/// <summary>Initializes a new instance of the <see cref="SystemManager" /> class.</summary>
/// <param name="entityWorld">The entity world.</param>
internal SystemManager(EntityWorld entityWorld)
{
this.mergedBag = new Bag <EntitySystem>();
#if FULLDOTNET
this.drawLayers = new SortedDictionary <int, SystemLayer>();
this.updateLayers = new SortedDictionary <int, SystemLayer>();
#else
this.drawLayers = new Dictionary <int, SystemLayer>();
this.updateLayers = new Dictionary <int, SystemLayer>();
#endif
this.systemBitManager = new SystemBitManager();
this.systems = new Dictionary <Type, IList>();
this.entityWorld = entityWorld;
}
/// <summary>Sets the system.</summary>
/// <param name="systemType">Type of the system.</param>
/// <param name="system">The system.</param>
/// <param name="gameLoopType">Type of the game loop.</param>
/// <param name="layer">The layer.</param>
/// <param name="executionType">Type of the execution.</param>
/// <returns>The EntitySystem.</returns>
private EntitySystem SetSystem(Type systemType, EntitySystem system, GameLoopType gameLoopType, int layer = 0, ExecutionType executionType = ExecutionType.Synchronous)
{
system.EntityWorld = this.entityWorld;
if (this.systems.ContainsKey(systemType))
{
this.systems[systemType].Add(system);
}
else
{
Type genericType = typeof(List <>);
Type listType = genericType.MakeGenericType(systemType);
this.systems[systemType] = (IList)Activator.CreateInstance(listType);
this.systems[systemType].Add(system);
}
switch (gameLoopType)
{
case GameLoopType.Draw:
{
SetSystem(ref this.drawLayers, system, layer, executionType);
}
break;
case GameLoopType.Update:
{
SetSystem(ref this.updateLayers, system, layer, executionType);
}
break;
}
if (!this.mergedBag.Contains(system))
{
this.mergedBag.Add(system);
}
system.SystemBit = SystemBitManager.GetBitFor(system);
return(system);
}