How do I make them move

Minstrel

Hello guys. For this post I'm moving away from all the insanely 'complex' pool stuff and focusing on something much, much simpler. Getting a layer of sprites to move across the screen. I have already configured the sprites in a layer I just need the code for moving them across the screen and bouncing when the furthest sprite hits the edge.
I have the sprites in the layer configured like this: (edge) 1 O O O O O O O O 1 (edge)
Oh and if you need to consult it here is the code for the layer and for 'spawning' the sprite.

Invader = Core.class(Sprite)   function Invader:init()   local anim1 = {} anim1[1] = Bitmap.new(Texture.new("invader2.png")) anim1[2] = Bitmap.new(Texture.new("invader.png"))   local anim1 = MovieClip.new{ {1,20, anim1[1]}, {20,40, anim1[2]}, anim1[1]:setScale(0.3) }   anim1:setPosition(0,-5) self:addChild(anim1) anim1:setGotoAction(40, 1)   anim1:gotoAndPlay(1) end   local maxInvaders = 10     local invaders = {} invadersLayer = Sprite.new() stage:addChild(invadersLayer)   local paddx = 75 for i=1, maxInvaders do invaders[i] = Invader.new() invaders[i]:setX(paddx*i) invadersLayer:addChild(invaders[i]) invadersLayer:setScale(0.5) invadersLayer:setPosition(0 ,25)   end

Also, if possible, can you tell me why you've told me to do what you've told me to do, as any one can copy and paste code, so I want to actually understand why I'm doing things.
Thanks for your time!

pie

@Minstrel what do you think it's "insanely complex" about the pool stuff? it's pretty straightforward

you should already know how to move the invadersLayer: you're already moving sprites on screen (think about the bullets). You just need to set some limits (as you did on the ship).

Somewhere at the beginning, where you set defaults, you need to set a default direction for the invadersLayer: this will help later, while checking the limits.

layerstartDir = "LTR" --Left to right as starting direction

in your gameloop

local layerX = invadersLayer:getX() --get actual invadersLayer position   if layerstartDir == "LTR" and layerX<= 100 then --100 is my choice, it's the x position where layer movement direction should revert when moving LTR invadersLayer:setX(layerX+1) -- where 1 is the pixel speed at which layer moves Left to right else --we reached the limit, change direction layerstartDir = "RTL" --right to left end   if layerstartDir == "RTL" and layerX>= -50 then -- -50 is my choice, it's the x position where layer direction should reverse at the left of the screen when moving RTL invadersLayer:setX(layerX-1) -- same as before, but negative else --same as before layerstartDir = "LTR" -- left to right end

Minstrel

Oh ok. What you've said here makes a lot more sense than what I did:
invadersLayer:setPosition(getPosition()+5)

Also I'm a newbie not realising I'd already done it
BTW You may find pool stuff easy but for me it's hard -_-

Minstrel

Also I, again really appreciate you explaining it, as, as I said earlier anyone can copy and paste but not everyone takes the time to know what the code means.