Physics simulations

Browser-based physics sandboxes. Verlet integration, particle systems, dipole fields, 1D momentum exchange, height-field water — all driven by your cursor.

11 simulations

• Ball pitA box of bouncing balls with circle-circle collisions. Cursor repels, click shoves them outward, periodic earthquakes jolt the pit.
• BubblesBubbles rise toward the surface as god-rays slant down; cursor draws them into a swirl.
• Chladni plateSand on a vibrating plate. Cursor x and y set the (n,m) mode; particles step along the gradient until they cluster on the nodal lines.
• ClothPinned verlet cloth grid in ambient wind. Cursor pushes the mesh; mouse-down grabs the nearest free node and drags it.
• FireworksRockets launch from a skyline silhouette and burst into chrysanthemum, willow, ring, or crossette patterns. Click for a burst.
• Bar magnetA bar magnet rides the cursor and rotates with cursor velocity. Iron filings align to the dipole field and drift toward the nearest pole.
• Horseshoe magnetHorseshoe magnet with two parallel poles. Filings trace the arched field between the tips and drift toward the nearest pole.
• Newton's cradleSix steel balls on strings with 1D momentum exchange. Cursor near a ball nudges it; mouse-down + drag pulls it back to swing.
• Pendulum chainVerlet rope with 20–50 nodes hung from a top anchor. Cursor near the tip grabs it; click flings it. Ornaments dangle from intermediate nodes.
• Water boxParticle-based water with surface tension and gravity in a box. Cursor pushes the body of water; click creates a splash impulse.
• Water rippleHeight-field water surface — top-down, depth-tinted. Cursor and clicks push concentric waves; foam highlights tall crests.

Other categories

• Chaos & emergenceStrange attractors, slime mold pathfinding, branching lightning, neural propagation — emergent behavior from simple rules.
• Life & natureBoids, murmurations, fish schools, fireflies, sheepdogs, autumn leaves, growing plants — cursor-driven nature scenes.
• Space & astronomySolar system, black hole accretion, gravitational lensing, meteor shower — interactive astronomy in the browser.
• All simulationsEvery cursor-driven canvas world on crsor — 32 in total.