Double pendulum · claude-opus-4.8
Simulate a chaotic double pendulum on a canvas using the correct equations of motion, drawing the arms and a colorful fading trail of the tip.
transcript · 4 messages
Simulate a chaotic double pendulum on a canvas using the correct equations of motion, drawing the arms and a colorful fading trail of the tip.
thinking
I'm creating a self-contained HTML file that simulates a double pendulum system.
index.html (6997 bytes)Successfully wrote 6997 bytes to index.html
Created `index.html` — a self-contained chaotic double pendulum simulation. **Physics:** Uses the correct double-pendulum equations of motion (full nonlinear angular accelerations with coupled masses/lengths), integrated with **RK4** and 6 substeps per frame for numerical stability. **Visuals:** - Two rigid arms drawn from a fixed pivot, with bobs sized by their mass sliders. - A colorful **fading trail** of the tip that cycles hue over time and fades toward the tail via alpha, painted over a semi-transparent background wash for a motion-blur glow. **Controls:** live sliders for gravity, both masses, both lengths, damping, and trail length; a randomize/reset button; and click-to-reposition on the canvas. It's DPR-aware and resizes with the window.
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
Double pendulum swings realistically with a colorful fading rainbow trail, controls visible but keyboard/click inputs seem to just reset via click canvas.
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.