Gravity

[crffty]

Hi. I'm trying to make my first game with Phaser and I'm trying to get some physics working - global gravity.

I'm not sure whats going on but somethings not working:

 

vaultage.game.prototype = {
  create : function() {
    this.background = this.game.add.tileSprite(0, 0, this.game.width, 360, 'background');
    this.background.autoScroll(-100, 0);

    this.background = this.game.add.tileSprite(0, 290, this.game.width, 8, 'ground');
    this.background.autoScroll(-180, 0);

    this.player = this.add.sprite(30, 230, 'player');
    this.player.animations.add('run');
    this.player.animations.play('run', 10, true);

    // physics engine
    this.game.physics.startSystem(Phaser.Physics.P2JS);
    // gravity
    this.game.physics.p2.gravity.y = 400;

  },

based on a couple tutorials I've been following I was expecting for the 'ground' to fall, but it does not. I'm still really new to Phaser and kinda new to JS, so i figure I'm overlooking something simple.

I actually only need gravity on the player sprite so if you could suggest how to go about that I would appreciate in but would be happy just to get some gravity of any kind to start with.

Thank you in advance for your help.   

[rgk]

First, start this.game this.game.physics.startSystem(Phaser.Physics.P2JS); before you make the sprites or alternatively add physics to each sprite like this: this.game.physics.p2.enable(this.player);