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(20);

    array->addControlPoint(ccp(0, 0));
    array->addControlPoint(ccp(80, 80));
    array->addControlPoint(ccp(s.width - 80, 80));
    array->addControlPoint(ccp(s.width - 80, s.height - 80));
    array->addControlPoint(ccp(80, s.height - 80));
    array->addControlPoint(ccp(80, 80));
    array->addControlPoint(ccp(s.width / 2, s.height / 2));


    CCPointArray *array2 = CCPointArray::create(20);

    array2->addControlPoint(ccp(s.width / 2, 30));
    array2->addControlPoint(ccp(s.width  -80, 30));
    array2->addControlPoint(ccp(s.width - 80, s.height - 80));
    array2->addControlPoint(ccp(s.width / 2, s.height - 80));
    array2->addControlPoint(ccp(s.width / 2, 30));
                //个人理解是初始化用来存放点的栈
    kmGLPushMatrix();
                //定义栈的大小
    kmGLTranslatef(50, 50, 0);
                //绘制曲线
    ccDrawCatmullRom(array, 50);
                //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(array2,50);
}

 

然后直接运行就可以了

补充：