How do I draw a line using Cocos2D-X?

Question

I have been playing around with Cocos2D-X on my computer, and I have got it to build the hello world program on all the devices I would like to be able to build it on.

I know how to make the program display a sprite, and display a label, but I have not been able just to get the program to draw a line. How can I draw a line in Cocos2D-X?

Answer 1

use void ccDrawLine(const CCPoint& origin, const CCPoint& destination) function declared in CCDrawingPrimitives.h

Edit

I've never tried using primitives myself. But as I know everything in cocos2d is rendered vis CCNode or it's subclass. So you must put your code inside draw method of some CCNode or it's subclass.

Answer 2

I have found another easy way to draw line in CCLayer. Cocos2d-x has a class named CCDrawNode. You can check reference here. And it is very easy to use the function:

void drawSegment(const CCPoint & from,
    const CCPoint & to,
    float   radius,
    const ccColor4F & color 
)

Little example:

CCDrawNode* node = CCDrawNode::create();
addChild(node,10);//Make sure your z-order is large enough
node->drawSegment(fromPoint,toPoint,5.0,ccc4f(180,180,180,100));