图1围绕图2做圆周运动

想要像rotate point这里例子一样，一个点围着另一个点做圆周运动，可如果我是两张图片，该怎么设置呢设置的是点的颜色以及大小，那我怎么把它设置成图片呢

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

var s1; var s2;

function preload() { game.load.image(‘mushroom’, ‘assets/sprites/mushroom2.png’); game.load.spritesheet(‘mummy’, ‘assets/sprites/metalslug_mummy37x45.png’, 37, 45, 18); }

function create() { s1 = game.add.sprite(300, 300, ‘mushroom’); s2 = game.add.sprite(400, 300, ‘mummy’); }

function update() { s1.position.rotate(s2.x, s2.y, 1, true); }