Beginner questions one object in multiple groups

Solar2D General Questions/Discussion
#1

I am trying to setup multiple groups for each of the scene of my game:

Group1 = Menu
Group2 = Play Scene etc.

I have some objects that really belong to both Groups such as the background. Unfortunately when I make one visible say the menu and the other one invisible then some of the objects that are supposed to be in the play scene obviously don’t appear. What’s the proper way to do this. Any suggestions?

Thanks
[import]uid: 8192 topic_id: 1785 reply_id: 301785[/import]

#2

Stacking order?

The items you create first are the “last” ones on the stacking order.

Maybe you have a stacking order issue?

Carlos
[import]uid: 24 topic_id: 1785 reply_id: 5302[/import]

#3

An object can only be in one group. But a background in its own group. [import]uid: 5712 topic_id: 1785 reply_id: 5303[/import]

#4

Can groups be part of other groups? [import]uid: 8192 topic_id: 1785 reply_id: 5307[/import]

#5

Sorry for the stupid questions but why isn’t this working?
local startPlayScene = function()
menu.isVisible = true
playScene.isVisible = false
end
local loading = function ()

–Initializing Graphic Groups

local menu = display.newGroup ()
menu.isVisible = true

local playScene = display.newGroup ()
playScene.isVisible = false

local gameOver = display.newGroup ()
gameOver.isVisible = false

local pauseGame = display.newGroup ()
pauseGame.isVisible = false

…

end
When I call the starPlayScene by clicking a button nothing happens. Here is the code for the button which is inside the loading function

local playButton = ui.newButton{
default = “Play button_s01.png”,
over = “Play button_s03.png”,
onRelease = startPlayScene,
}

[import]uid: 8192 topic_id: 1785 reply_id: 5308[/import]

#6

Local variables you define in a Function is local to that function. You need to define them outside your function for it to work. Here’s an example modified from your code.

-- forward references  
local menu, playScene  
  
local startPlayScene = function()   
 menu.isVisible = false  
 playScene.isVisible = true  
end  
  
local loading = function ()  
  
 --Initializing Graphic Groups  
  
 menu = display.newGroup ()  
 menu.isVisible = true  
  
 playScene = display.newGroup ()  
 playScene.isVisible = false  
  
  
 local r = display.newRect( 15, 70, 280, 70 ) -- x,y,w,h  
 r:setFillColor( 255, 255, 255 )  
  
 menu:insert(r)  
  
 local a = display.newCircle( 100, 100, 50) -- x,y, radius  
 a:setFillColor( 255, 255, 255 )  
  
 playScene:insert(a)  
  
end  
  
 loading()  
  
 -- Call Play function after 3 seconds  
 timer.performWithDelay( 3000, startPlayScene )

You should have seen an error in the terminal when you ran your program.

BTW, a display object can only be in one group at a time. Groups can be children of other groups.

-Tom [import]uid: 7559 topic_id: 1785 reply_id: 5319[/import]