// ReSharper disable once ParameterTypeCanBeEnumerable.Local
private void CreateSystems(List <TypeInfo> systemTypeInfos, int componentCount)
{
var systemAttributeType = typeof(EntitySystemAttribute);
var aspectAttributeType = typeof(AspectAttribute);
var andMask = new BitVector(componentCount);
var orMask = new BitVector(componentCount);
var norMask = new BitVector(componentCount);
foreach (var typeInfo in systemTypeInfos)
{
EntitySystemAttribute systemAttribute = null;
andMask.SetAll(false);
orMask.SetAll(false);
norMask.SetAll(false);
var attributes = typeInfo.GetCustomAttributes(false);
foreach (var attribute in attributes)
{
var attributeType = attribute.GetType();
if (attributeType == systemAttributeType)
{
systemAttribute = (EntitySystemAttribute)attribute;
}
if (attributeType != aspectAttributeType)
{
continue;
}
var aspectAttribute = (AspectAttribute)attribute;
switch (aspectAttribute.Type)
{
case AspectType.All:
EntityManager.FillComponentBits(andMask, aspectAttribute.Components);
break;
case AspectType.Any:
EntityManager.FillComponentBits(orMask, aspectAttribute.Components);
break;
case AspectType.None:
EntityManager.FillComponentBits(norMask, aspectAttribute.Components);
break;
default:
throw new ArgumentOutOfRangeException();
}
}
if (systemAttribute == null)
{
return;
}
var system = _dependencyResolver.Resolve <EntitySystem>(typeInfo.AsType());
var processingSystem = system as EntityProcessingSystem;
if (processingSystem != null)
{
processingSystem.Aspect = new Aspect(andMask, orMask, norMask);
}
_systemManager.AddSystem(system, systemAttribute.GameLoopType,
systemAttribute.Layer, SystemExecutionType.Synchronous);
}
}