cocos2d-x画线

在class HelloWorld : public cocos2d::CCLayer中添加

void draw();

实现：

void HelloWorld::draw()
{

    CCSize s = CCDirector::sharedDirector()->getWinSize();
    CCPointArray *array = CCPointArray::create();

    array->addControlPoint(ccp(, ));
    array->addControlPoint(ccp(, ));
    array->addControlPoint(ccp(s.width - , ));
    array->addControlPoint(ccp(s.width - , s.height - ));
    array->addControlPoint(ccp(, s.height - ));
    array->addControlPoint(ccp(, ));
    array->addControlPoint(ccp(s.width / , s.height / ));

    CCPointArray *array2 = CCPointArray::create();

    array2->addControlPoint(ccp(s.width / , ));
    array2->addControlPoint(ccp(s.width  -, ));
    array2->addControlPoint(ccp(s.width - , s.height - ));
    array2->addControlPoint(ccp(s.width / , s.height - ));
    array2->addControlPoint(ccp(s.width / , ));
                //个人理解是初始化用来存放点的栈
    kmGLPushMatrix();
                //定义栈的大小
    kmGLTranslatef(, , );
                //绘制曲线
    ccDrawCatmullRom(array, );
                //绘制完后弹出所存放的点
    kmGLPopMatrix();
                //由于上面只是弹出并不是释放，所以仍然可以通过点栈来绘制曲线
    ccDrawCatmullRom(array2,);
}

然后直接运行就可以了

补充：