2D物理引擎 Box2D Physics Engine 介绍

Collision

  • Convex polyons and circles.
  • Multiple shapes per body
  • One-shot contact manifolds
  • Incremental sweep-and-prune broadphase
  • Efficient pair management
  • Fast broadphase AABB queries
  • Collision groups and categories

Physics

  • 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, and mouse joints
  • Joint limits, motors, and friction
  • Momentum decoupled position correction
  • Fairly accurate reaction forces/impulses

System

  • Small block and stack allocators
  • Centralized tuning parameters
  • Highly portable C++ with no use of STL containers

Testbed

  • OpenGL with Freeglut
  • Graphical user interface with GLUI
  • Easily switch between tests using GUI
  • Test framework for easily adding new tests
  • Mouse picking and the bomb!
  • VC8 project files
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