Refactor targeting code into a utility function, add reverse images until we add code to do that programmatically.

src/enemy/ika.lua

@@ -19,7 +19,7 @@ function Ika:init(target)
 end
 
 function Ika:onReady()
-   self.weaponTimer = playdate.timer.new(7000,
+   self.weaponTimer = playdate.timer.new(5000,
       function()
          local b = Bullet(10, 20, self:calculateVector(self.target))
          b:moveTo(self.x - (self.width/2) - 1, self.y)
@@ -30,7 +30,9 @@ function Ika:onReady()
 end
 
 function Ika:calculateVector(target)
-   return util.unitPointer(self:getPosition(), target:getPosition()) * 5
+   local x1,y1 = self:getPosition()
+   local x2,y2 = target:getPosition()
+   return util.unitPointer(x1,y1,x2,y2) * 5
 end
 
 function Ika:remove()

src/util.lua

@@ -6,14 +6,18 @@ local geom <const> = playdate.geometry
 
 util = {}
 
--- creates a unit vector that "points" from point A to point B
-function util.unitPointer(a, b)
-   return (b - a):normalized()
+-- create a unit vector that points from x1, y1 to x2, y2
+-- alternately you can pass 2 playdate.geometry.point() objects instead
+function util.unitPointer(x1, y1, x2, y2)
+   local a = nil 
+   local b = nil 
+   if type(x1) == "number" then
+      a = geom.point.new(x1, y1)
+      b = geom.point.new(x2, y2)
+   else
+      a = x1
+      b = y1
    end
 
--- create a unit vector that points from x1, y1 to x2, y2
-function util.unitPointer(x1, y1, x2, y2)
-   local a = geom.point.new(x1, y1)
-   local b = geom.point.new(x2, y2)
-   return unitPointer(a,b)
+   return (b-a):normalized()
 end