Boids flocking · qwen3.5-35b-a3b
Create a full-screen flocking simulation of boids using separation, alignment, and cohesion, drawn as oriented triangles that steer smoothly and flee from the mouse cursor.
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Create a full-screen flocking simulation of boids using separation, alignment, and cohesion, drawn as oriented triangles that steer smoothly and flee from the mouse cursor.
thinking
The user wants me to create a full-screen flocking simulation with boids behavior. I need to create a single HTML file with: - CSS in a `<style>` tag - JavaScript in a `<script>` tag - No external resources - everything must be self-contained - Boids with three behaviors: separation, alignment, and cohesion - Boids drawn as oriented triangles - Smooth steering - Boids flee from the mouse cursor This is a classic boids simulation. I'll implement it with: 1. A Boid class with position, velocity, acceleration 2. Three steering behaviors (separation, alignment, cohesion) 3. A flee behavior from mouse 4. Canvas-based rendering with oriented triangles 5. Smooth animation using requestAnimationFrame Let me create this comprehensive simulation.
/tmp/ws/index.html (13765 bytes)Successfully wrote 13765 bytes to /tmp/ws/index.html
thinking
I've created a full-screen boids flocking simulation in a single HTML file. The simulation includes: 1. **Three steering behaviors:** - **Separation**: Boids steer away from nearby neighbors to avoid crowding - **Alignment**: Boids steer towards the average heading of nearby neighbors - **Cohesion**: Boids steer towards the average position of nearby neighbors 2. **Mouse interaction**: Boids flee from the mouse cursor when it's within a certain radius 3. **Visual features:** - Oriented triangles that rotate based on velocity direction - Colorful hsl-based coloring with some variation - Glow/shadow effect for visual appeal - Trail effect using semi-transparent background clear - Smooth animation with requestAnimationFrame 4. **Technical features:** - Full-screen canvas that resizes with the window - Edge wrapping so boids continue around the screen - Speed limiting and force limiting for realistic steering - Configurable parameters at the top of the script The file is self-contained with all CSS in a `<style>` tag and all JavaScript in a `<script>` tag. No external resources or network requests are used.
I've created a full-screen boids flocking simulation in `index.html`. The simulation features: **Three Core Steering Behaviors:** - **Separation** (weight: 2.5) - Boids steer away from nearby neighbors to avoid crowding - **Alignment** (weight: 1.0) - Boids match the average heading of nearby neighbors - **Cohesion** (weight: 1.0) - Boids steer toward the average position of nearby neighbors **Visual Features:** - Oriented triangles that rotate based on velocity direction - Colorful boids with hsl-based coloring (cyan-purple range) - Glow effect on each boid - Smooth trail effect from the fading background clear - 150 boids that wrap around screen edges **Interactive:** - Move mouse to scatter the flock (boids flee within 150px radius) - Touch support for mobile devices - Responsive canvas that adapts to window size Open `index.html` in a browser to see the simulation in action!
TAKE IT TO CODE
A single self-contained HTML file — copy it and open in any browser, or reuse the prompt with your own pi-agent run.
RUN
EVALUATION
Boid flocks of glowing oriented triangles swim smoothly, clustering and reacting/scattering near the cursor on click and drag.
Vision grade · anthropic/claude-sonnet-5
MEASUREMENTS
Raw readings from the capture, not a verdict — the grade above is the only judgement. Percentages are how much of the screen changed; the measure under-reports sparse motion on a dark background.