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Flow-field particles · gemini-3.7-flash

Using the pre-provided p5.min.js (global p5, instance or global mode), create a full-screen flow-field particle animation: thousands of particles advected by Perlin-noise vectors, leaving fading trails, with colors shifting over time.

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transcript · 18 messages
user

Using the pre-provided p5.min.js (global p5, instance or global mode), create a full-screen flow-field particle animation: thousands of particles advected by Perlin-noise vectors, leaving fading trails, with colors shifting over time.

assistant
thinking
→ bash {"command":"ls -la"}
toolResult
 
total 1024
drwx------ 2 node node    4096 Aug 28 02:29 .
drwxrwxrwt 4 root root    4096 Aug 28 02:29 ..
-rw-r--r-- 1 node node    1532 Aug 28 02:29 events.jsonl
-rw-r--r-- 1 node node 1034532 Aug 28 02:29 p5.min.js

assistant
 
thinking
**Confirming Setup**

I’m verifying the core setup. The p5.min.js library is confirmed locally, and I'm structuring the index.html to embed CSS and JS directly, with no external CDN calls, as per the requirements.

**Designing Animation**

I'm now focusing on the core visual mechanics. I'm planning for thousands of particles driven by multidimensional Perlin noise, complete with fading trails and dynamic color shifts. The goal is a performant, interactive, and visually stunning experience.

**Refining Dynamics**

I’m exploring advection with damping for smoother particle movement, and I'm experimenting with sub-stepping to ensure perfectly continuous trails. My focus is also on creating rich, dynamic color palettes that shift over time, and I’m considering options for interactive mouse and touch controls.

**Implementing Controls**

I’m detailing the interactive controls now. This involves setting up a collapsible UI with presets like "Aurora" and "Quantum Foam," alongside granular adjustments for particle behavior, color dynamics, and force field generation. I'm also planning for performance monitoring and screenshot capabilities.

**Developing Features**

I'm integrating several key features. This includes adding sound synthesis options via the Web Audio API, ensuring smooth canvas resizing, and implementing intuitive keyboard shortcuts for pause, clear, randomize, and more.

**Optimizing Performance**

My current focus is on achieving 60fps with a high particle count. I'm exploring direct 2D canvas operations and optimized drawing methods, weighing pre-computation of the noise field against direct sampling for maximum efficiency.


→ write index.html (49579 bytes)
toolResult
 
Successfully wrote 49579 bytes to index.html
assistant
 
thinking
→ bash {"command":"ls -lh index.html"}
toolResult
 
-rw-r--r-- 1 node node 49K Aug 28 02:31 index.html

assistant
 
thinking
→ bash {"command":"wc -l index.html"}
toolResult
 
1549 index.html

assistant
 
thinking
→ read {"limit":100,"offset":500,"path":"index.html"}
toolResult
 

        <div class="control-group">
          <div class="control-label">
            <span>Color Shift Speed</span>
            <span class="control-val" id="val-colorshift">0.5</span>
          </div>
          <input type="range" id="slider-colorshift" min="0.0" max="2.0" step="0.05" value="0.5">
        </div>

        <div class="control-group">
          <div class="control-label"><span>Blend Mode</span></div>
          <select id="select-blend" class="select-input">
            <option value="source-over">Normal Smooth</option>
            <option value="lighter" selected>Additive Glow (Neon)</option>
            <option value="screen">Soft Screen Glow</option>
          </select>
        </div>

        <div class="control-group">
          <div class="control-label"><span>Field Flow Pattern</span></div>
          <select id="select-pattern" class="select-input">
            <option value="perlin">Standard Perlin Stream</option>
            <option value="curl">Curl / Turbulence</option>
            <option value="vortex">Vortex Core Spiral</option>
            <option value="harmonic">Harmonic Waveflow</option>
          </select>
        </div>
      </div>

      <!-- Interaction -->
      <div class="control-group">
        <div class="section-title">Interactivity</div>
        <div class="control-group">
          <div class="control-label"><span>Mouse Force Mode</span></div>
          <select id="select-mouse" class="select-input">
            <option value="attract">Gravity Attract</option>
            <option value="repel">Force Repel</option>
            <option value="vortex" selected>Vortex Whirlpool</option>
            <option value="none">Disabled</option>
          </select>
        </div>
      </div>

      <!-- Action Buttons -->
      <button class="btn-full" id="btn-randomize">
        <span>⚡ Randomize Parameters</span>
      </button>
    </div>

    <!-- Bottom Status Info -->
    <div class="glass-panel bottom-bar interactive">
      <div class="stats">
        <div class="stat-item">FPS: <span id="fps-counter">60</span></div>
        <div class="stat-item">Particles: <span id="particle-counter">6,500</span></div>
        <div class="stat-item">Time: <span id="time-counter">0.00</span></div>
      </div>
      <div class="shortcuts-hint">
        <span><span class="key-badge">Space</span> Pause</span>
        <span><span class="key-badge">R</span> Random</span>
        <span><span class="key-badge">C</span> Clear</span>
        <span><span class="key-badge">S</span> Save</span>
        <span><span class="key-badge">H</span> Hide UI</span>
      </div>
    </div>
  </div>

  <div id="notification">Preset Applied</div>

  <!-- Load local p5.min.js -->
  <script src="p5.min.js"></script>

  <script>
    /* =========================================================
       FLOW FIELD SIMULATION ENGINE
       ========================================================= */

    // Color Palettes (RGB Stops for rich multi-hue dynamic interpolation)
    const PALETTES = {
      aurora: [
        { r: 16, g: 255, b: 180 },   // Neon Teal
        { r: 0, g: 195, b: 255 },    // Cyan
        { r: 130, g: 80, b: 255 },   // Violet
        { r: 255, g: 70, b: 160 },   // Magenta
        { r: 40, g: 255, b: 120 }    // Bright Green
      ],
      cyberpunk: [
        { r: 255, g: 0, b: 110 },    // Hot Pink
        { r: 0, g: 245, b: 255 },    // Neon Cyan
        { r: 255, g: 220, b: 0 },    // Bright Yellow
        { r: 160, g: 30, b: 255 },   // Electric Purple
        { r: 255, g: 60, b: 0 }      // Orange Red
      ],
      solar: [
        { r: 255, g: 50, b: 0 },     // Ember Red
        { r: 255, g: 140, b: 0 },    // Molten Orange
        { r: 255, g: 220, b: 50 },   // Solar Gold
        { r: 255, g: 255, b: 220 },  // White Hot
        { r: 180, g: 20, b: 40 }     // Crimson
      ],
      oceanic: [

[951 more lines in file. Use offset=600 to continue.]
assistant
 
thinking
→ read {"limit":100,"path":"index.html","offset":450}
toolResult
 
        <div class="control-group">
          <div class="control-label">
            <span>Particle Speed</span>
            <span class="control-val" id="val-speed">3.2</span>
          </div>
          <input type="range" id="slider-speed" min="0.5" max="8.0" step="0.1" value="3.2">
        </div>

        <div class="control-group">
          <div class="control-label">
            <span>Agility / Responsiveness</span>
            <span class="control-val" id="val-force">0.18</span>
          </div>
          <input type="range" id="slider-force" min="0.02" max="0.6" step="0.02" value="0.18">
        </div>
      </div>

      <!-- Visuals & Aesthetics -->
      <div class="control-group">
        <div class="section-title">Aesthetics & Trails</div>

        <div class="control-group">
          <div class="control-label"><span>Color Palette</span></div>
          <select id="select-palette" class="select-input">
            <option value="aurora">Aurora Borealis</option>
            <option value="cyberpunk">Cyberpunk Neon</option>
            <option value="solar">Solar Flare / Magma</option>
            <option value="oceanic">Deep Oceanic Abyss</option>
            <option value="cosmic">Cosmic Nebula</option>
            <option value="prism">Opal Prism Spectrum</option>
            <option value="emerald">Jade Matrix</option>
            <option value="monochrome">Ghost Velvet Ink</option>
          </select>
        </div>

        <div class="control-group">
          <div class="control-label">
            <span>Trail Persistence (Fade)</span>
            <span class="control-val" id="val-fade">16</span>
          </div>
          <input type="range" id="slider-fade" min="1" max="45" step="1" value="16">
        </div>

        <div class="control-group">
          <div class="control-label">
            <span>Stroke Thickness</span>
            <span class="control-val" id="val-stroke">1.4</span>
          </div>
          <input type="range" id="slider-stroke" min="0.5" max="4.0" step="0.1" value="1.4">
        </div>

        <div class="control-group">
          <div class="control-label">
            <span>Color Shift Speed</span>
            <span class="control-val" id="val-colorshift">0.5</span>
          </div>
          <input type="range" id="slider-colorshift" min="0.0" max="2.0" step="0.05" value="0.5">
        </div>

        <div class="control-group">
          <div class="control-label"><span>Blend Mode</span></div>
          <select id="select-blend" class="select-input">
            <option value="source-over">Normal Smooth</option>
            <option value="lighter" selected>Additive Glow (Neon)</option>
            <option value="screen">Soft Screen Glow</option>
          </select>
        </div>

        <div class="control-group">
          <div class="control-label"><span>Field Flow Pattern</span></div>
          <select id="select-pattern" class="select-input">
            <option value="perlin">Standard Perlin Stream</option>
            <option value="curl">Curl / Turbulence</option>
            <option value="vortex">Vortex Core Spiral</option>
            <option value="harmonic">Harmonic Waveflow</option>
          </select>
        </div>
      </div>

      <!-- Interaction -->
      <div class="control-group">
        <div class="section-title">Interactivity</div>
        <div class="control-group">
          <div class="control-label"><span>Mouse Force Mode</span></div>
          <select id="select-mouse" class="select-input">
            <option value="attract">Gravity Attract</option>
            <option value="repel">Force Repel</option>
            <option value="vortex" selected>Vortex Whirlpool</option>
            <option value="none">Disabled</option>
          </select>
        </div>
      </div>

      <!-- Action Buttons -->
      <button class="btn-full" id="btn-randomize">
        <span>⚡ Randomize Parameters</span>
      </button>
    </div>

    <!-- Bottom Status Info -->

[1001 more lines in file. Use offset=550 to continue.]
assistant
 
thinking
→ read {"offset":550,"limit":100,"path":"index.html"}
toolResult
 
    <div class="glass-panel bottom-bar interactive">
      <div class="stats">
        <div class="stat-item">FPS: <span id="fps-counter">60</span></div>
        <div class="stat-item">Particles: <span id="particle-counter">6,500</span></div>
        <div class="stat-item">Time: <span id="time-counter">0.00</span></div>
      </div>
      <div class="shortcuts-hint">
        <span><span class="key-badge">Space</span> Pause</span>
        <span><span class="key-badge">R</span> Random</span>
        <span><span class="key-badge">C</span> Clear</span>
        <span><span class="key-badge">S</span> Save</span>
        <span><span class="key-badge">H</span> Hide UI</span>
      </div>
    </div>
  </div>

  <div id="notification">Preset Applied</div>

  <!-- Load local p5.min.js -->
  <script src="p5.min.js"></script>

  <script>
    /* =========================================================
       FLOW FIELD SIMULATION ENGINE
       ========================================================= */

    // Color Palettes (RGB Stops for rich multi-hue dynamic interpolation)
    const PALETTES = {
      aurora: [
        { r: 16, g: 255, b: 180 },   // Neon Teal
        { r: 0, g: 195, b: 255 },    // Cyan
        { r: 130, g: 80, b: 255 },   // Violet
        { r: 255, g: 70, b: 160 },   // Magenta
        { r: 40, g: 255, b: 120 }    // Bright Green
      ],
      cyberpunk: [
        { r: 255, g: 0, b: 110 },    // Hot Pink
        { r: 0, g: 245, b: 255 },    // Neon Cyan
        { r: 255, g: 220, b: 0 },    // Bright Yellow
        { r: 160, g: 30, b: 255 },   // Electric Purple
        { r: 255, g: 60, b: 0 }      // Orange Red
      ],
      solar: [
        { r: 255, g: 50, b: 0 },     // Ember Red
        { r: 255, g: 140, b: 0 },    // Molten Orange
        { r: 255, g: 220, b: 50 },   // Solar Gold
        { r: 255, g: 255, b: 220 },  // White Hot
        { r: 180, g: 20, b: 40 }     // Crimson
      ],
      oceanic: [
        { r: 0, g: 60, b: 140 },     // Deep Navy
        { r: 0, g: 180, b: 216 },    // Mediterranean Blue
        { r: 72, g: 202, b: 228 },   // Aquamarine
        { r: 144, g: 224, b: 239 },  // Light Sea Foam
        { r: 0, g: 255, b: 200 }     // Bioluminescent Teal
      ],
      cosmic: [
        { r: 123, g: 44, b: 191 },   // Deep Nebula Purple
        { r: 199, g: 125, b: 255 },  // Lilac
        { r: 247, g: 37, b: 133 },   // Stellar Fuchsia
        { r: 76, g: 201, b: 240 },   // Star Blue
        { r: 255, g: 255, b: 255 }   // Starlight White
      ],
      prism: [
        { r: 255, g: 0, b: 0 },      // Red
        { r: 255, g: 165, b: 0 },    // Orange
        { r: 255, g: 255, b: 0 },    // Yellow
        { r: 0, g: 255, b: 0 },      // Green
        { r: 0, g: 150, b: 255 },    // Blue
        { r: 180, g: 0, b: 255 }     // Violet
      ],
      emerald: [
        { r: 5, g: 150, b: 105 },    // Emerald
        { r: 16, g: 185, b: 129 },   // Sea Green
        { r: 52, g: 211, b: 153 },   // Mint
        { r: 110, g: 231, b: 183 },  // Pale Sage
        { r: 6, g: 78, b: 59 }       // Deep Forest
      ],
      monochrome: [
        { r: 240, g: 245, b: 255 },  // Frost Silver
        { r: 180, g: 190, b: 210 },  // Cool Grey
        { r: 120, g: 130, b: 150 },  // Slate
        { r: 210, g: 220, b: 240 },  // Pearl
        { r: 80, g: 90, b: 110 }     // Graphite
      ]
    };

    // Simulation Presets
    const PRESETS = {
      aurora: {
        name: "Aurora",
        palette: "aurora",
        particleCount: 7500,
        noiseScale: 0.0035,
        timeStep: 0.0016,
        maxSpeed: 3.4,
        maxForce: 0.2,
        fadeAlpha: 14,
        strokeWidth: 1.3,
        colorShiftSpeed: 0.4,

[901 more lines in file. Use offset=650 to continue.]
assistant
 
thinking
→ bash {"command":"sed -n '540,580p' index.html"}
toolResult
 
        </div>
      </div>

      <!-- Action Buttons -->
      <button class="btn-full" id="btn-randomize">
        <span>⚡ Randomize Parameters</span>
      </button>
    </div>

    <!-- Bottom Status Info -->
    <div class="glass-panel bottom-bar interactive">
      <div class="stats">
        <div class="stat-item">FPS: <span id="fps-counter">60</span></div>
        <div class="stat-item">Particles: <span id="particle-counter">6,500</span></div>
        <div class="stat-item">Time: <span id="time-counter">0.00</span></div>
      </div>
      <div class="shortcuts-hint">
        <span><span class="key-badge">Space</span> Pause</span>
        <span><span class="key-badge">R</span> Random</span>
        <span><span class="key-badge">C</span> Clear</span>
        <span><span class="key-badge">S</span> Save</span>
        <span><span class="key-badge">H</span> Hide UI</span>
      </div>
    </div>
  </div>

  <div id="notification">Preset Applied</div>

  <!-- Load local p5.min.js -->
  <script src="p5.min.js"></script>

  <script>
    /* =========================================================
       FLOW FIELD SIMULATION ENGINE
       ========================================================= */

    // Color Palettes (RGB Stops for rich multi-hue dynamic interpolation)
    const PALETTES = {
      aurora: [
        { r: 16, g: 255, b: 180 },   // Neon Teal
        { r: 0, g: 195, b: 255 },    // Cyan

assistant
 
 
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
 
modelgemini-3.7-flash
 
vendorGoogle
 
harnesspi-agent
 
generated2026-08-28
 
EVALUATION
 
★★★★★ 1/5 broken
 
Only a control panel UI renders with a fully black canvas; no particles or flow-field animation ever appear.
 
off-prompt
 
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.
 
idle motion0.0%
 
on click0.0%
on drag0.0%
on wheel0.0%
on enter + space0.0%
on arrow keys0.0%
on w/a/s/d0.0%
 
frame spread12.9 / 255
 
console errors1
 
js errors none
 
METRICS
 
runtime157.3s
 
tokens in122k
 
tokens out18k
 
cached64k
 
cost / run$0.0579