very silly shot pattern

fix hpcols_init
note that I need to re-call this whenever I have a new max hp also note that vertmeter does not handle 1024 correctly. find out what max hp functions and hardcap it
2025-06-28 23:11:27 -07:00 · 2025-06-28 23:10:57 -07:00 · 2025-06-28 22:59:51 -07:00 · 2025-06-28 22:49:10 -07:00 · 2025-06-28 22:35:36 -07:00 · 2025-06-24 23:16:47 -07:00
3 changed files with 1110 additions and 192 deletions
--- a/arrays_profiling.p8
+++ b/arrays_profiling.p8
@ -0,0 +1,504 @@
+pico-8 cartridge // http://www.pico-8.com
+version 42
+__lua__
+-- prof: cpu cycle counter v1.4
+--  BY PANCELOR
+--[[------------------------
+
+
+use this cart to precisely
+measure code execution time
+
+--------------------------------
+         ★ overview ★
+--------------------------------
+| tab 0 | usage guide          |
+| tab 1 | (internals)          |
+| tab 2 | your code here       |
+--------------------------------
+
+
+-----------------------
+-- ★ usage guide ★ --
+-----------------------
+
+
+웃: i have two code snippets;
+    which one is faster?
+
+🐱: edit the last tab with your
+    snippets, then run the cart.
+    it will tell you precisely
+    how much cpu it takes to
+    run each snippet.
+
+    the results are also copied
+    to your clipboard.
+
+
+
+웃: what do the numbers mean?
+
+🐱: the cpu cost is reported
+    as lua and system cycle
+    counts. look up stat(1)
+    and stat(2) for more info.
+
+    if you're not sure, just
+    look at the first number.
+    lower is faster (better)
+
+
+
+웃: why "{locals={9}}"
+    in the example?
+
+🐱: accessing local variables
+    is faster than global vars.
+
+    so if your test involves
+    local variables, simulate
+    this by passing them in:
+
+      prof(function(a)
+        sqrt(a)
+      end,{ locals={9} })
+
+    /!\     /!\     /!\     /!\
+    local values from outside
+    the current scope are also
+    slower to access! example:
+
+      global = 4
+      local outer = 4
+      prof(function(x)
+        local _ = x --fast
+      end,function(x)
+        local _ = outer --slow
+      end,function(x)
+        local _ = global --slow
+      end,{ locals={4} })
+    /!\     /!\     /!\     /!\
+
+
+
+웃: can i do "prof(myfunc)"?
+
+🐱: no, this sometimes gives
+    wrong results! always use
+    inline functions:
+
+      prof(function()
+        --code for myfunc here
+      end)
+
+    as an example, "prof(sin)"
+    reports "-2" -- wrong! but
+    "prof(function()sin()end)"
+    correctly reports "4"
+
+    (see the technical notes at
+    the start of the next tab
+    for a brief explanation.
+    technically, "prof(myfunc)"
+    will work if myfunc was made
+    by the user, but you will
+    risk confusing yourself)
+
+
+
+---------------
+ ★ method 2 ★
+---------------
+
+
+
+this cart is based on
+code by samhocevar:
+https://www.lexaloffle.com/bbs/?pid=60198#p
+
+if you do this method, be very
+careful with local/global vars.
+it's very easy to accidentally
+measure the wrong thing.
+
+here's an example of how to
+measure cycles (ignoring this
+cart and using the old method)
+
+  function _init()
+    local a=11.2 -- locals
+
+    local n=1024
+    flip()
+    local tot1,sys1=stat(1),stat(2)
+    for i=1,n do   end --calibrate
+    local tot2,sys2=stat(1),stat(2)
+    for i=1,n do local _=sqrt(a) end --measure
+    local tot3,sys3=stat(1),stat(2)
+
+    function cyc(t0,t1,t2) return ((t2-t1)-(t1-t0))*128/n*256/stat(8)*256 end
+    local lua = cyc(tot1-sys1,tot2-sys2,tot3-sys3)
+    local sys = cyc(sys1,sys2,sys3)
+    print(lua.."+"..sys.."="..(lua+sys).." (lua+sys)")
+  end
+
+run this once, see the results,
+then change the "measure" line
+to some other code you want
+to measure.
+
+note: wrapping the code inside
+"_init()" is required, otherwise
+builtin functions like "sin"
+will be measured wrong.
+(the reason is explained at
+the start of the next tab)
+
+
+
+---------------
+ ★ method 3 ★
+---------------
+
+
+
+another way to measure cpu cost
+is to run something like this:
+
+  function _draw()
+    cls(1)
+    local x=9
+    for i=1,1000 do
+      local a=sqrt(x) --snippet1
+  --    local b=x^0.5 --snippet2
+    end
+  end
+
+while running, press ctrl-p to
+see the performance monitor.
+the middle number shows how much
+of cpu is being used, as a
+fraction. (0.60 = 60% used)
+
+now, change the comments on the
+two code snippets inside _draw()
+and re-run. compare the new
+result with the old to determine
+which snippet is faster.
+
+note: every loop iteration costs
+an additional 2 cycles, so the
+ratio of the two fractions will
+not match the ratio of the 
+execution time of the snippets.
+but this method can quickly tell
+you which snippet is faster.
+
+
+
+]]
+
+-->8
+--[[ profiler.lua
+more info: https://www.lexaloffle.com/bbs/?tid=46117
+
+usage:
+  prof(function()
+    memcpy(0,0x200,64)
+  end,function()
+    poke4(0,peek4(0x200,16))
+  end)
+
+passing locals:
+  prof(
+    function(a,b)
+      local c=(a+1)*(b+1)-1
+    end,
+    function(a,b)
+      local c=a*b+a+b
+    end,
+    {locals={3,5}}
+  )
+
+getting global/local variables exactly right
+is very tricky; you should always use inline
+functions like above; if you try e.g. prof(sin)
+the results will be wrong.
+
+
+# minutiae / notes to self:
+---------------------------
+doing this at top-level is awkward:
+  for _=1,n do       end -- calibrate
+  for _=1,n do sin() end -- measure
+b/c sin is secretly local at top-level,
+so it gives a misleading result (3 cycles).
+do it inside _init instead for a
+more representative result (4 cycles).
+
+## separate issue:
+------------------
+if you call prof(sin), it gives the wrong result (-2 cycles) because
+it's comparing sin() against noop() (not truly nothing).
+but we want the noop() there for normal inline prof() calls,
+to avoid measuring the cost of the indirection
+(calling func() from inside prof() is irrelevant to
+how cpu-expensive func()'s body is)
+]]
+
+-- prof(fn1,fn2,...,fnN,[opts])
+--
+-- opts.locals: values to pass
+-- opts.name: text label
+-- opts.n: number of iterations
+function prof(...)
+  local funcs={...}
+  local opts=type(funcs[#funcs])=="table" and deli(funcs) or {}
+
+  -- build output string
+  local msg=""
+  local function log(s)
+    msg..=s.."\n"
+  end
+
+  if opts.name then
+    log("prof: "..opts.name)
+  end
+  for fn in all(funcs) do
+    local dat=prof_one(fn,opts)
+    log(sub("  "..dat.total,-3)
+      .." ("
+      ..dat.lua
+      .." lua, "
+      ..dat.sys
+      .." sys)")
+  end
+
+  -- copy to clipboard
+  printh(msg,"@clip")
+  -- print + pause
+  cls()
+  stop(msg)
+end
+
+function prof_one(func, opts)
+  opts = opts or {}
+  local n = opts.n or 0x200 --how many times to call func
+  local locals = opts.locals or {} --locals to pass func
+
+  -- we want to type
+  --   local m = 0x80_0000/n
+  -- but 8MHz is too large to fit in a pico-8 number,
+  -- so we do (0x80_0000>>16)/(n>>16) instead
+  -- (n is always an integer, so n>>16 won't lose any bits)
+  local m = 0x80/(n>>16)
+  assert(0x80/m << 16 == n, "n is too small") -- make sure m didn't overflow
+  local fps = stat(8)
+
+  -- given three timestamps (pre-calibration, middle, post-measurement),
+  --   calculate how many more CPU cycles func() took compared to noop()
+  -- derivation:
+  --   T := ((t2-t1)-(t1-t0))/n (frames)
+  --     this is the extra time for each func call, compared to noop
+  --     this is measured in #-of-frames -- it will be a small fraction for most ops
+  --   F := 1/30 (seconds/frame) (or 1/60 if this test is running at 60fps)
+  --     this is just the framerate that the tests run at, not the framerate of your game
+  --   M := 256*256*128 = 0x80_0000 = 8MHz (cycles/second)
+  --     (PICO-8 runs at 8MHz; see https://www.lexaloffle.com/dl/docs/pico-8_manual.html#CPU)
+  --   cycles := T frames * F seconds/frame * M cycles/second
+  -- optimization / working around pico-8's fixed point numbers:
+  --   T2 := T*n = (t2-t1)-(t1-t0)
+  --   M2 := M/n = (M>>16)/(n>>16) := m (e.g. when n is 0x1000, m is 0x800)
+  --   cycles := T2*M2*F
+  local function cycles(t0,t1,t2)
+    local diff = (t2-t1)-(t1-t0)
+    local e1 = "must use inline functions -- see usage guide"
+    assert(0<=diff,e1)
+    local thresh = 0x7fff.ffff/(m/fps)
+    local e2 = "code is too large or slow -- try profiling manually with stat(1)"
+    assert(diff<=thresh,e2)
+    return diff*(m/fps)
+  end
+
+  local noop = function() end -- this must be local, because func is local
+  flip() --avoid flipping mid-measurement
+  local atot,asys=stat(1),stat(2)
+  for _=1,n do noop(unpack(locals)) end -- calibrate
+  local btot,bsys=stat(1),stat(2)
+  for _=1,n do func(unpack(locals)) end -- measure
+  local ctot,csys=stat(1),stat(2)
+
+  -- gather results
+  local tot=cycles(atot,btot,ctot)
+  local sys=cycles(asys,bsys,csys)
+  return {
+    lua=tot-sys,
+    sys=sys,
+    total=tot,
+  }
+end
+
+-->8
+-- your code here
+
+bigarr = (function()
+  local ret = {}
+  for i=1,100 do
+   ret[i]=i
+  end
+  return ret
+ end)()
+
+--edit me:
+prof(function()
+ local a, sum = bigarr, 0
+ for x=1,#a do
+  sum += a[x]
+ end
+end,function()
+ local a, sum = bigarr, 0
+ for v in all(a) do
+  sum += v
+ end
+end,function()
+ local a, sum = bigarr, 0
+ foreach(a, function(v) sum+= v end)
+end,{ locals={} })
+
+-- "locals" (optional) are
+-- passed in as args. see the
+-- usage guide for details.
+
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+__sfx__
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--- a/collision_profiling.p8
+++ b/collision_profiling.p8
@ -0,0 +1,495 @@
+pico-8 cartridge // http://www.pico-8.com
+version 42
+__lua__
+-- prof: cpu cycle counter v1.4
+--  BY PANCELOR
+--[[------------------------
+
+
+use this cart to precisely
+measure code execution time
+
+--------------------------------
+         ★ overview ★
+--------------------------------
+| tab 0 | usage guide          |
+| tab 1 | (internals)          |
+| tab 2 | your code here       |
+--------------------------------
+
+
+-----------------------
+-- ★ usage guide ★ --
+-----------------------
+
+
+웃: i have two code snippets;
+    which one is faster?
+
+🐱: edit the last tab with your
+    snippets, then run the cart.
+    it will tell you precisely
+    how much cpu it takes to
+    run each snippet.
+
+    the results are also copied
+    to your clipboard.
+
+
+
+웃: what do the numbers mean?
+
+🐱: the cpu cost is reported
+    as lua and system cycle
+    counts. look up stat(1)
+    and stat(2) for more info.
+
+    if you're not sure, just
+    look at the first number.
+    lower is faster (better)
+
+
+
+웃: why "{locals={9}}"
+    in the example?
+
+🐱: accessing local variables
+    is faster than global vars.
+
+    so if your test involves
+    local variables, simulate
+    this by passing them in:
+
+      prof(function(a)
+        sqrt(a)
+      end,{ locals={9} })
+
+    /!\     /!\     /!\     /!\
+    local values from outside
+    the current scope are also
+    slower to access! example:
+
+      global = 4
+      local outer = 4
+      prof(function(x)
+        local _ = x --fast
+      end,function(x)
+        local _ = outer --slow
+      end,function(x)
+        local _ = global --slow
+      end,{ locals={4} })
+    /!\     /!\     /!\     /!\
+
+
+
+웃: can i do "prof(myfunc)"?
+
+🐱: no, this sometimes gives
+    wrong results! always use
+    inline functions:
+
+      prof(function()
+        --code for myfunc here
+      end)
+
+    as an example, "prof(sin)"
+    reports "-2" -- wrong! but
+    "prof(function()sin()end)"
+    correctly reports "4"
+
+    (see the technical notes at
+    the start of the next tab
+    for a brief explanation.
+    technically, "prof(myfunc)"
+    will work if myfunc was made
+    by the user, but you will
+    risk confusing yourself)
+
+
+
+---------------
+ ★ method 2 ★
+---------------
+
+
+
+this cart is based on
+code by samhocevar:
+https://www.lexaloffle.com/bbs/?pid=60198#p
+
+if you do this method, be very
+careful with local/global vars.
+it's very easy to accidentally
+measure the wrong thing.
+
+here's an example of how to
+measure cycles (ignoring this
+cart and using the old method)
+
+  function _init()
+    local a=11.2 -- locals
+
+    local n=1024
+    flip()
+    local tot1,sys1=stat(1),stat(2)
+    for i=1,n do   end --calibrate
+    local tot2,sys2=stat(1),stat(2)
+    for i=1,n do local _=sqrt(a) end --measure
+    local tot3,sys3=stat(1),stat(2)
+
+    function cyc(t0,t1,t2) return ((t2-t1)-(t1-t0))*128/n*256/stat(8)*256 end
+    local lua = cyc(tot1-sys1,tot2-sys2,tot3-sys3)
+    local sys = cyc(sys1,sys2,sys3)
+    print(lua.."+"..sys.."="..(lua+sys).." (lua+sys)")
+  end
+
+run this once, see the results,
+then change the "measure" line
+to some other code you want
+to measure.
+
+note: wrapping the code inside
+"_init()" is required, otherwise
+builtin functions like "sin"
+will be measured wrong.
+(the reason is explained at
+the start of the next tab)
+
+
+
+---------------
+ ★ method 3 ★
+---------------
+
+
+
+another way to measure cpu cost
+is to run something like this:
+
+  function _draw()
+    cls(1)
+    local x=9
+    for i=1,1000 do
+      local a=sqrt(x) --snippet1
+  --    local b=x^0.5 --snippet2
+    end
+  end
+
+while running, press ctrl-p to
+see the performance monitor.
+the middle number shows how much
+of cpu is being used, as a
+fraction. (0.60 = 60% used)
+
+now, change the comments on the
+two code snippets inside _draw()
+and re-run. compare the new
+result with the old to determine
+which snippet is faster.
+
+note: every loop iteration costs
+an additional 2 cycles, so the
+ratio of the two fractions will
+not match the ratio of the 
+execution time of the snippets.
+but this method can quickly tell
+you which snippet is faster.
+
+
+
+]]
+
+-->8
+--[[ profiler.lua
+more info: https://www.lexaloffle.com/bbs/?tid=46117
+
+usage:
+  prof(function()
+    memcpy(0,0x200,64)
+  end,function()
+    poke4(0,peek4(0x200,16))
+  end)
+
+passing locals:
+  prof(
+    function(a,b)
+      local c=(a+1)*(b+1)-1
+    end,
+    function(a,b)
+      local c=a*b+a+b
+    end,
+    {locals={3,5}}
+  )
+
+getting global/local variables exactly right
+is very tricky; you should always use inline
+functions like above; if you try e.g. prof(sin)
+the results will be wrong.
+
+
+# minutiae / notes to self:
+---------------------------
+doing this at top-level is awkward:
+  for _=1,n do       end -- calibrate
+  for _=1,n do sin() end -- measure
+b/c sin is secretly local at top-level,
+so it gives a misleading result (3 cycles).
+do it inside _init instead for a
+more representative result (4 cycles).
+
+## separate issue:
+------------------
+if you call prof(sin), it gives the wrong result (-2 cycles) because
+it's comparing sin() against noop() (not truly nothing).
+but we want the noop() there for normal inline prof() calls,
+to avoid measuring the cost of the indirection
+(calling func() from inside prof() is irrelevant to
+how cpu-expensive func()'s body is)
+]]
+
+-- prof(fn1,fn2,...,fnN,[opts])
+--
+-- opts.locals: values to pass
+-- opts.name: text label
+-- opts.n: number of iterations
+function prof(...)
+  local funcs={...}
+  local opts=type(funcs[#funcs])=="table" and deli(funcs) or {}
+
+  -- build output string
+  local msg=""
+  local function log(s)
+    msg..=s.."\n"
+  end
+
+  if opts.name then
+    log("prof: "..opts.name)
+  end
+  for fn in all(funcs) do
+    local dat=prof_one(fn,opts)
+    log(sub("  "..dat.total,-3)
+      .." ("
+      ..dat.lua
+      .." lua, "
+      ..dat.sys
+      .." sys)")
+  end
+
+  -- copy to clipboard
+  printh(msg,"@clip")
+  -- print + pause
+  cls()
+  stop(msg)
+end
+
+function prof_one(func, opts)
+  opts = opts or {}
+  local n = opts.n or 0x200 --how many times to call func
+  local locals = opts.locals or {} --locals to pass func
+
+  -- we want to type
+  --   local m = 0x80_0000/n
+  -- but 8MHz is too large to fit in a pico-8 number,
+  -- so we do (0x80_0000>>16)/(n>>16) instead
+  -- (n is always an integer, so n>>16 won't lose any bits)
+  local m = 0x80/(n>>16)
+  assert(0x80/m << 16 == n, "n is too small") -- make sure m didn't overflow
+  local fps = stat(8)
+
+  -- given three timestamps (pre-calibration, middle, post-measurement),
+  --   calculate how many more CPU cycles func() took compared to noop()
+  -- derivation:
+  --   T := ((t2-t1)-(t1-t0))/n (frames)
+  --     this is the extra time for each func call, compared to noop
+  --     this is measured in #-of-frames -- it will be a small fraction for most ops
+  --   F := 1/30 (seconds/frame) (or 1/60 if this test is running at 60fps)
+  --     this is just the framerate that the tests run at, not the framerate of your game
+  --   M := 256*256*128 = 0x80_0000 = 8MHz (cycles/second)
+  --     (PICO-8 runs at 8MHz; see https://www.lexaloffle.com/dl/docs/pico-8_manual.html#CPU)
+  --   cycles := T frames * F seconds/frame * M cycles/second
+  -- optimization / working around pico-8's fixed point numbers:
+  --   T2 := T*n = (t2-t1)-(t1-t0)
+  --   M2 := M/n = (M>>16)/(n>>16) := m (e.g. when n is 0x1000, m is 0x800)
+  --   cycles := T2*M2*F
+  local function cycles(t0,t1,t2)
+    local diff = (t2-t1)-(t1-t0)
+    local e1 = "must use inline functions -- see usage guide"
+    assert(0<=diff,e1)
+    local thresh = 0x7fff.ffff/(m/fps)
+    local e2 = "code is too large or slow -- try profiling manually with stat(1)"
+    assert(diff<=thresh,e2)
+    return diff*(m/fps)
+  end
+
+  local noop = function() end -- this must be local, because func is local
+  flip() --avoid flipping mid-measurement
+  local atot,asys=stat(1),stat(2)
+  for _=1,n do noop(unpack(locals)) end -- calibrate
+  local btot,bsys=stat(1),stat(2)
+  for _=1,n do func(unpack(locals)) end -- measure
+  local ctot,csys=stat(1),stat(2)
+
+  -- gather results
+  local tot=cycles(atot,btot,ctot)
+  local sys=cycles(asys,bsys,csys)
+  return {
+    lua=tot-sys,
+    sys=sys,
+    total=tot,
+  }
+end
+
+-->8
+-- your code here
+
+--edit me:
+prof(function(b1,b2)
+	return 
+	  b1[1]<=b2[3]
+	  and b1[2]<=b2[4]
+	  and b1[3]>=b2[1]
+	  and b1[4]>=b2[2]
+end,function(b1, b2)
+	return 
+	  b1.x1<=b2.x2
+	  and b1.y1<=b2.y2
+	  and b1.x2>=b2.x1
+	  and b1.y2>=b2.y1
+end,{ locals={{1,1,1,1,x1=1,x2=1,y1=1,y2=1},{1,1,1,1,x1=1,x2=1,y1=1,y2=1}} })
+
+-- "locals" (optional) are
+-- passed in as args. see the
+-- usage guide for details.
+
+__label__
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+
+__sfx__
+030100003052500505005050050500505005050050500505005050050500505005050050500505005050050500505005050050500505005050050500505005050050500505005050050500505005050050500505
--- a/vacuum_gambit.p8
+++ b/vacuum_gambit.p8
@ -59,90 +59,45 @@ function mknew(tt)
 return tt
 end

-- intrusive singly-linked list.
-- cannot be nested or crossed!
-linked_list = mknew{
- is_linked_list=true,
- init = function(x)
-  x.next=nil
-  x.tail=x
- end,
-}
-
-function linked_list:push_back(x)
- self.tail.next = x
- self.tail = x
+-- call f on everything on list
+-- and return a new list of
+-- items for which f was true.
+function filtered(list, f)
+ local ret, n = {}, 0
+ for v in all(list) do
+  if f(v) then
+   n += 1
+   ret[n] = v
+  end
+ end
+ return ret
 end

-function linked_list:push_front(x)
- if (not self.next) self.tail = x
- x.next = self.next
- self.next = x
+-- call :move on everything on
+-- src and dump everything
+-- for which it returned true
+-- onto dest.
+function appendmove(dest, src)
+ local n = #dest
+ for v in all(src) do
+  if v:move() then
+   n += 1
+   dest[n] = v
  end
-
-- vore eats another linked list
-- by appending its contents.
-- the ingested linked is empty.
-function linked_list:vore(x)
- if (not x.next) return
- self.tail.next = x.next
- self.tail = x.tail
- x.next = nil
- x.tail = x
-end
-
-- strip calls f(x) for each
-- node, removing each node for
-- which f(x) returns true.
-function linked_list:strip(f)
- local p, n = self, self.next
- while n do
-  if f(n) then
-   p.next = n.next
-  else
-   p = n
-  end
-  n = n.next
- end
- self.tail = p
-end
-
-- stripmove calls x:move() for
-- each node, removing each node
-- for which x:move() is true.
-function linked_list:stripmove()
- local p, n = self, self.next
- while n do
-  if n:move() then
-   p.next = n.next
-  else
-   p = n
-  end
-  n = n.next
- end
- self.tail = p
-end
-
-- optimized special case -
-- could be done with strip but
-- this avoids extra function
-- calls and comparisions since
-- draw isn't allowed to kill
-- the item
-function linked_list:draw()
- local n = self.next
- while n do
-  n:draw()
-  n = n.next
 end
 end

-
-function linked_list:pop_front()
- local ret = self.next
- if (not ret) return
- self.next = ret.next
- if (not ret.next) ret.tail = nil
+-- like filtered, but calls
+-- :move on stuff in the list
+-- instead of taking a func arg.
+function filtermoved(list)
+ local ret, n = {}, 0
+ for v in all(list) do
+  if v:move() then
+   n += 1
+   ret[n] = v
+  end
+ end
 return ret
 end

@ -156,12 +111,12 @@ function _init()
 end

 function once_next_frame(f)
- new_events:push_back{
+ add(new_events, {
  move = function()
   f()
   return true
  end,
- }
+ })
 end

 -- health gradients for 1..5 hp
@ -175,20 +130,20 @@ hpcols_lut = csv[[36
 -- call after any change to maxhp
 -- configures health gradient
 function init_hpcols()
- hpcols = hpcols_lut[min(primary_ship.maxhp,6)]
+ hpcols = hpcols_lut[min(primary_ship.maxhp,5)]
 end

 function wipe_game()
 xpwhoosh = nil
 primary_ship = player.new()
 init_hpcols()
- eships = linked_list.new()
- pbullets = linked_list.new()
- ebullets = linked_list.new()
- intangibles_fg = linked_list.new()
- intangibles_bg = linked_list.new()
- events = linked_list.new()
- new_events = linked_list.new()
+ eships = {}
+ pbullets ={}
+ ebullets ={}
+ intangibles_fg = {}
+ intangibles_bg = {}
+ events = {}
+ new_events = {}
 	primary_ship.main_gun = zap_gun_p.new()
 primary_ship.main_gun:peel()
 gframe = 0
@ -241,10 +196,11 @@ function updategame()
  current_wave = flotilla.new()
  current_wave:load(rnd() > 0.5 and 7 or 0, 0, min(ones(waves_complete)\2, 4))
 end
- events:vore(new_events)
- for _, lst in ipairs{events, intangibles_bg, eships} do
-  lst:stripmove()
- end
+ events = filtermoved(events)
+ appendmove(events, new_events)
+ new_events = {}
+ intangibles_bg = filtermoved(intangibles_bg)
+ eships = filtermoved(eships)

 	-- eship collider will be used
 -- both for pship and pbullets.
@ -255,29 +211,30 @@ function updategame()
  local pbox = hurtbox(ps)
  for es in eship_collider:iterate_collisions(pbox) do
   ps:hitship(es)
-   if(es:hitship(ps)) eship_collider:yoink(es)
+   es:hitship(ps)
  end
-  ebullets:strip(function(eb)
-   if (eb:move()) return true
-   if (not collides(pbox, hurtbox(eb))) return
+  ebullets = filtered(ebullets, function(eb)
+   if (not eb:move()) return
+   if (not collides(pbox, hurtbox(eb))) return true
   ps:hitbullet(eb)
-   return eb:hitship(ps)
+   return not eb:hitship(ps)
  end)
 else
-  ebullets:stripmove()
+  ebullets=filtermoved(ebullets)
 end

- pbullets:strip(function(pb)
-  if (pb:move()) return true
+ pbullets = filtered(pbullets, function(pb)
+  if (not pb:move()) return
  for es in eship_collider:iterate_collisions(hurtbox(pb)) do
-   if (es:hitbullet(pb)) eship_collider:yoink(es)
-   if (pb:hitship(es)) return true
+   es:hitbullet(pb)
+   if (pb:hitship(es)) return
  end
+  return true
 end)
 
- intangibles_fg:stripmove()
+ intangibles_fg = filtermoved(intangibles_fg)

-	if waves_complete == 32767 and not eships.next and not ebullets.next and not events.next then
+	if waves_complete == 32767 and #eships == 0 and #ebullets == 0 and #events == 0 then
 	  game_state = win
 	end
 	if (ps.dead) game_state = lose
@ -345,15 +302,6 @@ function puke(item, indent, seen, hidekey)
 end
 local xpfx = pfx.." "

- if item.is_linked_list then
-  local ret,n = "linked_list <",0
-  item:strip(function(x)
-   n += 1
-   ret ..= xpfx..tostr(n)..": "..puke(x, indent+2, seen, "next")
-  end)
-  return ret..pfx..">"
- end
-
 local ret = "{"
 for k, v in pairs(item) do
  if (k ~= hidekey) ret ..= xpfx..tostr(k)..": "..puke(v, indent+2, seen)
@ -373,8 +321,10 @@ end
 function drawgame()
 clip(0,0,112,128)
 rectfill(0,0,112,128,0)
- for drawable in all{intangibles_bg, pbullets, primary_ship, eships, ebullets, intangibles_fg} do
-  drawable:draw()
+ for drawables in all{intangibles_bg, pbullets, {primary_ship}, eships, ebullets, intangibles_fg} do
+  for d in all(drawables) do
+   d:draw()
+  end
 end
 clip(0,0,128,128)
 drawhud()
@ -586,9 +536,10 @@ function ship_m:constrain(p, dp, pmin, pmax, want)
 end

 function ship_m:move()
+ if (self.dead) return;
 self:refresh_shield()
 local dx, dy, shoot_spec1, shoot_spec2 = self:act()
- local sg, xm, ym = self.special_guns, self.xmomentum, self.ymomentum
+ local sg, xm, ym, sp = self.special_guns, self.xmomentum, self.ymomentum, self.sparks
 dx = self:constrain(self.x, xm, self.xmin, self.xmax, dx)
 dy = self:constrain(self.y, ym, self.ymin, self.ymax, dy)
 self:maybe_shoot(self.main_gun)
@ -596,7 +547,7 @@ function ship_m:move()
  if (shoot_spec1) self:maybe_shoot(sg[1])
  if (shoot_spec2) self:maybe_shoot(sg[2])
 end
- spark(self.sparks, self.x + 4*self.size, self.y + 4*self.size, dx*2.5, dy*2.5, self.sparkodds)
+ if(sp) spark(sp, self.x + 4*self.size, self.y + 4*self.size, dx*2.5, dy*2.5, self.sparkodds)
 xm = self:calc_velocity(xm, dx)
 ym = self:calc_velocity(ym, dy)

@ -605,7 +556,7 @@ function ship_m:move()
 self.xmomentum = xm
 self.ymomentum = ym

- return false
+ return true
 end

 function ship_m:draw()
@ -617,12 +568,8 @@ end

 function hurtbox(ship)
 local h = ship.hurt
- return {
-  x=ship.x + h.x_off,
-  y=ship.y + h.y_off,
-  width=h.width,
-  height=h.height
- }
+ local x1,y1 = ship.x + h.x_off, ship.y+h.y_off
+ return {x1=x1, y1=y1, x2=x1+h.width, y2=y1+h.height}
 end

 function ship_m:maybe_shoot(gun)
@ -671,14 +618,6 @@ end
 -->8
 -- bullet and gun behaviors

-function player_blt_cat()
- return pbullets
-end
-
-function enemy_blt_cat()
- return ebullets
-end
-
 -- x, y: position
 -- dx, dy: movement (linear)
 -- f: frames remaining; nil for no limit
@ -691,9 +630,9 @@ end
 --   details, check impl
 -- damage -- damage to do to
 --   a ship that gets hit
-- category -- function that
--   returns which bullet list
--   to spawn onto
+-- category -- string naming
+--   which bullet list to spawn
+--   onto, from _ENV
 -- hitship -- event handler,
 --   takes ship as argument.
 --   default: die, return true.
@ -826,13 +765,9 @@ function bullet_base:hitship(_)
 end

 function bullet_base:move()
- local x,y,f = self.x + self.dx, self.y+self.dy,self.f
+ local x,y = self.x + self.dx, self.y+self.dy
 self.x,self.y=x,y
- if f then
-  self.f = f-1
-  if (f <= 0) return true
- end
- return (y> 130) or (y < -(self.height<<3)) or (x > 128) or (x < -(self.width<<3))
+ return (y<=128) and (y >= -16) and (x <= 128) and (x >= -16)
 end

 function bullet_base:draw()
@ -842,7 +777,7 @@ end
 function bullet_base:spawn_at(x, y)
 self.x = x - self.x_off
 self.y = y - self.y_off
- self.category():push_back(self)
+ add(_ENV[self.category], self)
 end

 function gun_base:shoot(x, y)
@ -912,7 +847,7 @@ zap_p = mknew(bullet_base.new{

 hitship = const_fxn(true),

- category = player_blt_cat,
+ category = "pbullets",
 })

 zap_gun_p = mknew(gun_base.new{
@ -954,7 +889,7 @@ blast = mknew(bullet_base.new{
  if self.damage > 0 and not self.awaitcancel then
   self.awaitcancel = true
   once_next_frame(function()
-    new_events:push_back{
+    add(new_events, {
     wait = 4,
     obj = self,
     saved_dmg = self.damage,
@ -965,13 +900,13 @@ blast = mknew(bullet_base.new{
       return true
      end
     end,
-    }
+    })
    self.damage = 0
    self.awaitcancel = false
   end)
  end
 end,
- category=player_blt_cat
+ category="pbullets"
 })

 blast_gun = mknew(gun_base.new{
@ -1010,14 +945,14 @@ protron_e = mknew(bullet_base.new{
 y_off = 4,
 
 damage = 1,
- category = enemy_blt_cat,
+ category = "ebullets",
 })

 protron_p = mknew(protron_e.new{
 sprite=23,
 dym = -1,
 y_off = 0,
- category=player_blt_cat,
+ category="pbullets",
 })

 protron_gun_e = mknew(gun_base.new{
@ -1064,13 +999,13 @@ vulcan_e = mknew(bullet_base.new{
 y_off = 0,
 
 damage = 0.5,
- category=enemy_blt_cat
+ category="ebullets"
 })

 vulcan_p = mknew(vulcan_e.new{
 sprite=22,
 y_off = 4,
- category=player_blt_cat
+ category="pbullets"
 })

 vulcan_gun_e = mknew(gun_base.new{
@ -1087,7 +1022,7 @@ machine_gun_e = mknew(vulcan_gun_e.new{
 icon = 38,
 clip_size = 12,
 clip_interval = 0x0.005a,
- shots = {{{0, 2}}, {{0, -2}}}
+ shots = {{{0.0625, 2}}, {{-0.0625, -2}}}
 })

 vulcan_gun_p = mknew(vulcan_gun_e.new{
@ -1129,8 +1064,8 @@ player = mknew(ship_m.new{
 boss = true,  -- dramatic special effects
 
 -- health
- hp = 3, -- current health, non-regenerating
- maxhp = 3, -- player only; other ships never heal
+ hp = 1024, -- current health, non-regenerating
+ maxhp = 1024, -- player only; other ships never heal
 shield = 2, -- regenerates
 maxshield = 2,

@ -1406,21 +1341,19 @@ end
 -->8
 -- collisions

-- box: x, y, width, height
-
-function collides(box1, box2)
-	return not (
-	  box1.x>box2.x+box2.width
-	  or box1.y>box2.y+box2.height
-	  or box1.x+box1.width<box2.x
-	  or box1.y+box1.height<box2.y)
+-- box: x1, y1, x2, y2
+function collides(b1, b2)
+	return
+   b1.y1<=b2.y2
+	  and b1.y2>=b2.y1
+	  and b1.x1<=b2.x2
+	  and b1.x2>=b2.x1
 end

 collider = mknew{
 init = function(x)
-  x.suppress = {}
-  local p, n = x.from, x.from.next
-  while n do
+  local from = x.from
+  for n in all(from) do
   -- insert
   for i in all(collider_indexes(hurtbox(n))) do
    local a = x[i]
@ -1430,35 +1363,20 @@ collider = mknew{
    end
    add(a, n)
   end
-   -- prepare yoink
-   n.prev = p
-   p = n
-   n = n.next
  end
 end,
 }

 function collider_indexes(box)
- local ret = {}
- for x = box.x\8, (box.x+box.width)\8 do
-  for y = box.y\8, (box.y+box.height)\8 do
-   add(ret, x+256*y)
+ local ret, ylo, yhi = {}, box.y1\8, box.y2\8
+ for x = box.x1\8, box.x2\8 do
+  for y = ylo, yhi do
+   add(ret, x+(y<<8))
  end
 end
 return ret
 end

-function collider:yoink(item)
- self.suppress[item]=true
- local p,n = item.prev,item.next
- p.next = n
- if n then
-  n.prev = p
- else
-  self.from.tail = p
- end
-end
-
 function collider:iterate_collisions(box)
 local seen = { }
 local bucket_ids = collider_indexes(box)
@ -1474,7 +1392,7 @@ function collider:iterate_collisions(box)
    bi += 1
    if not seen[candidate] then
     seen[candidate] = true
-     if (not self.suppress[candidate] and collides(box, hurtbox(candidate))) return candidate
+     if (not candidate.dead and collides(box, hurtbox(candidate))) return candidate
    end
   end -- done with this bucket
   bi=1
@ -1561,7 +1479,7 @@ function flotilla:load(ulc_cx, ulc_cy, lvl)
   for s in all(row) do
    counts[s.ship_t] += 1
    s.x,s.y=rnd_spawn_loc()
-    eships:push_back(s)
+    add(eships, s)
   end
   add(rows, row)
  end
@ -1648,13 +1566,13 @@ blip_fx = mknew{
 }

 function blip_fx:move()
- if (self.cancel) return true
+ if (self.cancel) return
 self.frames -= 1
 if self.frames < 0 then
  self.obj.fx_pal = nil
-  return true
+  return
 end
- return false
+ return true
 end

 function blip_fx:abort()
@ -1675,7 +1593,7 @@ end
 function blip(obj, col)
 obj.fx_pal = blip_pals[col]
 if (obj.___fx_pal_event) obj.___fx_pal_event:abort() 
- events:push_back(blip_fx.new{frames=3, obj=obj})
+ add(events, blip_fx.new{frames=3, obj=obj})
 end

 bossspark = split"7,7,10,10,9,9,9,8,8,8,2,2,5,5"
@ -1699,27 +1617,28 @@ spark_particle=mknew{}

 function spark_particle:move()
 if (rnd(4) < 1) self.sidx += 1
- if (self.sidx > #self.sprs) return true
+ if (self.sidx > #self.sprs) return
 self.x += self.dx
 self.y += self.dy
 self.dx -= mid(0.05,-0.05, self.dx)
 self.dy -= mid(0.05,-0.05, self.dy)
+ return true
 end
 function spark_particle:draw()
 pset(self.x,self.y,self.sprs[self.sidx])
 end

 function spark(sprs, x, y, dx, dy, odds, fg)
- if (sprs==nil or flr(rnd(odds) or (abs(dx) < 0.5 and abs(dy))) ~= 0) return
+ if ((dx > -0.5 and dx < 0.5 and dy > -0.5 and dy < 0.5) or rnd(odds) >= 1) return
 local target = fg and intangibles_fg or intangibles_bg
- target:push_back(spark_particle.new{
+ target[#target+1] = spark_particle.new{
  x = x + rnd(4) - 2,
  y = y + rnd(4) - 2,
  sprs = sprs,
  sidx = 1,
  dx = dx * rnd(2),
  dy = dy * rnd(2),
- })
+ }
 end
 -->8
 -- powerups
@ -1729,7 +1648,7 @@ xp_gem = mknew(bullet_base.new{
 dy = 0.75,
 width=1, -- not used for spr but
 height=1,-- bullet_base uses it
- category = enemy_blt_cat,
+ category = "ebullets",
 damage = 0,
 hurt = {
  x_off = -2,
Author	SHA1	Message	Date
Kistaro Windrider	7e4833d567	very silly shot pattern	2025-06-28 23:11:27 -07:00
Kistaro Windrider	c752e8e1e3	fix hpcols_init note that I need to re-call this whenever I have a new max hp also note that vertmeter does not handle 1024 correctly. find out what max hp functions and hardcap it	2025-06-28 23:10:57 -07:00
Kistaro Windrider	507f06fb8c	more efficient bullet spawning	2025-06-28 22:59:51 -07:00
Kistaro Windrider	14849101dd	skip call to sparks if there are no sparks Then don't check for nil spark colors in sparks itself. Also uses a more verbose but more efficient exit check, and fixes a bug.	2025-06-28 22:49:10 -07:00
Kistaro Windrider	2cd7c64dd9	micro-optimize bullet details Shots that miss are most likely to not be there yet, so check Y-top first. If I assume shots will never be larger than 16 pixels per side, there is no reason to check the ship's genuine width and height.	2025-06-28 22:35:36 -07:00
Kistaro Windrider	2d5d392df0	reverse strip logic saves a single cycle per bullet, but...	2025-06-24 23:16:47 -07:00
Kistaro Windrider	904fbe6b2e	bullets don't expire	2025-06-24 23:06:09 -07:00
Kistaro Windrider	36b268e057	initialization is very slightly faster this way, I think	2025-06-24 22:54:03 -07:00
Kistaro Windrider	3d6ef03b37	attempt to optimize collision it's actually worse	2025-06-24 22:36:58 -07:00
Kistaro Windrider	d7e029edb6	profile-guided optimization	2025-06-23 01:37:57 -07:00
Kistaro Windrider	5e6b98523b	delete linked lists and use optimized array impls. Also removes "suppress" table from collider, use candidate.dead instead because the set of dead ships and the set of non-colliding ships is identical.	2025-06-23 00:47:02 -07:00