Implements calling Lua.

src/iElement.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include "Frame.h"
+#include "Period.h"
+
+
+namespace gj {
+
+
+class iElement {
+ public:
+  iElement(iElement&&) = default;
+  iElement(const iElement&) = default;
+
+  iElement& operator=(iElement&&) = default;
+  iElement& operator=(const iElement&) = default;
+
+  iElement() = default;
+  virtual ~iElement() = default;
+
+  virtual void Update(Frame& f) = 0;
+
+  /* Interfaces had better not have a variable but this is for optimization. */
+  const Period period;
+};
+
+
+}