设置layer显示范围，使超出范围控件不显示

Cocos2d-x
#1

看了CCScrollView的源码发现

重写CCnode 的 beforeDraw()和afterDraw()

CCPoint screenPos = this->convertToWorldSpace(this->getParent()->getPosition());

        glEnable(GL_SCISSOR_TEST);
        float s = this->getScale();

//        CCDirector *director = CCDirector::sharedDirector();
//        s *= director->getContentScaleFactor();
        CCEGLView::sharedOpenGLView()->setScissorInPoints(screenPos.x*s, screenPos.y*s, m_tViewSize.width*s, m_tViewSize.height*s);

afterDraw() 加入

glDisable(GL_SCISSOR_TEST);

就可以了

留作备忘。