complete conversion to new

updatedshmup.p8

@@ -118,10 +118,8 @@ function linked_list:pop_front()
 end
 
 function _init()
- init_bullet_mt()
- init_powerup_mt()
 	wipe_level()
-	primary_ship.main_gun = new_gun_of(zap_gun_t)
+	primary_ship.main_gun = zap_gun.new()
 	load_level(example_level)
 	state = game
 	pal(2,129)
@@ -214,7 +212,7 @@ function updategame()
 
 	-- many bullets and many enemy ships;
 	-- use bucket collider for efficiency
- local pbullet_collider = new_collider()
+ local pbullet_collider = collider.new()
  local p, n = pbullets, pbullets.next
  while n do
   n.prev = p
@@ -633,7 +631,7 @@ player = ship_m.new{
 }
 mknew(player,
  function(p)
-  p.main_gun = new_gun_of(zap_gun_t, false)
+  p.main_gun = zap_gun.new()
  end
 )
 
@@ -714,7 +712,7 @@ function spawn_spewy_at(x, y)
 	 hp = 1,
 	 maxpower = 70,
 	 generator = 0.5,
-	 main_gun = new_gun_of(protron_gun_t, true),
+	 main_gun = protron_gun.new{enemy=true},
 	 fire_off_x = 4,
 	 fire_off_y = 7,
 	 grab_butts = function()
@@ -766,7 +764,7 @@ function spawn_chasey_at(x, y)
  local c = chasey.new{
   x = x,
   y = y,
-  main_gun = new_gun_of(zap_gun_t, true)
+  main_gun = zap_gun.new{enemy=true},
  }
  eships:push_back(c)
  return c
@@ -788,7 +786,7 @@ function spawn_xl_chasey_at(x, y)
   shield = 5,
   boss = true,
   slip = false,
-  main_gun = new_gun_of(zap_gun_t, true),
+  main_gun = zap_gun.new{enemy=true},
   grab_butts = function(self)
    local butts = chasey.grab_butts(self)
    if (self.y < 4) butts[3] = 1
@@ -817,16 +815,12 @@ function collides(box1, box2)
 end
 
 collider = { }
-collider_t = {
+mknew(collider,
- __index = collider
+ function(x)
-}
+  x.suppress = {}
-
-function new_collider()
- local c = { }
- setmetatable(c, collider_t)
- c.suppress = { }
- return c
  end
+)
+
 function collider_indexes(box)
  local ret = {}
  for x = box.x\8, (box.x+box.width)\8 do
@@ -1007,9 +1001,9 @@ end
 
 function spawn_bonus_vulcan_chasey()
  local c = spawn_chasey()
- c.main_gun=new_gun_of(vulcan_gun_t, true)
+ c.main_gun=vulcan_gun.new{enemy=true}
  c.die = function(self)
-  spawn_main_gun_at(self.x-1, self.y-1, vulcan_gun_t)
+  spawn_main_gun_at(self.x-1, self.y-1, vulcan_gun)
   chasey.die(self)
  end
  c.sprite=4
@@ -1060,7 +1054,7 @@ example_level = {
  [200]=spawn_chasey,
  [250]=spawn_blocking_blocky,
  [285]=function()
-  spawn_spec_gun_at(35, -11, blast_gun_t)
+  spawn_spec_gun_at(35, -11, blast_gun)
  end,
  [310]=function()
   spawn_blocking_blocky()
@@ -1069,7 +1063,7 @@ example_level = {
  end,
  [311]=spawn_frownie,
  [350]=function()
-  spawn_main_gun_at(70, -11, protron_gun_t)
+  spawn_main_gun_at(70, -11, protron_gun)
  end,
  [401]=spawn_frownie,
  [420]=spawn_blocking_frownie,
@@ -1096,26 +1090,7 @@ example_level = {
 -->8
 -- bullets and guns
 
-function init_bullet_mt()
+zap = bullet_base.new{
- setmetatable(zap, bullet_t)
- setmetatable(zap_gun, gun_t)
- setmetatable(blast, bullet_t)
- setmetatable(blast_gun, gun_t)
- setmetatable(protron, bullet_t)
- setmetatable(protron_gun, gun_t)
- setmetatable(vulcan, bullet_t)
- setmetatable(vulcan_gun, gun_t)
-end
-
-function new_gun_of(mt, is_enemy)
- local g = {
-  enemy = is_enemy
- }
- setmetatable(g, mt)
- return g
-end
-
-zap = {
  --shape
  psprite = 8, --index of player ammo sprite
  esprite = 9, -- index of enemy ammo sprite
@@ -1139,23 +1114,18 @@ zap = {
   return true
  end
 }
-zap_t = {
+mknew(zap)
- __index = zap
-}
 
-zap_gun = {
+zap_gun = gun_base.new{
  enemy = false,
  power = 20, -- power consumed per shot
  cooldown = 10, -- frames between shots
  ammo = nil, -- unlimited ammo - main gun
- t = zap_t -- metatable of bullet to fire
+ t = zap -- metatable of bullet to fire
 }
+mknew(zap_gun)
 
-zap_gun_t = {
+blast = bullet_base.new{
- __index = zap_gun
-}
-
-blast = {
  --shape
  psprite = 12, --index of player ammo sprite
  esprite = 3, -- index of enemy ammo sprite
@@ -1200,25 +1170,20 @@ blast = {
   end
  end
 }
-blast_t = {
+mknew(blast)
- __index = blast
-}
 
-blast_gun = {
+blast_gun = gun_base.new{
  icon = 13,
  enemy = false,
  power = 0, -- ammo, not power
  cooldown = 30, -- frames between shots
  ammo = 5,
  maxammo = 5,
- t = blast_t -- metatable of bullet to fire
+ t = blast -- type of bullet to fire
 }
+mknew(blast_gun)
 
-blast_gun_t = {
+protron = bullet_base.new{
- __index = blast_gun
-}
-
-protron = {
  --shape
  psprite = 23, --index of player ammo sprite
  esprite = 24, -- index of enemy ammo sprite
@@ -1238,11 +1203,9 @@ protron = {
  dx = 0,  -- px/frame
  dy = 3,
 }
-protron_t = {
+mknew(protron)
- __index = protron
-}
 
-protron_gun = {
+protron_gun = gun_base.new{
  icon = 25,
  enemy = false,
  power = 35,
@@ -1253,38 +1216,32 @@ protron_gun = {
   local sprite = protron.psprite
   if (self.enemy) sprite=protron.esprite
   for i=1,3 do
-   local b = {
+   local b = protron.new{
     enemy=self.enemy,
     sprite=sprite,
     dx = i,
     dy = 4-i
    }
-   setmetatable(b, protron_t)
    b:spawn_at(x,y)
-   local b2 = {
+   local b2 = protron.new{
     enemy=self.enemy,
     sprite=sprite,
     dx = -i,
     dy = 4-i
    }
-   setmetatable(b2, protron_t)
    b2:spawn_at(x,y)
   end
-  local bup = {
+  local bup = protron.new{
    enemy=self.enemy,
    sprite=sprite,
    dy=4
   }
-  setmetatable(bup, protron_t)
   bup:spawn_at(x,y)
  end
 }
+mknew(protron_gun)
 
-protron_gun_t = {
+vulcan = bullet_base.new{
- __index = protron_gun
-}
-
-vulcan = {
  --shape
  psprite = 22, --index of player ammo sprite
  esprite = 21, -- index of enemy ammo sprite
@@ -1304,10 +1261,9 @@ vulcan = {
  dx = 0,  -- px/frame
  dy = 4,
 }
-vulcan_t = {
+mknew(vulcan)
- __index = vulcan
+
-}
+vulcan_gun = gun_base.new{
-vulcan_gun = {
  icon = 37,
  enemy = false,
  power = 8,
@@ -1319,20 +1275,17 @@ vulcan_gun = {
  dxidx = 1,
  actually_shoot = function(self, x, y)
   local sprite = self.enemy and vulcan.esprite or vulcan.psprite
-  local b = {
+  local b = vulcan.new{
    enemy=self.enemy,
    sprite=sprite,
    dx = self.dxs[self.dxidx],
   }
-  setmetatable(b, vulcan_t)
   b:spawn_at(self.xoffs[self.dxidx]+x,y)
   self.dxidx += 1
   if (self.dxidx > #self.dxs) self.dxidx = 1
  end
 }
-vulcan_gun_t = {
+mknew(vulcan_gun)
-  __index = vulcan_gun
-}
 
 -->8
 -- bullet and gun behaviors
@@ -1340,20 +1293,13 @@ vulcan_gun_t = {
 bullet_base = {
 	enemyspd = 0.5
 }
-
+mknew(bullet_base)
-bullet_t = {
- __index = bullet_base
-}
 
 gun_base = { 
  shoot_ready = -32768,
- 
  icon = 20
 }
-
+mknew(gun_base)
-gun_t = {
- __index = gun_base
-}
 
 function bullet_base:hitship(_)
  self:die()
@@ -1410,15 +1356,11 @@ function gun_base:shoot(x, y)
 end
 
 function gun_base:actually_shoot(x, y)
- b = { }
+ local typ = self.t
- setmetatable(b, self.t)
+ local b = typ.new{
- if self.enemy then
+  enemy = self.enemy,
-  b.enemy = true
+  sprite = self.enemy and typ.esprite or typ.psprite,
-  b.sprite = b.esprite
+ }
- else
-  b.enemy = false
-  b.sprite = b.psprite
- end
  b:spawn_at(x, y)
  return true
 end
@@ -1885,12 +1827,8 @@ function spark(sprs, x, y, butts, thrust, odds, fg)
 end
 -->8
 -- powerups
-function init_powerup_mt()
- setmetatable(powerup, bullet_t)
- setmetatable(gun_swap, powerup_t)
-end
 
-powerup = {
+powerup = bullet_base.new{
  -- animated sprite array: "sprites"
  -- to draw under or over anim,
  -- override draw, draw the
@@ -1912,14 +1850,11 @@ powerup = {
  anim_speed = 2,
  loop_pause = 30 -- affected by animspeed
 }
+mknew(powerup)
 
 -- sprite indexes for "sheen" animation
 sheen8x8 = split"2,54,55,56,57,58,59,60,61"
 
-powerup_t = {
- __index = powerup
-}
-
 -- todo: draw two sprites
 -- on top of each other here
 -- so all powerups can share
@@ -1935,8 +1870,7 @@ function powerup:draw()
      self.width, self.height) 
 end
 
-function spawn_repair_at(x, y)
+repair = powerup.new{
- local repair = {
  hurt = {
   x_off = -2,
   y_off = -2,
@@ -1957,18 +1891,20 @@ function spawn_repair_at(x, y)
   powerup.draw(self)
  end  
 }
- setmetatable(repair, powerup_t)
+mknew(repair)
- repair:spawn_at(x, y)
+
+function spawn_repair_at(x, y)
+ repair.new():spawn_at(x, y)
 end
 
-gun_swap = {
+gun_swap = powerup.new{
  hurt = {
   x_off = -2,
   y_off = -2,
   width = 16,
   height = 16
  },
- -- gun = new_gun_of(t, false)
+ -- gun = gun_type.new{}
  center_x_off = 6,
  top_y_off = 0,
  bottom_y_off = 4,
@@ -1985,15 +1921,12 @@ gun_swap = {
   spr(self.gun.icon, self.x+2, self.y+2, 1, 1)
  end
 }
-gun_swap_t = {
+mknew(gun_swap)
- __index=gun_swap
-}
 
-function spawn_main_gun_at(x, y, mt)
+function spawn_main_gun_at(x, y, gunt)
- local gun_p = {
+ local gun_p = gun_swap.new{
-  gun = new_gun_of(mt, false)
+  gun = gunt.new()
  }
- setmetatable(gun_p, gun_swap_t)
  gun_p:spawn_at(x, y)
 end
 
@@ -2003,9 +1936,9 @@ spec_gun_pl = {
  [2] = 14
 }
 
-function spawn_spec_gun_at(x, y, mt)
+function spawn_spec_gun_at(x, y, gunt)
- local gun_p = {
+ local gun_p = gun_swap.new{
-  gun = new_gun_of(mt, false),
+  gun = gunt.new(),
   hitship = function(self, ship)
    if (ship ~= primary_ship) return false
    ship.special_gun = self.gun
@@ -2018,7 +1951,6 @@ function spawn_spec_gun_at(x, y, mt)
    spr(self.gun.icon, self.x+2, self.y+2, 1, 1)
   end
  }
- setmetatable(gun_p, gun_swap_t)
  gun_p:spawn_at(x, y)
 end
 __gfx__