/* Unknown grid (not detected) */
FEAT_IDX feat_undetected;
+FEAT_IDX feat_wall_outer;
+FEAT_IDX feat_wall_inner;
+FEAT_IDX feat_wall_solid;
+FEAT_IDX feat_ground_type[100], feat_wall_type[100];
+
+/*
+ * Maximum number of terrain features in f_info.txt
+ */
+FEAT_IDX max_f_idx;
+
/*!
* @brief 地形が罠持ちであるかの判定を行う。 / Return TRUE if the given feature is a trap
* @param feat 地形情報のID