Demos

Can motion reveal intent? Compare curved cursor forecasts, alternate routes and measured uncertainty with where your pointer actually goes. All measurements stay in this page.

A live 1D shallow-water simulation. Pick a vessel, a sea-floor topography and a weather condition, then click or tap the water to send a ripple through it. Waves slow down and grow taller over shallow water, reflect off solid walls, and fade out at open boundaries.

A particle fluid sandbox. Draw water, oil, foam, honey, slime, gel, sand and air, build walls, pipes, drains and air jets, heat it to steam or freeze it to ice, and float a fleet of eighteen ships that heel, capsize and swamp. Buoyancy, surface tension, the angle of a sand pile and a sandcastle washing away are all emergent. An expansion of Peter Blaskovic's Water Simulation, built on Clavet, Beaudoin and Poulin's particle-based viscoelastic fluid method.

Build a sandcastle on an isometric beach diorama. Every layout is procedurally generated: the sand bars, channels, rocks, scrub, coral and palms land differently on each roll. Sand is only one of the materials, alongside turf, stone, ice and molten rock, and the layouts run from beaches to rocky cliffs to volcanic isles to a small continent laid out like Westeros. Volcanoes erupt on their own schedule and the lava sets into new stone where it meets the sea. Map size runs from small enough for a phone to large enough to get lost in. Loose sand slumps to a dune, but patted down or stamped from a bucket it packs, and packed sand holds a vertical wall the way real damp sand does. The castle bucket stamps a whole keep, towers, crenellated walls, gatehouse and moat in one go. The water is solved with the shallow water equations, so the tide comes in and goes back out, and where the current runs fast enough it lifts sand off the bed, carries it downstream and drops it where the flow slows, which is how the sea takes a castle apart.