  b2AABB | An axis aligned bounding box |
| b2BlockAllocator | |
| b2Body | A rigid body. These are created via b2World::CreateBody |
| b2BodyDef | |
| b2BroadPhase | |
| b2ChainAndCircleContact | |
| b2ChainAndPolygonContact | |
| b2ChainShape | |
| b2CircleContact | |
| b2CircleShape | A circle shape |
| b2ClipVertex | Used for computing contact manifolds |
| b2Color | Color for debug drawing. Each value has the range [0,1] |
| b2Contact | |
| b2ContactEdge | |
| b2ContactFeature | |
| b2ContactFilter | |
| b2ContactID | Contact ids to facilitate warm starting |
| b2ContactImpulse | |
| b2ContactListener | |
| b2ContactManager | |
| b2ContactRegister | |
| b2ContactSolver | |
| b2ContactSolverDef | |
| b2ContactVelocityConstraint | |
| b2DestructionListener | |
| b2DistanceInput | |
| b2DistanceJoint | |
| b2DistanceJointDef | |
| b2DistanceOutput | Output for b2Distance |
| b2DistanceProxy | |
| b2Draw | |
| b2DynamicTree | |
| b2EdgeAndCircleContact | |
| b2EdgeAndPolygonContact | |
| b2EdgeShape | |
| b2Filter | This holds contact filtering data |
| b2Fixture | |
| b2FixtureDef | |
| b2FixtureProxy | This proxy is used internally to connect fixtures to the broad-phase |
| b2FreeList | |
| b2FrictionJoint | |
| b2FrictionJointDef | Friction joint definition |
| b2GearJoint | |
| b2GearJointDef | |
| b2GrowableBuffer | |
| b2GrowableStack | |
| b2IntrusiveListNode | |
| b2Island | This is an internal class |
| b2Jacobian | |
| b2Joint | |
| b2JointDef | Joint definitions are used to construct joints |
| b2JointEdge | |
| b2Manifold | |
| b2ManifoldPoint | |
| b2MassData | This holds the mass data computed for a shape |
| b2Mat22 | A 2-by-2 matrix. Stored in column-major order |
| b2Mat33 | A 3-by-3 matrix. Stored in column-major order |
| b2MotorJoint | |
| b2MotorJointDef | Motor joint definition |
| b2MouseJoint | |
| b2MouseJointDef | |
| b2Pair | |
| b2ParticleBodyContact | |
| b2ParticleColor | Small color object for each particle |
| b2ParticleContact | |
| b2ParticleDef | |
| b2ParticleGroup | A group of particles. b2ParticleGroup::CreateParticleGroup creates these |
| b2ParticleGroupDef | |
| b2ParticleHandle | |
| b2ParticlePair | Connection between two particles |
| b2ParticleSystem | |
| b2ParticleSystemDef | |
| b2ParticleTriad | Connection between three particles |
| b2PolygonAndCircleContact | |
| b2PolygonContact | |
| b2PolygonShape | |
| b2Position | This is an internal structure |
| b2PrismaticJoint | |
| b2PrismaticJointDef | |
| b2Profile | Profiling data. Times are in milliseconds |
| b2PulleyJoint | |
| b2PulleyJointDef | |
| b2QueryCallback | |
| b2RayCastCallback | |
| b2RayCastInput | Ray-cast input data. The ray extends from p1 to p1 + maxFraction * (p2 - p1) |
| b2RayCastOutput | |
| b2RevoluteJoint | |
| b2RevoluteJointDef | |
| b2Rope | |
| b2RopeDef | |
| b2RopeJoint | |
| b2RopeJointDef | |
| b2Rot | Rotation |
| b2Shape | |
| b2SimplexCache | |
| b2SlabAllocator | |
| b2SolverData | Solver Data |
| b2StackAllocator | |
| b2StackEntry | |
| b2StackQueue | |
| b2Stat | Calculates min/max/mean of a set of samples |
| b2Sweep | |
| b2Timer | |
| b2TimeStep | This is an internal structure |
| b2TOIInput | Input parameters for b2TimeOfImpact |
| b2TOIOutput | |
| b2TrackedBlock | Allocated block of memory that can be tracked in a b2IntrusiveList |
| b2TrackedBlockAllocator | Allocator of blocks which are tracked in a list |
| b2Transform | |
| b2TreeNode | A node in the dynamic tree. The client does not interact with this directly |
| b2TypedFreeList | |
| b2TypedIntrusiveListNode | |
| b2Vec2 | A 2D column vector |
| b2Vec3 | A 3D column vector with 3 elements |
| b2Vec4 | A 4D column vector with 4 elements |
| b2Velocity | This is an internal structure |
| b2VelocityConstraintPoint | |
| b2Version | |
 b2VoronoiDiagram | A field representing the nearest generator from each point |
  NodeCallback | Callback used by GetNodes() |
| b2WeldJoint | |
| b2WeldJointDef | |
| b2WheelJoint | |
| b2WheelJointDef | |
| b2World | |
| b2WorldManifold | This is used to compute the current state of a contact manifold |
| FindContactCheck | |
| FindContactInput | |
