protected Subsystem(World theWorld)
{
World = theWorld;
World.EntityManager.RegisterSubsystem(this);
ComponentMask = new BitSet();
RelevantEntities = new List<uint> ();
_entitiesToAdd = new List<uint>();
_entitiesToRemove = new List<uint>();
}
/// <summary>
/// Determines whether all of the bits in this instance are also set in the given bitset.
/// </summary>
/// <param name="other">The bitset to check.</param>
/// <returns><c>true</c> if all of the bits in this instance are set in <paramref name="other"/>; otherwise, <c>false</c>.</returns>
public bool IsSubsetOf(BitSet other)
{
if (other == null)
throw new ArgumentNullException("other");
var otherBits = other.bits;
int count = Math.Min(bits.Length, otherBits.Length);
for (int i = 0; i < count; i++)
{
uint bit = bits[i];
if ((bit & otherBits[i]) != bit)
return false;
}
// handle extra bits on our side that might just be all zero
int extra = bits.Length - count;
for (int i = count; i < extra; i++)
{
if (bits[i] != 0)
return false;
}
return true;
}