/// <summary>
/// Synchronizes the contact set collections with self-overlaps in the spatial partition.
/// </summary>
private void Synchronize()
{
var overlaps = SpatialPartition.GetOverlaps();
// We know that SAP uses a HashSet. If possible use a HashSet in foreach to
// avoid allocating an enumerator on the heap.
var overlapsHashSet = overlaps as HashSet <Pair <CollisionObject> >;
if (overlapsHashSet != null)
{
// Use struct Enumerator of HashSet.
foreach (var overlap in overlapsHashSet)
{
CandidatePairs.AddOrMarkAsUsed(overlap);
}
}
else
{
// Use IEnumerator<T>.
foreach (var overlap in overlaps)
{
CandidatePairs.AddOrMarkAsUsed(overlap);
}
}
CandidatePairs.RemoveUnused(_obsoleteContactSetList);
Debug.Assert(overlaps.Count() == CandidatePairs.Count);
}
void IBroadPhase <CollisionObject> .RemoveUnused()
{
CandidatePairs.RemoveUnused(_obsoleteContactSetList);
}