NVIDIA PhysX Engine

PhysX is a physics simulation engine developed by NVIDIA (acquired from Ageia). It simulates rigid bodies, soft bodies, fluids, and particles in real time. PhysX can run on CPU or GPU; GPU-accelerated PhysX on NVIDIA cards achieves 30-100x speedup for large scenes. PhysX handles collision detection, constraint solving (joints, motors), friction, gravity, and particle effects. Games and simulations use PhysX for character ragdolls, vehicle dynamics, cloth, destructible environments, and visual effects.