宽字节转换.
inline wchar_t* AnsiToUnicode( const char* szStr ) 
{  
 int nLen = MultiByteToWideChar( CP_ACP, MB_PRECOMPOSED, szStr, -1, NULL, 0 ); 
 if (nLen == 0)   {    return NULL;   }  
 wchar_t* pResult = new wchar_t[nLen]; 
 MultiByteToWideChar( CP_ACP, MB_PRECOMPOSED, szStr, -1, pResult, nLen ); 
 return pResult;
 }
//osg汉字处理.
osg::ref_ptr<osg::Node> CWayPoint::createText()
{
    m_objectBillboard = new osg::Billboard;
    m_mtxBillboard->addChild(m_objectBillboard);
    osg::ref_ptr<osgText::Font> font = osgText::readFontFile( "fonts/simhei.ttf" );//读取中文字体
    osg::Vec4 color(0.0f,0.0f,1.0f,1.0f);

    osg::ref_ptr<osgText::Text> text = new osgText::Text();
    text->setFont(font);
    text->setColor(color);
    text->setCharacterSize(0.18f);
    text->setAxisAlignment(osgText::TextBase::XZ_PLANE);
    text->setText(AnsiToUnicode(m_objectName));//字体转换;
    text->setDrawMode(osgText::Text::BOUNDINGBOX  | osgText::Text::TEXT);
    m_objectBillboard->addDrawable(text.get());
    m_objectBillboard->setMode(osg::Billboard::POINT_ROT_EYE);   
    m_objectBillboard->setPosition(0,osg::Vec3d(0.0f,0.0f,0.5f));

    m_mtxBillboard->addChild(createLine());
    m_mtxBillboard->getOrCreateStateSet()->addUniform(new osg::Uniform("TextureNum", -1));
    return m_mtxBillboard;
}