cuneus 0.5.0

A WGPU-based shader development tool
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186

use cuneus::compute::*;
use cuneus::prelude::*;

cuneus::uniform_params! {
    struct PhysarumParams {
        sensor_angle: f32, sensor_dist: f32, drag: f32, move_speed: f32,
        decay_rate: f32, diffuse_rate: f32, deposit_amt: f32, random_jitter: f32,
        rule_seed: f32, mutation_scale: f32, force_scale: f32, sensor_gain: f32,
        species_attract: f32, species_repel: f32, strafe_power: f32, agent_count_scale: f32,
        glow_intensity: f32, color_shift: f32, specular_strength: f32, gamma: f32,
        attractor_count: f32, attractor_speed: f32, attractor_radius: f32, attractor_strength: f32,
        color_spread: f32, saturation: f32, palette_mix: f32, blur_samples: f32,
        color0_r: f32, color0_g: f32, color0_b: f32,
        color1_r: f32, color1_g: f32, color1_b: f32,
        color2_r: f32, color2_g: f32, color2_b: f32,
        substep: f32, total_samples: f32, wind_strength: f32, turing_scale: f32,
        _pad1: f32, fluid_blend: f32, _pad3: f32,
    }
}

struct PhysarumShader {
    base: RenderKit,
    compute_shader: ComputeShader,
    current_params: PhysarumParams,
}

impl ShaderManager for PhysarumShader {
    fn init(core: &Core) -> Self {
        let initial_params = PhysarumParams {
            sensor_angle: 1.50, sensor_dist: 40.0, drag: 0.20, move_speed: 4.95,
            decay_rate: 0.999, diffuse_rate: 0.10, deposit_amt: 30.0, random_jitter: 0.500,
            rule_seed: 1.0, mutation_scale: 0.30, force_scale: 0.80, sensor_gain: 5.0,
            species_attract: 1.00, species_repel: 0.92, strafe_power: 0.15, agent_count_scale: 1.00,
            glow_intensity: 0.00, color_shift: -0.02, specular_strength: 0.25, gamma: 0.50,
            attractor_count: 3.0, attractor_speed: 0.30, attractor_radius: 250.0, attractor_strength: 0.15,
            color_spread: 0.30, saturation: 1.58, palette_mix: 0.57, blur_samples: 0.99,
            color0_r: 1.0, color0_g: 0.2, color0_b: 0.2,
            color1_r: 0.2, color1_g: 0.8, color1_b: 0.3,
            color2_r: 0.2, color2_g: 0.4, color2_b: 1.0,
            substep: 1.0, total_samples: 1.0, wind_strength: 0.8, turing_scale: 0.0,
            _pad1: 0.0, fluid_blend: 0.0, _pad3: 0.0,
        };

        let base = RenderKit::new(core);

        let passes = vec![
            PassDescription::new("agent_update", &["agent_update", "turing_resolve"]).with_resolution(1024, 1024),
            PassDescription::new("process_trails", &["process_trails"]),
            PassDescription::new("diffuse_h", &["process_trails"]),
            PassDescription::new("diffuse_v", &["process_trails", "diffuse_h"]),
            PassDescription::new("inhibitor_down", &["diffuse_v"]).with_resolution_scale(0.125),
            PassDescription::new("turing_resolve", &["process_trails", "diffuse_v", "inhibitor_down"]),
            PassDescription::new("main_image", &["process_trails", "turing_resolve", "inhibitor_down"]),
        ];

        let config = ComputeShader::builder()
            .with_multi_pass(&passes)
            .with_custom_uniforms::<PhysarumParams>()
            .with_atomic_buffer(4)
            .with_label("Physarum Simulation")
            .build();

        let compute_shader = cuneus::compute_shader!(core, "shaders/physarum.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);
        self.compute_shader.set_time(current_time, 1.0 / 60.0, &core.queue);
        self.compute_shader.handle_export(core, &mut self.base);
    }

    fn resize(&mut self, core: &Core) {
        self.base.default_resize(core, &mut self.compute_shader);
    }

    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("Physarum Controls")
                    .collapsible(true).resizable(true).default_width(320.0)
                    .show(ctx, |ui| {
                        egui::CollapsingHeader::new("Behavior Rule").default_open(false).show(ui, |ui| {
                            changed |= ui.add(egui::Slider::new(&mut params.rule_seed, 0.0..=100.0).text("Rule Seed")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.mutation_scale, 0.0..=1.0).text("Species Diversity")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.force_scale, 0.0..=3.0).text("Force Scale")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.sensor_gain, 0.5..=30.0).text("Sensor Gain")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.strafe_power, 0.0..=2.0).text("Strafe Power")).changed();
                        });

                        egui::CollapsingHeader::new("Agent Physics").default_open(false).show(ui, |ui| {
                            changed |= ui.add(egui::Slider::new(&mut params.move_speed, 0.1..=5.0).text("Speed")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.drag, 0.0..=0.99).text("Momentum")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.wind_strength, 0.0..=3.0).text("Slipstream Wind")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.fluid_blend, 0.0..=2.0).text("Bubble vs Vein Bias")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.sensor_dist, 1.0..=40.0).text("Sensor Distance")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.sensor_angle, 0.05..=1.5).text("Sensor Angle")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.random_jitter, 0.0..=0.5).text("Random Jitter")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.agent_count_scale, 0.05..=1.0).text("Agent Density")).changed();
                        });

                        egui::CollapsingHeader::new("Trail Environment").default_open(false).show(ui, |ui| {
                            changed |= ui.add(egui::Slider::new(&mut params.deposit_amt, 1.0..=30.0).text("Deposit Amount")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.decay_rate, 0.9..=0.999).text("Decay Rate")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.diffuse_rate, 0.0..=1.0).text("Diffusion Rate")).changed();
                        });

                        egui::CollapsingHeader::new("Species Interaction").default_open(false).show(ui, |ui| {
                            changed |= ui.add(egui::Slider::new(&mut params.species_attract, 0.0..=1.0).text("Cross-Attraction")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.species_repel, 0.0..=1.0).text("Cross-Repulsion")).changed();
                        });

                        egui::CollapsingHeader::new("Attractors").default_open(false).show(ui, |ui| {
                            changed |= ui.add(egui::Slider::new(&mut params.attractor_count, 0.0..=8.0).step_by(1.0).text("Count")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.attractor_speed, 0.0..=2.0).text("Orbit Speed")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.attractor_radius, 50.0..=500.0).text("Radius")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.attractor_strength, 0.0..=1.0).text("Strength")).changed();
                        });

                        egui::CollapsingHeader::new("Rendering").default_open(false).show(ui, |ui| {
                            changed |= ui.add(egui::Slider::new(&mut params.blur_samples, 0.0..=1.0).text("Feedback Fade")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.glow_intensity, 0.0..=2.0).text("Glow")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.specular_strength, 0.0..=1.5).text("Specular")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.gamma, 0.1..=2.2).text("Gamma")).changed();
                        });

                        egui::CollapsingHeader::new("Colors").default_open(false).show(ui, |ui| {
                            changed |= ui.add(egui::Slider::new(&mut params.palette_mix, 0.0..=1.0).text("Palette Mix")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.color_shift, -0.5..=0.5).text("Color Shift")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.color_spread, 0.0..=1.0).text("Species Hue Spread")).changed();
                            changed |= ui.add(egui::Slider::new(&mut params.saturation, 0.0..=2.5).text("Saturation")).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| {})
        };

        if controls_request.should_clear_buffers { self.compute_shader.current_frame = 0; }
        if !self.base.export_manager.is_exporting() { 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.apply_control_request(controls_request);
        self.base.export_manager.apply_ui_request(export_request);

        if should_start_export { self.base.export_manager.start_export(); }
        if changed {
            self.current_params = params;
            self.compute_shader.set_custom_params(params, &core.queue);
        }

        self.base.end_frame(core, frame, full_output);
        Ok(())
    }

    fn handle_input(&mut self, core: &Core, event: &WindowEvent) -> bool {
        self.base.default_handle_input(core, event)
    }
}

fn main() -> Result<(), Box<dyn std::error::Error>> {
    env_logger::init();
    let (app, event_loop) = ShaderApp::new("Physarum Engine", 1280, 720);
    app.run(event_loop, PhysarumShader::init)
}