Scene manager-no such thing as "easing.outback"

Zizanyman

I am using scene manager ( I made sure to add the scene manager code as SceneManager.lua) , and when I use this line, it comes out with an error:

sceneManager:changeScene("start", 1, SceneManager.moveFromRight, easing.outBack)

This is the error:

main.lua:7: attempt to index global 'easing' (a nil value)
stack traceback:
main.lua:7: in main chunk

If anybody could explain what "easing" is and why it comes up with an error, that would be great.

jdbc

You need easing.lua file

Zizanyman

@jdbc All right, that fixed that problem, now it says:

SceneManager.lua:266: attempt to index field '?' (a nil value)
stack traceback:
SceneManager.lua:266: in function 'changeScene'
main.lua:7: in main chunk

talis

Are you sure you defined the scene before changing to it?
It seems that you are trying to change a scene that is not existed.

Zizanyman

@jdbc and @talis I'm pretty sure I'm following the tutorials the right way. Here is my entire code:

sceneManager = SceneManager.new({
["start"] = start,
["mode_select"] = mode_select
})
stage:addChild(sceneManager)

start = gideros.class(Sprite)
sceneManager:changeScene("start", 1, SceneManager.moveFromRight, easing.outBack)

function start:init()
local background = Bitmap.new(Texture.new("Space_Background.jpg"))
stage:addChild(background)
end

yubaro

Try this:

main.lua

sceneManager = SceneManager.new({ ["start"] = start, ["mode_select"] = mode_select }) stage:addChild(sceneManager)   sceneManager:changeScene("start", 1, SceneManager.moveFromRight, easing.outBack)

start.lua

start = gideros.class(Sprite)   function start:init() local background = Bitmap.new(Texture.new("Space_Background.jpg")) self:addChild(background) end

Zizanyman

Thanks so much @yubaro! I guess I have to make a different file for the different scenes.

hgy29

@Zizanyman, @yubaro solution is indeed the cleanest way to go, one don't want to put everything in main.lua, but your issue lies in the order of the declarations in your main.lua. For instance, in your code your give to the SceneManager a start variable that has no value yet.

Writing your code as:

start = gideros.class(Sprite) sceneManager:changeScene("start", 1, SceneManager.moveFromRight, easing.outBack)   function start:init() local background = Bitmap.new(Texture.new("Space_Background.jpg")) stage:addChild(background) end   sceneManager = SceneManager.new({ ["start"] = start, ["mode_select"] = mode_select }) stage:addChild(sceneManager)

would have done the trick too. @yubaro solution works because main.lua is guaranted to always be the latest lua file parsed.