Node Playground
A real-time physics workshop: drop machines, material, water and structures on the ground and drive them with the keyboard.
Product pages are in English.

Highlights
- Excavator, dump truck, buggy, tractor and trailers, mortar truck, silo, belt, auger, press and crane
- Sand, soil, gravel and wheat that slide at their angle of repose; ponds and flowing particle water
- Bridge tool: girders sized by formula, and the deck collapses at 1.5 × its design load
- Live readouts on every card, and sound made from the running physics, not recordings
- Templates from Excavator & truck to Mountain road; free with a Twinsys account
A question it answers
What does this machine actually do to the material and the things around it when I drive it — and do the numbers on its card agree with the rule I would size it with?What you put in
Objects added from the right-click menu or one of the templates — terrain (flat, hills, a course, the Mountain road climb, a Node Studio template or graph, or a .nodes.json file), heaps of sand, soil, gravel or wheat, a water field or particle water, excavator, off-road vehicle, dump truck, mortar truck, tractor and trailers, silo, belt conveyor, screw auger, hydraulic press, wrecking crane, block wall and bridge — each a card of parameters in metres; live settings change the running scene; the keyboard drives the chosen machine, and the Select, Move, Rotate, Pull and Bridge tools place, carry and build in the running scene.
What you get
A live 3D scene at 60 steps per second with sound made from the physics, and live readouts on every card: bucket fill and payload, truck payload and bed fill, static sag against m·g/4k, silo discharge against Beverloo's law, belt throughput, auger capacity and delivery, press force and the part's failure load, wrecking-ball speed and energy, where a mortar round will land and the crater it digs, the tractor's progress and climb time on the mountain road, and a bridge's load against its collapse load. Scenes save to the computer or the cloud (File).
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