staggered "xp", "hp" labels in UI

"x" looks pretty bad with a drop shadow! will tweak soon anyway

.gitignore

@@ -0,0 +1,2 @@
+.DS_Store
+.vscode/settings.json

autobrake_test.p8

@@ -0,0 +1,244 @@
+pico-8 cartridge // http://www.pico-8.com
+version 41
+__lua__
+
+-- vacuum gambit automatic brake test
+-- by kistaro windrider
+
+function usplit(str)
+ return unpack(split(str))
+end
+function csv(s)
+ local ret = split(s, "\n")
+ for i, v in ipairs(ret) do
+  ret[i] = type(v) == "string" and split(v) or { v }
+ end
+ return ret
+end
+
+-- generate standard "overlay"
+-- constructor for type tt.
+-- if more is defined, generated
+-- new calls more(ret) after
+-- ret is definitely not nil
+-- before calling setmetatable.
+-- use to initialize mutables.
+--
+-- if there was a previous new,
+-- it is invoked on the new
+-- object *after* more, because
+-- this works better with the
+-- `more` impls i use.
+function mknew(tt, more)
+ local mt, oldnew = { __index = tt }, tt.new
+ tt.new = function(ret)
+  if (not ret) ret = {}
+  if (more) more(ret)
+  if (oldnew) oldnew(ret)
+  setmetatable(ret, mt)
+  return ret
+ end
+end
+
+function _init()
+ pal(1,129,1)
+ the_ship = ship.new()
+ constraints:setup()
+ slomo = 1
+ sloc = 0
+ reroll()
+end
+
+function reroll()
+ frames=0
+ sloc=0
+ the_ship:reroll()
+end
+
+function _update60()
+ if (btnp(4)) reroll()
+ if (btnp(5)) constraints:cycle()
+ if (btnp(3)) slomo <<= 1
+ if (btnp(2)) slomo >>= 1
+ slomo = (slomo < 1) and 1 or (slomo > 8192) and 8192 or slomo
+ sloc += 1
+ if sloc >= slomo then
+  frames += 1
+  the_ship:update()
+  sloc=0
+ end
+end
+
+function _draw()
+ cls(1)
+ constraints:draw()
+ the_ship:draw()
+ print("frames: " .. frames, 4, 64, 7)
+ print("speed: 1/" .. slomo, 8, 70, 7)
+
+ print("thrust: ".. actual_t, 4, 80, 7)
+ meter(80, 80, 128, 84, actual_t/the_ship.thrust/2)
+ print("dx: ".. the_ship.dx, 20, 86, 7)
+ meter(80, 86, 128, 90, the_ship.dx/the_ship.maxspd/2)
+ print("x: "..the_ship.x, 24, 92, 7)
+ print("bx: "..gbx, 20, 98, 7)
+
+ print("xmin:"..tostr(constraints.xmin), 12, 108, 7)
+ print("xmax:"..tostr(constraints.xmax), 12, 114, 7)
+end
+
+function meter(x0, y0, x1, y1, frac)
+ local c = 11
+ if frac < 0 then
+  frac = -frac
+  c = 8
+ end
+ local range = x1-x0
+ local midpoint = x0 + (range/2)
+ rectfill(x0, y0-1, x0, y1+1, 13)
+ rectfill(midpoint, y0-1, midpoint, y1 + 1, 13)
+ local width = range * frac
+ if (width ~= 0) rectfill(x0, y0, x0 + width, y1, c)
+end
+
+-->8
+-- ship
+
+ship = {
+ maxspd=4,
+ thrust=0.25,
+ drag=0.0625,
+ y=32,
+}
+mknew(ship)
+
+function ship:reroll()
+ self.x=rnd(128)
+ self.dx=rnd(2*self.maxspd)-self.maxspd
+end
+
+function ship:draw()
+ if self.x < -7 then
+  spr(2, 0, self.y-7)
+  spr(2, 0, self.y+8)
+ elseif self.x > 127 then
+  spr(2, 120, self.y-7, 1, 1, true)
+  spr(2, 120, self.y+8, 1, 1, true)
+ else
+  spr(1,self.x,self.y)
+ end
+
+ --if (self.dx == 0) return
+ local bd, f = brake_dist(self.dx, self.thrust + self.drag)
+ gbx = self.x+bd
+ spr(3, gbx-2,self.y-2)
+ print(tostr(f), gbx-2, self.y - 8, 14)
+end
+
+function calc_velocity(v0, t, vmax, drag)
+ v0 = mid(v0 + t, vmax, -vmax)
+ return v0 - mid(drag, -drag, v0)
+end
+
+function ship:update()
+ local t = btn(0) and -1 or btn(1) and 1 or 0
+ t *= self.thrust
+ t = constraints:constrain(self, t)
+ -- t = constraints:constrain(self, t)
+ -- t = constraints:constrain(self, t)
+ local s = calc_velocity(self.dx, t, self.maxspd, self.drag)
+
+ self.x += s
+ self.dx = s
+ actual_t = t
+end
+
+-->8
+-- constraints
+
+constraints = {
+ ymin=20,
+ ymax=52,
+ color=10
+}
+
+function constraints:constrain(s, want)
+ self.color=10
+ if (not self.xmin) return want
+
+ -- bmx: brake max
+ local v1, bmx = calc_velocity(s.dx, want, s.maxspd, s.drag), s.thrust + s.drag
+ local bd, bf = brake_dist(v1, bmx)
+ local bx, txm = s.x + bd + v1, self.xmax
+ if bx < self.xmin then
+  -- predicted brake point left
+  -- of xmin; apply max reverse
+  -- thrust, treat xmin as our
+  -- max target, and handle
+  -- overbraking by coalescing
+  -- with past +xmax case
+  self.color = 9
+  want = s.thrust
+  txm = self.xmin
+  v1 = calc_velocity(s.dx, want, s.maxspd, s.drag)
+  bd, bf = brake_dist(v1, bmx)
+  bx  = bd + s.x + v1
+ end
+ if (bx <= txm) return want
+ self.color = 8
+ local overage = bx - txm
+ want -= overage/max(bf,1)
+ if (want < -s.thrust) want = -s.thrust
+ return want
+end
+
+function brake_dist(v0, brake_max)
+ local tri_frames = abs(v0\brake_max)
+ local chunks = tri_frames * (tri_frames - 1) >> 1
+ local chunk_zone = chunks * brake_max
+ local overage = abs(v0) - tri_frames * brake_max
+ return (chunk_zone + overage * (tri_frames + 1)) * sgn(v0), (overage > 0) and tri_frames + 1 or tri_frames
+end
+
+function constraints:cycle()
+ if self.ctype=="bounds" then
+  self.ctype="point"
+ elseif self.ctype=="point" then
+  self.ctype="off"
+ else
+  self.ctype="bounds"
+ end
+ self:setup()
+end
+
+function constraints:setup()
+ if self.ctype=="point" then
+  self.xmin = 64
+  self.xmax = 64
+ elseif self.ctype=="bounds" then
+  self.xmin = 32
+  self.xmax = 96
+ else
+  self.xmin = nil
+  self.xmax = nil
+ end
+end
+
+function constraints:draw()
+ if (not self.xmin) return
+ rect(self.xmin, self.ymin, self.xmax, self.ymax, self.color)
+end
+
+-->8
+-- fx
+
+-- todo: spark ring buffer
+
+__gfx__
+000000008000000000080000a000a000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+00000000006666000080000009090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+00000000067777600800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+00000000675555758008888009090000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+000000006750007508000000a000a000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+00000000067777500080000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000
+00000000005555000008000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000

code-of-conduct.md

@@ -0,0 +1 @@
+Trans rights.

genericshmup.p8

@@ -75,7 +75,7 @@ function updategame()
 	edeaths = {}
 	for ip, ps in ipairs(pships) do
 	 for ie, eb in ipairs(ebullets) do
-	  if collides(hurtobx(ps), hurtbox(eb)) then
+	  if collides(hurtbox(ps), hurtbox(eb)) then
 	   if (eb:hitship(ps)) add(edeaths, ie)
 	   if ps:hitbullet(eb) then
 	    add(pdeaths, ip)

updatedshmup.p8

@@ -397,23 +397,6 @@ function dropshadow(str, x, y, col)
  print(str, x, y, col)
 end
 
-function grab_p1_butts()
- if state ~= game then
-  local r = {0,0,0,0,0}
-  r[0] = 0
-  return r
- end
- local b = btn()
- return {
-  [0]=b&0x1,
-  [1]=(b&0x2)>>1,
-  [2]=(b&0x4)>>2,
-  [3]=(b&0x8)>>3,
-  [4]=(b&0x10)>>4,
-  [5]=(b&0x20)>>5
- }
-end
-
 -->8
 --ship behavior
 
@@ -448,19 +431,19 @@ end
 function ship_m:move()
  self:refresh_shield()
  self.power = min(self.max_power, self.power + self.generator)
- butt = self:grab_butts()
+ local dx, dy, shoot_spec, shoot_main = self:act()
- if (butt[5] > 0) self:maybe_shoot(self.main_gun)
+ if (shoot_main) self:maybe_shoot(self.main_gun)
- if (butt[4] > 0) self:maybe_shoot(self.special_gun)
+ if (shoot_spec) self:maybe_shoot(self.special_gun)
- if (butt[0]-butt[1] ~= 0 or butt[2]-butt[3] ~= 0) spark(self.sparks, self.x + 4*self.size, self.y + 4*self.size, butt, self.thrust, self.sparkodds)
+ if (dx ~= 0 or dy ~= 0) spark(self.sparks, self.x + 4*self.size, self.y + 4*self.size, dx*2.5, dy*2.5, self.sparkodds)
- self.xmomentum += (self.thrust * butt[1]) - (self.thrust * butt[0])
+ self.xmomentum += dx
- self.ymomentum += (self.thrust * butt[3]) - (self.thrust * butt[2])
+ self.ymomentum += dy
  self.xmomentum = mid(-self.maxspd, self.maxspd, self.xmomentum)
  self.ymomentum = mid(-self.maxspd, self.maxspd, self.ymomentum)
  
  self.x += self.xmomentum
  self.y += self.ymomentum
  
- if self == primary_self then
+ if self == primary_ship then
   self.x = mid(0, 112 - 8 * self.size, self.x)
   self.y = mid(0, 128 - 8 * self.size, self.y)
  end
@@ -869,16 +852,18 @@ player = ship_m.new{
  thrust = 0.25, -- momentum added from button
  drag = 0.125, -- momentum lost per frame
  slip = false, -- does not slide down screen
- grab_butts = function(self)  -- fetch buttons
+ act = function(self)  -- fetch buttons
-  local butts = grab_p1_butts()
+  local b,th = btn(),self.thrust
-  if butts[0] == butts[1] then
+  local blr = b&0x3
-   self.sprite = 1
+  if blr == 1 then
-  elseif butts[0] > 0 then
    self.sprite=17
-  else
+  elseif blr==2 then
    self.sprite=18
+  else
+   self.sprite=1
   end
-  return butts
+  --dx, dy, shoot_spec, shoot_main
+  return (((b&0x2)>>1) - (b&0x1)) * th, (((b&0x8)>>3) - ((b&0x4)>>2)) * th, (b&0x10) > 0, (b&0x20) > 0
  end
 }
 mknew(player,
@@ -912,18 +897,12 @@ frownie = ship_m.new{
  thrust = 0.12, -- momentum added from button
  drag = 0.07, -- momentum lost per frame
  slip = true,
- grab_butts = function(discard_self)
+ act = function(self)
-  -- buttons are effectively analog
+  local tstate,dx = (1 + flr(4*t() + 0.5)) % 6,0
-  -- and negative buttons work just fine!
+  if (tstate==1 or tstate==2) dx=-self.thrust
-  local butts = {}
+  if (tstate>=4) dx=self.thrust
-  local tstate = (1 + flr(4*t() + 0.5)) % 6
+  return dx,0,false,false
-  butts[0] = ((tstate==1 or tstate==2) and 1) or 0
+ end,
-  butts[1] = ((tstate==4 or tstate==5) and 1) or 0
-  for b=2, 5 do
-   butts[b]=0
-  end
-  return butts
- end, -- button fetch algorithm
 }
 mknew(frownie)
 
@@ -962,10 +941,9 @@ spewy = frownie.new{
  generator=0.5,
  fire_off_x=4,
  fire_off_y = 7,
- grab_butts=function()
+ act=function(self)
-  local butts=frownie.grab_butts()
+  local dx,dy,shoot_spec=frownie.act(self)
-  butts[5]=1
+  return dx, dy, shoot_spec, true
-  return butts
  end
 }
 mknew(spewy, function(ship)
@@ -1000,12 +978,11 @@ mknew(chasey, function(ship)
  ship.main_gun=ship.main_gun or zap_gun.new{enemy=true}
 end)
 
-function chasey:grab_butts()
+function chasey:act()
- local butts = {[0]=0,0,0,0,0,0}
+ local dx = 0
- if (self.x < primary_ship.x) butts[1] = 1
+ if (self.x < primary_ship.x) dx=self.thrust
- if (self.x > primary_ship.x) butts[0] = 1
+ if (self.x > primary_ship.x) dx=-self.thrust
- if (self.x - 16 < primary_ship.x and self.x + 16 > primary_ship.x) butts[5] = 1
+ return dx, 0, false, self.x - 16 < primary_ship.x and self.x + 16 > primary_ship.x
- return butts
 end
 
 xl_chasey=chasey.new{
@@ -1021,10 +998,10 @@ xl_chasey=chasey.new{
  shield = 5,
  boss = true,
  slip = false,
- grab_butts = function(self)
+ act = function(self)
-  local butts = chasey.grab_butts(self)
+  local dx,dy,shoot_spec,shoot_main = chasey.act(self)
-  if (self.y < 4) butts[3] = 1
+  if (self.y < 4) dy=self.thrust
-  return butts
+  return dx,dy,shoot_spec,shoot_main
  end,
  draw = function(self)
   if(self.fx_pal) pal(self.fx_pal)
@@ -1308,7 +1285,7 @@ end
 function spawn_goodie(goodie_name, x, y, sz)
  if (not goodie_name or #goodie_name == 0) return
  local sh = sz and sz/2 or 0
- goodies[goodie_name].new{}:spawn_at(x+sh,y+sh)
+ _ENV[goodie_name].new{}:spawn_at(x+sh,y+sh)
 end
 
 function multi(times, interval, fnm, ...)
@@ -1510,18 +1487,12 @@ like a player pushing buttons.
 the player ship actually reads
 buttons for this.
 
-grab_butts - ship thrust control
+act -- returns new acceleration:
-based on btn() api. returns a
+dx, dy, shoot_spec, shoot_main.
-table indexed from 0..5 with
+dx and dy are change in momentum
-0 to not push this button and 1
+in px/frame. this is controls
-to push it. ships can use
+only -- friction is handled in
-fractional or out-of-range
+ship:move (`drag` value).
-numbers to get varying amounts
-of thrust, including using
-negative numbers for thrust in
-the opposite direction. 4 and 5
-just check for nonzeroness to
-attempt to fire.
 
 ships hitting another ship take
 1 damage per frame of overlap.
@@ -1800,9 +1771,7 @@ function boom(x,y,boominess,is_boss)
  local boombonus = min(0.05 * boominess, 1.25)
  for _=1,boominess do
   local angle = rnd(1)
-  local butts = {0, sin(angle), 0}
+  spark(sp,x+4,y+4,cos(angle), sin(angle),boombase+rnd(boombonus),1, true)
-  butts[0] = cos(angle)
-  spark(sp,x+4,y+4,butts,boombase+rnd(boombonus),1, true)
  end
  return
 end
@@ -1822,17 +1791,16 @@ function spark_particle:draw()
  pset(self.x,self.y,self.sprs[self.sidx])
 end
 
-function spark(sprs, x, y, butts, thrust, odds, fg)
+function spark(sprs, x, y, dx, dy, odds, fg)
  if (sprs==nil or flr(rnd(odds)) ~= 0) return
- thrust *= 2.5
  local target = fg and intangibles_fg or intangibles_bg
  target:push_back(spark_particle.new{
   x = x + rnd(4) - 2,
   y = y + rnd(4) - 2,
   sprs = sprs,
   sidx = 1,
-  dx = (butts[0] - butts[1]) * thrust + rnd(2) - 1,
+  dx = dx + rnd(2) - 1,
-  dy = (butts[2] - butts[3]) * thrust + rnd(2) - 1,
+  dy = dy + rnd(2) - 1,
  })
 end
 -->8