创建五角星的想法，通过设置锚点处理

                var starSpFrame = cc.spriteFrameCache.getSpriteFrame("EmitLight.png");
var starSp = cc.Sprite.create(starSpFrame);
layer.addChild(starSp);
starSp.setAnchorPoint(cc.p(0.5,0.5));
starSp.setPosition(cc.p(675,500));
var radius = 200///半径
var rot = 30;

var starSp1 = cc.Sprite.create(starSpFrame);
starSp1.setAnchorPoint(cc.p(-radius/starSp1.getContentSize().width, 0.5));
layer.addChild(starSp1);
starSp1.setPosition(cc.p(675,500));
starSp1.setRotation(rot);


var starSp2 = cc.Sprite.create(starSpFrame);
starSp2.setAnchorPoint(cc.p(-radius/starSp1.getContentSize().width, 0.5));
layer.addChild(starSp2);
starSp2.setPosition(cc.p(675,500));
starSp2.setRotation(72*1 + rot);


var starSp3 = cc.Sprite.create(starSpFrame);
starSp3.setAnchorPoint(cc.p(-radius/starSp1.getContentSize().width, 0.5));
layer.addChild(starSp3);
starSp3.setPosition(cc.p(675,500));
starSp3.setRotation(72*2 + rot);

var starSp4 = cc.Sprite.create(starSpFrame);
starSp4.setAnchorPoint(cc.p(-radius/starSp1.getContentSize().width, 0.5));
layer.addChild(starSp4);
starSp4.setPosition(cc.p(675,500));
starSp4.setRotation(72*3 + rot);


var starSp5 = cc.Sprite.create(starSpFrame);
starSp5.setAnchorPoint(cc.p(-radius/starSp1.getContentSize().width, 0.5));
layer.addChild(starSp5);
starSp5.setPosition(cc.p(675,500));
starSp5.setRotation(72*4 + rot);