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

    ZizanymanZizanyman Member
    edited February 2015 in General questions
    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. :)
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    Comments

    • jdbcjdbc Member
      You need easing.lua file
      lua
      lua
      easing.lua
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    • ZizanymanZizanyman Member
      edited February 2015
      @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
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    • talistalis Guru
      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.
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    • ZizanymanZizanyman Member
      edited February 2015
      @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
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    • yubaroyubaro Member
      Accepted Answer
      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



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    • ZizanymanZizanyman Member
      Thanks so much @yubaro! :D I guess I have to make a different file for the different scenes.
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    • hgy29hgy29 Maintainer
      @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.
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