Add Ika weaponry, lots of cleanup, new art assets.

src/enemy/ebi.lua

@@ -5,12 +5,12 @@ import "CoreLibs/sprites"
 import "entity"
 
 local gfx <const> = playdate.graphics
+local geom <const> = playdate.geometry
 
 class("Ebi").extends(Entity)
 
 function Ebi:init()
-   local img = gfx.image.new(10, 10, gfx.kColorBlack)
-   Ebi.super.init(self, img, 5)
+   Ebi.super.init(self, gfx.image.new("images/ebi.png"), 5)
 
    self:setCollidesWithGroupsMask(0x3)
    local dir = 1
@@ -18,11 +18,11 @@ function Ebi:init()
       dir = -1
    end
 
-   self.vector = {x=0, y=dir}
+   self.vector = geom.vector2D.new(0, dir)
 
    self.weaponTimer = playdate.timer.new(2500,
       function()
-         local b = Bullet(2, 1, {x=-1, y=0}, 0x2)
+         local b = Bullet(2, 1)
          b:moveTo(self.x - (self.width/2) - 1, self.y)
          b:add()
       end
@@ -34,7 +34,7 @@ function Ebi:update()
    local collisions = Ebi.super.update(self)
    for i=1, #collisions, 1 do
       if collisions[i].other:getGroupMask() == 0x1 then
-         self.vector.y *= -1
+         self.vector.dy *= -1
       end
    end
 end

src/enemy/ika.lua

@@ -2,13 +2,33 @@
 import "CoreLibs/object"
 import "CoreLibs/graphics"
 import "CoreLibs/sprites"
+import "CoreLibs/timer"
 import "entity"
 
 local gfx <const> = playdate.graphics
+local geom <const> = playdate.geometry
 
 class("Ika").extends(Entity)
 
-function Ika:init()
-   local img = gfx.image.new(50, 50, gfx.kColorBlack)
-   Ika.super.init(self, img, 25, 1)
+function Ika:init(target)
+   Ika.super.init(self, gfx.image.new("images/ika.png"), 25, 1)
+
+   self:setCollidesWithGroupsMask(0x2)
+
+   self.weaponTimer = playdate.timer.new(7000,
+      function()
+         local b = Bullet(9, 20, self:calculateVector(target))
+         b:moveTo(self.x - (self.width/2) - 1, self.y)
+         b:add()
+      end
+   )
+   self.weaponTimer.repeats = true
+end
+
+function Ika:calculateVector(target)
+   local vec = geom.vector2D.new(0,0)
+   vec.dx = target.x - self.x
+   vec.dy = target.y - self.y
+
+   return vec:normalized() * 3
 end