--- deliantra/server/common/map.C	2011/05/04 16:12:15	1.206
+++ deliantra/server/common/map.C	2011/05/08 21:51:26	1.216
@@ -371,6 +371,8 @@
       op->activate_recursive ();
 
   state = MAP_ACTIVE;
+
+  activate_physics ();
 }
 
 void
@@ -543,7 +545,7 @@
           current_type = get_typedata_by_name (p);
           if (current_type)
             {
-              items[i].name = current_type->name;
+              items[i].name    = current_type->name;
               items[i].typenum = current_type->number;
               items[i].name_pl = current_type->name_pl;
             }
@@ -671,12 +673,12 @@
           case KW_invisible:   case KW_darkness:        thawer.get (darkness); break;
           case KW_stand_still: case KW_fixed_resettime: thawer.get (fixed_resettime); break;
 
-          case KW_tile_path_1: thawer.get (tile_path [0]); break;
-          case KW_tile_path_2: thawer.get (tile_path [1]); break;
-          case KW_tile_path_3: thawer.get (tile_path [2]); break;
-          case KW_tile_path_4: thawer.get (tile_path [3]); break;
-          case KW_tile_path_5: thawer.get (tile_path [4]); break;
-          case KW_tile_path_6: thawer.get (tile_path [5]); break;
+          case KW_tile_path_1: thawer.get (tile_path [TILE_NORTH]); break;
+          case KW_tile_path_2: thawer.get (tile_path [TILE_EAST ]); break;
+          case KW_tile_path_3: thawer.get (tile_path [TILE_SOUTH]); break;
+          case KW_tile_path_4: thawer.get (tile_path [TILE_WEST ]); break;
+          case KW_tile_path_5: thawer.get (tile_path [TILE_UP   ]); break;
+          case KW_tile_path_6: thawer.get (tile_path [TILE_DOWN ]); break;
 
           case KW_ERROR:
             set_key_text (thawer.kw_str, thawer.value);
@@ -765,12 +767,12 @@
   MAP_OUT (per_player);
   MAP_OUT (per_party);
 
-  if (tile_path [0]) MAP_OUT2 (tile_path_1, tile_path [0]);
-  if (tile_path [1]) MAP_OUT2 (tile_path_2, tile_path [1]);
-  if (tile_path [2]) MAP_OUT2 (tile_path_3, tile_path [2]);
-  if (tile_path [3]) MAP_OUT2 (tile_path_4, tile_path [3]);
-  if (tile_path [4]) MAP_OUT2 (tile_path_5, tile_path [4]);
-  if (tile_path [5]) MAP_OUT2 (tile_path_6, tile_path [5]);
+  if (tile_path [TILE_NORTH]) MAP_OUT2 (tile_path_1, tile_path [TILE_NORTH]);
+  if (tile_path [TILE_EAST ]) MAP_OUT2 (tile_path_2, tile_path [TILE_EAST ]);
+  if (tile_path [TILE_SOUTH]) MAP_OUT2 (tile_path_3, tile_path [TILE_SOUTH]);
+  if (tile_path [TILE_WEST ]) MAP_OUT2 (tile_path_4, tile_path [TILE_WEST ]);
+  if (tile_path [TILE_UP   ]) MAP_OUT2 (tile_path_5, tile_path [TILE_UP   ]);
+  if (tile_path [TILE_DOWN ]) MAP_OUT2 (tile_path_6, tile_path [TILE_DOWN ]);
 
   freezer.put (this);
   freezer.put (KW(end));
@@ -837,7 +839,7 @@
   shoprace = 0;
   delete [] shopitems, shopitems = 0;
 
-  for (int i = 0; i < TILE_NUM; i++)
+  for (int i = 0; i < array_length (tile_path); i++)
     tile_path [i] = 0;
 }
 
@@ -854,7 +856,7 @@
    * tiling can be asymetric, we just can not look to see which
    * maps this map tiles with and clears those.
    */
-  for (int i = 0; i < TILE_NUM; i++)
+  for (int i = 0; i < array_length (tile_path); i++)
     if (tile_map[i] == m)
       tile_map[i] = 0;
 }
@@ -1195,6 +1197,29 @@
   if (top == middle)
     middle = 0;
 
+  // set lower map transparent floor flag if applicable
+  if (floor && floor->flag [FLAG_IS_TRANSPARENT_FLOOR] && !middle && !top)
+    {
+      floor->set_anim_frame (0);
+
+      if (maptile *m = floor->map->tile_map [TILE_DOWN])
+        {
+          mapspace &ms = m->at (floor->x, floor->y);
+          ms.update ();
+
+          if (object *floor2 = ms.faces_obj [2])
+            if (!floor2->flag [FLAG_IS_TRANSPARENT_FLOOR])
+              {
+                floor->set_anim_frame (1);
+                top = floor;
+                middle = ms.faces_obj [0];
+                floor = floor2;
+              }
+
+          ms.pflags |= PF_VIS_UP;
+        }
+    }
+
 #if 0
   faces_obj [0] = top;
   faces_obj [1] = middle;
@@ -1202,18 +1227,63 @@
 #endif
 }
 
+void
+mapspace::update_up ()
+{
+  // invalidate up
+  if (!(pflags & PF_VIS_UP))
+    return;
+
+  pflags &= ~PF_VIS_UP;
+
+  if (bot)
+    if (maptile *m = bot->map->tile_map [TILE_UP])
+      m->at (bot->x, bot->y).invalidate ();
+}
+
 maptile *
 maptile::tile_available (int dir, bool load)
 {
-  if (tile_path[dir])
-    {
-      // map is there and we don't need to load it OR it's loaded => return what we have
-      if (tile_map[dir] && (!load || tile_map[dir]->linkable ()))
-        return tile_map[dir];
+  // map is there and we don't need to load it OR it's loaded => return what we have
+  if (tile_map [dir] && (!load || tile_map [dir]->linkable ()))
+    return tile_map [dir];
 
+  if (tile_path [dir])
+    {
       // well, try to locate it then, if possible - maybe it's there already
-      if ((tile_map[dir] = find_async (tile_path[dir], this, load)))
-        return tile_map[dir];
+      // this is the ONLY place in the server that links maps with each other,
+      // so any kind of inter-map stuff has to be initiated here.
+      if (maptile *m = find_async (tile_path [dir], this, load))
+        {
+          bool mismatch = false;
+
+          if (dir == TILE_NORTH || dir == TILE_SOUTH || dir == TILE_UP || dir == TILE_DOWN)
+            if (width != m->width)
+              mismatch = true;
+
+          if (dir == TILE_EAST  || dir == TILE_WEST  || dir == TILE_UP || dir == TILE_DOWN)
+            if (height != m->height)
+              mismatch = true;
+
+          if (mismatch)
+            {
+              LOG (llevError, "tile dimension mismatch for direction %d from %s to %s\n",
+                   dir, &path, &m->path);
+              m = 0;
+            }
+          else if (0)//D
+            {
+              // as an optimisation, link us against the other map if the other map
+              // has us as neighbour, which is very common, but not guaranteed.
+              int dir2 = REVERSE_TILE_DIR (dir);
+
+              if (m->tile_path [dir2] == path)
+                m->tile_map [dir2] = this;
+            }
+
+
+          return tile_map [dir] = m;
+        }
     }
 
   return 0;
@@ -1239,34 +1309,34 @@
 
   if (x < 0)
     {
-      if (!m->tile_available (3))
+      if (!m->tile_available (TILE_WEST))
         return 1;
 
-      return out_of_map (m->tile_map[3], x + m->tile_map[3]->width, y);
+      return out_of_map (m->tile_map [TILE_WEST], x + m->tile_map [TILE_WEST]->width, y);
     }
 
   if (x >= m->width)
     {
-      if (!m->tile_available (1))
+      if (!m->tile_available (TILE_EAST))
         return 1;
 
-      return out_of_map (m->tile_map[1], x - m->width, y);
+      return out_of_map (m->tile_map [TILE_EAST], x - m->width, y);
     }
 
   if (y < 0)
     {
-      if (!m->tile_available (0))
+      if (!m->tile_available (TILE_NORTH))
         return 1;
 
-      return out_of_map (m->tile_map[0], x, y + m->tile_map[0]->height);
+      return out_of_map (m->tile_map [TILE_NORTH], x, y + m->tile_map [TILE_NORTH]->height);
     }
 
   if (y >= m->height)
     {
-      if (!m->tile_available (2))
+      if (!m->tile_available (TILE_SOUTH))
         return 1;
 
-      return out_of_map (m->tile_map[2], x, y - m->height);
+      return out_of_map (m->tile_map [TILE_SOUTH], x, y - m->height);
     }
 
   /* Simple case - coordinates are within this local
@@ -1288,38 +1358,38 @@
 {
   if (x < 0)
     {
-      if (!tile_available (3))
+      if (!tile_available (TILE_WEST))
         return 0;
 
-      x += tile_map[3]->width;
-      return tile_map[3]->xy_find (x, y);
+      x += tile_map [TILE_WEST]->width;
+      return tile_map [TILE_WEST]->xy_find (x, y);
     }
 
   if (x >= width)
     {
-      if (!tile_available (1))
+      if (!tile_available (TILE_EAST))
         return 0;
 
       x -= width;
-      return tile_map[1]->xy_find (x, y);
+      return tile_map [TILE_EAST]->xy_find (x, y);
     }
 
   if (y < 0)
     {
-      if (!tile_available (0))
+      if (!tile_available (TILE_NORTH))
         return 0;
 
-      y += tile_map[0]->height;
-      return tile_map[0]->xy_find (x, y);
+      y += tile_map [TILE_NORTH]->height;
+      return tile_map [TILE_NORTH]->xy_find (x, y);
     }
 
   if (y >= height)
     {
-      if (!tile_available (2))
+      if (!tile_available (TILE_SOUTH))
         return 0;
 
       y -= height;
-      return tile_map[2]->xy_find (x, y);
+      return tile_map [TILE_SOUTH]->xy_find (x, y);
     }
 
   /* Simple case - coordinates are within this local
@@ -1660,31 +1730,31 @@
       if (maptile *tile = m->tile_available (TILE_EAST, 1))
         split_to_tiles (buf, tile, max (x0 - m->width, 0), y0, x1 - m->width, y1, dx + m->width, dy);
 
-      if (x0 > m->width) // entirely to the right
+      if (x0 >= m->width) // entirely to the right
         return;
 
       x1 = m->width;
     }
 
-  // clip to map above
+  // clip to map to the north
   if (y0 < 0)
     {
       if (maptile *tile = m->tile_available (TILE_NORTH, 1))
         split_to_tiles (buf, tile, x0, y0 + tile->height, x1, min (y1 + tile->height, tile->height), dx, dy - tile->height);
 
-      if (y1 < 0) // entirely above
+      if (y1 < 0) // entirely to the north
         return;
 
       y0 = 0;
     }
 
-  // clip to map below
+  // clip to map to the south
   if (y1 > m->height)
     {
       if (maptile *tile = m->tile_available (TILE_SOUTH, 1))
         split_to_tiles (buf, tile, x0, max (y0 - m->height, 0), x1, y1 - m->height, dx, dy + m->height);
 
-      if (y0 > m->height) // entirely below
+      if (y0 >= m->height) // entirely to the south
         return;
 
       y1 = m->height;