/// Update the pairs. This results in pair callbacks. This can only add pairs.
public void UpdatePairs(ContactManager callback)
{
// Reset pair buffer
_pairCount = 0;
// Perform tree queries for all moving proxies.
for (int i = 0; i < _moveCount; ++i)
{
_queryProxyId = _moveBuffer[i];
if (_queryProxyId == 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.
AABB fatAABB = _tree.GetFatAABB(_queryProxyId);
// Query tree, create pairs and add them pair buffer.
_tree.Query(this, fatAABB);
}
// Reset move buffer
_moveCount = 0;
// Sort the pair buffer to expose duplicates.
Array.Sort(_pairBuffer, 0, _pairCount, _comparer);
// Send the pairs back to the client.
int j = 0;
while (j < _pairCount)
{
Pair primaryPair = _pairBuffer[j];
object userDataA = _tree.GetUserData(primaryPair.proxyIdA);
object userDataB = _tree.GetUserData(primaryPair.proxyIdB);
callback.AddPair(userDataA, userDataB);
++j;
// Skip any duplicate pairs.
while (j < _pairCount)
{
Pair pair = _pairBuffer[j];
if (pair.proxyIdA != primaryPair.proxyIdA || pair.proxyIdB != primaryPair.proxyIdB)
{
break;
}
++j;
}
}
}
