绘制——如何在cocos中画画

原来的方法：先定义命令对象 CustomCommand _customCommand;

 再重载void draw(Renderer* renderer, const Mat4 &transform, uint32_t flags)

{       /* 初始化一个命令参数 */

        _customCommand.init(_globalZOrder,transform, flags);

        _customCommand.func =CC_CALLBACK_0(T020305Draw::onDraw, this, transform,flags);