JavaScript to WebAssembly Examples

blackhole Schwarzschild geodesics, ray-traced — the far disk arcs over the shadow, brighter on the approaching limb

nbody three bodies in a chaotic dance tear each other’s star disks into tidal bridges and tails

$three.js Math$

threejs‑math three.js’s own Vector3/Matrix4/Frustum, unmodified — a camera culls a field of spheres against the view frustum; drag to steer

boids Reynolds flocking — cohesion, alignment, separation; the cursor is a hawk

fireflies Kuramoto oscillators — neighbour-coupled fireflies lock into traveling waves of synchrony

swarm flies chase the cursor, every path kept as a long-exposure hairline

dwa a robot rolls out every reachable velocity and drives the arc that races to the goal while clearing drifting obstacles — local motion planning

chladni two standing waves interfere into a plate nodal figure — drag to sweep the mode

mandelbrot escape-time fractal — perturbation theory carries the zoom past 10³⁰×

julia z² + c drawn by its distance estimate — a crisp white coastline in a soft glow; click any point to make it c

buddhabrot density of Mandelbrot escape orbits — a luminous nebula accumulates

spectra eigenvalues of a stream of random 6×6 matrices — Bohemian lace melts into a spectral cloud

burningship escape-time on |Re|,|Im| — a galleon ablaze below the Mandelbrot set

newton Newton's method on z³−1 — basins of attraction meet on a fractal edge

lyapunov Markus–Lyapunov “zircon” — order in gold, chaos in dark

domain‑color an enhanced phase portrait — bands of log|f| cross sectors of arg f in a conformal checkerboard that shrinks into every zero and pole

fern the chaos game on four affine maps grows a fern that sways

sph smoothed-particle liquid sloshing in a rocking tank — pairwise repulsion & viscosity, the classic O(N²) sum

lbm lattice-Boltzmann flow — a dye filament wraps into the von Kármán vortex street

cloth Verlet cloth in 3D — a gathered satin curtain pleats at the rail; grab it, swing it, let the wind billow it

waves rain on black water — the 2D wave equation carries every ring, and each slope mirrors the studio lights

ocean Tessendorf FFT ocean — a Phillips-spectrum sea synthesized by inverse FFT, moonlit

pendulum every pixel an initial angle, shaded by time-to-flip — click a pixel to fly that pendulum live

magnet a damped bob over three magnets — each pixel shaded by which magnet wins; fractal basin boundaries

cradle a chrome Newton's cradle — kinetic energy passes down the row; each ball mirrors its neighbours

interference Huygens diffraction — drag from two sources to an N-slit grating

schrodinger quantum wavepackets diffract through a double slit, their wavefronts visible, fringes building up on a detector plate

hydrogen the electron clouds of the hydrogen atom — |ψₙₗₘ|² morphing s→p→d→f

erosion hydraulic erosion — rain carves the terrain; flux pools into a river network

plasma FBM domain-warp plasma laced with its own iso-lines — flowing silver silk

lorenz the butterfly that launched chaos theory — a strange attractor in 3D

attractors de Jong map — millions of iters into luminous curves

raymarcher a soft-shadowed SDF sphere field — Shadertoy on the CPU

metaballs liquid-metal blobs merge and split in the glow of their own field

voronoi brute-force nearest-site cells, drifting — white ribs with current flowing along them

phyllotaxis lit florets at the golden angle pack a sunflower head — a hair off 137.5° breaks it

harmonograph two damped pendulums trace precessing Lissajous figures

plume seven lines of trig unfold 40k points into sparkling feathers — tweet-sized generative art

epicycles a chain of rotating circles redraws a curve — the DFT made visible

bifurcation the logistic map's period-doubling cascade into chaos

times‑table chords i→i·k mod N draw cardioids, nephroids and beyond

apollonian Descartes' circle theorem packs circles within circles, forever

truchet two random arc tiles chain into an endless labyrinth — current runs its paths; tap to spark

penrose golden-ratio deflation — aperiodic order with five-fold symmetry

hyperbolic a (2,p,q) triangle group tiles the Poincaré disk in the black and white of Escher's Circle Limit — drag to travel

lsystem string-rewriting grammars grow eight classics — Koch, the dragon, Hilbert, Gosper, and plants that taper trunk to twig

ulam primes on a square spiral — diagonals of prime-rich quadratics

pascal‑sierpinski Pascal's triangle mod p — mod 2 is Sierpiński, primes remix it

gauss‑primes primes of ℤ[i] in the plane — eightfold-symmetric constellations

diffusion Gray–Scott coral & labyrinths — the growing fronts spark white

bz Barkley excitable medium — meandering spiral waves; drag to cut fronts into new spirals

game‑of‑life Conway's Life, straight into shared pixel memory

sand falling-sand automaton — pour sand, water & walls

sandpile Bak–Tang–Wiesenfeld sandpile — avalanches self-organize grains into a fractal mandala

lenia Orbium — continuous cellular life gliding through a smooth convolution field

slime Physarum — two rival colonies contest territory with competing transport networks

dla diffusion-limited aggregation — click to race competing crystals for the walker supply

maze recursive-backtracker maze, then BFS solve — current runs through its walls; touch to spark

wireworld a 4-state CA streaming current through a tiled microchip — bus banks, fan-out trees, clock farms

rule30 Wolfram's elementary CA — one rule, endless aperiodic complexity

ising Metropolis spin flips — domains order & melt through Tc, M(t) charted live

percolation occupy sites at probability p — the spanning cluster snaps in at p_c, P∞(p) charted live

watercolor ink on flowing water — a vortical fluid bath; drops bloom, strokes comb

marble paper marbling — stacked drops push into concentric stones, combs draw them to swirls

dithering David's lips from the real scan, a pyramid, a cube, a torus — one shadow-casting relief, seven 1-bit dithers

raytrace per-pixel ray tracing — soft shadows, a mirror sphere, and a refractive glass ball

pathtracer path-traced Cornell box — soft shadows, glass, color bleeding; converges live from noise

JavaScript to WebAssembly examples