3D Chladni Render

Workflow

1. Resolve the requested workspace, output path, duration, dimensions, and visual mode.
2. Use cosmic when the user does not choose a mode.
3. Pass an audio file with --audio when the user wants sound-reactive motion. Prefer sand or dcosmic for audio-driven output.
4. Resolve the installed skill directory and run scripts/render_3d_chladni.py.
5. Wait for the script to print VALIDATION=PASS and OUTPUT_VIDEO=<absolute path>.
6. Return the absolute output path and the render settings.

Quick Start

python3 scripts/render_3d_chladni.py \
  --workspace "$(pwd)" \
  --output "$(pwd)/out/3d-chladni-cosmic.mp4"

Installed Skill Resolution

Use the installed skill copy, not a source checkout of this skill collection:

skill_dir=""
for base in "${AGENTS_HOME:-$HOME/.agents}" "${CLAUDE_HOME:-$HOME/.claude}" "${CODEX_HOME:-$HOME/.codex}"; do
  if [ -d "$base/skills/3d-chladni-render" ]; then
    skill_dir="$base/skills/3d-chladni-render"
    break
  fi
done
[ -n "$skill_dir" ] || { echo "3d-chladni-render skill not found under ~/.agents, ~/.claude, or ~/.codex"; exit 1; }

python3 "$skill_dir/scripts/render_3d_chladni.py" \
  --workspace "$(pwd)" \
  --output "$(pwd)/out/3d-chladni-cosmic.mp4"

Modes

--style	Visual mode	Best use
sand	Dynamic Sand	Audio-reactive inertial sand motion
msand	Modal Sand	Stable sculptural Chladni nodes
cosmic	Cosmic Web	Calm rotating three-dimensional particle web
dcosmic	Dynamic Cosmic	Audio-reactive cosmic deformation

Audio-Driven Render

Use an absolute path for the user's audio file:

python3 "$skill_dir/scripts/render_3d_chladni.py" \
  --workspace "$(pwd)" \
  --style dcosmic \
  --audio "/absolute/path/to/music.wav" \
  --seconds 12 \
  --output "$(pwd)/out/audio-chladni.mp4"

The source exporter analyzes the supplied audio frame by frame and muxes it into the video. Do not describe browser microphone or desktop system-audio capture as part of this offline export path.

Transparent Output

Use ProRes 4444 MOV for transparency:

python3 "$skill_dir/scripts/render_3d_chladni.py" \
  --workspace "$(pwd)" \
  --alpha \
  --output "$(pwd)/out/3d-chladni-alpha.mov"

Behavior

• Accept either a parent workspace or an existing 3D Chladni checkout through --workspace.
• Clone https://github.com/nolangz/3D-Chladni.git into <workspace>/3D-Chladni when absent.
• Fetch and fast-forward the selected branch when the checkout is clean.
• Refuse to update a dirty checkout; use --skip-update to preserve intentional local edits.
• Install project dependencies with npm ci only when Electron is missing, unless --skip-install is set.
• Invoke the repository's pixel-exact Electron exporter instead of screen-recording the live page.
• Default to 1280×720, 30 fps, 6 seconds, 15% particles, sweep lighting, and precession.
• Use deterministic seeds so reruns with the same settings reproduce the same particle motion.
• Accept .mp4 for H.264 and .mov for ProRes; require .mov when --alpha is used.
• Validate the finished container with ffprobe, including dimensions, duration, and audio-stream presence when --audio is supplied.
• Pass --pattern /absolute/path/pattern.json to render a saved Chladni pattern.

Requirements

• git
• Python 3.9+
• Node.js and npm
• ffmpeg and ffprobe
• Network access for the initial clone and dependency installation

Preview Asset License

assets/3d-chladni-cosmic.gif is adapted from the source project's demo media. Attribution: 3D Chladni media by Lykno, licensed under CC BY-NC 4.0.