cocos2dx cliping polygon

ClippingNode* createClippingNode() {
    auto cl = ClippingNode::create();
    cl->setContentSize(Size(100, 100));
    cl->setAnchorPoint(Vec2(0.5, 0.5));
    auto stencil = DrawNode::create();
    //stencil->drawPoint(Vec2(0,0), 200, Color4F::WHITE);
    vector<Vec2> pnts;
    pnts.push_back(Vec2(0,0));
    pnts.push_back(Vec2(50,100));
    pnts.push_back(Vec2(100, 0));
    stencil->drawPolygon(pnts.data(), pnts.size(), Color4F::WHITE, 0, Color4F::WHITE);
    
    cl->setStencil(stencil);
    auto sp = Sprite::create("radgr.png");
    sp->setColor(Color3B::GREEN);
    cl->addChild(sp);
    stencil->setCameraMask((unsigned short)CameraFlag::USER2);
    return cl;
}