Chladni Plates

Chladni Plates

Create text-free visual artifacts showing standing-wave nodal patterns on thin plates. Always run the bundled script; do not write a new simulator unless the user explicitly asks to modify the skill.

Required Workflow

1. Create or use an output directory, usually skill_output_<timestamp>_chladni-plates.
2. Choose a preset, palette, shape, and optional custom modes.
3. Run scripts/render_chladni_plate.py.
4. Verify artifacts with find.
5. Final answer must list exact artifact paths and report preset, shape, modes, palette, frames, and FPS from parameters.json.

Default command:

python3 skills/chladni-plates/scripts/render_chladni_plate.py \
  --out skill_output_<timestamp>_chladni-plates \
  --preset classic-square \
  --palette blue-sand \
  --size 1080 \
  --frames 48 \
  --fps 18

Presets

Use one of these values for --preset:

• classic-square: crossed square-plate nodal curves; best default.
• cathedral-window: high-order square interference with bright symmetry.
• bronze-drum: circular plate with radial and angular disk modes.
• radial-bloom: flower-like circular pattern for social visuals.
• long-bridge: rectangular plate with long-span standing waves.
• quiet-glass: subtle circular glass-like pattern for clean slides.
• custom: use explicit --shape, --modes, and other flags.

Palettes

Use one of these values for --palette:

• blue-sand: dark blue plate with pale sand-like nodal ridges.
• neon-noir: high-contrast cyan/magenta resonance field.
• copper-glass: bronze and glass tones for classic demonstrations.
• emerald-gold: green-gold science-art palette.
• ice-fire: blue/orange contrast for strong motion.
• monochrome: clean grayscale for slides.

Parameters

• --shape: square, rectangle, or circle.
• --boundary: free, fixed, or mixed. Use free unless the user specifies clamped/fixed edges.
• --modes: semicolon-separated mode list m,n:amplitude:phase.
  • Square/rectangle: m,n are x/y mode numbers.
  • Circle: m,n are angular order and radial index.
  • Example: --modes "4,7:1.0:0;7,4:-0.9:0.4;3,10:0.34:1.1".
• --aspect: width/height for rectangle.
• --size: output pixel height. Use 1080 for normal runs, 720 for faster previews, 1400 or higher for final stills.
• --frames: GIF frame count. Use 36-72 for normal animations.
• --fps: GIF frame rate. Use 16-24.
• --node-width: nodal ridge thickness. Smaller values create sharper sand lines.
• --grain: deterministic sand/film grain intensity.
• --drive: temporal drive strength for animation.
• --no-gif: skip GIF assembly when only a still image is needed.

Images and GIFs intentionally contain no rendered text. Titles and explanations belong in caption.txt, parameters.json, and README.md.

Recipes

Classic square plate:

python3 skills/chladni-plates/scripts/render_chladni_plate.py \
  --out skill_output_<timestamp>_chladni-plates \
  --preset classic-square \
  --palette blue-sand \
  --size 1080 \
  --frames 48 \
  --fps 18

Circular bronze resonance:

python3 skills/chladni-plates/scripts/render_chladni_plate.py \
  --out skill_output_<timestamp>_chladni-plates \
  --preset bronze-drum \
  --palette copper-glass \
  --size 1080 \
  --frames 60 \
  --fps 20

High-order square pattern:

python3 skills/chladni-plates/scripts/render_chladni_plate.py \
  --out skill_output_<timestamp>_chladni-plates \
  --preset cathedral-window \
  --palette neon-noir \
  --size 1200 \
  --frames 60 \
  --fps 20 \
  --node-width 0.045

Custom rectangular plate:

python3 skills/chladni-plates/scripts/render_chladni_plate.py \
  --out skill_output_<timestamp>_chladni-plates \
  --preset custom \
  --shape rectangle \
  --aspect 1.7 \
  --boundary free \
  --modes "2,5:1.0:0;6,3:0.72:0.5;9,2:0.30:1.1" \
  --palette ice-fire \
  --size 900 \
  --frames 48 \
  --fps 18

Outputs

The script writes:

• chladni_pattern.png: high-resolution text-free static nodal pattern.
• chladni_preview.png: first-frame preview PNG.
• chladni_animation.gif: animated vibrating-plate GIF unless --no-gif is used.
• frames/frame_*.png: individual animation frames.
• field_data.npz: final normalized field, mask, grid, and modes.
• parameters.json: exact run parameters and artifact paths.
• caption.txt: short plain-language explanation.
• README.md: run summary.

Do not claim success unless find lists the requested artifacts. For a normal GIF run, verify chladni_pattern.png, chladni_preview.png, chladni_animation.gif, frames/, field_data.npz, parameters.json, caption.txt, and README.md.