Array Issues

Cyberience

Code is simple, but getting a message of attempt to index global 'assets' (a nil value) on the dots line. There must be somthing blaringly obvious here, but I cant see it. any ideas?

local dots = { assets:init("./images/1.png")}

function assets:init(texture)
local bitmap = Bitmap.new(Texture.new(texture))
self:addChild(bitmap)
end

OZApps

A couple of things

1. What is assets? you need to have that instantiated before you use it. So adding a line like

assets = {}

would help
2. You need to position the line

local dots = ...

after the function declaration
3. Since you are using

self:addChild

, you need that assets is an object that is has the addChild function. So the line we added in #1 needs to change to

assets = Core.class(Sprite).new()

then this should work for you.

Cyberience

well, slap me with a wet fish, I am moving away from javascript, and stumbling into the way od doing things properly again, thanks. it hard trying to find working examples or a good reference book to show how its done.

BJG

I don't understand what this code is supposed to do. I was wondering if you intended something more like this...(but I'm probably talking nonsense...)

Assets = Core.class(Sprite) function Assets:init(texture) local bitmap = Bitmap.new(Texture.new(texture)) self:addChild(bitmap) end local dots = {Assets.new("./images/1.png")}

Otherwise, what is the idea of:

local dots = { assets:init("./images/1.png")}

(Just a novice here.)

john26

I agree with @BJG. Also I think it should be

local dots=Assets.new("/images/1.png")

No need for curly brackets here I think (unless you really want dots to be a table whose first element is the newly-created asset.)

I have used "/" not "./" as I think this is more correct. Gideros will automatically load your file from the Resources directory. The "." directory is really only meaningful when using a command prompt/Xterm window.

Cyberience

yes, I get your meaning about the ./. thanks for that, as in terms of use, I am making an array of dots,, of which I solved the problem already, I needed to initialise the Assets class to work,

Cyberience

the way it is now, and working is like this for reference, and hopefully will help others was like this.

assets = Core.class(Sprite)

function assets:init(texture)
local bitmap = Bitmap.new(Texture.new(texture))
bitmap:setAnchorPoint(0.5, 0.5)
self:addChild(bitmap)
end

dots = { assets.new("./images/1.png"),
assets.new("./images/2.png"),
assets.new("./images/3.png"),
assets.new("./images/4.png"),
assets.new("./images/5.png") }

local function onTouchesBegin(event)
local dot = dots[event.touch.id]
if dot then
stage:addChild(dot)
dot:setPosition(event.touch.x, event.touch.y)
end
end

stage:addEventListener(Event.TOUCHES_BEGIN, onTouchesBegin)

Theres more, like on move and touch end, but the above code is a complete cycle and works nice......