public bool Remove(Entity entity)
{
int dataIndex = IndexOf(entity);
if (dataIndex == -1)
{
return(false);
}
// Mark the mapping as invalid so the entity can no longer be
// queried directly.
//
_mapping[EntityUtil.DecomposeIndex(entity)] = int.MaxValue;
// Update mapping for the last component which is going to be moved into
// the removed location.
//
int newMappingIndex = EntityUtil.DecomposeIndex(_entities[_entities.Count - 1]);
_mapping[newMappingIndex] = dataIndex;
// Move the component and entity information into the removed index.
//
_entities[dataIndex] = _entities[_entities.Count - 1];
_data[dataIndex] = _data[_data.Count - 1];
// Pop the final component.
//
_entities.RemoveAt(_entities.Count - 1);
_data.RemoveAt(_data.Count - 1);
return(true);
}
public int IndexOf(Entity entity)
{
int mappingIndex = EntityUtil.DecomposeIndex(entity);
if (mappingIndex < 0 || mappingIndex >= _mapping.Count)
{
return(-1);
}
int dataIndex = _mapping[mappingIndex];
if (dataIndex >= _entities.Count)
{
return(-1);
}
return(_entities[dataIndex] == entity ? dataIndex : -1);
}