demos/tutorial/scripts/MyObj.lua

   1 MyObj = Object:new()
   2
   3 MyObj.type = "MyObj"
   4 MyObj.rects = ObjectList:new()
   5 MyObj.image, MyObj.w, MyObj.h = get_image("data/images/wikilogo.png")
   6
   7 function MyObj:new(o)
   8   o = o or {}
   9   setmetatable(o, self)
  10   self.__index = self
  11   return o
  12 end
  13
  14 function MyObj:reflect_x()
  15   self.angle = (-1 * self.angle) + 180
  16   self.angle = self.angle % 360
  17 end
  18
  19 function MyObj:reflect_y()
  20   self.angle = -1 * self.angle
  21   self.angle = self.angle % 360
  22 end
  23
  24 function MyObj:update(delta)
  25   Object.update(self, delta)
  26
  27   --this code is what makes it bounce
  28   local cx, cy = Object.get_center(self)
  29
  30   if cx <= 0 then
  31     self.x = 0 - math.floor(self.w/2)
  32     self:reflect_x()
  33   end
  34
  35   if cx >= s_width then
  36     self.x = s_width - math.floor(self.w/2)
  37     self:reflect_x()
  38   end
  39
  40   if cy <= 0 then
  41     self.y = 0 - math.floor(self.h/2)
  42     self:reflect_y()
  43   end
  44
  45   if cy >= s_height then
  46     self.y = s_height - math.floor(self.h/2)
  47     self:reflect_y()
  48   end
  49 end
  50
  51 --silly
  52 function MyObj:collide(ids, object)
  53   print("Ouch! You hit me, "..object.type.." at "..os.time().."!")
  54 end