whoosh animation when level up pending

vacuum_gambit.p8

@@ -157,6 +157,7 @@ function init_hpcols()
 end
 
 function wipe_level()
+ xpwhoosh = nil
  primary_ship = player.new()
  init_hpcols()
  pships = linked_list.new()
@@ -251,6 +252,17 @@ function updategame()
 	  state = win
 	end
 	if (not pships.next) state = lose
+
+ if primary_ship.xp >= primary_ship.xptarget then
+  if not xpwhoosh then
+   xpwhoosh = 0
+  else
+   xpwhoosh += 1
+   if (xpwhoosh > 60) xpwhoosh = 0
+  end
+ else
+  xpwhoosh = nil
+ end
 end
 
 function _draw()
@@ -346,8 +358,18 @@ function drawhud()
  print("XP",119,55,1)
  print("HP",114,122,1)
  fillp(0x5a5a)
- vertmeter(115,58,118,117,primary_ship.xp, primary_ship.xptarget, powcols)
- -- 59 px vertically
+ if xpwhoosh then
+  clip(115,58,4,60)
+  rectfill(115,58,118,117,0xaa)
+  local voff = 5*xpwhoosh+6
+  rectfill(115,118-voff,118,117-voff+10,0xbb)
+  rectfill(115,118-voff+11,118,117-voff+20,0xba)
+  clip()
+ else
+  vertmeter(115,58,118,117,primary_ship.xp, primary_ship.xptarget, powcols)
+ end
+ -- 59 px vertically? or 60? off-by-1 error somewhere here or in vertmeter?
+ -- it's here. I think
  local mxs, cs, mxh, ch = primary_ship.maxshield, primary_ship.shield, primary_ship.maxhp, primary_ship.hp
  if (mxs > 0) and (mxh > 0) then
   local split = 59 * (mxs / (mxs + mxh)) \ 1 + 64