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+ "naga",
+ "parking_lot",
+ "raw-window-handle",
+ "smallvec",
+ "wasm-bindgen",
+ "wasm-bindgen-futures",
+ "web-sys",
+ "wgpu-core",
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+ "wgpu-types",
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+ "cfg_aliases",
+ "codespan-reporting",
+ "copyless",
+ "fxhash",
+ "log",
+ "naga",
+ "parking_lot",
+ "profiling",
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+ "smallvec",
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+ "foreign-types",
+ "fxhash",
+ "glow",
+ "gpu-alloc",
+ "gpu-descriptor",
+ "inplace_it",
+ "js-sys",
+ "khronos-egl",
+ "libloading",
+ "log",
+ "metal",
+ "naga",
+ "objc",
+ "parking_lot",
+ "profiling",
+ "range-alloc",
+ "raw-window-handle",
+ "renderdoc-sys",
+ "thiserror",
+ "wasm-bindgen",
+ "web-sys",
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+ "winapi",
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+ "core-foundation 0.9.2",
+ "core-graphics 0.22.3",
+ "core-video-sys",
+ "dispatch",
+ "instant",
+ "lazy_static",
+ "libc",
+ "log",
+ "mio",
+ "ndk",
+ "ndk-glue",
+ "ndk-sys",
+ "objc",
+ "parking_lot",
+ "percent-encoding",
+ "raw-window-handle",
+ "smithay-client-toolkit",
+ "wasm-bindgen",
+ "wayland-client",
+ "wayland-protocols",
+ "web-sys",
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+ "x11-dl",
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+ "nom",
+]
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..47d0259
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,12 @@
+[package]
+name = "cyborg"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+bytemuck = { version="1.7", features=["derive"] }
+glam = "0.20"
+pollster = "0.2"
+slab = "0.4"
+wgpu = "0.12"
+winit = "0.26"
diff --git a/src/camera.rs b/src/camera.rs
new file mode 100644
index 0000000..6c6809a
--- /dev/null
+++ b/src/camera.rs
@@ -0,0 +1,159 @@
+use glam::{Mat4, Quat, Vec2, Vec3};
+use std::time::Instant;
+use winit::event::{ElementState, VirtualKeyCode};
+
+pub trait Camera {
+    fn get_vp(&self) -> [[f32; 4]; 4];
+}
+
+pub struct Flycam {
+    // input
+    is_up_pressed: bool,
+    is_down_pressed: bool,
+    is_forward_pressed: bool,
+    is_backward_pressed: bool,
+    is_left_pressed: bool,
+    is_right_pressed: bool,
+    mouse_dx: f32,
+    mouse_dy: f32,
+    // state
+    last_update: Instant,
+    pan: f32,
+    tilt: f32,
+    position: Vec3,
+    // constants
+    speed: f32,
+    turn_speed: f32,
+    aspect: f32,
+    fovy: f32,
+    znear: f32,
+    zfar: f32,
+}
+
+impl Flycam {
+    pub fn new(speed: f32, turn_speed: f32) -> Self {
+        Self {
+            is_up_pressed: false,
+            is_down_pressed: false,
+            is_forward_pressed: false,
+            is_backward_pressed: false,
+            is_left_pressed: false,
+            is_right_pressed: false,
+            mouse_dx: 0.0,
+            mouse_dy: 0.0,
+            last_update: Instant::now(),
+            pan: 0.0,
+            tilt: 0.0,
+            position: Vec3::new(0.0, 0.5, 1.0),
+            speed,
+            turn_speed,
+            aspect: 1.0, // TODO compute from size
+            fovy: std::f32::consts::FRAC_PI_2,
+            znear: 0.1,
+            zfar: 100.0,
+        }
+    }
+}
+
+impl Flycam {
+    pub fn process_keyboard(&mut self, key: VirtualKeyCode, state: ElementState) {
+        let is_pressed = state == ElementState::Pressed;
+        match key {
+            VirtualKeyCode::Space => {
+                self.is_up_pressed = is_pressed;
+            }
+            VirtualKeyCode::LShift => {
+                self.is_down_pressed = is_pressed;
+            }
+            VirtualKeyCode::W | VirtualKeyCode::Up => {
+                self.is_forward_pressed = is_pressed;
+            }
+            VirtualKeyCode::A | VirtualKeyCode::Left => {
+                self.is_left_pressed = is_pressed;
+            }
+            VirtualKeyCode::S | VirtualKeyCode::Down => {
+                self.is_backward_pressed = is_pressed;
+            }
+            VirtualKeyCode::D | VirtualKeyCode::Right => {
+                self.is_right_pressed = is_pressed;
+            }
+            _ => {}
+        }
+    }
+
+    pub fn process_mouse(&mut self, mouse_dx: f64, mouse_dy: f64) {
+        self.mouse_dx += mouse_dx as f32;
+        self.mouse_dy += mouse_dy as f32;
+    }
+
+    pub fn resize(&mut self, width: u32, height: u32) {
+        self.aspect = (width as f32) / (height as f32);
+    }
+
+    pub fn update(&mut self) {
+        let dt = self.last_update.elapsed();
+        self.last_update = Instant::now();
+        let dt = dt.as_micros() as f32 / 1_000_000.0;
+
+        let t = self.turn_speed;
+        self.pan += t * self.mouse_dx;
+        self.tilt += t * self.mouse_dy;
+        self.mouse_dx = 0.0;
+        self.mouse_dy = 0.0;
+
+        let tilt_limit = std::f32::consts::FRAC_PI_2;
+        if self.tilt < -tilt_limit {
+            self.tilt = -tilt_limit;
+        } else if self.tilt > tilt_limit {
+            self.tilt = tilt_limit;
+        }
+
+        let s = dt * self.speed;
+        let axis = Self::key_axis;
+        let truck = s * axis(self.is_backward_pressed, self.is_forward_pressed);
+        let dolly = s * axis(self.is_right_pressed, self.is_left_pressed);
+        let boom = s * axis(self.is_down_pressed, self.is_up_pressed);
+        self.move_position(truck, dolly, boom);
+    }
+
+    fn key_axis(negative: bool, positive: bool) -> f32 {
+        if negative {
+            if positive {
+                0.0
+            } else {
+                -1.0
+            }
+        } else {
+            if positive {
+                1.0
+            } else {
+                0.0
+            }
+        }
+    }
+
+    fn move_position(&mut self, truck: f32, dolly: f32, boom: f32) {
+        // truck direction from straight down
+        let h = Vec2::new(self.pan.sin(), -self.pan.cos());
+        // truck direction from the side
+        let v = Vec2::new(self.tilt.cos(), -self.tilt.sin());
+        // composite to get forward direction
+        let truck_to = Vec3::new(h.x * v.x, v.y, h.y * v.x);
+
+        let dolly_to = Vec3::new(-self.pan.cos(), 0.0, -self.pan.sin());
+
+        self.position += (truck_to * truck) + (dolly_to * dolly);
+        self.position.y += boom;
+    }
+}
+
+impl Camera for Flycam {
+    fn get_vp(&self) -> [[f32; 4]; 4] {
+        let orientation = Quat::from_euler(glam::EulerRot::XYZ, self.tilt, self.pan, 0.0);
+        let rotation = Mat4::from_quat(orientation);
+        let view = rotation * Mat4::from_translation(-self.position);
+        let proj = Mat4::perspective_rh_gl(self.fovy, self.aspect, self.znear, self.zfar);
+        let vp = proj * view;
+        vp.to_cols_array_2d()
+    }
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..e30afef
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,243 @@
+use wgpu::util::DeviceExt;
+
+use winit::{
+    event::*,
+    event_loop::{ControlFlow, EventLoop},
+    window::WindowBuilder,
+};
+
+mod camera;
+
+use camera::*;
+
+struct Renderer {
+    pub device: wgpu::Device,
+    pub mesh_pool: MeshPool,
+    pub size: winit::dpi::PhysicalSize<u32>,
+    surface: wgpu::Surface,
+    queue: wgpu::Queue,
+    config: wgpu::SurfaceConfiguration,
+}
+
+impl Renderer {
+    pub async fn new(window: &winit::window::Window) -> Self {
+        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::HighPerformance,
+                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 mesh_pool = MeshPool::default();
+
+        Self {
+            size,
+            surface,
+            device,
+            queue,
+            config,
+            mesh_pool,
+        }
+    }
+
+    pub 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);
+        }
+    }
+
+    pub fn render(
+        &mut self,
+        camera: &impl Camera,
+        meshes: &MeshCommands,
+    ) -> Result<(), wgpu::SurfaceError> {
+        Ok(())
+    }
+}
+
+struct MeshGroup {
+    vertices: wgpu::Buffer,
+    vertex_capacity: usize,
+    indices: wgpu::Buffer,
+    index_capacity: usize,
+}
+
+impl MeshGroup {
+    pub fn new(device: &wgpu::Device, data: &MeshData) -> Self {
+        let vertex_capacity = data.vertices.len();
+        let vertices = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
+            label: Some("Vertex Buffer"),
+            contents: bytemuck::cast_slice(&data.vertices),
+            usage: wgpu::BufferUsages::VERTEX,
+        });
+
+        let index_capacity = data.indices.len();
+        let indices = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
+            label: Some("Index Buffer"),
+            contents: bytemuck::cast_slice(&data.indices),
+            usage: wgpu::BufferUsages::VERTEX,
+        });
+
+        Self {
+            vertex_capacity,
+            vertices,
+            index_capacity,
+            indices,
+        }
+    }
+}
+
+#[derive(Default)]
+struct MeshPool {
+    groups: slab::Slab<MeshGroup>,
+}
+
+impl MeshPool {
+    pub fn allocate(&mut self, device: &wgpu::Device, data: &MeshData) -> MeshHandle {
+        let group = MeshGroup::new(device, data);
+        let group_id = self.groups.insert(group);
+        let sub_id = 0;
+        MeshHandle { group_id, sub_id }
+    }
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
+struct CameraUniform {
+    vp: [[f32; 4]; 4],
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
+struct Vertex {
+    position: [f32; 3],
+}
+
+type Index = u32;
+
+struct MeshData {
+    vertices: Vec<Vertex>,
+    indices: Vec<Index>,
+}
+
+#[repr(C)]
+#[derive(Copy, Clone, Eq, Hash, PartialEq)]
+struct MeshHandle {
+    group_id: usize,
+    // unused for now, since each group contains only one mesh
+    sub_id: usize,
+}
+
+#[derive(Copy, Clone, PartialEq)]
+struct MeshInstance {
+    pub handle: MeshHandle,
+    pub transform: glam::Mat4,
+}
+
+type MeshCommands = Vec<MeshInstance>;
+
+fn main() {
+    let event_loop = EventLoop::new();
+    let window = WindowBuilder::new().build(&event_loop).unwrap();
+    let mut camera = Flycam::new(10.0, 0.002);
+    let mut is_grabbed = false;
+    let mut ren = pollster::block_on(Renderer::new(&window));
+    let commands = MeshCommands::new();
+
+    event_loop.run(move |event, _, control_flow| match event {
+        Event::RedrawRequested(_) => match ren.render(&camera, &commands) {
+            Ok(_) => {}
+            Err(wgpu::SurfaceError::Lost) => ren.resize(ren.size),
+            Err(wgpu::SurfaceError::OutOfMemory) => *control_flow = ControlFlow::Exit,
+            Err(e) => println!("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) => {
+                ren.resize(*physical_size);
+                camera.resize(physical_size.width, physical_size.height);
+            }
+            WindowEvent::ScaleFactorChanged { new_inner_size, .. } => {
+                ren.resize(**new_inner_size);
+                camera.resize(new_inner_size.width, new_inner_size.height);
+            }
+            _ => {}
+        },
+        _ => {}
+    });
+}