.pause ^= true,
 311                                     VirtualKeyCode::PageUp => timer.t += 0.1,
 312                                     VirtualKeyCode::PageDown => timer.t -= 0.2,
 313                                     VirtualKeyCode::F10 => screenshot(&display),
 314                                     VirtualKeyCode::F11 | VirtualKeyCode::Return => {
 315                                         fullscreen ^= true;
 316                                         let fs = if fullscreen {
 317                                             let monitor_handle = display.gl_window().window()
 318                                                 .available_monitors().next().unwrap();
 319                                             Some(glium::glutin::window::Fullscreen::Borderless(monitor_handle))
 320                                         } else {
 321                                             None
 322                                         };
 323                                         display.gl_window().window().set_fullscreen(fs);
 324                                     }
 325                                     _ => (),
 326                                 }
 327                             }
 328                         }
 329                     }
 330                     _ => (),
 331                 }
 332             },
 333             _ => (),
 334         }
 335
 336         timer.update();
 337     });
 338 }