import org.jbox2d.collision.broadphase.BroadPhaseStrategy; //导入依赖的package包/类
public ContactManager(World argPool, BroadPhaseStrategy strategy) {
  m_contactList = null;
  m_contactCount = 0;
  m_contactFilter = new ContactFilter();
  m_contactListener = null;
  m_broadPhase = new BroadPhase(strategy);
  pool = argPool;
}
 

import org.jbox2d.collision.broadphase.BroadPhaseStrategy; //导入依赖的package包/类
public World(Vector2 gravity, IWorldPool argPool, BroadPhaseStrategy broadPhaseStrategy) {
  pool = argPool;
  m_destructionListener = null;
  m_debugDraw = null;

  m_bodyList = null;
  m_jointList = null;

  m_bodyCount = 0;
  m_jointCount = 0;

  m_warmStarting = true;
  m_continuousPhysics = true;
  m_subStepping = false;
  m_stepComplete = true;

  m_allowSleep = true;
  m_gravity.set(gravity);

  m_flags = CLEAR_FORCES;

  m_inv_dt0 = 0f;

  m_contactManager = new ContactManager(this, broadPhaseStrategy);
  m_profile = new Profile();

  initializeRegisters();
}
 

import org.jbox2d.collision.broadphase.BroadPhaseStrategy; //导入依赖的package包/类
public World(Vec2 gravity, IWorldPool pool, BroadPhaseStrategy strategy) {
  this(gravity, pool, new DefaultBroadPhaseBuffer(strategy));
}
 

import org.jbox2d.collision.broadphase.BroadPhaseStrategy; //导入依赖的package包/类
public ParticleWorld(Vec2 gravity, IWorldPool pool, BroadPhaseStrategy strategy) {
	super(gravity, pool, new DefaultBroadPhaseBuffer(strategy));
}