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minimum-viable-game-engine
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ripping up the example

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master
mitchellhansen 4 years ago
parent 7fc761ef9c
commit 77dcf1faf9
26 changed files with 4974 additions and 1072 deletions
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1
Cargo.toml
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ddsfile = "0.4"
wgpu-subscriber = "0.1.0"
tobj = "2.0.3"

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layout(location = 0) in vec4 a_Pos;
layout(set = 0, binding = 0) uniform Globals {
mat4 u_ViewProj;

BIN
resources/bake.vert.spv
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resources/cube.obj
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o cube
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v 0.500000 0.500000 -0.500000
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vt 0.000000 0.000000
vt 1.000000 0.000000
vt 0.000000 1.000000
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vn 1.000000 0.000000 0.000000
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g cube
usemtl cube
s 1
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s 2
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f 5/3/2 4/2/2 6/4/2
s 3
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resources/forward.frag.spv
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resources/forward.vert
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#version 450
layout(location = 0) in ivec4 a_Pos;
layout(location = 1) in ivec4 a_Normal;
layout(location = 0) in vec4 a_Pos;
layout(location = 1) in vec4 a_Normal;
layout(location = 0) out vec3 v_Normal;
layout(location = 1) out vec4 v_Position;

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resources/forward.vert.spv
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resources/monkey.mtl
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# Blender MTL File: 'None'
# Material Count: 1
newmtl None
Ns 0
Ka 0.000000 0.000000 0.000000
Kd 0.8 0.8 0.8
Ks 0.8 0.8 0.8
d 1
illum 2

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resources/monkey.obj
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resources/my_tree.mtl
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# Blender MTL File: 'None'
# Material Count: 1
newmtl None
Ns 0
Ka 0.000000 0.000000 0.000000
Kd 0.8 0.8 0.8
Ks 0.8 0.8 0.8
d 1
illum 2

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resources/my_tree.obj
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# Blender v2.79 (sub 0) OBJ File: ''
# www.blender.org
mtllib my_tree.mtl
o Cylinder
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vn 0.0000 1.0000 0.0000
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vn -0.0980 0.0000 -0.9952
vn 0.0000 -1.0000 0.0000
usemtl None
s off
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f 31//34 33//34 35//34
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o Cone
v 0.054508 2.540176 -0.904596
v 0.226944 2.540176 -0.887612
v 0.392753 2.540176 -0.837315
v 0.545563 2.540176 -0.755636
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usemtl None
s off
f 65//35 88//35 66//35
f 66//36 88//36 67//36
f 67//37 88//37 68//37
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o Cone.001
v 0.054508 1.691299 -1.020720
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usemtl None
s off
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o Cone.002
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v 1.323567 0.587866 -0.273151
v 1.348430 0.587866 -0.020720
v 1.323567 0.587866 0.231712
v 1.249936 0.587866 0.474443
v 1.130365 0.587866 0.698145
v 0.969449 0.587866 0.894221
v 0.773372 0.587866 1.055137
v 0.549670 0.587866 1.174708
v 0.306939 0.587866 1.248340
v 0.054508 0.587866 1.273202
v -0.197924 0.587866 1.248340
v -0.440655 0.587866 1.174708
v -0.664357 0.587866 1.055136
v -0.860433 0.587866 0.894221
v -1.021349 0.587866 0.698144
v -1.140920 0.587866 0.474442
v 0.054508 3.175709 -0.020720
v -1.214551 0.587866 0.231711
v -1.239413 0.587866 -0.020721
v -1.214551 0.587866 -0.273152
v -1.140919 0.587866 -0.515883
v -1.021347 0.587866 -0.739585
v -0.860431 0.587866 -0.935661
v -0.664355 0.587866 -1.096577
v -0.440652 0.587866 -1.216148
v -0.197921 0.587866 -1.289779
vn 0.0878 0.4455 -0.8910
vn 0.2599 0.4455 -0.8567
vn 0.4220 0.4455 -0.7896
vn 0.5680 0.4455 -0.6921
vn 0.6921 0.4455 -0.5680
vn 0.7896 0.4455 -0.4220
vn 0.8567 0.4455 -0.2599
vn 0.8910 0.4455 -0.0878
vn 0.8910 0.4455 0.0878
vn 0.8567 0.4455 0.2599
vn 0.7896 0.4455 0.4220
vn 0.6921 0.4455 0.5680
vn 0.5680 0.4455 0.6921
vn 0.4220 0.4455 0.7896
vn 0.2599 0.4455 0.8567
vn 0.0878 0.4455 0.8910
vn -0.0878 0.4455 0.8910
vn -0.2599 0.4455 0.8567
vn -0.4220 0.4455 0.7896
vn -0.5680 0.4455 0.6921
vn -0.6921 0.4455 0.5680
vn -0.7896 0.4455 0.4220
vn -0.8567 0.4455 0.2599
vn -0.8910 0.4455 0.0878
vn -0.8910 0.4455 -0.0878
vn -0.8567 0.4455 -0.2599
vn -0.7896 0.4455 -0.4220
vn -0.6921 0.4455 -0.5680
vn -0.5680 0.4455 -0.6921
vn -0.4220 0.4455 -0.7896
vn -0.2599 0.4455 -0.8567
vn -0.0878 0.4455 -0.8910
vn 0.0000 -1.0000 0.0000
usemtl None
s off
f 131//101 154//101 132//101
f 132//102 154//102 133//102
f 133//103 154//103 134//103
f 134//104 154//104 135//104
f 135//105 154//105 136//105
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f 159//128 154//128 160//128
f 160//129 154//129 161//129
f 161//130 154//130 162//130
f 162//131 154//131 163//131
f 163//132 154//132 131//132
f 138//133 146//133 155//133
f 163//133 131//133 132//133
f 132//133 133//133 134//133
f 134//133 135//133 136//133
f 136//133 137//133 134//133
f 137//133 138//133 134//133
f 138//133 139//133 140//133
f 140//133 141//133 138//133
f 141//133 142//133 138//133
f 142//133 143//133 146//133
f 143//133 144//133 146//133
f 144//133 145//133 146//133
f 146//133 147//133 148//133
f 148//133 149//133 150//133
f 150//133 151//133 152//133
f 152//133 153//133 155//133
f 155//133 156//133 157//133
f 157//133 158//133 159//133
f 159//133 160//133 163//133
f 160//133 161//133 163//133
f 161//133 162//133 163//133
f 163//133 132//133 134//133
f 146//133 148//133 155//133
f 148//133 150//133 155//133
f 150//133 152//133 155//133
f 155//133 157//133 163//133
f 157//133 159//133 163//133
f 163//133 134//133 138//133
f 138//133 142//133 146//133
f 163//133 138//133 155//133

275
src/framework.rs
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@ -1,36 +1,7 @@
use futures::task::LocalSpawn;
#[cfg(not(target_arch = "wasm32"))]
use std::time::{Duration, Instant};
use winit::{
event::{self, WindowEvent},
event_loop::{ControlFlow, EventLoop},
};
use wgpu_subscriber;
#[cfg_attr(rustfmt, rustfmt_skip)]
#[allow(unused)]
pub const OPENGL_TO_WGPU_MATRIX: cgmath::Matrix4<f32> = cgmath::Matrix4::new(
1.0, 0.0, 0.0, 0.0,
0.0, 1.0, 0.0, 0.0,
0.0, 0.0, 0.5, 0.0,
0.0, 0.0, 0.5, 1.0,
);
#[allow(dead_code)]
pub fn cast_slice<T>(data: &[T]) -> &[u8] {
use std::{mem::size_of, slice::from_raw_parts};
unsafe { from_raw_parts(data.as_ptr() as *const u8, data.len() * size_of::<T>()) }
}
#[allow(dead_code)]
pub enum ShaderStage {
Vertex,
Fragment,
Compute,
}
pub trait Example: 'static + Sized {
/*
pub trait Runtime: 'static + Sized {
fn optional_features() -> wgpu::Features {
wgpu::Features::empty()
}
@ -60,253 +31,21 @@ pub trait Example: 'static + Sized {
spawner: &impl LocalSpawn,
);
}
*/
struct Setup {
window: winit::window::Window,
event_loop: EventLoop<()>,
instance: wgpu::Instance,
size: winit::dpi::PhysicalSize<u32>,
surface: wgpu::Surface,
adapter: wgpu::Adapter,
device: wgpu::Device,
queue: wgpu::Queue,
}
async fn setup<E: Example>(title: &str) -> Setup {
#[cfg(not(target_arch = "wasm32"))]
{
let chrome_tracing_dir = std::env::var("WGPU_CHROME_TRACE");
wgpu_subscriber::initialize_default_subscriber(
chrome_tracing_dir.as_ref().map(std::path::Path::new).ok(),
);
};
#[cfg(target_arch = "wasm32")]
console_log::init().expect("could not initialize logger");
let event_loop = EventLoop::new();
let mut builder = winit::window::WindowBuilder::new();
builder = builder.with_title(title);
#[cfg(windows_OFF)] // TODO
{
use winit::platform::windows::WindowBuilderExtWindows;
builder = builder.with_no_redirection_bitmap(true);
}
let window = builder.build(&event_loop).unwrap();
log::info!("Initializing the surface...");
let instance = wgpu::Instance::new(wgpu::BackendBit::PRIMARY);
let (size, surface) = unsafe {
let size = window.inner_size();
let surface = instance.create_surface(&window);
(size, surface)
};
let adapter = instance
.request_adapter(&wgpu::RequestAdapterOptions {
power_preference: wgpu::PowerPreference::HighPerformance,
compatible_surface: Some(&surface),
})
.await
.unwrap();
let optional_features = E::optional_features();
let required_features = E::required_features();
let adapter_features = adapter.features();
assert!(
adapter_features.contains(required_features),
"Adapter does not support required features for this example: {:?}",
required_features - adapter_features
);
let needed_limits = E::required_limits();
let trace_dir = std::env::var("WGPU_TRACE");
let (device, queue) = adapter
.request_device(
&wgpu::DeviceDescriptor {
features: (optional_features & adapter_features) | required_features,
limits: needed_limits,
shader_validation: true,
},
trace_dir.ok().as_ref().map(std::path::Path::new),
)
.await
.unwrap();
Setup {
window,
event_loop,
instance,
size,
surface,
adapter,
device,
queue,
}
}
fn start<E: Example>(
Setup {
window,
event_loop,
instance,
size,
surface,
adapter,
device,
queue,
}: Setup,
) {
/*
#[cfg(not(target_arch = "wasm32"))]
let (mut pool, spawner) = {
let local_pool = futures::executor::LocalPool::new();
let spawner = local_pool.spawner();
(local_pool, spawner)
};
#[cfg(target_arch = "wasm32")]
let spawner = {
use futures::{future::LocalFutureObj, task::SpawnError};
use winit::platform::web::WindowExtWebSys;
struct WebSpawner {}
impl LocalSpawn for WebSpawner {
fn spawn_local_obj(
&self,
future: LocalFutureObj<'static, ()>,
) -> Result<(), SpawnError> {
Ok(wasm_bindgen_futures::spawn_local(future))
}
}
std::panic::set_hook(Box::new(console_error_panic_hook::hook));
// On wasm, append the canvas to the document body
web_sys::window()
.and_then(|win| win.document())
.and_then(|doc| doc.body())
.and_then(|body| {
body.append_child(&web_sys::Element::from(window.canvas()))
.ok()
})
.expect("couldn't append canvas to document body");
WebSpawner {}
};
let mut sc_desc = wgpu::SwapChainDescriptor {
usage: wgpu::TextureUsage::OUTPUT_ATTACHMENT,
// TODO: Allow srgb unconditionally
format: if cfg!(target_arch = "wasm32") {
wgpu::TextureFormat::Bgra8Unorm
} else {
wgpu::TextureFormat::Bgra8UnormSrgb
},
width: size.width,
height: size.height,
present_mode: wgpu::PresentMode::Mailbox,
};
let mut swap_chain = device.create_swap_chain(&surface, &sc_desc);
log::info!("Initializing the example...");
let mut example = E::init(&sc_desc, &device, &queue);
#[cfg(not(target_arch = "wasm32"))]
let mut last_update_inst = Instant::now();
log::info!("Entering render loop...");
event_loop.run(move |event, _, control_flow| {
let _ = (&instance, &adapter); // force ownership by the closure
*control_flow = if cfg!(feature = "metal-auto-capture") {
ControlFlow::Exit
} else {
#[cfg(not(target_arch = "wasm32"))]
{
ControlFlow::WaitUntil(Instant::now() + Duration::from_millis(10))
}
#[cfg(target_arch = "wasm32")]
{
ControlFlow::Poll
}
};
match event {
event::Event::MainEventsCleared => {
#[cfg(not(target_arch = "wasm32"))]
{
if last_update_inst.elapsed() > Duration::from_millis(20) {
window.request_redraw();
last_update_inst = Instant::now();
}
pool.run_until_stalled();
}
#[cfg(target_arch = "wasm32")]
window.request_redraw();
}
event::Event::WindowEvent {
event: WindowEvent::Resized(size),
..
} => {
log::info!("Resizing to {:?}", size);
sc_desc.width = size.width;
sc_desc.height = size.height;
example.resize(&sc_desc, &device, &queue);
swap_chain = device.create_swap_chain(&surface, &sc_desc);
}
event::Event::WindowEvent { event, .. } => match event {
WindowEvent::KeyboardInput {
input:
event::KeyboardInput {
virtual_keycode: Some(event::VirtualKeyCode::Escape),
state: event::ElementState::Pressed,
..
},
..
}
| WindowEvent::CloseRequested => {
*control_flow = ControlFlow::Exit;
}
_ => {
example.update(event);
}
},
event::Event::RedrawRequested(_) => {
let frame = match swap_chain.get_current_frame() {
Ok(frame) => frame,
Err(_) => {
swap_chain = device.create_swap_chain(&surface, &sc_desc);
swap_chain
.get_current_frame()
.expect("Failed to acquire next swap chain texture!")
}
};
example.render(&frame.output, &device, &queue, &spawner);
}
_ => {}
}
});
}
#[cfg(not(target_arch = "wasm32"))]
pub fn run<E: Example>(title: &str) {
pub fn run<E: Runtime>(title: &str) {
let setup = futures::executor::block_on(setup::<E>(title));
start::<E>(setup);
}
#[cfg(target_arch = "wasm32")]
pub fn run<E: Example>(title: &str) {
pub fn run<E: Runtime>(title: &str) {
let title = title.to_owned();
wasm_bindgen_futures::spawn_local(async move {
let setup = setup::<E>(&title).await;
start::<E>(setup);
});
}
// This allows treating the framework as a standalone example,
// thus avoiding listing the example names in `Cargo.toml`.
#[allow(dead_code)]
fn main() {}
*/

87
src/geometry.rs
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@ -0,0 +1,87 @@
use bytemuck::{Pod, Zeroable};
#[repr(C)]
#[derive(Clone, Copy, Debug)]
struct Vertex {
_pos: [f32; 4],
_normal: [f32; 4],
}
unsafe impl Pod for Vertex {}
unsafe impl Zeroable for Vertex {}
fn vertex(pos: [f32; 3], nor: [f32; 3]) -> Vertex {
Vertex {
_pos: [pos[0], pos[1], pos[2], 1.0],
_normal: [nor[0], nor[1], nor[2], 0.0],
}
}
fn import_mesh(mesh_path: &str) -> (Vec<Vertex>, Vec<u32>) {
//let obj_file = "/home/mrh/source/3d-min-viable-eng/resources/Tree_01.obj";
//let mtl_file = "/home/mrh/source/3d-min-viable-eng/resources/Tree_01.mtl";
let (models, materials) = tobj::load_obj(mesh_path, false).expect("Failed to load file");
//let q = tobj::load_mtl(mtl_file).unwrap();
println!("# of models: {}", models.len());
println!("# of materials: {}", materials.len());
//let model = models.get(2).unwrap();
//let mesh = &model.mesh;
let mut index_data : Vec<u32> = Vec::new();
let mut vertex_data = Vec::new();
for model in models {
let mesh = &model.mesh;
let mut next_face = 0;
for f in 0..mesh.num_face_indices.len() {
let end = next_face + mesh.num_face_indices[f] as usize;
let face_indices: Vec<_> = mesh.indices[next_face..end].iter().collect();
for i in face_indices {
index_data.push(*i);
}
//println!(" face[{}] = {:?}", f, face_indices);
next_face = end;
}
// Normals and texture coordinates are also loaded, but not printed in this example
//println!("model[{}].vertices: {}", i, mesh.positions.len() / 3);
assert!(mesh.positions.len() % 3 == 0);
for v in 0..mesh.positions.len() / 3 {
vertex_data.push(
vertex([
mesh.positions[3 * v],
mesh.positions[3 * v + 1],
mesh.positions[3 * v + 2]
],
[
mesh.normals[3 * v],
mesh.normals[3 * v + 1],
mesh.normals[3 * v + 2]
],
));
}
}
println!("{:?}\n\n\n\n\n {:?}", vertex_data, index_data);
(vertex_data.to_vec(), index_data.to_vec())
}
fn create_plane(size: f32) -> (Vec<Vertex>, Vec<u32>) {
let vertex_data = [
vertex([size, -size, 0.0], [0.0, 0.0, 1.0]),
vertex([size, size, 0.0], [0.0, 0.0, 1.0]),
vertex([-size, -size, 0.0], [0.0, 0.0, 1.0]),
vertex([-size, size, 0.0], [0.0, 0.0, 1.0]),
];
let index_data: &[u32] = &[0, 1, 2, 2, 1, 3];
(vertex_data.to_vec(), index_data.to_vec())
}

49
src/light.rs
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@ -0,0 +1,49 @@
use bytemuck::__core::ops::Range;
use bytemuck::{Zeroable, Pod};
struct Light {
pos: cgmath::Point3<f32>,
color: wgpu::Color,
fov: f32,
depth: Range<f32>,
target_view: wgpu::TextureView,
}
#[repr(C)]
#[derive(Clone, Copy)]
struct LightRaw {
proj: [[f32; 4]; 4],
pos: [f32; 4],
color: [f32; 4],
}
unsafe impl Pod for LightRaw {}
unsafe impl Zeroable for LightRaw {}
impl Light {
fn to_raw(&self) -> LightRaw {
use cgmath::{Deg, EuclideanSpace, Matrix4, PerspectiveFov, Point3, Vector3};
let mx_view = Matrix4::look_at(self.pos, Point3::origin(), Vector3::unit_z());
let projection = PerspectiveFov {
fovy: Deg(self.fov).into(),
aspect: 1.0,
near: self.depth.start,
far: self.depth.end,
};
let mx_correction = framework::OPENGL_TO_WGPU_MATRIX;
let mx_view_proj =
mx_correction * cgmath::Matrix4::from(projection.to_perspective()) * mx_view;
LightRaw {
proj: *mx_view_proj.as_ref(),
pos: [self.pos.x, self.pos.y, self.pos.z, 1.0],
color: [
self.color.r as f32,
self.color.g as f32,
self.color.b as f32,
1.0,
],
}
}
}

1010
src/main.rs
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551
src/render.rs
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@ -0,0 +1,551 @@
use crate::{EntityUniforms, Pass};
use bytemuck::{Pod, Zeroable};
use bytemuck::__core::mem;
use wgpu::util::DeviceExt;
use std::rc::Rc;
#[repr(C)]
#[derive(Clone, Copy)]
struct ForwardUniforms {
proj: [[f32; 4]; 4],
num_lights: [u32; 4],
}
unsafe impl Pod for ForwardUniforms {}
unsafe impl Zeroable for ForwardUniforms {}
#[repr(C)]
#[derive(Clone, Copy)]
struct EntityUniforms {
model: [[f32; 4]; 4],
color: [f32; 4],
}
unsafe impl Pod for EntityUniforms {}
unsafe impl Zeroable for EntityUniforms {}
#[repr(C)]
struct ShadowUniforms {
proj: [[f32; 4]; 4],
}
struct Pass {
pipeline: wgpu::RenderPipeline,
bind_group: wgpu::BindGroup,
uniform_buf: wgpu::Buffer,
}
pub struct Renderer {
lights_are_dirty: bool,
shadow_pass: Pass,
forward_pass: Pass,
forward_depth: wgpu::TextureView,
light_uniform_buf: wgpu::Buffer,
}
impl Renderer {
const MAX_LIGHTS: usize = 10;
const SHADOW_FORMAT: wgpu::TextureFormat = wgpu::TextureFormat::Depth32Float;
const SHADOW_SIZE: wgpu::Extent3d = wgpu::Extent3d {
width: 512,
height: 512,
depth: Self::MAX_LIGHTS as u32,
};
const DEPTH_FORMAT: wgpu::TextureFormat = wgpu::TextureFormat::Depth32Float;
fn generate_matrix(aspect_ratio: f32) -> cgmath::Matrix4<f32> {
let mx_projection = cgmath::perspective(cgmath::Deg(45f32), aspect_ratio, 1.0, 20.0);
let mx_view = cgmath::Matrix4::look_at(
cgmath::Point3::new(3.0f32, -10.0, 6.0),
cgmath::Point3::new(0f32, 0.0, 0.0),
cgmath::Vector3::unit_z(),
);
let mx_correction = framework::OPENGL_TO_WGPU_MATRIX;
mx_correction * mx_projection * mx_view
}
}
impl Renderer {
pub fn create_buffer(&mut self, device: &wgpu::Device) {
// Creates the vertex and index buffers for the cube
let vertex_size = mem::size_of::<Vertex>();
let (cube_vertex_data, cube_index_data) = import_mesh("/home/mrh/source/3d-min-viable-eng/resources/my_tree.obj");
let cube_vertex_buf = Rc::new(device.create_buffer_init(
&wgpu::util::BufferInitDescriptor {
label: Some("Cubes Vertex Buffer"),
contents: bytemuck::cast_slice(&cube_vertex_data),
usage: wgpu::BufferUsage::VERTEX,
},
));
let cube_index_buf = Rc::new(device.create_buffer_init(
&wgpu::util::BufferInitDescriptor {
label: Some("Cubes Index Buffer"),
contents: bytemuck::cast_slice(&cube_index_data),
usage: wgpu::BufferUsage::INDEX,
},
));
// Creates the vertex and index buffers for the plane
let (plane_vertex_data, plane_index_data) = create_plane(7.0);
let plane_vertex_buf = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
label: Some("Plane Vertex Buffer"),
contents: bytemuck::cast_slice(&plane_vertex_data),
usage: wgpu::BufferUsage::VERTEX,
});
let plane_index_buf = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
label: Some("Plane Index Buffer"),
contents: bytemuck::cast_slice(&plane_index_data),
usage: wgpu::BufferUsage::INDEX,
});
// Creates the uniform for entities, which does the rotation and projection
let entity_uniform_size = mem::size_of::<EntityUniforms>() as wgpu::BufferAddress;
let plane_uniform_buf = device.create_buffer(&wgpu::BufferDescriptor {
label: None,
size: entity_uniform_size,
usage: wgpu::BufferUsage::UNIFORM | wgpu::BufferUsage::COPY_DST,
mapped_at_creation: false,
});
}
pub fn init(&mut self) -> Renderer {
// Pre init the light uniform, with slots enough for MAX_LIGHTS
let light_uniform_size =
(Self::MAX_LIGHTS * mem::size_of::<LightRaw>()) as wgpu::BufferAddress;
let light_uniform_buf = device.create_buffer(&wgpu::BufferDescriptor {
label: None,
size: light_uniform_size,
usage: wgpu::BufferUsage::UNIFORM
| wgpu::BufferUsage::COPY_SRC
| wgpu::BufferUsage::COPY_DST,
mapped_at_creation: false,
});
// This seems way way way way easier than what I was doing in tracer
// Though the attr thing is still a macro. Which would cause issues if
// I wanted to get tricky with the 0,1 types
let vertex_attr = wgpu::vertex_attr_array![0 => Float4, 1 => Float4];
let vb_desc = wgpu::VertexBufferDescriptor {
stride: vertex_size as wgpu::BufferAddress,
step_mode: wgpu::InputStepMode::Vertex,
attributes: &vertex_attr,
};
/*
There appear to be two passes required for shadows, the shadow pass, and the forward pass
Need to open this up in renderdoc and see what it's actually doing
*/
let shadow_pass = {
let uniform_size = mem::size_of::<ShadowUniforms>() as wgpu::BufferAddress;
// Create pipeline layout
let bind_group_layout =
device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
label: None,
entries: &[wgpu::BindGroupLayoutEntry {
binding: 0, // global
visibility: wgpu::ShaderStage::VERTEX,
ty: wgpu::BindingType::UniformBuffer {
dynamic: false,
min_binding_size: wgpu::BufferSize::new(uniform_size),
},
count: None,
}],
});
let pipeline_layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
label: Some("shadow"),
bind_group_layouts: &[&bind_group_layout, &local_bind_group_layout],
push_constant_ranges: &[],
});
let uniform_buf = device.create_buffer(&wgpu::BufferDescriptor {
label: None,
size: uniform_size,
usage: wgpu::BufferUsage::UNIFORM | wgpu::BufferUsage::COPY_DST,
mapped_at_creation: false,
});
// Create bind group
let bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
layout: &bind_group_layout,
entries: &[wgpu::BindGroupEntry {
binding: 0,
resource: wgpu::BindingResource::Buffer(uniform_buf.slice(..)),
}],
label: None,
});
// Create the render pipeline
let vs_module = device.create_shader_module(wgpu::include_spirv!("../resources/bake.vert.spv"));
let fs_module = device.create_shader_module(wgpu::include_spirv!("../resources/bake.frag.spv"));
let pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
label: Some("shadow"),
layout: Some(&pipeline_layout),
vertex_stage: wgpu::ProgrammableStageDescriptor {
module: &vs_module,
entry_point: "main",
},
fragment_stage: Some(wgpu::ProgrammableStageDescriptor {
module: &fs_module,
entry_point: "main",
}),
rasterization_state: Some(wgpu::RasterizationStateDescriptor {
front_face: wgpu::FrontFace::Ccw,
cull_mode: wgpu::CullMode::Back,
depth_bias: 2, // corresponds to bilinear filtering
depth_bias_slope_scale: 2.0,
depth_bias_clamp: 0.0,
clamp_depth: device.features().contains(wgpu::Features::DEPTH_CLAMPING),
}),
primitive_topology: wgpu::PrimitiveTopology::TriangleList,
color_states: &[],
depth_stencil_state: Some(wgpu::DepthStencilStateDescriptor {
format: Self::SHADOW_FORMAT,
depth_write_enabled: true,
depth_compare: wgpu::CompareFunction::LessEqual,
stencil: wgpu::StencilStateDescriptor::default(),
}),
vertex_state: wgpu::VertexStateDescriptor {
index_format: wgpu::IndexFormat::Uint32,
vertex_buffers: &[vb_desc.clone()],
},
sample_count: 1,
sample_mask: !0,
alpha_to_coverage_enabled: false,
});
Pass {
pipeline,
bind_group,
uniform_buf,
}
};
let forward_pass = {
// Create pipeline layout
let bind_group_layout =
device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
entries: &[
wgpu::BindGroupLayoutEntry {
binding: 0, // global
visibility: wgpu::ShaderStage::VERTEX | wgpu::ShaderStage::FRAGMENT,
ty: wgpu::BindingType::UniformBuffer {
dynamic: false,
min_binding_size: wgpu::BufferSize::new(mem::size_of::<
ForwardUniforms,
>()
as _),
},
count: None,
},
wgpu::BindGroupLayoutEntry {
binding: 1, // lights
visibility: wgpu::ShaderStage::VERTEX | wgpu::ShaderStage::FRAGMENT,
ty: wgpu::BindingType::UniformBuffer {
dynamic: false,
min_binding_size: wgpu::BufferSize::new(light_uniform_size),
},
count: None,
},
wgpu::BindGroupLayoutEntry {
binding: 2,
visibility: wgpu::ShaderStage::FRAGMENT,
ty: wgpu::BindingType::SampledTexture {
multisampled: false,
component_type: wgpu::TextureComponentType::Float,
dimension: wgpu::TextureViewDimension::D2Array,
},
count: None,
},
wgpu::BindGroupLayoutEntry {
binding: 3,
visibility: wgpu::ShaderStage::FRAGMENT,
ty: wgpu::BindingType::Sampler { comparison: true },
count: None,
},
],
label: None,
});
let pipeline_layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
label: Some("main"),
bind_group_layouts: &[&bind_group_layout, &local_bind_group_layout],
push_constant_ranges: &[],
});
let mx_total = Self::generate_matrix(sc_desc.width as f32 / sc_desc.height as f32);
let forward_uniforms = ForwardUniforms {
proj: *mx_total.as_ref(),
num_lights: [lights.len() as u32, 0, 0, 0],
};
let uniform_buf = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
label: Some("Uniform Buffer"),
contents: bytemuck::bytes_of(&forward_uniforms),
usage: wgpu::BufferUsage::UNIFORM | wgpu::BufferUsage::COPY_DST,
});
// Create bind group
let bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
layout: &bind_group_layout,
entries: &[
wgpu::BindGroupEntry {
binding: 0,
resource: wgpu::BindingResource::Buffer(uniform_buf.slice(..)),
},
wgpu::BindGroupEntry {
binding: 1,
resource: wgpu::BindingResource::Buffer(light_uniform_buf.slice(..)),
},
wgpu::BindGroupEntry {
binding: 2,
resource: wgpu::BindingResource::TextureView(&shadow_view),
},
wgpu::BindGroupEntry {
binding: 3,
resource: wgpu::BindingResource::Sampler(&shadow_sampler),
},
],
label: None,
});
// Create the render pipeline
let vs_module = device.create_shader_module(wgpu::include_spirv!("../resources/forward.vert.spv"));
let fs_module = device.create_shader_module(wgpu::include_spirv!("../resources/forward.frag.spv"));
let pipeline = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
label: Some("main"),
layout: Some(&pipeline_layout),
vertex_stage: wgpu::ProgrammableStageDescriptor {
module: &vs_module,
entry_point: "main",
},
fragment_stage: Some(wgpu::ProgrammableStageDescriptor {
module: &fs_module,
entry_point: "main",
}),
rasterization_state: Some(wgpu::RasterizationStateDescriptor {
front_face: wgpu::FrontFace::Ccw,
cull_mode: wgpu::CullMode::Back,
..Default::default()
}),
primitive_topology: wgpu::PrimitiveTopology::TriangleList,
color_states: &[sc_desc.format.into()],
depth_stencil_state: Some(wgpu::DepthStencilStateDescriptor {
format: Self::DEPTH_FORMAT,
depth_write_enabled: true,
depth_compare: wgpu::CompareFunction::Less,
stencil: wgpu::StencilStateDescriptor::default(),
}),
vertex_state: wgpu::VertexStateDescriptor {
index_format: wgpu::IndexFormat::Uint32,
vertex_buffers: &[vb_desc],
},
sample_count: 1,
sample_mask: !0,
alpha_to_coverage_enabled: false,
});
Pass {
pipeline,
bind_group,
uniform_buf,
}
};
let depth_texture = device.create_texture(&wgpu::TextureDescriptor {
size: wgpu::Extent3d {
width: sc_desc.width,
height: sc_desc.height,
depth: 1,
},
mip_level_count: 1,
sample_count: 1,
dimension: wgpu::TextureDimension::D2,
format: Self::DEPTH_FORMAT,
usage: wgpu::TextureUsage::OUTPUT_ATTACHMENT,
label: None,
});
Renderer {
lights_are_dirty: false,
shadow_pass,
forward_pass,
forward_depth: depth_texture.create_view(&wgpu::TextureViewDescriptor::default()),
light_uniform_buf,
}
}
pub fn render(
&mut self,
frame: &wgpu::SwapChainTexture,
device: &wgpu::Device,
queue: &wgpu::Queue,
_spawner: &impl futures::task::LocalSpawn,
)
{
// update uniforms
for entity in self.entities.iter_mut() {
if entity.rotation_speed != 0.0 {
let rotation = cgmath::Matrix4::from_angle_x(cgmath::Deg(entity.rotation_speed));
entity.mx_world = entity.mx_world * rotation;
}
let data = EntityUniforms {
model: entity.mx_world.into(),
color: [
entity.color.r as f32,
entity.color.g as f32,
entity.color.b as f32,
entity.color.a as f32,
],
};
queue.write_buffer(&entity.uniform_buf, 0, bytemuck::bytes_of(&data));
}
if self.lights_are_dirty {
self.lights_are_dirty = false;
for (i, light) in self.lights.iter().enumerate() {
queue.write_buffer(
&self.light_uniform_buf,
(i * mem::size_of::<LightRaw>()) as wgpu::BufferAddress,
bytemuck::bytes_of(&light.to_raw()),
);
}
}
let mut encoder =
device.create_command_encoder(&wgpu::CommandEncoderDescriptor { label: None });
encoder.push_debug_group("shadow passes");
for (i, light) in self.lights.iter().enumerate() {
encoder.push_debug_group(&format!(
"shadow pass {} (light at position {:?})",
i, light.pos
));
// The light uniform buffer already has the projection,
// let's just copy it over to the shadow uniform buffer.
encoder.copy_buffer_to_buffer(
&self.light_uniform_buf,
(i * mem::size_of::<LightRaw>()) as wgpu::BufferAddress,
&self.shadow_pass.uniform_buf,
0,
64,
);
encoder.insert_debug_marker("render entities");
{
let mut pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
color_attachments: &[],
depth_stencil_attachment: Some(
wgpu::RenderPassDepthStencilAttachmentDescriptor {
attachment: &light.target_view,
depth_ops: Some(wgpu::Operations {
load: wgpu::LoadOp::Clear(1.0),
store: true,
}),
stencil_ops: None,
},
),
});
pass.set_pipeline(&self.shadow_pass.pipeline);
pass.set_bind_group(0, &self.shadow_pass.bind_group, &[]);
for entity in &self.entities {
pass.set_bind_group(1, &entity.bind_group, &[]);
pass.set_index_buffer(entity.index_buf.slice(..));
pass.set_vertex_buffer(0, entity.vertex_buf.slice(..));
pass.draw_indexed(0..entity.index_count as u32, 0, 0..1);
}
}
encoder.pop_debug_group();
}
encoder.pop_debug_group();
// forward pass
encoder.push_debug_group("forward rendering pass");
{
let mut pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
color_attachments: &[wgpu::RenderPassColorAttachmentDescriptor {
attachment: &frame.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: Some(wgpu::RenderPassDepthStencilAttachmentDescriptor {
attachment: &self.forward_depth,
depth_ops: Some(wgpu::Operations {
load: wgpu::LoadOp::Clear(1.0),
store: false,
}),
stencil_ops: None,
}),
});
pass.set_pipeline(&self.forward_pass.pipeline);
pass.set_bind_group(0, &self.forward_pass.bind_group, &[]);
for entity in &self.entities {
pass.set_bind_group(1, &entity.bind_group, &[]);
pass.set_index_buffer(entity.index_buf.slice(..));
pass.set_vertex_buffer(0, entity.vertex_buf.slice(..));
pass.draw_indexed(0..entity.index_count as u32, 0, 0..1);
}
}
encoder.pop_debug_group();
queue.submit(iter::once(encoder.finish()));
}
pub fn optional_features() -> wgpu::Features {
wgpu::Features::DEPTH_CLAMPING
}
pub fn resize(
&mut self,
sc_desc: &wgpu::SwapChainDescriptor,
device: &wgpu::Device,
queue: &wgpu::Queue,
)
{
// update view-projection matrix
let mx_total = Self::generate_matrix(sc_desc.width as f32 / sc_desc.height as f32);
let mx_ref: &[f32; 16] = mx_total.as_ref();
queue.write_buffer(
&self.forward_pass.uniform_buf,
0,
bytemuck::cast_slice(mx_ref),
);
let depth_texture = device.create_texture(&wgpu::TextureDescriptor {
size: wgpu::Extent3d {
width: sc_desc.width,
height: sc_desc.height,
depth: 1,
},
mip_level_count: 1,
sample_count: 1,
dimension: wgpu::TextureDimension::D2,
format: Self::DEPTH_FORMAT,
usage: wgpu::TextureUsage::OUTPUT_ATTACHMENT,
label: None,
});
self.forward_depth = depth_texture.create_view(&wgpu::TextureViewDescriptor::default());
}
}

202
src/runtime.rs
Unescape View File

@ -0,0 +1,202 @@
use crate::ShadowUniforms;
use bytemuck::__core::mem;
use std::rc::Rc;
struct Entity {
mx_world: cgmath::Matrix4<f32>,
rotation_speed: f32,
color: wgpu::Color,
vertex_buf: Rc<wgpu::Buffer>,
index_buf: Rc<wgpu::Buffer>,
index_count: usize,
bind_group: wgpu::BindGroup,
uniform_buf: wgpu::Buffer,
}
pub struct Runtime {
entities: Vec<Entity>, // This is going to be ECS'd
lights: Vec<Light>, // ECS
}
impl Runtime {
pub fn init(
sc_desc: &wgpu::SwapChainDescriptor,
device: &wgpu::Device,
_queue: &wgpu::Queue, ) -> Self
{
// https://sotrh.github.io/learn-wgpu/beginner/tutorial5-textures/#the-bindgroup
// It appears like bindgroups are
// Defines the Uniform buffer for the Vertex and Fragment shaders
let local_bind_group_layout =
device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
entries: &[wgpu::BindGroupLayoutEntry {
binding: 0,
visibility: wgpu::ShaderStage::VERTEX | wgpu::ShaderStage::FRAGMENT,
ty: wgpu::BindingType::UniformBuffer {
dynamic: false,
min_binding_size: wgpu::BufferSize::new(
mem::size_of::<EntityUniforms>() as _
),
},
count: None,
}],
label: None,
});
let mut entities = vec![{
use cgmath::SquareMatrix;
let bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
layout: &local_bind_group_layout,
entries: &[wgpu::BindGroupEntry {
binding: 0,
resource: wgpu::BindingResource::Buffer(plane_uniform_buf.slice(..)),
}],
label: None,
});
Entity {
mx_world: cgmath::Matrix4::identity(),
rotation_speed: 0.0,
color: wgpu::Color::WHITE,
vertex_buf: Rc::new(plane_vertex_buf),
index_buf: Rc::new(plane_index_buf),
index_count: plane_index_data.len(),
bind_group,
uniform_buf: plane_uniform_buf,
}
}];
struct CubeDesc {
offset: cgmath::Vector3<f32>,
angle: f32,
scale: f32,
rotation: f32,
}
let cube_descs = [
CubeDesc {
offset: cgmath::vec3(-2.0, -2.0, 2.0),
angle: 10.0,
scale: 0.7,
rotation: 1.5,
},
];
for cube in &cube_descs {
use cgmath::{Decomposed, Deg, InnerSpace, Quaternion, Rotation3};
let transform = Decomposed {
disp: cube.offset.clone(),
rot: Quaternion::from_axis_angle(cube.offset.normalize(), Deg(cube.angle)),
scale: cube.scale,
};
let uniform_buf = device.create_buffer(&wgpu::BufferDescriptor {
label: None,
size: entity_uniform_size,
usage: wgpu::BufferUsage::UNIFORM | wgpu::BufferUsage::COPY_DST,
mapped_at_creation: false,
});
entities.push(Entity {
mx_world: cgmath::Matrix4::from(transform),
rotation_speed: cube.rotation,
color: wgpu::Color::GREEN,
vertex_buf: Rc::clone(&cube_vertex_buf),
index_buf: Rc::clone(&cube_index_buf),
index_count: cube_index_data.len(),
bind_group: device.create_bind_group(&wgpu::BindGroupDescriptor {
layout: &local_bind_group_layout,
entries: &[wgpu::BindGroupEntry {
binding: 0,
resource: wgpu::BindingResource::Buffer(uniform_buf.slice(..)),
}],
label: None,
}),
uniform_buf,
});
}
// Create other resources
let shadow_sampler = device.create_sampler(&wgpu::SamplerDescriptor {
label: Some("shadow"),
address_mode_u: wgpu::AddressMode::ClampToEdge,
address_mode_v: wgpu::AddressMode::ClampToEdge,
address_mode_w: wgpu::AddressMode::ClampToEdge,
mag_filter: wgpu::FilterMode::Linear,
min_filter: wgpu::FilterMode::Linear,
mipmap_filter: wgpu::FilterMode::Nearest,
compare: Some(wgpu::CompareFunction::LessEqual),
..Default::default()
});
let shadow_texture = device.create_texture(&wgpu::TextureDescriptor {
size: Self::SHADOW_SIZE,
mip_level_count: 1,
sample_count: 1,
dimension: wgpu::TextureDimension::D2,
format: Self::SHADOW_FORMAT,
usage: wgpu::TextureUsage::OUTPUT_ATTACHMENT | wgpu::TextureUsage::SAMPLED,
label: None,
});
let shadow_view = shadow_texture.create_view(&wgpu::TextureViewDescriptor::default());
let mut shadow_target_views = (0..2)
.map(|i| {
Some(shadow_texture.create_view(&wgpu::TextureViewDescriptor {
label: Some("shadow"),
format: None,
dimension: Some(wgpu::TextureViewDimension::D2),
aspect: wgpu::TextureAspect::All,
base_mip_level: 0,
level_count: None,
base_array_layer: i as u32,
array_layer_count: NonZeroU32::new(1),
}))
})
.collect::<Vec<_>>();
// This is just metadata we hold for the lights. We can hold onto this
let lights = vec![
Light {
pos: cgmath::Point3::new(7.0, -5.0, 10.0),
color: wgpu::Color {
r: 0.5,
g: 1.0,
b: 0.5,
a: 1.0,
},
fov: 60.0,
depth: 1.0..20.0,
target_view: shadow_target_views[0].take().unwrap(),
},
Light {
pos: cgmath::Point3::new(-5.0, 7.0, 10.0),
color: wgpu::Color {
r: 1.0,
g: 0.5,
b: 0.5,
a: 1.0,
},
fov: 45.0,
depth: 1.0..20.0,
target_view: shadow_target_views[1].take().unwrap(),
},
];
Runtime {
entities,
lights,
lights_are_dirty: true,
light_uniform_buf,
}
}
pub fn update(&mut self, _event: winit::event::WindowEvent) {
//empty
}
}
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