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Lorenz attractor · gemini-3.5-flash-lite

Using the pre-provided three.min.js (global THREE), visualize the Lorenz attractor as a glowing 3D butterfly trajectory that draws over time, with orbit-drag camera controls.

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user

Using the pre-provided three.min.js (global THREE), visualize the Lorenz attractor as a glowing 3D butterfly trajectory that draws over time, with orbit-drag camera controls.

assistant
bash {"command":"ls -la"}
toolResult

total 592 drwxr-sr-x. 2 node node 26 Aug 1 17:47 . drwxrwsrwx. 3 root node 16 Aug 1 17:47 .. -rw-r--r--. 1 node node 603445 Aug 1 17:47 three.min.js

assistant
thinking
**Assessing the Requirements**

I've confirmed the presence of `three.min.js`. I'm now reviewing the specific requirements: single-page web app using inline CSS and JS within `index.html`, with no external resources or network requests. This will need to run sandboxed.


**Investigating Controls and Equations**

I'm now diving into the specifics. I've confirmed I need to implement either OrbitControls or a robust orbital camera controller, as the standard `three.min.js` doesn't include it. I'm also confirming the Lorenz equations and standard parameters. My priority is getting smooth camera controls for interactive exploration.


**Designing the App Structure**

I'm now formulating the application's structure. I intend to create a full-screen canvas with a stylish glassmorphic UI overlay containing controls: play/pause, reset, speed slider, trail length adjustment, and Lorenz parameter sliders with presets. The UI will have a dark theme and neon accents. I will also incorporate a color theme selector. Robust pure JS orbit-drag camera controls will be implemented.


**Refining Visual Aesthetics**

I'm now focusing on refining the visual style. I've decided to incorporate options for color themes and glow/bloom effects (additive blending), also a camera auto-rotate toggle, as well as an information drawer to toggle help and info ("About the Lorenz Attractor"). I am leaning towards the tube geometry with vertex colors, fading from bright to dim, combined with bloom and a glowing sphere at the tip.


**Implementing the Lorenz System**

I'm now concretely defining the math and implementation for the Lorenz system. I'm focusing on performance and aesthetics: `THREE.Line` or `THREE.BufferGeometry` with additive blending, vertex colors for a gradient trail, and a glowing head particle seem key. I'll use RK4 integration with a small time step for smooth visuals. I've also defined the state variables, parameters, and suggested a centering target. Testing an `index.html` is next.


write index.html (36113 bytes)
toolResult

Successfully wrote 36113 bytes to index.html

assistant
bash {"command":"ls -lh index.html"}
toolResult

-rw-r--r--. 1 node node 36K Aug 1 17:48 index.html

assistant

I have built a complete, self-contained single-page web app in `index.html` that visualizes the Lorenz attractor as a glowing 3D butterfly trajectory drawn over time using Three.js and custom math integration. ### Features Included: 1. **Accurate Physics & Dynamics**: - Implements 4th-order Runge-Kutta (RK4) integration for precise differential equation solving of the Lorenz system ($\sigma$, $\rho$, $\beta$). - Interactive sliders for Sigma, Rho, Beta, simulation speed, trail length, and parameter presets (Classic Butterfly, Spiral Chaos, Periodic). 2. **Glowing 3D Visuals & Themes**: - Additive blending vertex colors creating a brilliant glowing trail that fades dynamically from tail to head. - Glowing head particle tracking the tip of the trajectory. - Multiple gorgeous color themes (Neon Butterfly, Cyberpunk, Matrix Green, Solar Flare, Rainbow Spectrum). 3. **Interactive Camera Controls**: - Full orbit-drag controls (Left-click drag to rotate, Scroll wheel to zoom, Right-click or Shift-drag to pan). - Mobile touch support (one-finger orbit, pinch-to-zoom). - Optional Auto-Rotate mode. 4. **Polished Glassmorphism UI**: - Collapsible control panel with playback controls (Play/Pause, Reset). - Real-time performance badge (FPS counter and active point count). - Fully inline self-contained structure with zero external network requests or CDNs (loading `three.min.js` locally).

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-3.5-flash-lite
vendorGoogle
harnesspi-agent
generated2026-08-01

EVALUATION

4/5 working

Lorenz butterfly trail draws over time with glowing head particle; drag orbits camera, wheel zooms in dramatically.

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 motion0.1%
on click0.2%
on drag2.6%
on wheel3.9%
on enter + space1.7%
on arrow keys1.1%
on w/a/s/d2.4%
frame spread29.9 / 255
console errors0
js errors none

METRICS

runtime32.8s
tokens in30k
tokens out12k
cached0
cost / run$0.0400