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     let display = glium::Display::new(window, context, &events_loop).unwrap();
  78     gl_info(&display);
  79
  80     let mut text = text::Text::new(&display, 'A');
  81     let mandelwow_program = mandelwow::program(&display);
  82     let bounding_box_program = bounding_box::solid_fill_program(&display);
  83     let shaded_program = shaded_cube::shaded_program(&display);
  84
  85     let mut timer = Timer::new();
  86     let mut camera = support::camera::CameraState::new();
  87     let mut bounding_box_enabled = true;
  88     let mut fullscreen = true;
  89
  90     // These are the bounds of the 3D Mandelwow section which we render in 3-space.
  91     let bounds = Cube {
  92         xmin: -2.0,
  93         xmax:  0.7,
  94         ymin: -1.0,
  95         ymax:  1.0,
  96         zmin: -1.1,
  97         zmax:  1.1,
  98     };
  99     let mandelwow_bbox = bounding_box::BoundingBox::new(&display, &bounds, &bounding_box_program);
 100     let shaded_cube = ShadedCube::new(&display, &shaded_program);
 101
 102     const SEA_XSIZE: usize = 40;
 103     const SEA_ZSIZE: usize = 25;
 104     let sea_xmin = -20.0f32;
 105     let sea_xmax =  20.0f32;
 106     let sea_y = -2.5;
 107     let sea_zmin =  -2.0f32;
 108     let sea_zmax = -27.0f32;
 109     let sea_xstep = (sea_xmax - sea_xmin) / (SEA_XSIZE as f32);
 110     let sea_zstep = (sea_zmax - sea_zmin) / (SEA_ZSIZE as f32);
 111     println!("xstep={} ystep={:?}", sea_xstep, sea_zstep);
 112
 113     let mut sea = [[Vector3::zero(); SEA_ZSIZE]; SEA_XSIZE];
 114     for x in 0..SEA_XSIZE {
 115         for z in 0..SEA_ZSIZE {
 116             sea[x][z] = Vector3 {
 117                 x: sea_xmin + (x as f32) * sea_xstep,
 118                 y: sea_y,
 119                 z: sea_zmin + (z as f32) * sea_zstep,
 120             };
 121         }
 122     }
 123
 124     let mut last_hit = 0.0f32;
 125     let mut hit_time = 0.0f32;
 126     set_main_loop_callback(|| {
 127         let t = timer.t;
 128         let new_hit = sound::hit_event(&mut soundplayer);
 129         if new_hit > last_hit {
 130             hit_time = t;
 131         }
 132         last_hit = new_hit;
 133         let hit_delta = t - hit_time;
 134         let hit_scale = 1. / (1. + hit_delta * hit_delta * 15.0) + 1.;
 135
 136         camera.update();
 137         let perspview = camera.get_perspview();
 138
 139         // Vary the wow factor to slice the Mandelwow along its 4th dimension.
 140         let wmin = -0.8;
 141         let wmax =  0.8;
 142         let wsize = wmax - wmin;
 143         let wow = (((t * 0.7).sin() + 1.0) / 2.0) * wsize + wmin;
 144
 145         //println!("t={} w={:?} camera={:?}", t, w, camera.get_pos());
 146
 147         let mut frame = display.draw();
 148         frame.clear_color_and_depth((0.0, 0.0, 0.0, 1.0), 1.0);
 149
 150         let rotation = Matrix4::from(
 151             Euler { x: Rad(t.sin() / 3.), y: Rad(t.sin() / 2.), z: Rad(t / 1.5)});
 152         let z_trans = -3.0;  // Send the model back a little bit so it fits the screen.
 153         let scale =
 154             Matrix4::from_diagonal(Vector4::new(hit_scale, hit_scale, hit_scale, 1.0));
 155         let model2 =
 156             Matrix4::from_translation(Vector3::unit_z() * z_trans) * rotation * scale;
 157         let model = array4x4(model2);
 158
 159         // Draw the bounding box before the fractal, when the Z-buffer is still clear,
 160         // so the lines behind the semi-translucent areas will be drawn.
 161         if bounding_box_enabled {
 162             let uniforms = uniform! {
 163                 model: model,
 164                 view:  camera.get_view(),
 165                 perspective: camera.get_perspective(),
 166             };
 167             mandelwow_bbox.draw(&mut frame, &uniforms);
 168         }
 169
 170         let text_rot = Matrix4::from_angle_x(cgmath::Deg(-90.0f32));
 171         let text_pos = Matrix4::from_translation(Vector3 { x: 0.0, y: 0.501, z: 0.0f32}) * text_rot;
 172         for x in 0..SEA_XSIZE {
 173             for z in 0..SEA_ZSIZE {
 174                 let wave = ((x as f32 / SEA_XSIZE as f32 * PI * 5.0 + t * 2.0).sin() +
 175                             (z as f32 / SEA_ZSIZE as f32 * PI * 3.0 + t * 3.0).sin()) * 0.3;
 176                 let model = Matrix4::from_translation(
 177                     sea[x][z] + Vector3 {x: 0., y: wave, z: 0.});
 178                 let uniforms = uniform! {
 179                     model: array4x4(model),
 180                     perspview: perspview,
 181                     col: [0., (1. - wave).abs() * 0.5,  wave.abs()],
 182                 };
 183                 shaded_cube.draw(&mut frame, &uniforms);
 184                 text.model = model * text_pos;
 185                 text.character = (x + z * SEA_XSIZE) as u8 as char;
 186                 text.draw(&mut frame, &perspview);
 187             }
 188         }
 189
 190         mandelwow::draw(&display, &mut frame, &mandelwow_program, model, &camera, &bounds, wow);
 191
 192         frame.finish().unwrap();
 193
 194         let mut action = support::Action::Continue;
 195         events_loop.poll_events(|event| {
 196             if let glutin::Event::WindowEvent { event, .. } = event {
 197                 camera.process_input(&event);
 198                 match event {
 199                     glutin::WindowEvent::Closed => {
 200                         action = support::Action::Stop
 201                     },
 202                     KeyboardInput { input, .. } => {
 203                         if input.state == glutin::ElementState::Pressed {
 204                             if let Some(key) = input.virtual_keycode {
 205                                 match key {
 206                                     VirtualKeyCode::Escape | VirtualKeyCode::Q => {
 207                                         action = support::Action::Stop;
 208                                     },
 209                                     _ => (),
 210                                 }
 211                             }
 212                         }
 213                     },
 214 /*
 215                     KeyboardInput { input: glutin::KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::Escape), .. } } |
 216                     KeyboardInput { input: glutin::KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::Q), .. } } => {
 217                         return support::Action::Stop
 218                     },
 219                     KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::B) } => {
 220                         bounding_box_enabled ^= true;
 221                     },
 222                     KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::P) } => {
 223                         timer.pause ^= true;
 224                     },
 225                     KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::PageUp) } => {
 226                         timer.t += 0.01;
 227                     },
 228                     KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::PageDown) } => {
 229                         timer.t -= 0.01;
 230                     },
 231                     KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::F10) } => {
 232                         screenshot(&display);
 233                     },
 234                     KeyboardInput { state: Pressed, virtual_keycode: Some(VirtualKeyCode::F11) } => {
 235                         fullscreen ^= true;
 236                         if fullscreen {
 237                             // Not implemented on Linux
 238                             glutin::WindowBuilder::new()
 239                                 .with_fullscreen(glutin::get_primary_monitor())
 240                                 .with_depth_buffer(24)
 241                                 .rebuild_glium(&display).unwrap();
 242                         } else {
 243                             glutin::WindowBuilder::new()
 244                                 .rebuild_glium(&display).unwrap();
 245                         }
 246                     },
 247 */
 248                     _ => (),
 249                 }
 250             }
 251         });
 252
 253         timer.update();
 254
 255         action
 256     });
 257 }