cyborg/src/main.rs

use cyborg::{pass, Renderer};
use std::sync::Arc;
use winit::{
    event::*,
    event_loop::{ControlFlow, EventLoop},
    window::WindowBuilder,
};

struct SurfaceViewport {
    device: Arc<wgpu::Device>,
    size: winit::dpi::PhysicalSize<u32>,
    surface: wgpu::Surface,
    config: wgpu::SurfaceConfiguration,
}

impl SurfaceViewport {
    fn resize(&mut self, new_size: winit::dpi::PhysicalSize<u32>) {
        if new_size.width > 0 && new_size.height > 0 {
            self.size = new_size;
            self.config.width = new_size.width;
            self.config.height = new_size.height;
            self.surface.configure(&self.device, &self.config);
        }
    }
}

async fn make_window_renderer(window: &winit::window::Window) -> (Renderer, SurfaceViewport) {
    let size = window.inner_size();
    let instance = wgpu::Instance::new(wgpu::Backends::all());
    let surface = unsafe { instance.create_surface(window) };
    let adapter = instance
        .request_adapter(&wgpu::RequestAdapterOptions {
            power_preference: wgpu::PowerPreference::LowPower,
            compatible_surface: Some(&surface),
            force_fallback_adapter: false,
        })
        .await
        .unwrap();
    let (device, queue) = adapter
        .request_device(
            &wgpu::DeviceDescriptor {
                features: wgpu::Features::empty(),
                limits: wgpu::Limits::default(),
                label: None,
            },
            None,
        )
        .await
        .unwrap();
    let config = wgpu::SurfaceConfiguration {
        usage: wgpu::TextureUsages::RENDER_ATTACHMENT,
        format: surface.get_preferred_format(&adapter).unwrap(),
        width: size.width,
        height: size.height,
        present_mode: wgpu::PresentMode::Fifo,
    };
    surface.configure(&device, &config);

    let device = Arc::new(device);
    let renderer = Renderer::new(device.clone(), queue);
    let viewport = SurfaceViewport {
        device,
        size,
        surface,
        config,
    };
    (renderer, viewport)
}

fn main() {
    let event_loop = EventLoop::new();
    let window = WindowBuilder::new().build(&event_loop).unwrap();
    let (mut renderer, mut viewport) = pollster::block_on(make_window_renderer(&window));

    let mut camera = cyborg::camera::Flycam::new(0.002, 10.0, 0.25);
    let mut is_grabbed = false;

    let device = renderer.get_device();
    let layouts = renderer.get_layouts();

    let mesh_pass = pass::mesh::MeshPass::new(device.to_owned(), layouts.to_owned(), viewport.config.format);

    renderer.add_pass(mesh_pass);

    event_loop.run(move |event, _, control_flow| match event {
        Event::RedrawRequested(_) => {
            println!("camera: {:#?}", camera);
            match renderer.render(&camera, &viewport.surface, viewport.config.format) {
                Ok(_) => {}
                Err(wgpu::SurfaceError::Lost) => viewport.resize(viewport.size),
                Err(wgpu::SurfaceError::OutOfMemory) => *control_flow = ControlFlow::Exit,
                Err(e) => eprintln!("error: {:?}", e),
            };
        }
        Event::MainEventsCleared => {
            camera.update();
            window.request_redraw();
        }
        Event::DeviceEvent { ref event, .. } => match event {
            DeviceEvent::MouseMotion { delta } => {
                if is_grabbed {
                    camera.process_mouse(delta.0, delta.1);
                }
            }
            _ => {}
        },
        Event::WindowEvent {
            ref event,
            window_id,
        } if window_id == window.id() => match event {
            WindowEvent::KeyboardInput {
                input:
                    KeyboardInput {
                        virtual_keycode: Some(key),
                        state,
                        ..
                    },
                ..
            } => {
                if *state == ElementState::Pressed && *key == VirtualKeyCode::Escape {
                    if is_grabbed {
                        window.set_cursor_grab(false).unwrap();
                        window.set_cursor_visible(true);
                        is_grabbed = false;
                    }
                } else {
                    camera.process_keyboard(*key, *state);
                }
            }
            WindowEvent::MouseInput {
                button: MouseButton::Left,
                state: ElementState::Pressed,
                ..
            } => {
                if !is_grabbed {
                    window.set_cursor_grab(true).unwrap();
                    window.set_cursor_visible(false);
                    is_grabbed = true;
                }
            }
            WindowEvent::CloseRequested => *control_flow = ControlFlow::Exit,
            WindowEvent::Resized(physical_size) => {
                viewport.resize(*physical_size);
            }
            WindowEvent::ScaleFactorChanged { new_inner_size, .. } => {
                viewport.resize(**new_inner_size);
            }
            _ => {}
        },
        _ => {}
    });
}