+
+ /* Diamond Caves has the same (strange) behaviour as Emerald Mine that gems
+ can slip down from flat walls, like normal walls and steel walls */
+ level->em_slippery_gems = TRUE;
+
+#if 0
+ /* Diamond Caves II levels are always surrounded by indestructible wall, but
+ not necessarily in a rectangular way -- fill with invisible steel wall */
+
+ /* !!! not always true !!! keep level and set BorderElement instead !!! */
+
+ for (y = 0; y < level->fieldy; y++) for (x = 0; x < level->fieldx; x++)
+ {
+#if 1
+ if ((x == 0 || x == level->fieldx - 1 ||
+ y == 0 || y == level->fieldy - 1) &&
+ level->field[x][y] == EL_EMPTY)
+ level->field[x][y] = EL_INVISIBLE_STEELWALL;
+#else
+ if ((x == 0 || x == level->fieldx - 1 ||
+ y == 0 || y == level->fieldy - 1) &&
+ level->field[x][y] == EL_EMPTY)
+ FloodFillLevel(x, y, EL_INVISIBLE_STEELWALL,
+ level->field, level->fieldx, level->fieldy);
+#endif
+ }
+#endif