-u8 getFaceLight(u32 daynight_ratio, MapNode n, MapNode n2,
- v3s16 face_dir);
-
-/*
- MapBlock itself
-*/
-
-class MapBlock : public NodeContainer
+////
+//// MapBlock modified reason flags
+////
+
+#define MOD_REASON_INITIAL (1 << 0)
+#define MOD_REASON_REALLOCATE (1 << 1)
+#define MOD_REASON_SET_IS_UNDERGROUND (1 << 2)
+#define MOD_REASON_SET_LIGHTING_COMPLETE (1 << 3)
+#define MOD_REASON_SET_GENERATED (1 << 4)
+#define MOD_REASON_SET_NODE (1 << 5)
+#define MOD_REASON_SET_NODE_NO_CHECK (1 << 6)
+#define MOD_REASON_SET_TIMESTAMP (1 << 7)
+#define MOD_REASON_REPORT_META_CHANGE (1 << 8)
+#define MOD_REASON_CLEAR_ALL_OBJECTS (1 << 9)
+#define MOD_REASON_BLOCK_EXPIRED (1 << 10)
+#define MOD_REASON_ADD_ACTIVE_OBJECT_RAW (1 << 11)
+#define MOD_REASON_REMOVE_OBJECTS_REMOVE (1 << 12)
+#define MOD_REASON_REMOVE_OBJECTS_DEACTIVATE (1 << 13)
+#define MOD_REASON_TOO_MANY_OBJECTS (1 << 14)
+#define MOD_REASON_STATIC_DATA_ADDED (1 << 15)
+#define MOD_REASON_STATIC_DATA_REMOVED (1 << 16)
+#define MOD_REASON_STATIC_DATA_CHANGED (1 << 17)
+#define MOD_REASON_EXPIRE_DAYNIGHTDIFF (1 << 18)
+#define MOD_REASON_UNKNOWN (1 << 19)
+
+////
+//// MapBlock itself
+////
+
+class MapBlock /*: public NodeContainer*/