Boids flocking · nemotron-3-ultra-550b-a55b
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.
transcript · 12 messages
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 a full-screen flocking simulation (boids) with: 1. Separation, alignment, and cohesion behaviors 2. Boids drawn as oriented triangles 3. Smooth steering 4. Fleeing from mouse cursor 5. Single self-contained index.html file with inline CSS and JS Let me create this simulation.
/workspace/index.html (26893 bytes)Successfully wrote 26893 bytes to /workspace/index.html
thinking
The file has been created successfully. Let me verify it works by checking the file exists and its size.
{"command":"ls -la /workspace/index.html"}-rw-r--r-- 1 node node 26893 Jul 22 16:47 /workspace/index.html
thinking
The file has been created successfully. Let me verify the content is correct by checking a portion of it.
{"command":"head -50 /workspace/index.html"}<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Boids Flocking Simulation</title> <style> * { margin: 0; padding: 0; box-sizing: border-box; } body { overflow: hidden; background: #0a0a12; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; } canvas { display: block; } .ui { position: fixed; top: 20px; left: 20px; color: rgba(255, 255, 255, 0.7); pointer-events: none; z-index: 10; font-size: 14px; line-height: 1.6; } .ui h1 { font-size: 18px; font-weight: 600; color: #fff; margin-bottom: 8px; } .ui .stat { opacity: 0.6; } .controls { position: fixed; bottom: 20px; left: 20px; display: flex; flex-direction: column; gap: 12px; z-index: 10; } .control-group { display: flex;
thinking
The file has been created successfully. Let me verify the rest of the file and confirm it's complete.
{"command":"tail -50 /workspace/index.html"}['sepWeight', 'separationWeight'], ['aliWeight', 'alignmentWeight'], ['cohWeight', 'cohesionWeight'], ['maxSpeed', 'maxSpeed'], ['neighborRad', 'neighborRadius'], ['sepRad', 'separationRadius'], ['fleeForce', 'fleeForce'], ['fleeRad', 'fleeRadius'], ['boidCountInput', 'boidCount'], ['trailLength', 'trailLength'] ]; sliders.forEach(([id, key]) => { const el = document.getElementById(id); el.addEventListener('input', (e) => { const val = parseFloat(e.target.value); config[key] = val; document.getElementById(id.replace('Input', '') + 'Val').textContent = val; if (key === 'boidCount') { initBoids(); } updatePresetButtons(); }); }); function updatePresetButtons() { const current = getCurrentPreset(); document.querySelectorAll('.preset-btn').forEach(btn => { btn.classList.toggle('active', btn.dataset.preset === current); }); } document.querySelectorAll('.preset-btn').forEach(btn => { btn.addEventListener('click', () => { applyPreset(btn.dataset.preset); }); }); document.getElementById('resetBtn').addEventListener('click', () => { initBoids(); }); // Initialize resize(); initBoids(); updateUI(); requestAnimationFrame(animate); </script> </body> </html>
thinking
The file looks complete. Let me verify it's valid HTML by checking if there are any syntax issues.
{"command":"head -5 /workspace/index.html && echo \"...\" && tail -5 /workspace/index.html"}<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> ... updateUI(); requestAnimationFrame(animate); </script> </body> </html>
thinking
The file is complete and well-structured. Let me provide a summary to the user.
Created `/workspace/index.html` — a complete, self-contained boids flocking simulation. Open it in a browser to run. **Features implemented:** - **Full-screen canvas** with responsive resize handling - **Three core flocking behaviors** with adjustable weights: - **Separation** — avoid crowding neighbors - **Alignment** — match neighbors' velocity - **Cohesion** — steer toward flock center - **Oriented triangle boids** with velocity-aligned orientation and subtle glow - **Smooth steering** via acceleration/velocity integration with configurable max force - **Mouse flee behavior** — boids flee from cursor within configurable radius - **Configurable trails** (0–30 frames) with fade - **Wrapping boundaries** (toroidal world) - **Presets**: Default, Tight Flock, Loose Swarm, Chaos, Fish School - **Real-time sliders** for all parameters with live value display - **FPS counter** and boid count display Open `/workspace/index.html` in a browser to run.
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
Boids flock and flee mouse cursor with visible red radius; sliders and presets work, though there are JS text errors.
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.
- Cannot set properties of null (setting 'textContent')
- Cannot set properties of null (setting 'textContent')
- Cannot set properties of null (setting 'textContent')
- Cannot set properties of null (setting 'textContent')