Physics simulations you can observe and interact with, like an aquarium or an ant farm. Each "box" is a sandbox for experimenting with a physical phenomenon. The simulations have grown over many years as personal toy projects, but have recently been polished and given a friendlier interface.
Every planet is built from tens of thousands of particles of rock and iron that pull on each other with gravity, collide, heat up and splash. Recreate the impact thought to have formed the Moon, try a grazing hit or a head-on collision, or build your own system from empty space. Cut the planets open to see the core and mantle, colour them by temperature or density, and rewind or replay a run from any angle.
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Weather in a Box shows a slice of landscape from the side, with the atmosphere above it up to 20 km. The sun warms the ground, warm air rises, clouds form and rain or snow falls, and wind over the mountains makes waves and clouds in the lee. Heat or cool the air, add moisture, push the wind and reshape the terrain, then switch to maps of temperature, humidity or wind to see what is going on. A 3D mode shows clouds building over a whole area.
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Pick any stretch of coast on Earth, and the simulation loads real sea floor and terrain heights for it. Start a wave by hand, or let a fault in the sea floor lift, sink or tilt, and watch the tsunami spread, slow down over shallow water and run up onto land. Place measuring points to follow the water level, draw a profile across the coast, and see how high the water reached and which areas were flooded.
Read more ↗I'm Thomas Grønneløv, and I studied physics and computer science. I've liked simulations since some of the first programs I wrote, and I ended up working on physics and high-performance computing in the games industry. Now I work solo on my own projects.
Simulations in a Box is where I build the simulations I most want to play with myself, with real physics that keeps running while you change things.
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