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Hi guys. I've recently started to learn Phaser and i think it's pretty awesome but i have a little problem. I'm using P2 Physics. I have an image-based rectangle(1 img for vertical parts, 1 for horizontonal) and 2 circles in my game. One of the circles is player and other one is the ball. I wrote the player and ball collision parts successfully, but when i press SHIFT key(pressing shift means you hit the ball in my game and ball accelerates with speed 400) sometimes ball just ignores the walls and passes them. I spent all my day and night without sleep but i couldn't make it. Some help would be nice, take care of yourselves By the way, there is no player and wall collision so i seperated and used them as collisionGroups.

i dont know about the internals of phaser but i could imagine that using collision groups instead of letting everything collide with everything and filter the relevant infos in the begincontact event would be faster because phaser/p2 doesnt need to check everything against everything.. right or totally wrong because collisiongroups create an aditional overthead?

Cross posted from here. I've got a prefab class that inherits from Group. var PipeGroup = function(game, x, y, collisionGroup, collidesWith) {Phaser.Group.call(this, game);var topPipe = this.create(0,0,'pipes');topPipe.physicsEnabled = true;topPipe.body.kinematic = true;topPipe.body.setRectangle();topPipe.body.setCollisionGroup(collisionGroup);topPipe.body.collides(collidesWith);this.x = x;this.y = y,}; PipeGroup.prototype = Object.create(Phaser.Group.prototype);PipeGroup.prototype.constructor = PipeGroup;And in my main game's create function: create = function() { .. this.playerCG = game.physics.createCollisionGroup(); this.pipeCG = game.physics.createCollisionGroup(); // add our player to the stage this.player = this.add.sprite(game.world.width/3,220,'bird'); // enable physics on our player this.player.physicsEnabled = true; // add our player to the player collision group this.player.body.setCollisionGroup(this.playerCG); this.player.body.collides([this.pipeCG], this.death, this); .. game.time.events.loop(Phaser.Timer.SECOND,this.generatePipes, this);}and generatePipes looks like: generatePipes: function() { var pipeY = game.rnd.integerInRange(-120,120); var pipes = new PipeGroup(game,game.world.width + 32, pipeY, this.pipeCG, this.playerCG); this.player.body.collides([this.pipeCG], this.death, this);}However, the player is never colliding with the pipes. Can you modify a collision group after the create phase of a state? I'm a bit at a loss to figure out why this doesn't work.