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snowflakewgpu.rs
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snowflakewgpu.rs
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use nannou::prelude::*;
use nannou_egui::{self, egui, Egui};
struct Model {
render_pipeline: wgpu::RenderPipeline,
vertex_buffer: wgpu::Buffer,
time_uniform: wgpu::Buffer,
time_bind_group: wgpu::BindGroup,
params_uniform: wgpu::Buffer,
params_bind_group: wgpu::BindGroup,
settings:Settings,
egui:Egui,
}
struct Settings {
lambda: f32,
theta: f32,
alpha:f32,
sigma: f32,
gamma:f32,
blue:f32,
show_ui: bool,
}
#[repr(C)]
#[derive(Clone, Copy)]
struct Vertex {
position: [f32; 2],
}
const VERTICES: [Vertex; 6] = [
Vertex { position: [-1.0, -1.0] },
Vertex { position: [ 1.0, -1.0] },
Vertex { position: [-1.0, 1.0] },
Vertex { position: [ 1.0, -1.0] },
Vertex { position: [ 1.0, 1.0] },
Vertex { position: [-1.0, 1.0] },
];
fn main() {
nannou::app(model)
.update(update)
.run();
}
fn update(app: &App, model: &mut Model, update: Update) {
let egui = &mut model.egui;
egui.set_elapsed_time(update.since_start);
let ctx = egui.begin_frame();
if app.keys.down.contains(&Key::H) {
model.settings.show_ui = !model.settings.show_ui;
}
egui::Window::new("Shader Settings").show(&ctx, |ui| {
ui.add(egui::Slider::new(&mut model.settings.lambda, 2.0..=16.0).text("l"));
ui.add(egui::Slider::new(&mut model.settings.theta, -1.0..=5.5).text("t"));
ui.add(egui::Slider::new(&mut model.settings.alpha, -0.3055..=2.05).text("a"));
ui.add(egui::Slider::new(&mut model.settings.sigma, -0.1..=3.0).text("r"));
ui.add(egui::Slider::new(&mut model.settings.gamma, -1.0..=5.0).text("g"));
ui.add(egui::Slider::new(&mut model.settings.blue, -0.5..=0.5).text("b"));
});
let params_data = [model.settings.lambda, model.settings.theta,model.settings.alpha, model.settings.sigma,model.settings.gamma,model.settings.blue];
let params_bytes = bytemuck::cast_slice(¶ms_data);
app.main_window().queue().write_buffer(&model.params_uniform, 0, ¶ms_bytes);
}
fn raw_window_event(app: &App, model: &mut Model, event: &nannou::winit::event::WindowEvent) {
model.egui.handle_raw_event(event);
if let nannou::winit::event::WindowEvent::KeyboardInput { input, .. } = event {
if let (Some(nannou::winit::event::VirtualKeyCode::F), true) =
(input.virtual_keycode, input.state == nannou::winit::event::ElementState::Pressed)
{
let window = app.main_window();
let fullscreen = window.fullscreen().is_some();
window.set_fullscreen(!fullscreen);
}
}
}
fn model(app: &App) -> Model {
let w_id = app.new_window().raw_event(raw_window_event).
size(512, 512).view(view).build().unwrap();
let window = app.window(w_id).unwrap();
let device = window.device();
let format = Frame::TEXTURE_FORMAT;
let sample_count = window.msaa_samples();
let vs_desc = wgpu::include_wgsl!("../shaders/vs.wgsl");
let fs_desc = wgpu::include_wgsl!("../shaders/snowflakewgpu.wgsl");
let vs_mod = device.create_shader_module(vs_desc);
let fs_mod = device.create_shader_module(fs_desc);
let vertices_bytes = vertices_as_bytes(&VERTICES[..]);
let usage = wgpu::BufferUsages::VERTEX;
let vertex_buffer = device.create_buffer_init(&BufferInitDescriptor {
label: None,
contents: vertices_bytes,
usage,
});
let time_bind_group_layout = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
entries: &[
wgpu::BindGroupLayoutEntry {
binding: 0,
visibility: wgpu::ShaderStages::FRAGMENT,
ty: wgpu::BindingType::Buffer {
ty: wgpu::BufferBindingType::Uniform,
has_dynamic_offset: false,
min_binding_size: wgpu::BufferSize::new(std::mem::size_of::<f32>() as _),
},
count: None,
},
],
label: Some("time_bind_group_layout"),
});
let params_bind_group_layout = device.create_bind_group_layout(&wgpu::BindGroupLayoutDescriptor {
label: Some("params_bind_group_layout"),
entries: &[wgpu::BindGroupLayoutEntry {
binding: 1,
visibility: wgpu::ShaderStages::FRAGMENT,
ty: wgpu::BindingType::Buffer {
ty: wgpu::BufferBindingType::Uniform,
has_dynamic_offset: false,
min_binding_size: wgpu::BufferSize::new((std::mem::size_of::<f32>() * 6) as _),
},
count: None,
}],
});
let pipeline_layout = device.create_pipeline_layout(&wgpu::PipelineLayoutDescriptor {
label: Some("Pipeline Layout"),
bind_group_layouts: &[¶ms_bind_group_layout, &time_bind_group_layout],
push_constant_ranges: &[],
});
let render_pipeline = wgpu::RenderPipelineBuilder::from_layout(&pipeline_layout, &vs_mod)
.fragment_shader(&fs_mod)
.color_format(format)
.add_vertex_buffer::<Vertex>(&wgpu::vertex_attr_array![0 => Float32x2])
.sample_count(sample_count)
.build(device);
let time_uniform = device.create_buffer(&wgpu::BufferDescriptor {
label: Some("Time Uniform Buffer"),
size: std::mem::size_of::<f32>() as wgpu::BufferAddress,
usage: wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST,
mapped_at_creation: false,
});
let time_bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
layout: &time_bind_group_layout,
entries: &[
wgpu::BindGroupEntry {
binding: 0,
resource: time_uniform.as_entire_binding(),
},
],
label: Some("time_bind_group"),
});
let settings = Settings {
lambda: 5.0,
theta:0.6,
alpha:0.8,
sigma:1.0,
gamma:0.9,
blue:0.05,
show_ui:true,
};
let params_data = [settings.lambda, settings.theta, settings.alpha,settings.sigma,settings.gamma,settings.blue];
let params_bytes = bytemuck::cast_slice(¶ms_data);
let params_uniform = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
label: Some("Params Uniform"),
contents: params_bytes,
usage: wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST,
});
let params_bind_group = device.create_bind_group(&wgpu::BindGroupDescriptor {
layout: ¶ms_bind_group_layout,
entries: &[
wgpu::BindGroupEntry {
binding: 1,
resource: params_uniform.as_entire_binding(),
},
],
label: Some("params_bind_group"),
});
let window = app.window(w_id).unwrap();
let egui = Egui::from_window(&window);
Model {
params_bind_group,
settings,
params_uniform,
egui,
vertex_buffer,
render_pipeline,
time_uniform,
time_bind_group,
}
}
fn view(app: &App, model: &Model, frame: Frame) {
let draw = app.draw();
draw.background().color(BLACK);
let time = app.time;
let time_bytes = time.to_ne_bytes();
let binding = app.main_window();
let queue = binding.queue();
{
let mut encoder = frame.command_encoder();
queue.write_buffer(&model.time_uniform, 0, &time_bytes);
let mut render_pass = wgpu::RenderPassBuilder::new()
.color_attachment(frame.texture_view(), |color| color)
.begin(&mut encoder);
render_pass.set_bind_group(0, &model.params_bind_group, &[]);
render_pass.set_bind_group(1, &model.time_bind_group, &[]);
render_pass.set_pipeline(&model.render_pipeline);
render_pass.set_vertex_buffer(0, model.vertex_buffer.slice(..));
let vertex_range = 0..VERTICES.len() as u32;
let instance_range = 0..1;
render_pass.draw(vertex_range, instance_range);
}
if model.settings.show_ui {
model.egui.draw_to_frame(&frame).unwrap();
}
if app.keys.down.contains(&Key::Space) {
let file_path = app
.project_path()
.expect("failed to locate project directory")
.join("frames")
.join(format!("{:0}.png", app.elapsed_frames()));
app.main_window().capture_frame(file_path);
}
}
fn vertices_as_bytes(data: &[Vertex]) -> &[u8] {
unsafe { wgpu::bytes::from_slice(data) }
}