Properly count entities and sure we support enough

This accounts:

- entities on the map
- entities that will be spawn to unlock doors
- the time monster

1 files changed, 7 insertions, 2 deletions

diff --git a/tools/map.py b/tools/map.py
index c959c50..8ead427 100755
--- a/tools/map.py
+++ b/tools/map.py
@@ -23,6 +23,9 @@ entity_types = (
     "SilverKey",
 )
 
+# these tiles are part of a door and will use an entity to unlock
+tiles_to_entity = (45, 47)
+
 
 def get_layer(data, name):
     for layer in data["layers"]:
@@ -72,6 +75,7 @@ def main():
     map_layer = get_layer(data, "Map")
 
     out = list(map(lambda x: (x - tileset["firstgid"]) & 0xFF, map_layer["data"]))
+    door_cnt = sum(map(lambda x: 1 if x in tiles_to_entity else 0, out))
 
     gold_layer = get_layer(data, "Gold")
 
@@ -90,8 +94,9 @@ def main():
     # should help the drawing order in the game
     objs_sorted = sorted(entity_layer["objects"], key=lambda o: o["y"])
 
-    if args.max_ents and len(objs_sorted) > args.max_ents:
-        parser.error("Too many entities (limit: %s)" % args.max_ents)
+    total_ents = len(objs_sorted) + door_cnt
+    if args.max_ents and total_ents > args.max_ents:
+        parser.error("Too many entities %d (limit: %s)" % (total_ents, args.max_ents))
 
     for ent in objs_sorted:
         try: