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Scroll down for demo video, see docs for more, press title to flip guide.
Each pointer moves particles source or sink. Press to change moving source or sink. Right-click or touch-hold to pause particles source. Double-press to change physics and graphics. Try presets and tweaks at links below or developer console.


Verlet 2+1 states Euler 1+1 states Trails along states Tracers along states Bubbles Molecular Millions ⚠
+ form points / lines / both + light / dark / unlit + spin / still + source to sink gap / near + time-step variable / fixed + states merged / separate ⚠ + guide open / shut