/// <summary>
/// Registers component type as one-frame for auto-removing at end of Run() call.
/// </summary>
public EcsSystems OneFrame <T> () where T : struct
{
#if DEBUG
if (_inited)
{
throw new Exception("Cant register one-frame after initialization.");
}
if (_oneFrames.ContainsKey(typeof(T)))
{
throw new Exception($"\"{typeof (T).Name}\" already registered as one-frame component.");
}
#endif
_oneFrames[typeof(T)] = World.GetFilter(typeof(EcsFilter <T>));
return(this);
}
/// <summary>
/// Injects custom data to fields of ISystem instance.
/// </summary>
/// <param name="system">ISystem instance.</param>
/// <param name="world">EcsWorld instance.</param>
/// <param name="injections">Additional instances for injection.</param>
public static void InjectDataToSystem(IEcsSystem system, EcsWorld world, Dictionary <Type, object> injections)
{
var systemType = system.GetType();
var worldType = world.GetType();
var filterType = typeof(EcsFilter);
var ignoreType = typeof(EcsIgnoreInjectAttribute);
foreach (var f in systemType.GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance))
{
// skip statics or fields with [EcsIgnoreInject] attribute.
if (f.IsStatic || Attribute.IsDefined(f, ignoreType))
{
continue;
}
// EcsWorld
if (f.FieldType.IsAssignableFrom(worldType))
{
f.SetValue(system, world);
continue;
}
// EcsFilter
#if DEBUG
if (f.FieldType == filterType)
{
throw new Exception($"Cant use EcsFilter type at \"{system}\" system for dependency injection, use generic version instead");
}
#endif
if (f.FieldType.IsSubclassOf(filterType))
{
f.SetValue(system, world.GetFilter(f.FieldType));
continue;
}
// Other injections.
foreach (var pair in injections)
{
if (f.FieldType.IsAssignableFrom(pair.Key))
{
f.SetValue(system, pair.Value);
break;
}
}
}
}
