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ReactPhysics3D
An independent open rigid-body engine with shapes, joints, queries, events, and fixed-step-friendly simulation.
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Why use it
Moderate code size and few dependencies fit teaching, custom engines, and projects not needing a full SDK.
Where it fits
Find engines, frameworks, code libraries, version control, and production automation.
physicsengine-programming
What to check
Vehicles, cloth, and editor tooling are out of scope; teams need their own complex-stability test suite.