use cuneus::prelude::ComputeShader;
use cuneus::{Core, RenderKit, ShaderApp, ShaderManager};
use cuneus::WindowEvent;
cuneus::uniform_params! {
struct ShaderParams {
scale: f32,
offset_value: f32,
cell_index: f32,
edge_width: f32,
highlight: f32,
_pad_m1: f32,
_pad_m2: f32,
_pad_m3: f32,
}
}
fn main() -> Result<(), Box<dyn std::error::Error>> {
cuneus::gst::init()?;
env_logger::init();
let (app, event_loop) = ShaderApp::new("voronoi", 800, 600);
app.run(event_loop, Voronoi::init)
}
struct Voronoi {
base: RenderKit,
compute_shader: ComputeShader,
current_params: ShaderParams}
impl ShaderManager for Voronoi {
fn init(core: &Core) -> Self {
let base = RenderKit::new(core);
let initial_params = ShaderParams {
scale: 24.0,
offset_value: -1.0,
cell_index: 0.0,
edge_width: 0.1,
highlight: 0.15,
_pad_m1: 0.0,
_pad_m2: 0.0,
_pad_m3: 0.0,
};
let config = ComputeShader::builder()
.with_entry_point("main")
.with_input_texture()
.with_custom_uniforms::<ShaderParams>()
.build();
let compute_shader = cuneus::compute_shader!(core, "shaders/voronoi.wgsl", config);
compute_shader.set_custom_params(initial_params, &core.queue);
Self {
base,
compute_shader,
current_params: initial_params}
}
fn update(&mut self, core: &Core) {
let current_time = self.base.controls.get_time(&self.base.start_time);
let delta = 1.0 / 60.0;
self.compute_shader
.set_time(current_time, delta, &core.queue);
self.base.update_current_texture(core, &core.queue);
if let Some(texture_manager) = self.base.get_current_texture_manager() {
self.compute_shader.update_input_texture(
&texture_manager.view,
&texture_manager.sampler,
&core.device,
);
}
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 _video_updated = if self.base.using_video_texture {
self.base.update_video_texture(core, &core.queue)
} else {
false
};
let _webcam_updated = if self.base.using_webcam_texture {
self.base.update_webcam_texture(core, &core.queue)
} else {
false
};
let mut params = self.current_params;
let mut changed = false;
let mut controls_request = self
.base
.controls
.get_ui_request(&self.base.start_time, &core.size, self.base.fps_tracker.fps());
let using_video_texture = self.base.using_video_texture;
let using_hdri_texture = self.base.using_hdri_texture;
let using_webcam_texture = self.base.using_webcam_texture;
let video_info = self.base.get_video_info();
let hdri_info = self.base.get_hdri_info();
let webcam_info = self.base.get_webcam_info();
let full_output = if self.base.key_handler.show_ui {
self.base.render_ui(core, |ctx| {
ctx.global_style_mut(|style| {
style.visuals.window_fill =
egui::Color32::from_rgba_premultiplied(0, 0, 0, 180);
});
egui::Window::new("Voronoi Settings")
.collapsible(true)
.default_size([300.0, 100.0])
.show(ctx, |ui| {
ui.collapsing("Media", |ui: &mut egui::Ui| {
cuneus::ShaderControls::render_media_panel(
ui,
&mut controls_request,
using_video_texture,
video_info,
using_hdri_texture,
hdri_info,
using_webcam_texture,
webcam_info,
);
});
ui.separator();
ui.collapsing("Pattern Settings", |ui| {
changed |= ui
.add(
egui::Slider::new(&mut params.scale, 1.0..=100.0)
.text("Cell Scale"),
)
.changed();
changed |= ui
.add(
egui::Slider::new(&mut params.offset_value, -1.0..=2.0)
.text("Pattern Offset"),
)
.changed();
});
ui.collapsing("Cell Settings", |ui| {
changed |= ui
.add(
egui::Slider::new(&mut params.cell_index, 0.0..=3.0)
.text("Cell Index"),
)
.changed();
});
ui.collapsing("Edge Settings", |ui| {
changed |= ui
.add(
egui::Slider::new(&mut params.edge_width, 0.0..=1.0)
.text("Edge Width"),
)
.changed();
changed |= ui
.add(
egui::Slider::new(&mut params.highlight, 0.0..=15.0)
.text("Edge Highlight"),
)
.changed();
});
ui.separator();
cuneus::ShaderControls::render_controls_widget(ui, &mut controls_request);
});
})
} else {
self.base.render_ui(core, |_ctx| {})
};
self.base.apply_media_requests(core, &controls_request);
if changed {
self.current_params = params;
self.compute_shader.set_custom_params(params, &core.queue);
}
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);
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 {
self.base.default_handle_input(core, event)
}
}