Cocos2d-x开发---改变父节点颜色、透明度影响子节点

void CCNodeRGBA::setColor(const ccColor3B& color)
{
     _displayedColor = _realColor = color;
     if ( _cascadeColorEnabled )
     {
          ccColor3B parentColor = ccWHITE;
          CCRGBAProtocol* parent = dynamic_cast<CCRGBAProtocol*>(m_pParent);
          if( parent && parent->isCascadeColorEnabled() )
          {
               parentColor = parent->getDisplayedColor();
          }
          updateDisplayedColor(parentColor);
     }
}