390 lines
12 KiB
Rust
390 lines
12 KiB
Rust
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,
|
|
camera_uniform: CameraUniform,
|
|
camera_buffer: wgpu::Buffer,
|
|
camera_bind_group: wgpu::BindGroup,
|
|
render_pipeline: wgpu::RenderPipeline,
|
|
}
|
|
|
|
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();
|
|
|
|
let camera_uniform = CameraUniform::new();
|
|
|
|
let camera_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
|
|
label: Some("Camera Buffer"),
|
|
contents: bytemuck::cast_slice(&[camera_uniform]),
|
|
usage: wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST,
|
|
});
|
|
|
|
let camera_bind_group_layout =
|
|
device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
|
|
entries: &[wgpu::BindGroupLayoutEntry {
|
|
binding: 0,
|
|
visibility: wgpu::ShaderStages::VERTEX,
|
|
ty: wgpu::BindingType::Buffer {
|
|
ty: wgpu::BufferBindingType::Uniform,
|
|
has_dynamic_offset: false,
|
|
min_binding_size: None,
|
|
},
|
|
count: None,
|
|
}],
|
|
label: Some("Camera Bind Group Layout"),
|
|
});
|
|
|
|
let camera_bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
|
|
layout: &camera_bind_group_layout,
|
|
entries: &[wgpu::BindGroupEntry {
|
|
binding: 0,
|
|
resource: camera_buffer.as_entire_binding(),
|
|
}],
|
|
label: Some("Camera Bind Group"),
|
|
});
|
|
|
|
let render_pipeline_layout =
|
|
device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
|
|
label: Some("Render Pipeline Layout"),
|
|
bind_group_layouts: &[&camera_bind_group_layout],
|
|
push_constant_ranges: &[],
|
|
});
|
|
|
|
let shader = device.create_shader_module(&wgpu::ShaderModuleDescriptor {
|
|
label: Some("Shader"),
|
|
source: wgpu::ShaderSource::Wgsl(include_str!("shader.wgsl").into()),
|
|
});
|
|
|
|
let render_pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
|
|
label: Some("Render Pipeline"),
|
|
layout: Some(&render_pipeline_layout),
|
|
vertex: wgpu::VertexState {
|
|
module: &shader,
|
|
entry_point: "vs_main",
|
|
buffers: &[Vertex::desc()],
|
|
},
|
|
fragment: Some(wgpu::FragmentState {
|
|
module: &shader,
|
|
entry_point: "fs_main",
|
|
targets: &[wgpu::ColorTargetState {
|
|
format: config.format,
|
|
blend: Some(wgpu::BlendState::REPLACE),
|
|
write_mask: wgpu::ColorWrites::ALL,
|
|
}],
|
|
}),
|
|
primitive: wgpu::PrimitiveState {
|
|
topology: wgpu::PrimitiveTopology::LineList,
|
|
strip_index_format: None,
|
|
front_face: wgpu::FrontFace::Ccw,
|
|
cull_mode: None,
|
|
polygon_mode: wgpu::PolygonMode::Fill,
|
|
unclipped_depth: false,
|
|
conservative: false,
|
|
},
|
|
depth_stencil: None,
|
|
multisample: wgpu::MultisampleState {
|
|
count: 1,
|
|
mask: !0,
|
|
alpha_to_coverage_enabled: false,
|
|
},
|
|
multiview: None,
|
|
});
|
|
|
|
Self {
|
|
size,
|
|
surface,
|
|
device,
|
|
queue,
|
|
config,
|
|
mesh_pool,
|
|
camera_uniform,
|
|
camera_buffer,
|
|
camera_bind_group,
|
|
render_pipeline,
|
|
}
|
|
}
|
|
|
|
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> {
|
|
let output = self.surface.get_current_texture()?;
|
|
let view = output
|
|
.texture
|
|
.create_view(&wgpu::TextureViewDescriptor::default());
|
|
let mut encoder = self
|
|
.device
|
|
.create_command_encoder(&wgpu::CommandEncoderDescriptor {
|
|
label: Some("Render Encoder"),
|
|
});
|
|
|
|
{
|
|
let mut _render_pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
|
|
label: Some("Render Pass"),
|
|
color_attachments: &[wgpu::RenderPassColorAttachment {
|
|
view: &view,
|
|
resolve_target: None,
|
|
ops: wgpu::Operations {
|
|
load: wgpu::LoadOp::Clear(wgpu::Color {
|
|
r: 0.1,
|
|
g: 0.2,
|
|
b: 0.3,
|
|
a: 1.0,
|
|
}),
|
|
store: true,
|
|
},
|
|
}],
|
|
depth_stencil_attachment: None,
|
|
});
|
|
}
|
|
|
|
self.queue.submit(std::iter::once(encoder.finish()));
|
|
output.present();
|
|
|
|
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],
|
|
}
|
|
|
|
impl CameraUniform {
|
|
pub fn new() -> Self {
|
|
Self {
|
|
vp: glam::Mat4::IDENTITY.to_cols_array_2d(),
|
|
}
|
|
}
|
|
|
|
pub fn update(&mut self, camera: &impl Camera) {
|
|
self.vp = camera.get_vp();
|
|
}
|
|
}
|
|
|
|
#[repr(C)]
|
|
#[derive(Copy, Clone, bytemuck::Pod, bytemuck::Zeroable)]
|
|
struct Vertex {
|
|
position: [f32; 3],
|
|
}
|
|
|
|
impl Vertex {
|
|
pub fn desc<'a>() -> wgpu::VertexBufferLayout<'a> {
|
|
wgpu::VertexBufferLayout {
|
|
array_stride: std::mem::size_of::<Vertex>() as wgpu::BufferAddress,
|
|
step_mode: wgpu::VertexStepMode::Vertex,
|
|
attributes: &[wgpu::VertexAttribute {
|
|
offset: 0,
|
|
shader_location: 0,
|
|
format: wgpu::VertexFormat::Float32x3,
|
|
}],
|
|
}
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
_ => {}
|
|
},
|
|
_ => {}
|
|
});
|
|
}
|