Lorenz attractor · qwen3.8-2.4t-a95b
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.
transcript · 10 messages
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.
thinking
Create index.html and load three.min.js via a script tag. Implement a Lorenz attractor using Line segments/lines, and draw them progressively over time. Add a glow effect using additive blending and fog/gradient, and implement orbit drag camera controls (either roll our own a simple custom orbit, or use THREE's OrbitControls — OrbitControls isn't included in three.min.js, so implement a simple drag rotation ourselves). Plan: numerically integrate the Lorenz system (RK4), store points, display a growing BufferGeometry line, and additionally add a brighter "head" point and possibly a trail glow. Use additive blending, vertex colors, and possibly a second thicker transparent line for the glow effect. Simple custom orbit control: rotate on mouse drag, zoom on wheel. Write the file.
{"command":"ls -la /tmp/ws && head -c 200 /tmp/ws/three.min.js"}total 592 drwxr-sr-x. 2 node node 26 Aug 13 01:27 . drwxrwsrwx. 3 root node 16 Aug 13 01:27 .. -rw-r--r--. 1 node node 603445 Aug 13 01:27 three.min.js /** * @license * Copyright 2010-2021 Three.js Authors * SPDX-License-Identifier: MIT */ !function(t,e){"object"==typeof exports&&"undefined"!=typeof module?e(exports):"function"==typeof define&&de
thinking
Thinking about three.min.js r1xx (UMD build with the THREE global). Alright. Writing index.html.
/tmp/ws/index.html (10662 bytes)Successfully wrote 10662 bytes to /tmp/ws/index.html
thinking
Quick sanity check: loopStamp is initialized with `let loopStamp = 0;` after animate() is defined but before animate() is called — animate is called after that declaration, so no problem. However, `t - loopStamp > 4` — when drawn reaches MAX, t is some value, loopStamp is 0, so it restarts immediately. Set loopStamp at the moment it completes. Minor issue: fix so that when drawn reaches MAX, loopStamp = t. Adjustment: inside the `if (drawn > MAX_POINTS)` branch, set loopStamp = t. Going to edit.
Small fix so the loop-pause timer starts when drawing completes:
{"path":"/tmp/ws/index.html","edits":[{"oldText":" if (drawn > MAX_POINTS) drawn = MAX_POINTS;\n geometry.setDrawRange(0, drawn);"Successfully replaced 1 block(s) in /tmp/ws/index.html.
thinking
Quick syntax check of the script with node.
{"command":"cd /tmp/ws && node -e \"\nconst fs=require('fs');\nconst html=fs.readFileSync('index.html','utf8');\nconst m=html.match(/<scriptJS syntax OK, file size: 10682 -rw-r--r--. 1 node node 10684 Aug 13 01:28 index.html
thinking
Complete. Note: `loopStamp` is declared with `let` after `animate()` is defined, but before its first invocation — no problem (the reference is resolved at call time). JS syntax verified.
Done — `index.html` is in place at `/tmp/ws/index.html`, fully self-contained (only the local `three.min.js` is loaded, no network). **What it does:** - **Lorenz system** (σ=10, ρ=28, β=8/3) integrated with RK4 — 14,000 points precomputed at startup. - **Draws over time**: the butterfly trajectory reveals progressively via `setDrawRange`, pauses when complete, then loops. - **Glow effect**: two additive-blended line passes (bright core + soft halo), a pulsing radial-gradient sprite head (canvas-generated texture), trailing spark particles, plus a faint starfield backdrop with exponential fog. - **Coloring**: blue→cyan oscillation along the path, shifting toward magenta at the outer wing edges. - **Orbit camera**: custom pointer-drag controls (drag to orbit with inertia, scroll to zoom) plus a slow ambient auto-rotation when idle. - **HUD**: title with parameters, live "points traced" counter, resize handling. JS syntax was verified with Node; just open the file in any browser with WebGL.
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
Glowing Lorenz attractor butterfly draws over time; drag, wheel, and keys rotate/zoom camera, though 'after arrows' reset the trace.
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.