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-rw-r--r--yage/entity/system.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/yage/entity/system.h b/yage/entity/system.h
index 15845390..0ca50009 100644
--- a/yage/entity/system.h
+++ b/yage/entity/system.h
@@ -19,7 +19,8 @@ namespace yage
class System : public NonCopyable
{
public:
-
+ virtual void init() = 0;
+ virtual void update() = 0;
};
} // namespace yage