让Ogre支持中文路径与中文文件名

最新推荐文章于 2019-08-21 11:12:38 发布

pizi0475

最新推荐文章于 2019-08-21 11:12:38 发布

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分类专栏： OGRE 文章标签： stream exception ios delete path file

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本文介绍了解决Ogre引擎中中文路径与文件名问题的方法。通过设置语言环境和修改源代码，可以有效处理中文路径，并避免数值格式化问题。

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Ogre中路径与文件名不支持中文,这是VS2005之后版本的std::fstream对中文路径处理不正确的原因,所以加载中文路径或文件名不成功,解决办法:

在主函数开始加入 setlocale(LC_ALL,"Chinese-simplified");

例如:

view plaincopy to clipboardprint?
virtual void createScene(void)
{
   setlocale(LC_ALL,"Chinese-simplified");
   Entity* ogreHead = mSceneMgr->createEntity("Head","左慈头.mesh");
SceneNode* headNode = mSceneMgr->getRootSceneNode()->createChildSceneNode();
   headNode->attachObject(ogreHead);

   mSceneMgr->setAmbientLight(ColourValue(0.5, 0.5, 0.5));
}
   virtual void createScene(void)
    {
      setlocale(LC_ALL,"Chinese-simplified");
      Entity* ogreHead = mSceneMgr->createEntity("Head","左慈头.mesh");
     SceneNode* headNode = mSceneMgr->getRootSceneNode()->createChildSceneNode();
      headNode->attachObject(ogreHead);

mSceneMgr->setAmbientLight(ColourValue(0.5, 0.5, 0.5));
}

本文来自优快云博客，转载请标明出处：http://blog.youkuaiyun.com/zyfu0000/archive/2009/12/07/4958731.aspx

Ogre的文件读取是使用的标准库的io库读取的，众所周知的是，在vs2005是存在着bug的。
因此想要一劳永逸的解决这个办法唯有去修改Ogre的源代码，以下为修改方法：

打开OgreFileSystem.cpp文件，找到FileSystemArchive::open方法，使用以下代码替换之：

DataStreamPtr FileSystemArchive::open( const String & filename) const

{

String full_path = concatenate_path(mName, filename);

// Use filesystem to determine size

// (quicker than streaming to the end and back)

struct stat tagStat;

int ret = stat(full_path.c_str(), &tagStat);

assert(ret == 0 && "Problem getting file size" );

// Always open in binary mode

static std::vector<wchar_t> s_wchar_buf((size_t)128);

size_t lengthUnicode = MultiByteToWideChar(CP_ACP, 0, full_path.c_str(), full_path.size(), NULL, 0);

if (s_wchar_buf.size() < lengthUnicode + 1)

{

s_wchar_buf.resize(lengthUnicode * 2);

}

wchar_t* szUnicode = &s_wchar_buf[0];

MultiByteToWideChar(CP_ACP, 0, full_path.c_str(), full_path.size(), szUnicode, lengthUnicode);

szUnicode[lengthUnicode] = 0;

std::ifstream* origStream = new std::ifstream();

origStream->open(szUnicode, std::ios::in | std::ios::binary);

// Should check ensure open succeeded, in case fail for some reason.

if (origStream->fail())

{

delete origStream;

OGRE_EXCEPT(Exception::ERR_FILE_NOT_FOUND,

"Cannot open file: " + filename,

"FileSystemArchive::open");

}

/// Construct return stream, tell it to delete on destroy

FileStreamDataStream* stream = new FileStreamDataStream(filename,

origStream, tagStat.st_size, true);

return DataStreamPtr(stream);

}

下面是一段ogre中的文件操作相关的源码

代码

    DataStreamPtr FileSystemArchive::open( const String & filename) const
    {
        String full_path = concatenate_path(mName, filename);

         // Use filesystem to determine size
         // (quicker than streaming to the end and back)
         struct stat tagStat;
     int ret = stat(full_path.c_str(), & tagStat);
        assert(ret == 0 && " Problem getting file size " );

         // Always open in binary mode
        std::ifstream * origStream = OGRE_NEW_T(std::ifstream, MEMCATEGORY_GENERAL)();
        origStream -> open(full_path.c_str(), std::ios:: in | std::ios::binary);

         // Should check ensure open succeeded, in case fail for some reason.
         if (origStream -> fail())
        {
            OGRE_DELETE_T(origStream, basic_ifstream, MEMCATEGORY_GENERAL);
            OGRE_EXCEPT(Exception::ERR_FILE_NOT_FOUND,
                 " Cannot open file: " + filename,
                 " FileSystemArchive::open " );
        }

         /// Construct return stream, tell it to delete on destroy
        FileStreamDataStream * stream = OGRE_NEW FileStreamDataStream(filename,
            origStream, tagStat.st_size, true );
         return DataStreamPtr(stream);
    }

主要的代码是

origStream -> open(full_path.c_str(), std::ios:: in | std::ios::binary);

通过在文件流打开文件之前，我们设置一下语言环境

std::locale:: global (std::locale( "" ));

接下来我们发现，中文路径的问题解决了，但是向文件中写入整型或浮点型数据时会有问题，比如“1000”，输出之后就成了“1，000”

这正是因为我们改变了语言环境的原因，为了将修改减少到最小，我们应该在文件打开完毕后，恢复之前的设置

std::locale saveLocal = std::locale:: global (std::locale( "" ));
origStream -> open(full_path.c_str(), std::ios:: in | std::ios::binary);
std::locale:: global (saveLocal);

everything is fine now~

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