public void RemoveComponentFromEntity(Entity e, int componentTypeId)
{
int oldComponentTypesBitField = e.ComponentTypesBitField;
// (1) update componentlookupids, and return component to pool
#if ALTERNATE_LAYOUT
int iIndex = e.LiveId + componentTypeId * MaxEntities;
#else
int iIndex = e.LiveId * EntityManager.MaxComponentTypes + componentTypeId;
#endif
int componentLookupId = componentLookupIdsPerEntity[iIndex];
if (componentLookupId != -1)
{
componentManagers[componentTypeId].FreeAtComponentLookupId(componentLookupId);
componentLookupIdsPerEntity[iIndex] = -1;
}
else
{
Debug.Assert(false, "removing non-existent component. Is this ok?");
}
// (2) update e.ComponentTypesBitField by removing the bit for the removed component type.
e.ComponentTypesBitField &= ~ComponentTypeIdHelper.GetBit(componentTypeId);
// (3) Ensure its removed from the appropriate systems
UpdateEntityInSystems(e, oldComponentTypesBitField);
}
public EntitySystem(int updateOrder, int[] requiredComponentTypeIds, int[] optionalButOneRequiredComponentTypeIds, uint[] supportedMessages = null, SystemFlags flags = SystemFlags.None)
{
Flags = flags;
UpdateOrder = updateOrder;
enabled = true;
foreach (int componentTypeId in requiredComponentTypeIds)
{
RequiredComponentTypesBitField |= ComponentTypeIdHelper.GetBit(componentTypeId);
}
if (optionalButOneRequiredComponentTypeIds == null)
{
RequireAtLeastOneComponentTypesBitField = ComponentTypeIdHelper.AllMask;
}
else
{
foreach (int componentTypeId in optionalButOneRequiredComponentTypeIds)
{
RequireAtLeastOneComponentTypesBitField |= ComponentTypeIdHelper.GetBit(componentTypeId);
}
}
liveIdToSlot = new int[EntityManager.MaxEntities];
slotToLiveId = new int[EntityManager.MaxEntities];
for (int i = 0; i < liveIdToSlot.Length; i++)
{
liveIdToSlot[i] = -1;
slotToLiveId[i] = -1;
}
this.SupportedMessages = supportedMessages;
entityIdCollection = new EntityIdCollection(this);
}
// This shouldn't be public, since it doesn't do proper add/remove from systems.
private Component GetOrAllocateComponentAndUpdateBitField(Entity e, int componentTypeId, out bool allocatedNew)
{
//int liveIndex = liveIdRoster[e.LiveId];
int liveIndex = e.LiveId;
Debug.Assert(e == entityPool[liveIndex], "Entity has wrong id");
ComponentManagerBase componentManager = componentManagers[componentTypeId];
#if ALTERNATE_LAYOUT
int index = liveIndex + componentTypeId * MaxEntities;
#else
int index = liveIndex * EntityManager.MaxComponentTypes + componentTypeId;
#endif
int componentTypeLookupId = componentLookupIdsPerEntity[index];
if (componentTypeLookupId == -1)
{
// Allocate a new component for this entity
short componentLookupId;
Component component = componentManager.AllocateComponentForEntity(e, out componentLookupId);
componentLookupIdsPerEntity[index] = componentLookupId;
allocatedNew = true;
// Make sure the entity is tagged as having this component
e.ComponentTypesBitField |= ComponentTypeIdHelper.GetBit(componentTypeId);
return(component);
}
else
{
// Retrieve
allocatedNew = false;
return(componentManager.GetComponentAt(componentTypeLookupId));
}
}
