Add Planets demo
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0c75860efd
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5b318134c5
116
src/main.rs
116
src/main.rs
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@ -376,29 +376,114 @@ fn load_model() -> MeshData {
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MeshData { vertices, indices }
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}
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trait WorldState {
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fn update(&mut self);
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fn render(&self) -> Vec<MeshInstance>;
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}
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struct Grid {
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meshes: Vec<MeshInstance>,
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}
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impl Grid {
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fn new(ren: &mut Renderer) -> Self {
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let mesh_data = load_model();
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let mesh = ren.mesh_pool.allocate(&ren.device, &mesh_data);
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let mut meshes = Vec::new();
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for x in -5..5 {
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for y in -5..5 {
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let translation = glam::Vec3::new(x as f32, 0.0, y as f32) * 3.0;
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let transform = glam::Mat4::from_translation(translation);
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meshes.push(MeshInstance {
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handle: mesh,
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transform,
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});
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}
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}
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Self { meshes }
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}
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}
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impl WorldState for Grid {
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fn update(&mut self) {}
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fn render(&self) -> Vec<MeshInstance> {
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self.meshes.clone()
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}
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}
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struct Planet {
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speed: f32,
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offset: f32,
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radius: f32,
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size: f32,
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}
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struct Planets {
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start: std::time::Instant,
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planets: Vec<Planet>,
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mesh: MeshHandle,
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}
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impl Planets {
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fn new(ren: &mut Renderer) -> Self {
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let start = std::time::Instant::now();
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let mesh_data = load_model();
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let mesh = ren.mesh_pool.allocate(&ren.device, &mesh_data);
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let mut planets = Vec::new();
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for i in 0..10 {
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let i = i as f32;
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planets.push(Planet {
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speed: 1.618 * 1.5 / i,
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offset: 0.0,
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radius: i * 2.0,
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size: 0.5,
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});
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}
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Self {
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start,
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planets,
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mesh,
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}
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}
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}
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impl WorldState for Planets {
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fn update(&mut self) {}
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fn render(&self) -> Vec<MeshInstance> {
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let elapsed = self.start.elapsed().as_secs_f32();
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let mut meshes = Vec::new();
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for planet in self.planets.iter() {
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let translation = glam::Vec3::new(0.0, 0.0, planet.radius);
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let translation = glam::Mat4::from_translation(translation);
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let theta = planet.speed * elapsed + planet.offset;
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let rotation = glam::Mat4::from_rotation_y(theta);
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meshes.push(MeshInstance {
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handle: self.mesh,
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transform: rotation * translation,
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});
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}
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meshes
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}
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}
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fn main() {
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let mesh_data = load_model();
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let event_loop = EventLoop::new();
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let window = WindowBuilder::new().build(&event_loop).unwrap();
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let mut camera = Flycam::new(10.0, 0.002);
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let mut is_grabbed = false;
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let mut ren = pollster::block_on(Renderer::new(&window));
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let mesh = ren.mesh_pool.allocate(&ren.device, &mesh_data);
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let mut commands = Vec::new();
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for x in -5..5 {
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for y in -5..5 {
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let translation = glam::Vec3::new(x as f32, 0.0, y as f32) * 3.0;
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let transform = glam::Mat4::from_translation(translation);
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commands.push(MeshInstance {
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handle: mesh,
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transform,
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});
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}
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}
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let mut state: Box<dyn WorldState> = Box::new(Planets::new(&mut ren));
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// let mut state: Box<dyn WorldState> = Box::new(Grid::new(&mut ren));
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event_loop.run(move |event, _, control_flow| match event {
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Event::RedrawRequested(_) => match ren.render(&camera, &commands) {
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Event::RedrawRequested(_) => match ren.render(&camera, &state.render()) {
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Ok(_) => {}
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Err(wgpu::SurfaceError::Lost) => ren.resize(ren.size),
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Err(wgpu::SurfaceError::OutOfMemory) => *control_flow = ControlFlow::Exit,
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@ -406,6 +491,7 @@ fn main() {
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},
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Event::MainEventsCleared => {
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camera.update();
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state.update();
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window.request_redraw();
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}
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Event::DeviceEvent { ref event, .. } => match event {
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