Accessing the scene from an external class

Solar2D Composer
#1

Hi all,

In the game I’m currently writing the player and the enemies are all external classes.  I need the player class to dispatch an event that the enemies are listening for and respond to.  What I can’t figure out is how to reference the scene from the external player class.  I’m sure it’s easy but just can’t seem to figure it out.

Thanks in advance.

Chris

#2

Hi there,

Your external objects could query composer to find out what the current scene is and then pass messages from there.  Basically:

--Returns the currently active scene local currScene = composer.getSceneName( "current" )

(See this page for more info).

Another option would be to pass a reference to the current scene when you instantiate your player/enemy objects:

So, in the code for your player object:

local public={} --Local variable holding reference to the main scene local sceneObject = nil local function setScene(obj)   sceneObject = obj end public.setScene = setScene return public

Then when you instantiate the player object in your scene:

--Pass the current scene playerObject = require("playerObject") playerObject.setScene(thisScene)

playerObject will then have a reference to the current scene.  (The syntax on this may not be perfect, I’ve just typed it in, but you get the idea).

Hope this helps,

Simon

#3

@happymongoose

Cheers for that Simon.  Sorry it’s taken so long for me to reply.  I’ll give that a bash tonight when I get home.

#4

Hi there,

Your external objects could query composer to find out what the current scene is and then pass messages from there.  Basically:

--Returns the currently active scene local currScene = composer.getSceneName( "current" )

(See this page for more info).

Another option would be to pass a reference to the current scene when you instantiate your player/enemy objects:

So, in the code for your player object:

local public={} --Local variable holding reference to the main scene local sceneObject = nil local function setScene(obj)   sceneObject = obj end public.setScene = setScene return public

Then when you instantiate the player object in your scene:

--Pass the current scene playerObject = require("playerObject") playerObject.setScene(thisScene)

playerObject will then have a reference to the current scene.  (The syntax on this may not be perfect, I’ve just typed it in, but you get the idea).

Hope this helps,

Simon

#5

@happymongoose

Cheers for that Simon.  Sorry it’s taken so long for me to reply.  I’ll give that a bash tonight when I get home.