Box2d

Jul 20, 2023

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Box2D is a 2D physics engine for games.

Collision

  • Continuous collision detection
  • Contact callbacks begin, end, pre-solve, post-solve
  • Convex polygons and circles
  • Multiple shapes per body
  • One-shot contact manifolds
  • Dynamic tree broadphase
  • Efficient pair management
  • Fast broadphase AABB queries
  • Collision groups and categories

Physics

  • Continuous physics with time of impact solver
  • Persistent body-joint-contact graph
  • Island solution and sleep management
  • Contact, friction, and restitution
  • Stable stacking with a linear-time solver
  • Revolute, prismatic, distance, pulley, gear, mouse joint, other joint types
  • Joint limits, motors, and friction
  • Momentum decoupled position correction


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