我在编译osgcegui那个例子时,出现这个错误
CEGUIDrawable::loadScheme ErrorefaultResourceProvider::load - XXX.scheme does not exist
CEGUIDrawable::loadFont Error:DefaultResourceProvider::load - XXX.Font does not exist
CEGUIDrawable::loadLayout Error:DefaultResourceProvider::load - XXX.layout does not exist
请高手指导一下,我该怎么做