Use eship_collider for ship collisions, too.

vacuum_gambit.p8

@@ -238,14 +238,17 @@ function updategame()
   lst:strip(call_move)
  end
 
+	-- eship collider will be used
+ -- both for pship and pbullets.
+ local eship_collider = collider.new{from=eships}
+
  if not ps.dead then
   ps:move()
   local pbox = hurtbox(ps)
-  eships:strip(function(es)
+  for es in all(eship_collider:get_collisions(pbox)) do
-   if(not collides(pbox, hurtbox(es))) return
    ps:hitship(es)
-   return es:hitship(ps)
+   if(es:hitship(ps)) eship_collider:yoink(es)
-  end)
+  end
   ebullets:strip(function(eb)
    -- loopify this when split moves implemented
    eb:move()
@@ -257,12 +260,8 @@ function updategame()
   ebullets:strip(call_move)
  end
 
-	-- many bullets and many enemy ships;
-	-- use bucket collider for efficiency
- local eship_collider = collider.new{from=eships}
-
  pbullets:strip(function(pb)
-  for es in all(eship_collider:get_collisions(pb)) do
+  for es in all(eship_collider:get_collisions(hurtbox(pb))) do
    if (es:hitbullet(pb)) eship_collider:yoink(es)
    if (pb:hitship(es)) return true
   end
@@ -1469,10 +1468,9 @@ function collider:yoink(item)
  end
 end
 
-function collider:get_collisions(item)
+function collider:get_collisions(box)
  local found = { }
  local seen = { }
- local box = hurtbox(item)
  local bucket_ids = collider_indexes(box)
  for b_idx in all(bucket_ids) do
   local bucket = self[b_idx]