main.rs

   1 extern crate mandelwow_lib;
   2
   3 extern crate cgmath;
   4 #[macro_use(uniform)]
   5 extern crate glium;
   6 extern crate glutin;
   7
   8 use cgmath::{Euler, Matrix4, Rad, SquareMatrix, Vector3, Vector4, Zero};
   9 use cgmath::conv::array4x4;
  10 use glium::{Surface};
  11 use glutin::ElementState::Pressed;
  12 use glutin::WindowEvent::KeyboardInput;
  13 use glutin::VirtualKeyCode;
  14 use mandelwow_lib::*;
  15 use std::f32::consts::PI;
  16 use timer::Timer;
  17
  18 #[cfg(target_os = "emscripten")]
  19 use std::os::raw::{c_int, c_void};
  20
  21 fn gl_info(display : &glium::Display) {
  22     if cfg!(feature = "logging") {
  23         let version = *display.get_opengl_version();
  24         let api = match version {
  25             glium::Version(glium::Api::Gl, _, _) => "OpenGL",
  26             glium::Version(glium::Api::GlEs, _, _) => "OpenGL ES"
  27         };
  28         println!("{} context verson: {}", api, display.get_opengl_version_string());
  29     }
  30 }
  31
  32 #[cfg(target_os = "emscripten")]
  33 #[allow(non_camel_case_types)]
  34 type em_callback_func = unsafe extern fn();
  35 #[cfg(target_os = "emscripten")]
  36 extern {
  37     fn emscripten_set_main_loop(func : em_callback_func, fps : c_int, simulate_infinite_loop : c_int);
  38 }
  39
  40 #[cfg(target_os = "emscripten")]
  41 thread_local!(static MAIN_LOOP_CALLBACK: std::cell::RefCell<*mut c_void> =
  42               std::cell::RefCell::new(std::ptr::null_mut()));
  43
  44 #[cfg(target_os = "emscripten")]
  45 pub fn set_main_loop_callback<F>(callback : F) where F : FnMut() -> support::Action {
  46     MAIN_LOOP_CALLBACK.with(|log| {
  47             *log.borrow_mut() = &callback as *const _ as *mut c_void;
  48             });
  49
  50     unsafe { emscripten_set_main_loop(wrapper::<F>, 0, 1); }
  51
  52     unsafe extern "C" fn wrapper<F>() where F : FnMut() -> support::Action {
  53         MAIN_LOOP_CALLBACK.with(|z| {
  54             let closure = *z.borrow_mut() as *mut F;
  55             (*closure)();
  56         });
  57     }
  58 }
  59
  60 #[cfg(not(target_os = "emscripten"))]
  61 pub fn set_main_loop_callback<F>(callback : F) where F : FnMut() -> support::Action {
  62     support::start_loop(callback);
  63 }
  64
  65 fn main() {
  66     let mut soundplayer = sound::start();
  67
  68     let mut events_loop = glutin::EventsLoop::new();
  69     let window = glutin::WindowBuilder::new()
  70         .with_dimensions(1280, 720)
  71         //.with_fullscreen(glutin::get_primary_monitor())
  72         .with_title("MandelWow");
  73     let context = glutin::ContextBuilder::new()
  74         .with_gl_profile(glutin::GlProfile::Core)
  75         .with_depth_buffer(24)
  76         .with_vsync(true)
  77         .with_srgb(true);
  78     let display = glium::Display::new(window, context, &events_loop).unwrap();
  79     gl_info(&display);
  80
  81     let mut text = text::Text::new(&display, 'A');
  82     let mandelwow_program = mandelwow::program(&display);
  83     let bounding_box_program = bounding_box::solid_fill_program(&display);
  84     let shaded_program = shaded_cube::shaded_program(&display);
  85
  86     let mut timer = Timer::new();
  87     let mut camera = support::camera::CameraState::new();
  88     let mut bounding_box_enabled = true;
  89     let mut fullscreen = true;
  90
  91     // These are the bounds of the 3D Mandelwow section which we render in 3-space.
  92     let bounds = Cube {
  93         xmin: -2.0,
  94         xmax:  0.7,
  95         ymin: -1.0,
  96         ymax:  1.0,
  97         zmin: -1.1,
  98         zmax:  1.1,
  99     };
 100     let mandelwow_bbox = bounding_box::BoundingBox::new(&display, &bounds, &bounding_box_program);
 101     let shaded_cube = ShadedCube::new(&display, &shaded_program);
 102
 103     const SEA_XSIZE: usize = 40;
 104     const SEA_ZSIZE: usize = 25;
 105     let sea_xmin = -20.0f32;
 106     let sea_xmax =  20.0f32;
 107     let sea_y = -2.5;
 108     let sea_zmin =  -2.0f32;
 109     let sea_zmax = -27.0f32;
 110     let sea_xstep = (sea_xmax - sea_xmin) / (SEA_XSIZE as f32);
 111     let sea_zstep = (sea_zmax - sea_zmin) / (SEA_ZSIZE as f32);
 112     println!("xstep={} ystep={:?}", sea_xstep, sea_zstep);
 113
 114     let mut sea = [[Vector3::zero(); SEA_ZSIZE]; SEA_XSIZE];
 115     for x in 0..SEA_XSIZE {
 116         for z in 0..SEA_ZSIZE {
 117             sea[x][z] = Vector3 {
 118                 x: sea_xmin + (x as f32) * sea_xstep,
 119                 y: sea_y,
 120                 z: sea_zmin + (z as f32) * sea_zstep,
 121             };
 122         }
 123     }
 124
 125     let mut last_hit = 0.0f32;
 126     let mut hit_time = 0.0f32;
 127     set_main_loop_callback(|| {
 128         let t = timer.t;
 129         let new_hit = sound::hit_event(&mut soundplayer);
 130         if new_hit > last_hit {
 131             hit_time = t;
 132         }
 133         last_hit = new_hit;
 134         let hit_delta = t - hit_time;
 135         let hit_scale = 1. / (1. + hit_delta * hit_delta * 15.0) + 1.;
 136
 137         camera.update();
 138         let perspview = camera.get_perspview();
 139
 140         // Vary the wow factor to slice the Mandelwow along its 4th dimension.
 141         let wmin = -0.8;
 142         let wmax =  0.8;
 143         let wsize = wmax - wmin;
 144         let wow = (((t * 0.7).sin() + 1.0) / 2.0) * wsize + wmin;
 145
 146         //println!("t={} w={:?} camera={:?}", t, w, camera.get_pos());
 147
 148         let mut frame = display.draw();
 149         frame.clear_color_and_depth((0.0, 0.0, 0.0, 1.0), 1.0);
 150
 151         let rotation = Matrix4::from(
 152             Euler { x: Rad(t.sin() / 3.), y: Rad(t.sin() / 2.), z: Rad(t / 1.5)});
 153         let z_trans = -3.0;  // Send the model back a little bit so it fits the screen.
 154         let scale =
 155             Matrix4::from_diagonal(Vector4::new(hit_scale, hit_scale, hit_scale, 1.0));
 156         let model2 =
 157             Matrix4::from_translation(Vector3::unit_z() * z_trans) * rotation * scale;
 158         let model = array4x4(model2);
 159
 160         // Draw the bounding box before the fractal, when the Z-buffer is still clear,
 161         // so the lines behind the semi-translucent areas will be drawn.
 162         if bounding_box_enabled {
 163             let uniforms = uniform! {
 164                 model: model,
 165                 view:  camera.get_view(),
 166                 perspective: camera.get_perspective(),
 167             };
 168             mandelwow_bbox.draw(&mut frame, &uniforms);
 169         }
 170
 171         let text_rot = Matrix4::from_angle_x(cgmath::Deg(-90.0f32));
 172         let text_pos = Matrix4::from_translation(Vector3 { x: 0.0, y: 0.501, z: 0.0f32}) * text_rot;
 173         for x in 0..SEA_XSIZE {
 174             for z in 0..SEA_ZSIZE {
 175                 let wave = ((x as f32 / SEA_XSIZE as f32 * PI * 5.0 + t * 2.0).sin() +
 176                             (z as f32 / SEA_ZSIZE as f32 * PI * 3.0 + t * 3.0).sin()) * 0.3;
 177                 let model = Matrix4::from_translation(
 178                     sea[x][z] + Vector3 {x: 0., y: wave, z: 0.});
 179                 let uniforms = uniform! {
 180                     model: array4x4(model),
 181                     perspview: perspview,
 182                     col: [0., (1. - wave).abs() * 0.5,  wave.abs()],
 183                 };
 184                 shaded_cube.draw(&mut frame, &uniforms);
 185                 text.model = model * text_pos;
 186                 text.character = (x + z * SEA_XSIZE) as u8 as char;
 187                 text.draw(&mut frame, &perspview);
 188             }
 189         }
 190
 191         mandelwow::draw(&display, &mut frame, &mandelwow_program, model, &camera, &bounds, wow);
 192
 193         frame.finish().unwrap();
 194
 195         let mut action = support::Action::Continue;
 196         events_loop.poll_events(|event| {
 197             if let glutin::Event::WindowEvent { event, .. } = event {
 198                 camera.process_input(&event);
 199                 match event {
 200                     glutin::WindowEvent::Closed => {
 201                         action = support::Action::Stop
 202                     },
 203                     KeyboardInput { input, .. } => {
 204                         if input.state == glutin::ElementState::Pressed {
 205                             if let Some(key) = input.virtual_keycode {
 206                                 match key {
 207                                     VirtualKeyCode::Escape | VirtualKeyCode::Q => {
 208                                         action = support::Action::Stop;
 209                                     },
 210                                     _ => (),
 211                                 }
 212                             }
 213                         }
 214                     },
 215 /*
 216                     KeyboardInput { input: glutin::KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::Escape), .. } } |
 217                     KeyboardInput { input: glutin::KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::Q), .. } } => {
 218                         return support::Action::Stop
 219                     },
 220                     KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::B) } => {
 221                         bounding_box_enabled ^= true;
 222                     },
 223                     KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::P) } => {
 224                         timer.pause ^= true;
 225                     },
 226                     KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::PageUp) } => {
 227                         timer.t += 0.01;
 228                     },
 229                     KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::PageDown) } => {
 230                         timer.t -= 0.01;
 231                     },
 232                     KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::F10) } => {
 233                         screenshot(&display);
 234                     },
 235                     KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::F11) } => {
 236                         fullscreen ^= true;
 237                         if fullscreen {
 238                             // Not implemented on Linux
 239                             glutin::WindowBuilder::new()
 240                                 .with_fullscreen(glutin::get_primary_monitor())
 241                                 .with_depth_buffer(24)
 242                                 .rebuild_glium(&display).unwrap();
 243                         } else {
 244                             glutin::WindowBuilder::new()
 245                                 .rebuild_glium(&display).unwrap();
 246                         }
 247                     },
 248 */
 249                     _ => (),
 250                 }
 251             }
 252         });
 253
 254         timer.update();
 255
 256         action
 257     });
 258 }