Recommended Simulations
Popular★★★
SPH Fluid
Smoothed Particle Hydrodynamics — pressure, viscosity and gravity
on 1 000 particles.
Popular★★☆
Spiral Galaxy
80 000 stars forming a spiral galaxy with density wave arms,
nebulae and bulge.
★★★
N-Body Gravity
Leapfrog integrator + Barnes-Hut Oct-Tree. Galaxy collisions and
gravitational chaos.
★★☆
Ocean Waves
Gerstner wave summation in GLSL vertex shader — wind speed,
direction, storm presets.
Popular★★☆
3D Boids Flocking
500 agents follow Reynolds' three rules — separation, alignment,
cohesion — with spatial hashing.
Popular★★☆
Solar System
All 8 planets with real orbital parameters, moons, rings and Bloom
post-processing.
★★☆
Kepler Planets
Kepler's laws with elliptical orbits — eccentricity, period and
equal areas in equal times.
★★★
Tectonic Plates
7 lithospheric plates drift, collide and subduct on a spherical
Earth.
★★☆
Cloth Simulation
Spring-mass model with Verlet integration. Drag cloth, drop on
sphere, feel the wind.
Popular★★☆
Car Physics
Bicycle model suspension + drift physics. WASD controls, nitro
boost, tire-smoke particles.
★★☆
Interactive Ocean
Interactive ocean surface with foam, Fresnel reflections and
tsunami mode.
★★☆
Double Pendulum
Euler-Lagrange equations with RK4. Up to 40 pendulums reveal
chaotic divergence.
Popular★★☆
Lorenz Attractor
Deterministic chaos — tiny differences spiral into wildly
different trajectories.
★☆☆
Conway's Game of Life
Classic B3/S23 plus HighLife, Day&Night. Flat, height-map and
sphere display modes.
★☆☆
Sand Automaton
Cellular automaton with sand, water, lava, fire, gas and plants.
Draw elements and watch physics unfold.
★★☆
Ant Colony (ACO)
Pheromone matrices guide colony foraging. Two competing colonies
fight for food.
★★☆
Rainbow & Optics
Ray tracing through water droplets — primary and secondary bows,
dispersion and Alexander's dark band.
★☆☆
Bubble World
Surface tension, iridescent thin-film interference and
merging/popping dynamics.
★☆☆
Fireworks
Particle system with gravity, fade-out and 10 colour modes. Click
anywhere to launch.
★★☆
Domino Chain
3D domino chain reaction with Cannon-es physics. Adjustable
spacing and camera follow.
★☆☆
Spirograph
Hypotrochoid and epitrochoid curves with adjustable inner/outer
radii and pen offset.
★☆☆
Aquarium
Colourful fish with Boids-lite behaviour. Feed them, customise,
choose tropical or deep-sea.
★★☆
Pathfinding — A*, Dijkstra
A*, Dijkstra, Greedy BFS on interactive grid. Draw walls, set
start/end, race algorithms.
★★☆
SIR Epidemic Model
Agent-based disease spread on a 2D grid. Tune R₀, vaccination rate
and epidemic curve.
★★☆
L-Systems — Procedural Plants
10 presets, turtle graphics, fractal trees and procedural flora
with adjustable iterations.
★☆☆
Fractal Explorer
Mandelbrot and Julia sets with GPU GLSL smooth colouring. Infinite
zoom with parameter morphing.
★★☆
Reaction-Diffusion
Gray-Scott model — zebra patterns, coral branching and leopard
spots. Turing's morphogenesis.
★★☆
Natural Selection
Agent-based evolution with 3 heritable traits. Predators hunt by
visibility; survivors reproduce with mutation.
★★★
Evolutionary Game Theory
Hawk-Dove, Prisoner's Dilemma and Rock-Paper-Scissors on spatial
grid with ESS analysis.
★★☆
Force-Directed Graph
Fruchterman-Reingold for Erdős-Rényi, Barabási-Albert and
Watts-Strogatz networks.
★★☆
Minimum Spanning Tree
Step-by-step Kruskal (Union-Find) and Prim. Edge weights, colour
legend, play/pause/step.
★★☆
Genetic Algorithm
Tournament selection, crossover and mutation. Weasel program +
Rastrigin function optimisation.
Popular★★☆
Neural Network Visualiser
Live backpropagation on XOR, circle and spiral. Watch weights
update and decision boundary form.
★★☆
Procedural Terrain
fBm noise, biomes, hydraulic erosion and PNG height-map export.
★★★
Orbital Mechanics
Velocity Verlet, Lagrange points, gravity-assist slingshot
trajectories.
★★☆
Star Evolution
Stellar lifecycle from gas cloud to supernova with live HR diagram
tracking.
★★☆
Atmospheric Optics
Rayleigh scattering, rainbow formation, halo and droplet
ray-tracing.
★★☆
Travelling Salesman — TSP
Greedy, 2-opt and simulated annealing — optimise city tour in real
time.
★★☆
Tornado — Vortex
Particle vortex funnel with debris, Navier-Stokes inspired
dynamics.
★☆☆
Number Spirals
Ulam, Sacks, Fibonacci spirals and prime heatmaps — visualise
number patterns.
★☆☆
Flow Fields
3 000 particles move through Perlin noise field. 4 palettes,
adjustable noise scale and speed.
★★☆
Stippling & Pointillism
Weighted Voronoi + Lloyd's relaxation, spatial hash, 4 patterns, 3
styles.
★★★
Rocket Launch (Tsiolkovsky)
Two-stage rocket, live Δv budget, kick manoeuvre, orbit detection
and stage separation.
★★★
Atmospheric Re-entry
Sutton-Graves heating, drag/lift, results:
landing/skip/burnup/parachute.
★★☆
Earth Energy Balance
Zero-dimensional EBM: ice-albedo feedback, CO₂ forcing, animated
photon/IR particles.
★★☆
Carbon Cycle
4-reservoir model (atm ↔ bio ↔ surface ocean ↔ deep ocean),
permafrost feedback, ocean pH.
★☆☆
Motion Aftereffect
Archimedean spiral adaptation — neural fatigue creates illusory
reverse motion.
★☆☆
Colour Contrast Illusions
Simultaneous contrast, Mach bands, Adelson's shadow — reveal same
colour values.
★★★
Protein Folding
HP-lattice model, Metropolis criterion, simulated annealing T
2.5→0.02, best chain overlay.
★★☆
Cell Membrane Diffusion
Simple, facilitated and active transport. ATP pump drives ions
against concentration gradient.
★★☆
Decision Tree Live
CART splits with Gini impurity, auto-growing depth 0→8, datasets
XOR/Moons/Blob.
★★★
Reinforcement Learning
Q-table 8×8×4, ε-greedy, Bellman update, heatmap of Q-values. 3
maze presets with fire traps.
★★☆
Self-Organising Map
576-neuron Kohonen SOM, Gaussian neighbourhood, decay α and σ, 4
colour distributions.
★★☆
Magnus Effect — Ball Spin
Newton drag + Magnus force, 3 simultaneous trajectories, 3 ball
types.
★★☆
Ballistics & Projectile
Vacuum vs Newton drag, angle sweep 10°–80°, optimal angle shifts
below 45° with drag.
★★☆
Swimming Hydrodynamics
4-lane pool, thrust-drag ODE, animated schematic swimmers,
terminal velocity sliders.
★★★
Nuclear Fission Chain
U-235 enrichment + moderation. Thermal/fast neutrons, live
k-factor, sub/critical/supercritical.
★★☆
Radioactive Decay
Stochastic decay N₀ nuclei with N₀·e^(−λt) comparison. Live grid +
graph.
★★☆
Binding Energy Curve
Bethe-Weizsäcker B/A for A=2–250, tunable coefficients, 16
labelled nuclides, Fe-56 peak.
★★☆
Inverse Kinematics (FABRIK)
Three modes: single, mirror, spider with 6 auto-orbiting chains.
FABRIK forward+backward pass.
★★☆
Drone Swarm
Boids SEP/ALI/COH, 4 formations (flock/circle/grid/wedge),
X-shaped bodies with rotors.
★★★
Hexapod Walker
2-link analytical IK, tripod and wave gaits, camera follows body,
rough terrain mode.
★☆☆
Caesar & Vigenère Ciphers
Two panels with 26-bar frequency graphs and index of coincidence
IC analysis.
★★☆
RSA Key Exchange
Step-by-step: primes p/q, φ(n), extended Euclidean d, BigInt
modpow encryption.
★★☆
Diffie-Hellman Key Exchange
Two columns: step-by-step math + colour-mixing analogy. Eve's
discrete log problem.
★★★
Elliptic Curve (ECC)
Interactive y²=x³+ax+b graph, P+Q addition and k·P scalar
multiplication modes.
★★☆
Rayleigh Scattering
Sky gradient, I∝1/λ⁴ spectrum bars, Chapman function, 320 molecule
scatter animation.
★★☆
Why Ice Floats
Molecular model N=100, H-bonding order parameter, density vs T
polynomial graph.
★★☆
Doppler Effect
Moving source, circular waves, Mach cone, two observers,
f'=f/(1∓Mach).
★★☆
Gyroscope & Precession
Canvas 2D 3D-projection, vectors L/τ/Ω, falls without spin —
precesses with spin.
★★☆
Cyclone & Coriolis
N=300 particles, rotating reference frame, NH/SH switch,
cyclone/anticyclone/no Coriolis.
★★☆
Cloud Formation
N=500 particles, Bolton dew point, RCK condensation level,
cumulus/stratus/cumulonimbus presets.
★★☆
Geodesic Domes
Icosa/Octa/Tetra geometry, freq 1v-5v, dome/sphere,
wireframe/solid, face-edge-vertex stats.
★★☆
Spherical Projections
5 projections (Equirectangular, Mercator, Mollweide, Lambert,
Sinusoidal), Tissot indicatrices.
★★★
Qubit & Bloch Sphere
State [αr,αi,βr,βi], gates X/Y/Z/H/S/T via 4×4 matrices, smooth
lerp, gate log.
★★★
Quantum Entanglement
4 Bell states, weighted stochastic measurement, entanglement beam,
CHSH inequality S=2√2.
★★★
Grover's Search
N=16, oracle + Grover diffusion, 3 optimal iterations, amplitude
histogram, O(√N) vs O(N).
★★☆
NaSch Traffic Model
L=200 ring, 4 NaSch CA rules, space-time diagram HIST=80, phantom
traffic jams.
★★☆
Pedestrian Flow
N=100 Social Force Model agents, room evacuation, panic mode
(faster-is-slower).
★★☆
City Growth CA
80×54 grid, 4 states (vacant/residential/commercial/industrial),
configurable sprawl radius.
★★☆
Bus Bunching
12 stops, 3 buses, positive feedback loop, bunching index, holding
strategy.
★☆☆
Logic Gates
8 gate types (AND/OR/NOT/XOR/NAND/NOR/XNOR/BUF), IEEE symbols,
animated pulses, truth table.
★★☆
8-Bit Adder
Ripple-carry adder, 8-bit A+B, carry chain, result in
binary/hex/decimal, overflow flag.
★★☆
Transistor BJT / MOSFET
NPN BJT and N-MOS I-V curves, load line, Q-point,
saturation/active/cutoff regions.
★★☆
RC Filters
Bode diagram LP/HP/BP on log axis, −3 dB marker, animated
input/output time signals.
★★☆
ADC / DAC Sampling
Continuous wave + samples + staircase reconstruction, aliasing
detection, Nyquist theorem.
★☆☆
Maze Generator
DFS, Prim's, Kruskal's, Wilson's generation + BFS solver.
Step-by-step animation.
★★☆
Prey–Predator (Lotka–Volterra)
Agent-based Lotka-Volterra with population graphs and phase-space
diagram.
★☆☆
Sierpiński Triangle
Chaos game, L-system and subdivision methods for the classic
fractal.
★☆☆
Sorting Algorithms
15+ algorithms visualised with animated bars and Web Audio API
tones.
★☆☆
1D Cellular Automata
Wolfram rules 30/110 + Conway extensions. Binary rule selector,
pattern evolution.
★☆☆
Snow Crystal — DLA Growth
Diffusion-limited aggregation with hexagonal symmetry, crystal
form classification.
★★☆
Binary Stars
Two stars orbiting their common centre of mass, mass ratio and
eccentricity controls.
★★☆
Mechanisms
Gear trains, crank-slider, four-bar linkage — mechanical
transmission visualisation.
★★☆
Billiards Physics
Elastic collisions, spin, cue aiming — 3D billiard table
simulation.
★★★
Fracture Simulation
Voronoi fracture of solid bodies under impact — crack propagation
and fragment physics.
★☆☆
Rain & Puddles
Cloud → drops → ripple rings. 4 modes: drizzle, downpour,
thunderstorm, sun shower.
★☆☆
Balloons
Buoyancy, pop with confetti, mini-game catch mode, wind slider and
accelerometer.
★☆☆
Magic Sand & Smoke
Draw with mouse — sand/smoke/fire/water modes. Cellular automata
particle physics.
★☆☆
Butterflies & Flowers
3–5 butterflies with steering behaviour, metamorphosis animation,
fact popups.
★☆☆
Migrating Bird Flock
V-formation flocking with lead rotation and energy-saving draft
effect.
★★☆
Fox & Rabbits
Agent-based predator-prey with population dynamics and hunting
strategies.
★☆☆
Kaleidoscope
Symmetric mandala patterns with adjustable segments and colour
palettes.
★☆☆
Pythagoras Tree
Recursive fractal tree built from squares and right triangles with
adjustable angle.
★★☆
Wave Equation
2D wave equation with interference, reflection and absorption
boundaries.
★★☆
Fourier Series
Build square/sawtooth/triangle waves from harmonics — see each
term add up visually.
★★☆
Chladni Figures
Vibrating plate nodal patterns — sand particles settle along modal
shapes.
★★☆
Evacuation Simulation
Crowd evacuation dynamics, exit placement optimisation and panic
behaviour.
★★☆
Traffic Simulation
Cellular automaton traffic with lane changes, traffic lights and
congestion waves.
★★☆
Game Theory
Nash equilibrium, Prisoner's Dilemma, coordination games with
payoff matrices.
★★☆
Disease Spread (SEIR)
SEIR compartmental model with vaccination, quarantine and contact
tracing.
★★☆
Double-Slit Experiment
Wave-particle duality — photon-by-photon build-up of the
interference pattern.
★★★
Schrödinger Equation
1D time-dependent Schrödinger equation with potential barriers and
wells.
★★☆
Hydrogen Orbital
3D probability density of hydrogen atom orbitals — s, p, d shells
visualised.
★★★
Molecular Dynamics
Lennard-Jones potential, velocity Verlet, temperature/pressure
control.
★★☆
Ising Model
2D ferromagnet phase transition — Metropolis algorithm,
magnetisation vs temperature.
★★☆
Fire & Smoke
Cellular automaton fire with convective smoke, wind and fuel
parameters.
★★☆
Crystal Growth
DLA crystal nucleation and growth with lattice symmetry and
supersaturation control.
★★☆
Terrain Generator
Multi-octave noise terrain with biome colouring and real-time
parameter adjustment.
★★★
Kármán Vortex Street
Lattice Boltzmann method, Re number control, vortex shedding
behind a cylinder.
★☆☆
Langton's Ant
Simple rules, complex highway — emergent behaviour from a 2-state
Turing machine.
★★☆
Magnetic Field Lines
Dipole field lines, compass needles, force vectors and B-field
magnitude contours.
★☆☆
Forest Fire Spread
Cellular automaton fire spread — wind, terrain slope and moisture
parameters.
★☆☆
Random Walk
1D/2D random walks, N walkers, drift bias, diffusion coefficient
and MSD analysis.
★☆☆
Voronoi Diagram
Interactive Voronoi tessellation — Fortune's algorithm, Delaunay
dual, centroidal relaxation.
★☆☆
Pendulum Wave
15 pendulums with carefully chosen lengths — mesmerising wave
patterns emerge and collapse.
★★☆
Spring-Mass Network
Connected mass-spring network with adjustable stiffness, damping
and topology.
★★☆
Particle Diffusion
Brownian motion, Fick's law, concentration gradient equalisation
in real time.
★★☆
Wave Interference
Two circular sources, constructive/destructive interference
patterns, nodes and antinodes.
★★☆
Epidemic Dynamics
SEIR dynamics with agent-based spread on grid, contact tracing and
intervention strategies.
★★☆
Rössler Attractor
3D chaotic attractor with multiple trajectories, RK4 integration
and parameter control.
★☆☆
Schelling Segregation
Agent-based segregation model — small individual preferences
create large-scale patterns.
★★☆
Bifurcation Diagram
Logistic map route to chaos — period doubling, Feigenbaum
constant, zoomable canvas.
★★☆
Electric Field Lines
Coulomb's law field lines, equipotentials, drag charges, dipoles
and quadrupoles.
★★☆
Van der Pol Oscillator
Limit cycle oscillator, phase portrait, μ parameter sweeps from
harmonic to relaxation.
★★☆
Thomas Attractor
3D chaotic attractor with parameter b, multiple chaos regimes and
orbit control.
★☆☆
Barnsley Fern
IFS affine transforms — 4 presets, colour modes, iterated function
system beauty.
★★★
Mantle Convection
WebGL finite-difference Boussinesq — Rayleigh number, viscosity,
thermal diffusivity.
★☆☆
Meteor Shower
Atmospheric entry streaks, constellation backdrop, radiant point
and ZHR counter.
★★☆
Seismic Waves
P-wave and S-wave propagation through layered Earth, seismogram
recording.
★★☆
Photoelectric Effect
Einstein's photon model — threshold frequency, photon energy vs
kinetic energy plot.
★★☆
Wave Function Collapse
Procedural generation algorithm — tile-based worlds from local
adjacency constraints.
★★☆
Ragdoll Physics
2D ragdoll with joint constraints, gravity and impulse
interaction.
★★☆
Field of View — NPC Sight
NPC vision cone, ray casting through obstacles, line-of-sight
stealth mechanics.
★★☆
Bridge Structural Analysis
FEM truss analysis — node forces, member stresses, deflection
under load.
★★★
LEFM Fracture Mechanics
Stress intensity factor, crack tip fields, K_IC toughness and mode
I/II loading.
★☆☆
Thermal Expansion
Linear and volumetric thermal expansion — material compar ison,
bimetallic strip bending.
★☆☆
Solar System for Kids
Simplified solar system — click each planet for fun facts,
kid-friendly controls.
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