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DistanceBetween() OOP


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The distanceBetween() function in Phaser doesn't seem to include support for Objects. Do I have to make a predefined group, or do something else? Thanks in Advance! 

Enemy = function (game, x, y) {    Phaser.Sprite.call(this, game, x, y, 'enemy');    game.physics.enable(this, Phaser.Physics.ARCADE);    var tween = game.add.tween(this).to({ x:400, y: 200}, 5000, Phaser.Easing.Linear.None).to({ x:400, y: 400}, 5000, Phaser.Easing.Linear.None).to({ x:0, y: 400}, 5000, Phaser.Easing.Linear.None).start();    };Enemy.prototype = Object.create(Phaser.Sprite.prototype);Enemy.prototype.constructor = Enemy;Enemy.prototype.update = function() {};Tower = function (game, x, y) {    Phaser.Sprite.call(this, game, x, y, 'tower');    game.physics.enable(this, Phaser.Physics.ARCADE);};Tower.prototype = Object.create(Phaser.Sprite.prototype);Tower.prototype.constructor = Tower;Tower.prototype.update = function() {    if(game.physics.arcade.distanceBetween(this, Enemy)<=100){        console.log("shoot");    }};var game = new Phaser.Game(800, 600, Phaser.AUTO, 'phaser-example', { preload: preload, create: create, update: update });function preload() {    game.load.image('enemy', 'assets/player.png');    game.load.image('tower', 'assets/player.png');}function create() {    game.physics.startSystem(Phaser.Physics.ARCADE);    var en = new Enemy(game, 800, 200);    game.add.existing(en);    var tow = new Tower(game, 500, 400);    game.add.existing(tow);}function update(){}
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distanceBetween will work happily with objects as long as they've got public x and y properties.


Your code looks wrong though - you're not comparing instances, you're comparing the actual base objects. "Enemy" is wrong, it should be a reference to an Enemy object, not the prototype itself.

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That's still not an instance of the object, it's the object prototype itself. Here:

Tower = function (game, x, y) {    Phaser.Sprite.call(this, game, x, y, 'tower');    game.physics.enable(this, Phaser.Physics.ARCADE);}; Tower.prototype = Object.create(Phaser.Sprite.prototype);Tower.prototype.constructor = Tower; Tower.prototype.checkDistance = function(enemy) {    if (this.game.physics.arcade.distanceBetween(this, enemy) <= 100) {        console.log("shoot");    }};var tower = new Tower(...);var bob = new Enemy(...);tower.checkDistance(bob);
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