Drawing Rectangle in Cocos2dx - c++

Question

I am having trouble drawing a basic white rectangle using the Cocos2dx library in the iOS environment. I have looked at a couple of other implementations for guidance.
http://discuss.cocos2d-x.org/t/draw-rectangle-with-drawrect-in-cocos2dx-not-working/14836/3
Cocos2d-x: How can I draw a resizing rectangle?
It basically looks like I need to use the class method of DrawNode::create() to make the node, then establish the vertices like in openGL, then draw it with the DrawNode->drawPolygon method and add the child node to the scene with the addChild method of the cocos2d::Layer subclass.
Here is my code.
bool JFScene::init()
{
if ( !Layer::init() )
{
return false;
}
auto visibleSize = Director::getInstance()->getVisibleSize();
Vec2 origin = Director::getInstance()->getVisibleOrigin();
auto closeItem = MenuItemImage::create(
"CloseNormal.png",
"CloseSelected.png",
CC_CALLBACK_1(JFScene::menuCloseCallback, this));
closeItem->setScale(2.0);
closeItem->setPosition(Vec2(origin.x + visibleSize.width - closeItem->getContentSize().width/2 ,
origin.y + closeItem->getContentSize().height/2));
auto menu = Menu::create(closeItem, NULL);
menu->setPosition(Vec2::ZERO);
this->addChild(menu, 1);
auto CButton = Sprite::create("CButton.png");
CButton->setPosition(
Point(visibleSize.width / 2 + origin.x, visibleSize.height / 2 + origin.y)
);
this->addChild(CButton, 1);
auto rectNode = DrawNode::create();
Vec2 vertices[4] = {
Vec2(-50, -50),
Vec2(50, -50),
Vec2(50, 50),
Vec2(-50, 50)
};
rectNode->drawPolygon(vertices, 4, Color4F::WHITE, 1, Color4F::WHITE);
this->addChild(rectNode);
return true;
}
The odd thing is that the CButton Node appears to render when I run it on my iPhone 5s as well as the close item that was included in the default file, but the white rectangle I am trying to draw does not render. Any ideas why?

Answer 1

You want to draw a rectangle... Look at this code snippet:
auto rectNode = DrawNode::create();
Vec2 rectangle[4];
rectangle[0] = Vec2(-50, -50);
rectangle[1] = Vec2(50, -50);
rectangle[2] = Vec2(50, 50);
rectangle[3] = Vec2(-50, 50);
Color4F white(1, 1, 1, 1);
rectNode->drawPolygon(rectangle, 4, white, 1, white);
this->addChild(rectNode);
I hope it works for you.
Reference: cocso2d-x forum
Besides, I recommend you take a look at this similar question if you didn't.