States with Parameters?

[negue]

Hey, 

 

i'm wondering if this feature maybe needed in Phaser.

 

We all can use States, which is very nice and easy to separate files / logic, but we can't "easy" pass parameters from the MainMenu to the "Game"-States.

 

With easy I mean something like this:

game.state.startWithParams('name', { myParam1: true });// inside the State on the constructorfunction myState(game, params){// {...}}

Ofcouse I could just attach my parameters to my gameObject. 

 

How do you handle your parameters to your "main game state". 

[ctmartinez1992]

I agree, to my knowledge there is no standard way to pass variables between state transitions, which i think it would be very handy, you can however use global/static variables

[Nick]

You can pass additional parameters via game.state.start();

e.g.

game.state.start('Leaderboard', true, false, customParam1, customParam2);

The first two params tell Phaser whether or not to clear the game world and cache.  Any params after those are custom and will be sent to your state's 'init' function if it exists.

 

Then within your state you need to create the init function:

 

  var LeaderboardState = function() {  };  LeaderboardState.prototype = {    init: function(customParam1, customParam2) {   }};

[BdR]

I read here that you can reference variables through the StateManager, something like this.game.state.states['statename'].variable, see code below

// Phaser.state for level select screen

mygame.LevelSelect = function(game){

    this.game = game; // keep reference to main game object

    this._selectedLevel = 0;

};

mygame.LevelSelect.prototype = {

    create: function(){

    //etc.

    onLevelSelected: function() {

        // pass variables to 'MainGame' state

        this.game.state.states['MainGame']._currentLevel = this._selectedLevel;

        this.game.state.states['MainGame']._showTutorial = (this._selectedLevel == 1); // only show tutorial on level 1

    },

    //etc.

};


// Phaser.state for main game loop

mygame.MainGame = function(game){

    this.game = game; // keep reference to main game object

    this._showTutorial = false;

    this._currentLevel = 0;

};

mygame.MainGame.prototype = {

    create: function(){

    //etc.