Show HN: Sand Vibrations App (Chladni Patterns)

Discover the mesmerizing world of Chladni patterns. Draw sand, control vibrations, and watch as physics creates beautiful geometric art. Feel every pattern with haptics!

"If you want to find the secrets of the universe, think in terms of energy, frequency, and vibration." — Nikola Tesla

Transform sound into stunning visual art with Sand Patterns, an interactive physics simulation that brings Ernst Chladni's 18th-century discovery to life. Watch as invisible sound waves sculpt thousands of sand particles into mesmerizing geometric patterns, revealing the hidden mathematics that shapes our universe.

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~ Create & Explore~
Draw sand with simple gestures, adjust pattern complexity with the intuitive XY pad, and switch between square and circular plates. Control pattern modes from 1 to 16 for endless geometric combinations with up to 100,000 particles flowing in real-time.

~ Feel the Physics ~
Experience synchronized haptic feedback and audio tones that match your visual patterns. Real-time frequency calculations show the precise mathematics governing each design.

~ Features ~
Metal-powered simulation • 60-120 FPS performance • Haptic feedback • Audio synthesis • Pattern saving • Dark mode • No ads

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Whether you're a physicist, digital artist, or simply someone who appreciates the elegant patterns underlying reality, Sand Patterns offers a meditative journey into the profound connection between sound and form—where Tesla's vision of frequency and vibration becomes tangible art in your hands.