Creating a spash screen that works with scene manager?

Tom2012 · October 2012

Hey gang, I'm looking for a way to have a 'loading' splash screen - simliar to the Gideros one that appears on non-subscriber apps.

As the player enters a level, I'd like to show 'loading' while the texture file loads.

I've read through this thread from May: http://www.giderosmobile.com/forum/discussion/995/how-can-i-create-preloader

But can't figure out how to use it with Scenemanager, where my assets vary from scene to scene.

Is this the way to do it?

main.lua

--define scenes
sceneManager = SceneManager.new({
["Menu"] = menu,
["Credits"] = credits,
["Help"] = help,
["Level 1"] = level1
})
 
application:setBackgroundColor(0x000000)
 
--add manager to stage
stage:addChild(sceneManager);
 
sceneManager:changeScene("Level 1", 1);

Level 1.lua

level1 = Core.class(Sprite)
function level1:init()
 
local loading = Bitmap.new(Texture.new("gfx/loading.png"))
self:addChild(loading)
 
local function preloader()
 
-- load all your assets here
 
local Atlas2 = TexturePack.new("Atlases/Atlas 2.txt", "Atlases/Atlas 2.png");
 
self:removeChild(loading)
loading = nil;
self:removeEventListener(Event.ENTER_FRAME, preloader)
 
-- rest of code here
 
end
end

Ninjadoodle · October 2015

I know this is an old thread, but this is exactly what I'm looking for as well

jdbc · October 2015

Use this code in your main.lua replacing with your own splash image

 
application:setKeepAwake(true)
 
local function draw_loading()
	loading = Sprite.new()
 
	local logo = Bitmap.new(Texture.new("gfx/jdbc_games.png", true))
	logo:setY(150)
	loading:addChild(logo)	
 
	stage:addChild(loading)
end
 
local function preloader()
 
	stage:removeEventListener(Event.ENTER_FRAME, preloader)
 
	-- Load all your assets here
 
	-- Game starting
	scenes = {"game"}
 
	sceneManager = SceneManager.new({
		["game"] = GameScene,
		})
 
	stage:addChild(sceneManager)
 
	local currentScene = scenes[1]
 
	local timer = Timer.new(1000, 1)
	timer:addEventListener(Event.TIMER, 
				function()
					-- Remove loading scene
					stage:removeChild(loading)
					loading = nil
					sceneManager:changeScene(currentScene)
				end)
	timer:start()
end
 
draw_loading()
stage:addEventListener(Event.ENTER_FRAME, preloader)

Ninjadoodle · October 2015

Hi @jdbc

Thanks for the reply!

I think your example only works when you're loading all the assets at the start.

I'm trying to load assets in different scenes and show a loading screen without interruptions to fade in/out.

Is there any way to do this?

Thank again guys!

jdbc · October 2015

Hi @jdbc

Thanks for the reply!

I think your example only works when you're loading all the assets at the start.

I'm trying to load assets in different scenes and show a loading screen without interruptions to fade in/out.

Is there any way to do this?

Thank again guys!

Just create a loading scene and then change to your game scene:

LoadingScene = Core.class(Sprite)
 
function LoadingScene:init()
 
  -- Load your assets here
 
  self:addEventListener("enterEnd", self.enterEnd, self)
end
 
-- When scene is loaded
function LoadingScene:enterEnd()
  sceneManager:changeScene(scenes[1], 1, SceneManager.flipWithFade, easing.linear)
end

SinisterSoft · October 2015

Ideally Giderso will eventually get an optional splash screen that will be user defined. This would load immediatly whilst the rest of the program is initialised (lua, etc). It could turn off at the first draw instance.

Ninjadoodle · October 2015

Thanks guys for the replies!

I think that a user defined 'level to level' pre-loader (with progress bar) would be brilliant.

Is this sort of feature on the roadmap?

SinisterSoft · October 2015

I don't know about that. I was thinking something that would be displayed as quickly as possible and would stay for a couple of seconds or until the first draw by the main lua code.

GiderosFan · October 2015

Yes an Splash Screen option would be very nice or an Sample Project in the Gideros Project Folder (Splash Screen with Progressbar). I think an Splash is the Fundamental of every Game.

Ninjadoodle · October 2015

Sorry guys, I get what you're talking about

My feature request belongs in another thread haha

saeys · August 2016

Continuing on a old thread here... :-)

When my 'game' is starting on a 2013 device, there's a black screen for a number of seconds before entering the main scene (not main.lua). What's happening during that black screen? I think it is loading all assets at that point (there's a great many textures and sound files) (but I'm not sure).

I'm thinking especially of this point in the code snippets above:

           -- Load all your assets here

Maybe I'm missing out something very fundamental here, but how can I decide when to load all those assets at that point?

I've tried the enter frame event solution in both main.lua and init.lua, but it seems to do nothing, when the system runs through that code the assets seem to have been already loaded. Or am I getting it wrong?

antix · August 2016

@sayes there is a feature in the latest build that allows you to do tasks like load things in the background. I haven;t tried this myself yet but it sounds like the kind of thing you might look at implementing to alleviate your blocked app issue.

Have a read of http://docs.giderosmobile.com/reference/gideros/Core/asyncCall and checkout the AsyncTextureLoading example in the latest build.

SinisterSoft · August 2016

@saeys With the new fake threads (asyncCall) you can start a loader, things start when your main lua code runs out of lines. So make that as short as possible and put everything into your loader and game loop functions. This starts straight away now, there used to be black for a second or two...

saeys · August 2016

Thanks @antix & @SinisterSoft Now, I'm trying to understand how to use asyncCall to make a splash screen while all assets are loading. I have played around with the assyncCall example a little. I have a couple of questions, but I start with one... :P

With the new fake threads (asyncCall) you can start a loader, things start when your main lua code runs out of lines.

Ok, my last line (in my own project) is a SceneManager changeScene() method, so it starts to execute things before main.lua is out of lines. How do I prevent that?

SinisterSoft · August 2016

Put the change scene at the end of the fake thread.

saeys · August 2016

Stupid problem, simple answer... $:\$ "> I'm still on my learning curve. Thanks for helping unknotting things!

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