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use cuneus::prelude::ComputeShader;
use cuneus::{Core, ExportManager, RenderKit, ShaderApp, ShaderControls, ShaderManager, UniformProvider};
use cuneus::WindowEvent;
use winit::event::{ElementState, MouseButton, MouseScrollDelta};
#[repr(C)]
#[derive(Copy, Clone, Debug, bytemuck::Pod, bytemuck::Zeroable)]
pub struct ShaderParams {
base_color: [f32; 3],
x: f32,
rim_color: [f32; 3],
y: f32,
accent_color: [f32; 3],
gamma_correction: f32,
travel_speed: f32,
iteration: i32,
col_ext: f32,
zoom: f32,
trap_pow: f32,
trap_x: f32,
trap_y: f32,
trap_c1: f32,
aa: i32,
trap_s1: f32,
wave_speed: f32,
fold_intensity: f32,
}
impl UniformProvider for ShaderParams {
fn as_bytes(&self) -> &[u8] {
bytemuck::bytes_of(self)
}
}
struct Shader {
base: RenderKit,
compute_shader: ComputeShader,
mouse_dragging: bool,
drag_start: [f32; 2],
drag_start_pos: [f32; 2],
zoom_level: f32,
current_params: ShaderParams,
}
fn main() -> Result<(), Box<dyn std::error::Error>> {
env_logger::init();
let (app, event_loop) = ShaderApp::new("orbits", 800, 600);
app.run(event_loop, Shader::init)
}
impl ShaderManager for Shader {
fn init(core: &Core) -> Self {
let initial_zoom = 0.0004;
let initial_x = 2.14278;
let initial_y = 2.14278;
// Create texture display layout
let base = RenderKit::new(core);
let config = ComputeShader::builder()
.with_entry_point("main")
.with_custom_uniforms::<ShaderParams>()
.with_mouse()
.build();
let compute_shader = cuneus::compute_shader!(core, "shaders/orbits.wgsl", config);
let initial_params = ShaderParams {
base_color: [0.0, 0.5, 1.0],
x: initial_x,
rim_color: [0.0, 0.5, 1.0],
y: initial_y,
accent_color: [0.018, 0.018, 0.018],
gamma_correction: 0.4,
travel_speed: 1.0,
iteration: 355,
col_ext: 2.0,
zoom: initial_zoom,
trap_pow: 1.0,
trap_x: -0.5,
trap_y: 2.0,
trap_c1: 0.2,
aa: 1,
trap_s1: 0.8,
wave_speed: 0.1,
fold_intensity: 1.0,
};
compute_shader.set_custom_params(initial_params, &core.queue);
Self {
base,
compute_shader,
mouse_dragging: false,
drag_start: [0.0, 0.0],
drag_start_pos: [initial_x, initial_y],
zoom_level: initial_zoom,
current_params: initial_params,
}
}
fn update(&mut self, core: &Core) {
// Handle export
self.compute_shader.handle_export(core, &mut self.base);
}
fn render(&mut self, core: &Core) -> Result<(), cuneus::SurfaceError> {
let mut frame = self.base.begin_frame(core)?;
let mut params = self.current_params;
let mut changed = false;
let mut should_start_export = false;
let mut export_request = self.base.export_manager.get_ui_request();
let mut controls_request = self
.base
.controls
.get_ui_request(&self.base.start_time, &core.size, self.base.fps_tracker.fps());
let full_output = if self.base.key_handler.show_ui {
self.base.render_ui(core, |ctx| {
RenderKit::apply_default_style(ctx);
egui::Window::new("Orbits")
.collapsible(true)
.resizable(true)
.default_width(280.0)
.show(ctx, |ui| {
egui::CollapsingHeader::new("Colors")
.default_open(false)
.show(ui, |ui| {
ui.horizontal(|ui| {
ui.label("Base:");
changed |=
ui.color_edit_button_rgb(&mut params.base_color).changed();
});
ui.horizontal(|ui| {
ui.label("Orbit:");
changed |=
ui.color_edit_button_rgb(&mut params.rim_color).changed();
});
ui.horizontal(|ui| {
ui.label("Exterior:");
changed |= ui
.color_edit_button_rgb(&mut params.accent_color)
.changed();
});
});
egui::CollapsingHeader::new("Rendering")
.default_open(false)
.show(ui, |ui| {
changed |= ui
.add(
egui::Slider::new(&mut params.iteration, 50..=500)
.text("Iterations"),
)
.changed();
changed |= ui
.add(
egui::Slider::new(&mut params.aa, 1..=4)
.text("Anti-aliasing"),
)
.changed();
changed |= ui
.add(
egui::Slider::new(&mut params.gamma_correction, 0.1..=2.0)
.text("Gamma"),
)
.changed();
});
egui::CollapsingHeader::new("Traps")
.default_open(false)
.show(ui, |ui| {
changed |= ui
.add(
egui::Slider::new(&mut params.trap_x, -5.0..=5.0)
.text("Trap X"),
)
.changed();
changed |= ui
.add(
egui::Slider::new(&mut params.trap_y, -5.0..=5.0)
.text("Trap Y"),
)
.changed();
changed |= ui
.add(
egui::Slider::new(&mut params.trap_pow, 0.0..=3.0)
.text("Trap Power"),
)
.changed();
changed |= ui
.add(
egui::Slider::new(&mut params.trap_c1, 0.0..=1.0)
.text("Trap Mix"),
)
.changed();
changed |= ui
.add(
egui::Slider::new(&mut params.trap_s1, 0.0..=2.0)
.text("Trap Blend"),
)
.changed();
});
egui::CollapsingHeader::new("Animation")
.default_open(false)
.show(ui, |ui| {
changed |= ui
.add(
egui::Slider::new(&mut params.travel_speed, 0.0..=2.0)
.text("Travel Speed"),
)
.changed();
changed |= ui
.add(
egui::Slider::new(&mut params.wave_speed, 0.0..=2.0)
.text("Wave Speed"),
)
.changed();
changed |= ui
.add(
egui::Slider::new(&mut params.fold_intensity, 0.0..=3.0)
.text("Fold Intensity"),
)
.changed();
changed |= ui
.add(
egui::Slider::new(&mut params.col_ext, 0.0..=10.0)
.text("Color Extension"),
)
.changed();
});
egui::CollapsingHeader::new("Navigation")
.default_open(false)
.show(ui, |ui| {
ui.label("Left-click + drag: Pan view");
ui.label("Mouse wheel: Zoom");
ui.separator();
let old_zoom = params.zoom;
changed |= ui
.add(
egui::Slider::new(&mut params.zoom, 0.0001..=1.0)
.text("Zoom")
.logarithmic(true),
)
.changed();
if old_zoom != params.zoom {
self.zoom_level = params.zoom;
}
changed |= ui
.add(
egui::Slider::new(&mut params.x, 0.0..=3.0)
.text("X Position"),
)
.changed();
changed |= ui
.add(
egui::Slider::new(&mut params.y, 0.0..=6.0)
.text("Y Position"),
)
.changed();
});
ui.separator();
ShaderControls::render_controls_widget(ui, &mut controls_request);
ui.separator();
should_start_export =
ExportManager::render_export_ui_widget(ui, &mut export_request);
});
})
} else {
self.base.render_ui(core, |_ctx| {})
};
self.base.export_manager.apply_ui_request(export_request);
self.base.apply_control_request(controls_request);
if changed {
self.current_params = params;
self.compute_shader.set_custom_params(params, &core.queue);
}
if should_start_export {
self.base.export_manager.start_export();
}
// Create command encoder
// Update time uniform
let current_time = self.base.controls.get_time(&self.base.start_time);
let delta_time = 1.0 / 60.0;
self.compute_shader
.set_time(current_time, delta_time, &core.queue);
// Update mouse uniform
self.compute_shader
.update_mouse_uniform(&self.base.mouse_tracker.uniform, &core.queue);
// Dispatch compute shader
self.compute_shader.dispatch(&mut frame.encoder, core);
self.base.renderer.render_to_view(&mut frame.encoder, &frame.view, &self.compute_shader.get_output_texture().bind_group);
self.base.end_frame(core, frame, full_output);
Ok(())
}
fn resize(&mut self, core: &Core) {
self.base.default_resize(core, &mut self.compute_shader);
}
fn handle_input(&mut self, core: &Core, event: &WindowEvent) -> bool {
if self.base.default_handle_input(core, event) {
return true;
}
match event {
WindowEvent::MouseInput { state, button, .. } => {
if button == &MouseButton::Left {
match state {
ElementState::Pressed => {
let mouse_pos = self.base.mouse_tracker.uniform.position;
self.mouse_dragging = true;
self.drag_start = mouse_pos;
self.drag_start_pos = [self.current_params.x, self.current_params.y];
return true;
}
ElementState::Released => {
self.mouse_dragging = false;
return true;
}
}
}
false
}
WindowEvent::CursorMoved { .. } => {
if self.mouse_dragging {
let current_pos = self.base.mouse_tracker.uniform.position;
let dx = (current_pos[0] - self.drag_start[0]) * 3.0 * self.zoom_level;
let dy = (current_pos[1] - self.drag_start[1]) * 6.0 * self.zoom_level;
let mut new_x = self.drag_start_pos[0] + dx;
let mut new_y = self.drag_start_pos[1] + dy;
new_x = new_x.clamp(0.0, 3.0);
new_y = new_y.clamp(0.0, 6.0);
self.current_params.x = new_x;
self.current_params.y = new_y;
self.compute_shader
.set_custom_params(self.current_params, &core.queue);
}
self.base.handle_mouse_input(core, event, false)
}
WindowEvent::MouseWheel { delta, .. } => {
let zoom_delta = match delta {
MouseScrollDelta::LineDelta(_, y) => *y * 0.1,
MouseScrollDelta::PixelDelta(pos) => (pos.y as f32) * 0.001,
};
if zoom_delta != 0.0 {
let mouse_pos = self.base.mouse_tracker.uniform.position;
let center_x = self.current_params.x;
let center_y = self.current_params.y;
let rel_x = mouse_pos[0] - 0.5;
let rel_y = mouse_pos[1] - 0.5;
let zoom_factor = if zoom_delta > 0.0 { 0.9 } else { 1.1 };
self.zoom_level = (self.zoom_level * zoom_factor).clamp(0.0001, 1.5);
let scale_change = 1.0 - zoom_factor;
let dx = rel_x * scale_change * 3.0 * self.zoom_level;
let dy = rel_y * scale_change * 6.0 * self.zoom_level;
self.current_params.zoom = self.zoom_level;
self.current_params.x = (center_x + dx).clamp(0.0, 3.0);
self.current_params.y = (center_y + dy).clamp(0.0, 6.0);
self.compute_shader
.set_custom_params(self.current_params, &core.queue);
}
self.base.handle_mouse_input(core, event, false)
}
_ => self.base.handle_mouse_input(core, event, false),
}
}
}