CODE EXAMPLE FOR JAVASCRIPT

phaser rotate around

 preload ()
    {
        this.load.spritesheet('diamonds', 'assets/sprites/diamonds32x24x5.png', { frameWidth: 32, frameHeight: 24 });
    }

    create ()
    {
        this.group = this.add.group();

        for (var i = 0; i < 256; i++)
        {
            this.group.create(Phaser.Math.Between(200, 600), Phaser.Math.Between(100, 500), 'diamonds', Phaser.Math.Between(0, 4));
        }
    }

    update ()
    {
        Phaser.Actions.RotateAround(this.group.getChildren(), { x: 400, y: 300 }, 0.01);
    }