update comment about off-by-1 error

I foresee the 32K limit being a bigger problem than the math in vertmeter, although I will probably need to go patch vertmeter up too

vacuum_gambit.p8

@@ -378,8 +378,10 @@ function drawhud()
  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
+ -- 60 px vertically. note that
+ -- there was at one point an
+ -- off-by-one and I'm not sure
+ -- it's actually fixed
  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
@@ -485,14 +487,15 @@ function ship_m:die()
  local sz4 = self.size * 4
  local cx, cy, xp, z = self.x + sz4, self.y + sz4, self.xp or 0, 0
  boom(cx, cy, 3*sz4, self.boss)
- if xp > 499 then
+ if xp > 0x0.01f3 then  -- dec 499
   -- spawn a huge gem with all
   -- overage XP, min 100
-  spawn_xp_at(cx, cy, 0, xp-399)
-  xp = 399
+  spawn_xp_at(cx, cy, 0, xp-0x0.18f)
+  xp = 0x0.18f  -- dec 399
   z += 1
  end
- for gsz in all{100, 25, 5, 1} do
+ -- 100, 25, 5, 1
+ for gsz in all{0x0.0064, 0x0.0019, 0x0.0005, 0x0.0001} do
   while xp >= gsz do
    spawn_xp_at(cx, cy, z, gsz)
    xp -= gsz
@@ -950,9 +953,9 @@ player = mknew(ship_m.new{
  shield = 2, -- regenerates
  maxshield = 2,
 
- -- xp; watch out for 16-bit range limits
+ -- xp in increments of 0x0.0001
  xp = 0,
- xptarget = 4,
+ xptarget = 0x0.0004,
  level = 1,
 
  -- gun
@@ -1010,7 +1013,7 @@ frownie = mknew(ship_m.new{
  sparkodds = 8,
  
  hp = 0.5, -- enemy ships need no max hp
- xp = 1,
+ xp = 0x0.0001,
 
  -- position
  x=60, -- x and y are for upper left corner
@@ -1032,7 +1035,7 @@ frownie = mknew(ship_m.new{
 blocky = mknew(frownie.new{
  sprite = 10,
  hp = 1.5,
- xp = 2,
+ xp = 0x0.0002,
  hurt = {
   x_off = 0,
   y_off = 0,
@@ -1052,7 +1055,7 @@ blocky = mknew(frownie.new{
 
 spewy = mknew(frownie.new{
  sprite=26,
- xp = 3,
+ xp = 0x0.0003,
  hurt = {
   x_off=0,
   y_off=1,
@@ -1073,7 +1076,7 @@ spewy = mknew(frownie.new{
 
 chasey = mknew(ship_m.new{
  sprite = 5,
- xp = 4,
+ xp = 0x0.0004,
  size = 1,
  hurt = {
   x_off = 1,
@@ -1108,7 +1111,7 @@ end
 
 xl_chasey=mknew(chasey.new{
  size=2,
- xp = 10,
+ xp = 0x0.000a,
  maxspd=1.25,
  hurt = {
   x_off = 2,
@@ -1606,7 +1609,7 @@ function spawn_xp_at(x, y, off, amt)
  x += rnd(off+off)-off
  y += rnd(off+off)-off
  xp_gem.new{
-  qsprite=amt == 1 and 32 or amt == 5 and 33 or amt == 25 and 34 or 35,
+  qsprite=amt == 0x0.0001 and 32 or amt == 0x0.0005 and 33 or amt == 0x0.0019 and 34 or 35,
   val = amt,
  }:spawn_at(mid(x, 0, 124),mid(y,-4,125))
 end