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Hi all I'm trying to build a tank game for an Artificial Intelligence simulation (so the game will be played by AI instead of a human). I got the tank game example and modified it a little bit but I'm stuck with a problem I can't sort out. When my tank is moving and I start to rotate, the tank continues to move in the same direction it was moving, with little or no drift at all. It's hard to explain so I'm posting the source code here just in case anyone can take a look and shed some light. Thanks in advance, var game = new Phaser.Game(800, 600, Phaser.AUTO, 'game-canvas', { preload: preload, create: create, update: update });function preload () { game.load.atlas('tank', 'assets/tanks.png', 'assets/tanks.json'); game.load.image('earth', 'assets/scorched_earth.png');}var land;var shadow;var tank;var turret;var currentSpeed = 0;var cursors;function create () { // Resize our game world to be a 2000 x 2000 square game.world.setBounds(-1000, -1000, 2000, 2000); // Our tiled scrolling background land = game.add.tileSprite(0, 0, 800, 600, 'earth'); land.fixedToCamera = true; // The base of our tank tank = game.add.sprite(0, 0, 'tank', 'tank1'); tank.anchor.setTo(0.5, 0.5); tank.animations.add('move', ['tank1', 'tank2', 'tank3', 'tank4', 'tank5', 'tank6'], 20, true); // Finally the turret that we place on-top of the tank body turret = game.add.sprite(0, 0, 'tank', 'turret'); turret.anchor.setTo(0.3, 0.5); // This will force it to decelerate and limit its speed game.physics.enable([tank, turret], Phaser.Physics.ARCADE); tank.body.drag.set(100); tank.body.maxVelocity.set(250); tank.body.collideWorldBounds = true; tank.body.maxAngular = 50; tank.body.angularDrag = 50; turret.body.maxAngular = 200; turret.body.angularDrag = 80; // A shadow below our tank shadow = game.add.sprite(0, 0, 'tank', 'shadow'); shadow.anchor.set(0.5, 0.5); tank.bringToTop(); turret.bringToTop(); game.camera.follow(tank); //game.camera.deadzone = new Phaser.Rectangle(150, 150, 500, 300); game.camera.focusOnXY(0, 0); cursors = game.input.keyboard.createCursorKeys();}function update () { if (cursors.left.isDown) { tank.body.angularAcceleration -= 20; } else if (cursors.right.isDown) { tank.body.angularAcceleration += 20; } else { tank.body.angularAcceleration = 0; } if (cursors.up.isDown) { tank.throttle += 10; if (tank.throttle > 60) { tank.throttle = 60; } tank.body.acceleration.x = Math.cos(tank.rotation) * tank.throttle; tank.body.acceleration.y = Math.sin(tank.rotation) * tank.throttle; } else { tank.body.acceleration.set(0, 0); tank.throttle = 0; } if (game.input.keyboard.isDown(Phaser.Keyboard.A)) { turret.body.angularAcceleration = -150; } else if (game.input.keyboard.isDown(Phaser.Keyboard.S)) { turret.body.angularAcceleration = 150; } else { turret.body.angularAcceleration = 0; } land.tilePosition.x = -game.camera.x; land.tilePosition.y = -game.camera.y; // Position all the parts and align rotations shadow.x = tank.x; shadow.y = tank.y; shadow.rotation = tank.rotation; turret.x = tank.x; turret.y = tank.y;}