How to draw circle in cocos2dx

Question

How to draw circle or line in cocos2dx 3.0.

my code is

DrawNode *drawnode = DrawNode::create();
drawnode->drawDot(ccp(15,Director::sharedDirector()->getVisibleSize().height/2),50,Color4F(255,255,255,255));

this->addChild(drawnode);

Answer 1

to draw a line cocos2d-x has function drawsegment

a circle is special type of polygon so for circle drawpolygon function is used

// for line

 draw->drawSegment(startPoint, moved, 5,Color4F(1,222,120,1) );

// for circle

static CCPoint Circle [nCount]; // vertex array
for ( int i = 0 ; i <nCount; i ++) {
    float rads = i * coef; // radians
    Circle [i] .x = Radius * cosf (rads); //vertex x
    Circle [i] .y = Radius * sinf (rads); //vertex y
}
draw-> drawPolygon (Circle, nCount, blue, 0 , red);