1 files changed, 12 insertions, 1 deletions
diff --git a/yage/entity/system.h b/yage/entity/system.h
index b540555f..4f8306a8 100644
--- a/yage/entity/system.h
+++ b/yage/entity/system.h
@@ -1,10 +1,21 @@
+#pragma once
+
+#include "entity.h"
+
+namespace yage
+{
+
 class BaseSystem
 {
 public:
-    virtual void update() = 0;
+    virtual void update(double dt, EntityManager &em) = 0;
 };
 
 template <typename T>
 class System : public BaseSystem
 {
+protected:
+    ComponentMask active_mask_;
 };
+
+} // namespace yage