phaser/examples/physics/shoot the pointer.js

var game = new Phaser.Game(800, 600, Phaser.CANVAS, 'phaser-example', { preload: preload, create: create, update: update, render: render });

function preload() {

    game.load.image('arrow', 'assets/sprites/arrow.png');
    game.load.image('bullet', 'assets/sprites/purple_ball.png');
    
}

var sprite;
var bullets;

var fireRate = 100;
var nextFire = 0;

function create() {

    game.stage.backgroundColor = '#313131';

    bullets = game.add.group();
    bullets.createMultiple(50, 'bullet');
    bullets.setAll('anchor.x', 0.5);
    bullets.setAll('anchor.y', 0.5);
    bullets.setAll('outOfBoundsKill', true);

    sprite = game.add.sprite(400, 300, 'arrow');
    sprite.anchor.setTo(0.5, 0.5);

}

function update() {

    sprite.rotation = game.physics.angleToPointer(sprite);

    if (game.input.activePointer.isDown)
    {
        fire();
    }

}

function fire() {

    if (game.time.now > nextFire && bullets.countDead() > 0)
    {
        nextFire = game.time.now + fireRate;

        var bullet = bullets.getFirstDead();

        bullet.reset(sprite.x, sprite.y);

        bullet.rotation = game.physics.moveToPointer(bullet, 300);
    }

}

function render() {

    game.debug.text('Active Bullets: ' + bullets.countLiving() + ' / ' + bullets.total, 32, 32);
    game.debug.spriteInfo(sprite, 32, 450);

}