Collisions are slightly off

[finspin]

Hi,

 

my first game and first post on this forum. I'm looking for help with collisions, having difficult time to understand why they don't work as expected.

 

There are 3 bouncing balls but sometimes they collide "too early", meaning they bounce off each other before they actually touch. In some cases they collide as expected.

 

Could you show me what I'm doing wrong here?

var game = new Phaser.Game(480, 640, Phaser.AUTO, '', {    preload: preload,    create: create,    update: update});var bubble1, bubble2, bubble3, bubbles;function preload() {    game.load.image('bubble1', 'assets/bubble1.png');    game.load.image('bubble2', 'assets/bubble2.png');    game.load.image('bubble3', 'assets/bubble3.png');}function create() {    game.stage.backgroundColor = '#ccc';    game.physics.startSystem(Phaser.Physics.ARCADE);    bubble1 = game.add.sprite(50, game.world.height - 50, 'bubble1');    bubble2 = game.add.sprite(200, game.world.height - 50, 'bubble2');    bubble3 = game.add.sprite(350, game.world.height - 50, 'bubble3');    bubbles = game.add.group();    bubbles.add(bubble1);    bubbles.add(bubble2);    bubbles.add(bubble3);    bubbles.enableBody = true;    bubbles.setAll('anchor.x', 0.5);    bubbles.setAll('anchor.y', 0.5);    bubbles.forEach(function (bubble) {        game.physics.arcade.enable(bubble);        bubble.body.collideWorldBounds = true;        bubble.body.bounce.set(1);    });    bubble1.body.velocity.setTo(200, 200);    bubble2.body.velocity.setTo(250, 250);    bubble3.body.velocity.setTo(100, 200);}function update() {    game.physics.arcade.collide(bubbles, bubbles);}

[rich]

Are your bubbles round? Are you sure what you're seeing isn't just the results of arcade physics using AABBs for all collision, not circles?

[finspin]

Yes, I think my problem is that the bubbles are in fact not rounded but they are seen as squares. I have uploaded my example here http://finspin.github.io/bubble-game/.

 

Could you please point me to the right direction how to achieve collision of rounded objects?

[AzraelTycka]

Try P2 physics instead of arcade.