Cocos2d-x tutorial (21)-canvas

 

This blog will use Cocos2d-x 2.2.1 version + Xcode5.0 to make a simple drawing board tool, the principle is based on OpenGL painting points and draw line function, by touch the screen, save all the touch points in the container, and draw points through OpenGL. Let's take a look:

Let's take a look at the code below:

I name the project file DrawingBoard and create a new class named DrawingLayer in Classes. The Code is as follows:

. H file

 

. Cpp file:

After completing the preceding operations, introduce the DrawingLayer header file in the HelloWolrd. cpp file and add the code in the init () method:

DrawingLayer * layer = DrawingLayer: create ();

This-> addChild (layer );

You can see the effect.