fix compile errors after previous commit (which involved reimplementing the quad tree to eliminate the possibility of a class of bugs I was experiencing; the problem was that the quad bounds were being passed recursively in different functions, but the long argument list in these functions made it difficult to see where the mismatch was)

fcore/enemy.sml

@@ -4,8 +4,7 @@ struct
 
   fun withDefaultYAxis (enemy: enemy) =
     case #yAxis enemy of
-      ON_GROUND =>
-        EnemyPatch.withPatch (enemy, EnemyPatch.W_Y_AXIS FALLING)
+      ON_GROUND => EnemyPatch.withPatch (enemy, EnemyPatch.W_Y_AXIS FALLING)
     | _ => enemy
 
   fun helpExists (pos, id, collisions) =
@@ -35,8 +34,8 @@ struct
 
       val size = Constants.enemySize
 
-      val hasCollision = QuadHelp.hasCollisionAt
-        (x, y, size, size, projectileTree)
+      val hasCollision = QuadTree.hasCollisionAt
+        (x, y, size, size, ~1, projectileTree)
     in
       if hasCollision then
         if health = 1 then
@@ -181,12 +180,17 @@ struct
 
         val size = Constants.enemySize
 
-        val acc = QuadHelp.insert (x, y, size, size, id, acc)
+        val acc = QuadTree.insert (x, y, size, size, id, acc)
       in
         helpGenerateTree (pos + 1, enemyVec, acc)
       end
 
-  fun generateTree enemyVec = helpGenerateTree (0, enemyVec, QuadTree.empty)
+  fun generateTree enemyVec =
+    helpGenerateTree
+      ( 0
+      , enemyVec
+      , QuadTree.create (Constants.worldWidth, Constants.worldHeight)
+      )
 
   fun helpFind (findNum, vec: enemy vector, low, high) =
     (* should only be called when we know enemy already exists in vec *)