Open source alternatives to PhysX

One project on starwire does the same job. Ranked by how much of what PhysX does each one covers, read from its README and website. Ties go to the most active.

What PhysX does

Rigid body physicscore
Collision detectioncore
Character controllers
Cloth, particle and fluid simulation
GPU acceleration
Game engine integration

Each dot in the table is one job, in this order. Square dots are core jobs and count double. Full means yes, half means partly. "See the evidence" under a project shows the line behind each one. Coverage is what a project documents, not how well it works or how hard it is to move to. How we score this

Project	Covers	Stars	Commits, 12 weeks	Last release	Closed vs opened	Setup	License
JoltPhysicsMulti-core rigid body physics and collision library in C++ for games and VR	Replaces it81%	12k+53	94	4 months ago	100%	For developers	MIT
Covers all 2 core jobs. Partly: Cloth, particle and fluid simulation; GPU acceleration; Game engine integration.See the evidence Rigid body physicscoreYesSimulation of rigid bodies of various shapes Collision detectioncoreYesusing continuous collision detection Character controllersYesGame character simulation (capsule) Cloth, particle and fluid simulationPartlya soft ball or piece of cloth GPU accelerationPartlyA strand based hair simulation running on GPU Game engine integrationPartlyintegrate Jolt Physics in a CMake project

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