Map

Tide Harmonics

Measured tide height at San Francisco with a two-constituent harmonic model (M2 plus S2). From The Nature of Code, Chapter 3: Oscillation.

Nature of Code Harmonic Motion Tides San Francisco seeding

Seismograph Cloth

A taut verlet cloth pinned along its border, struck by a week of real earthquakes so global seismicity replays as ripples. From The Nature of Code, Chapter 6: Physics Libraries.

Nature of Code Verlet Integration Soft Body Earthquakes Global seeding

River Tree

A real dendritic river network from OpenStreetMap around the Colorado-Green confluence, drawn by waterway class. From The Nature of Code, Chapter 8: Fractals.

Nature of Code Fractals Recursion Rivers Colorado River OpenStreetMap seeding

Waggle Dance

The honeybee waggle dance modeled algorithmically: a location encoded as a vector, decoded by follower bees. An animal embedding. Built with Nature of Code principles.

Nature of Code Vectors Oscillation Embeddings Bees Animal Communication seeding

Wind Riders

Neuroevolution: neural steering controllers evolved by a genetic algorithm to cross a real wind field on a fuel budget. From The Nature of Code, Chapter 11: Neuroevolution.

Nature of Code Neural Networks Genetic Algorithms Wind US Northeast seeding

Rain Perceptron

A single-layer perceptron classifying rain from daily humidity and pressure over a year of New York weather (Open-Meteo archive). From The Nature of Code, Chapter 10: Neural Networks.

Nature of Code Perceptron Weather New York seeding

Capitals Tour

A genetic algorithm minimizing a closed tour of 22 world capitals by great-circle distance, an instance of the traveling salesman problem. From The Nature of Code, Chapter 9: Genetic Algorithms.

Nature of Code Genetic Algorithms Traveling Salesman World Capitals seeding

Hornet Invasion

A cellular automaton calibrated to real Vespa velutina occurrence records spreading across Europe from 2013 to 2025 (GBIF). From The Nature of Code, Chapter 7: Cellular Automata.

Nature of Code Cellular Automata Asian Hornet Europe seeding

Sky Boids

A Reynolds boids flock steering to avoid real live aircraft over the Alps (OpenSky Network). From The Nature of Code, Chapter 5: Autonomous Agents.

Nature of Code Flocking Boids Aircraft Alps seeding

Air Plumes

Particle emitters whose emission rate is set by real PM2.5 concentration in three cities (Open-Meteo). From The Nature of Code, Chapter 4: Particle Systems.

Nature of Code Particle Systems Air Quality Berlin Delhi Los Angeles seeding

ISS Ground Track

The International Space Station's live ground track, a body in gravitational orbit projected onto the Earth's surface. From The Nature of Code, Chapter 2: Forces.

Nature of Code Forces Ground Track ISS Orbit seeding

Wind Field

Streamlines integrated through a real forecast wind field (Open-Meteo), sampled on a grid and bilinearly interpolated. From The Nature of Code, Chapter 1: Vectors.

Nature of Code Vector Field Streamlines Wind US Northeast seeding

Earthquake Walk

A random walk with step lengths drawn from real earthquake magnitudes (Gutenberg-Richter distributed), producing a Levy flight. From The Nature of Code, Chapter 0: Randomness.

Nature of Code Random Walk Levy Flight Earthquakes Global seeding

MexiCable