updatePairs method

@override void updatePairs(PairCallback callback)

Update the pairs. This results in pair callbacks. This can only add pairs.

Implementation

@override
void updatePairs(PairCallback callback) {
  // Reset pair buffer
  _pairBuffer.clear();

  // Perform tree queries for all moving proxies.
  for (final proxyId in _moveBuffer) {
    _queryProxyId = proxyId;
    if (proxyId == BroadPhase.nullProxy) {
      continue;
    }

    // We have to query the tree with the fat AABB so that
    // we don't fail to create a pair that may touch later.
    final fatAABB = _tree.fatAABB(proxyId);

    // Query tree, create pairs and add them pair buffer.
    _tree.query(this, fatAABB);
  }

  // Reset move buffer
  _moveBuffer.clear();

  // Send the pairs back to the client.
  for (final pair in _pairBuffer) {
    final userDataA = _tree.userData(pair.proxyIdA);
    final userDataB = _tree.userData(pair.proxyIdB);

    callback.addPair(userDataA, userDataB);
  }
}