Unigine::FileSystem Class

Provide control over asynchronous loading of files/meshes/images/nodes on demand under the data directory, including files in ZIP and UNG packages. Such packages are automatically handled by the Engine and all their files are automatically added to the file system.
Allow adding directories (even with ZIP and UNG packages) that are outside the data directory and provide control over loading such files.
Allow adding ZIP and UNG packages that are outside the data directory. After that, files in such packages are accessed in a usual way, by specifying a path to the file only inside the package.
Allow caching files in the memory and adding files to blobs if they are accessed or modified multiple times at run time.

Also methods of the FileSystem class can be used when implementing your own importer from an external format to UNIGINE-native ones. For example, you can store only the original file on the disk, files in UNIGINE-native formats can be stored in the virtual file system only.

Notice
				This class is in the Unigine namespace.
This class is a singleton.

			

Getting the Asset Filename#

Using the GUID of an asset or the path to the source file on a disk, you can get access to the filename the following way:

Source code (C++)

String input = "guid://857e03518c10647cb16975abc15f0f0e66a04b15"; // asset should be referenced with a GUID

// for a texture there may be two possible filenames to be returned
//String input = ".runtimes/de/857e03518c10647cb16975abc15f0f0e66a04b15.texture"; // the texture may have a runtime version
//String input = "test/test.png"; // or the source version may be used as a runtime

// getting the virtual path
const UGUID &guid = FileSystem::getGUID(input); // GUID for the given file
const UGUID &asset_guid = FileSystemAssets::resolveAsset(guid); // corresponding asset GUID
const String &asset_virtual_filepath = FileSystem::getVirtualPath(asset_guid); // virtual path for the given file GUID

// getting and outputting the filename
Log::message("Filepath: %s\n", asset_virtual_filepath.get()); // virtual path 
Log::message("Filename: %s\n", asset_virtual_filepath.filename().get()); // filename without the extension
Log::message("Basename: %s\n", asset_virtual_filepath.basename().get()); // filename with the extension

功能列表:

Name	描述 View: Sort by:
getNumModifiers	Returns the current The total number of file modifiers registered in the file system.
getEventFileChanged	The Event triggered when the file is changed using the FileSystem API.
getEventFileRemoved	The Event triggered when the file is removed using the FileSystem API.
getEventFileAdded	The Event triggered when the file is added using the FileSystem API.
getEventFilesChanged	The Event triggered at the end of the Engine's Update() containing the files changed during the frame.
getEventFilesRemoved	The Event triggered at the end of the Engine's Update() containing the files removed during the frame.
getEventFilesAdded	The Event triggered at the end of the Engine's Update() containing the files added during the frame.
getMount	Returns a mount point for the specified path.
getMounts	Returns a list of all mount points currently used by the file system and puts the to the specified output buffer.
getRootMount	Returns the root mount of the file system.
createMount	Adds a new mount point for the specified external folder/package, virtual path and access mode.
addMount	Adds a new mount point using the data from the specified *.umount file.
saveMountFile	Saves the specified *.umount file.
removeMount	Unmounts a mount point with a given path.
clearMounts	Unmounts all mount points.
loadPackage	Loads an UNG or ZIP package into the file system. Note that the package should be mounted, otherwise it won't be loaded.
removePackage	Unloads an UNG or ZIP package from the file system.
getSupportedPackagesExtensions	Returns a list of registered extensions that can be loaded as a package.
getPackageVirtualFiles	Saves the list of names for all virtual files stored in the specified package to the specified string buffer.
preloadExternPackage	Loads the custom package before the file system initialization.
clearPreloadedExternPackages	Clears all preloaded custom packages (packages loaded before the file system initialization).
addExternPackage	Adds a custom package to the virtual file system.
getVirtualFiles	Saves the list of names for all known files registered in the file system to the specified string buffer.
isVirtualFile	Checks if the given file is known to the virtual file system.
addVirtualFile	Registers the regular file name as known virtual file with the given GUID and appends it to the map used for fast searching.
renameVirtualFile	Renames the specified known virtual file.
removeVirtualFile	Removes the virtual file with the given name.
changeVirtualFile	Marks the virtual file with the given name as modified.
removeNonExistingVirtualFiles	Removes all non-existing virtual files from the File System.
isBlobFile	Checks if the given file is loaded to a blob.
addBlobFile	Adds a file into a blob.
removeBlobFile	Removes a file from the blob.
isCacheFile	Checks if the given file is loaded into cache.
addCacheFile	Caches a file in the memory.
removeCacheFile	Removes a cached file from the memory.
isDiskFile	Returns a value indicating if the specified file path is a path to a file on disk (i.e. not a package, a blob, or a cache file).
isPackageFile	Returns a value indicating if the specified file path is a path to a file inside a ZIP or UNG package.
resolvePartialVirtualPath	Converts the given partial path to a full virtual one.
getVirtualPath	Resolves a virtual path for the given file path.
getAbsolutePath	Resolves an absolute path for the given file path.
getPackageVirtualPath	Resolves a virtual path for the given path to the package.
getPackageAbsolutePath	Resolves an absolute path for the given path to the package.
getExtension	Returns the extension for the given file.
isFileExist	Checks if the given file actually exists on the disk.
isGUIDPath	Returns a value indicating if the given path has a valid GUID path format (e.g. "guid://e231e15beff2309b8f87c30b2c105cc4d2399973)".
isAssetPath	Returns a value indicating if the given path has a valid asset path format (e.g. asset://1.tga).
getMTime	Returns the time of the last modification of the given file.
loadGUIDs	Loads file system GUIDs from the specified file.
saveGUIDs	Saves all file system GUIDs to the specified file in the specified format (json or binary).
generateGUID	Generates a new GUID.
setGUID	Sets the specified GUID for the given file.
getGUID	Returns the GUID (if it exists) for the given file.
getFileSize	Returns the size of the specified file.
getModifier	Returns the name of the given modifier.
addModifier	Registers a new modifier in the file system.
removeModifier	Unregisters a given modifier in the file system.
clearModifiers	Unregister all modifiers in the file system.
guidToPath	Returns the path to the file with the specified GUID.
pathToGuid	Returns the GUID of the file to which the path is specified.

FileSystem Class

Members

int getNumModifiers() const#

Returns the current The total number of file modifiers registered in the file system.

Return value

Current The total number of file modifiers registered in the file system.

static Event<const UGUID &, const char *> getEventFileChanged() const#

Event triggered when the file is changed using the FileSystem API. You can subscribe to events via connect() and unsubscribe via disconnect(). You can also use EventConnection and EventConnections classes for convenience (see examples below).

Notice

For more details see the Event Handling article.

The event handler signature is as follows: myhandler(const UGUID & guid, const char * path)

Usage Example

Source code (C++)

// implement the FileChanged event handler
void filechanged_event_handler(const UGUID & guid,  const char * path)
{
	Log::message("\Handling FileChanged event\n");
}


//////////////////////////////////////////////////////////////////////////////
//  1. Multiple subscriptions can be linked to an instance of the EventConnections 
//  class that you can use later to remove all these subscriptions at once
//////////////////////////////////////////////////////////////////////////////

// create an instance of the EventConnections class
EventConnections filechanged_event_connections;

// link to this instance when subscribing to an event (subscription to various events can be linked)
FileSystem::getEventFileChanged().connect(filechanged_event_connections, filechanged_event_handler);

// other subscriptions are also linked to this EventConnections instance 
// (e.g. you can subscribe using lambdas)
FileSystem::getEventFileChanged().connect(filechanged_event_connections, [](const UGUID & guid,  const char * path) { 
		Log::message("\Handling FileChanged event (lambda).\n");
	}
);

// ...

// later all of these linked subscriptions can be removed with a single line
filechanged_event_connections.disconnectAll();

//////////////////////////////////////////////////////////////////////////////
//  2. You can subscribe and unsubscribe via an instance of the EventConnection 
//  class. And toggle this particular connection off and on, when necessary.
//////////////////////////////////////////////////////////////////////////////

// create an instance of the EventConnection class
EventConnection filechanged_event_connection;

// subscribe to the FileChanged event with a handler function keeping the connection
FileSystem::getEventFileChanged().connect(filechanged_event_connection, filechanged_event_handler);

// ...

// you can temporarily disable a particular event connection to perform certain actions
filechanged_event_connection.setEnabled(false);

// ... actions to be performed

// and enable it back when necessary
filechanged_event_connection.setEnabled(true);

// ...

// remove subscription to the FileChanged event via the connection
filechanged_event_connection.disconnect();

//////////////////////////////////////////////////////////////////////////////
//  3. You can add EventConnection/EventConnections instance as a member of the
//  class that handles the event. In this case all linked subscriptions will be 
//  automatically removed when class destructor is called
//////////////////////////////////////////////////////////////////////////////

// Class handling the event
class SomeClass
{
public:
	// instance of the EventConnections class as a class member
	EventConnections e_connections;

	// A FileChanged event handler implemented as a class member
	void event_handler(const UGUID & guid,  const char * path)
	{
		Log::message("\Handling FileChanged event\n");
		// ...
	}
};

SomeClass *sc = new SomeClass();

// ...

// specify a class instance in case a handler method belongs to some class
FileSystem::getEventFileChanged().connect(sc->e_connections, sc, &SomeClass::event_handler);

// ...

// handler class instance is deleted with all its subscriptions removed automatically
delete sc;


//////////////////////////////////////////////////////////////////////////////
//   4. Subscribe to an event saving a particular connection ID
//   and unsubscribe later by this ID
//////////////////////////////////////////////////////////////////////////////
// instance of the EventConnections class to manage event connections
EventConnections e_connections;

// define a particular connection ID to be used to unsubscribe later
EventConnectionId filechanged_handler_id;

// subscribe to the FileChanged event with a lambda handler function and keeping connection ID
filechanged_handler_id = FileSystem::getEventFileChanged().connect(e_connections, [](const UGUID & guid,  const char * path) { 
		Log::message("\Handling FileChanged event (lambda).\n");
	}
);

// remove the subscription later using the ID
FileSystem::getEventFileChanged().disconnect(filechanged_handler_id);


//////////////////////////////////////////////////////////////////////////////
//   5. Ignoring all FileChanged events when necessary
//////////////////////////////////////////////////////////////////////////////

// you can temporarily disable the event to perform certain actions without triggering it
FileSystem::getEventFileChanged().setEnabled(false);

// ... actions to be performed

// and enable it back when necessary
FileSystem::getEventFileChanged().setEnabled(true);

Return value

Event reference.

static Event<const UGUID &, const char *> getEventFileRemoved() const#

Event triggered when the file is removed using the FileSystem API. You can subscribe to events via connect() and unsubscribe via disconnect(). You can also use EventConnection and EventConnections classes for convenience (see examples below).

Notice

For more details see the Event Handling article.

The event handler signature is as follows: myhandler(const UGUID & guid, const char * path)

Usage Example

Source code (C++)

// implement the FileRemoved event handler
void fileremoved_event_handler(const UGUID & guid,  const char * path)
{
	Log::message("\Handling FileRemoved event\n");
}


//////////////////////////////////////////////////////////////////////////////
//  1. Multiple subscriptions can be linked to an instance of the EventConnections 
//  class that you can use later to remove all these subscriptions at once
//////////////////////////////////////////////////////////////////////////////

// create an instance of the EventConnections class
EventConnections fileremoved_event_connections;

// link to this instance when subscribing to an event (subscription to various events can be linked)
FileSystem::getEventFileRemoved().connect(fileremoved_event_connections, fileremoved_event_handler);

// other subscriptions are also linked to this EventConnections instance 
// (e.g. you can subscribe using lambdas)
FileSystem::getEventFileRemoved().connect(fileremoved_event_connections, [](const UGUID & guid,  const char * path) { 
		Log::message("\Handling FileRemoved event (lambda).\n");
	}
);

// ...

// later all of these linked subscriptions can be removed with a single line
fileremoved_event_connections.disconnectAll();

//////////////////////////////////////////////////////////////////////////////
//  2. You can subscribe and unsubscribe via an instance of the EventConnection 
//  class. And toggle this particular connection off and on, when necessary.
//////////////////////////////////////////////////////////////////////////////

// create an instance of the EventConnection class
EventConnection fileremoved_event_connection;

// subscribe to the FileRemoved event with a handler function keeping the connection
FileSystem::getEventFileRemoved().connect(fileremoved_event_connection, fileremoved_event_handler);

// ...

// you can temporarily disable a particular event connection to perform certain actions
fileremoved_event_connection.setEnabled(false);

// ... actions to be performed

// and enable it back when necessary
fileremoved_event_connection.setEnabled(true);

// ...

// remove subscription to the FileRemoved event via the connection
fileremoved_event_connection.disconnect();

//////////////////////////////////////////////////////////////////////////////
//  3. You can add EventConnection/EventConnections instance as a member of the
//  class that handles the event. In this case all linked subscriptions will be 
//  automatically removed when class destructor is called
//////////////////////////////////////////////////////////////////////////////

// Class handling the event
class SomeClass
{
public:
	// instance of the EventConnections class as a class member
	EventConnections e_connections;

	// A FileRemoved event handler implemented as a class member
	void event_handler(const UGUID & guid,  const char * path)
	{
		Log::message("\Handling FileRemoved event\n");
		// ...
	}
};

SomeClass *sc = new SomeClass();

// ...

// specify a class instance in case a handler method belongs to some class
FileSystem::getEventFileRemoved().connect(sc->e_connections, sc, &SomeClass::event_handler);

// ...

// handler class instance is deleted with all its subscriptions removed automatically
delete sc;


//////////////////////////////////////////////////////////////////////////////
//   4. Subscribe to an event saving a particular connection ID
//   and unsubscribe later by this ID
//////////////////////////////////////////////////////////////////////////////
// instance of the EventConnections class to manage event connections
EventConnections e_connections;

// define a particular connection ID to be used to unsubscribe later
EventConnectionId fileremoved_handler_id;

// subscribe to the FileRemoved event with a lambda handler function and keeping connection ID
fileremoved_handler_id = FileSystem::getEventFileRemoved().connect(e_connections, [](const UGUID & guid,  const char * path) { 
		Log::message("\Handling FileRemoved event (lambda).\n");
	}
);

// remove the subscription later using the ID
FileSystem::getEventFileRemoved().disconnect(fileremoved_handler_id);


//////////////////////////////////////////////////////////////////////////////
//   5. Ignoring all FileRemoved events when necessary
//////////////////////////////////////////////////////////////////////////////

// you can temporarily disable the event to perform certain actions without triggering it
FileSystem::getEventFileRemoved().setEnabled(false);

// ... actions to be performed

// and enable it back when necessary
FileSystem::getEventFileRemoved().setEnabled(true);

Return value

Event reference.

static Event<const UGUID &, const char *> getEventFileAdded() const#

Event triggered when the file is added using the FileSystem API. You can subscribe to events via connect() and unsubscribe via disconnect(). You can also use EventConnection and EventConnections classes for convenience (see examples below).

Notice

For more details see the Event Handling article.

The event handler signature is as follows: myhandler(const UGUID & guid, const char * path)

Usage Example

Source code (C++)

// implement the FileAdded event handler
void fileadded_event_handler(const UGUID & guid,  const char * path)
{
	Log::message("\Handling FileAdded event\n");
}


//////////////////////////////////////////////////////////////////////////////
//  1. Multiple subscriptions can be linked to an instance of the EventConnections 
//  class that you can use later to remove all these subscriptions at once
//////////////////////////////////////////////////////////////////////////////

// create an instance of the EventConnections class
EventConnections fileadded_event_connections;

// link to this instance when subscribing to an event (subscription to various events can be linked)
FileSystem::getEventFileAdded().connect(fileadded_event_connections, fileadded_event_handler);

// other subscriptions are also linked to this EventConnections instance 
// (e.g. you can subscribe using lambdas)
FileSystem::getEventFileAdded().connect(fileadded_event_connections, [](const UGUID & guid,  const char * path) { 
		Log::message("\Handling FileAdded event (lambda).\n");
	}
);

// ...

// later all of these linked subscriptions can be removed with a single line
fileadded_event_connections.disconnectAll();

//////////////////////////////////////////////////////////////////////////////
//  2. You can subscribe and unsubscribe via an instance of the EventConnection 
//  class. And toggle this particular connection off and on, when necessary.
//////////////////////////////////////////////////////////////////////////////

// create an instance of the EventConnection class
EventConnection fileadded_event_connection;

// subscribe to the FileAdded event with a handler function keeping the connection
FileSystem::getEventFileAdded().connect(fileadded_event_connection, fileadded_event_handler);

// ...

// you can temporarily disable a particular event connection to perform certain actions
fileadded_event_connection.setEnabled(false);

// ... actions to be performed

// and enable it back when necessary
fileadded_event_connection.setEnabled(true);

// ...

// remove subscription to the FileAdded event via the connection
fileadded_event_connection.disconnect();

//////////////////////////////////////////////////////////////////////////////
//  3. You can add EventConnection/EventConnections instance as a member of the
//  class that handles the event. In this case all linked subscriptions will be 
//  automatically removed when class destructor is called
//////////////////////////////////////////////////////////////////////////////

// Class handling the event
class SomeClass
{
public:
	// instance of the EventConnections class as a class member
	EventConnections e_connections;

	// A FileAdded event handler implemented as a class member
	void event_handler(const UGUID & guid,  const char * path)
	{
		Log::message("\Handling FileAdded event\n");
		// ...
	}
};

SomeClass *sc = new SomeClass();

// ...

// specify a class instance in case a handler method belongs to some class
FileSystem::getEventFileAdded().connect(sc->e_connections, sc, &SomeClass::event_handler);

// ...

// handler class instance is deleted with all its subscriptions removed automatically
delete sc;


//////////////////////////////////////////////////////////////////////////////
//   4. Subscribe to an event saving a particular connection ID
//   and unsubscribe later by this ID
//////////////////////////////////////////////////////////////////////////////
// instance of the EventConnections class to manage event connections
EventConnections e_connections;

// define a particular connection ID to be used to unsubscribe later
EventConnectionId fileadded_handler_id;

// subscribe to the FileAdded event with a lambda handler function and keeping connection ID
fileadded_handler_id = FileSystem::getEventFileAdded().connect(e_connections, [](const UGUID & guid,  const char * path) { 
		Log::message("\Handling FileAdded event (lambda).\n");
	}
);

// remove the subscription later using the ID
FileSystem::getEventFileAdded().disconnect(fileadded_handler_id);


//////////////////////////////////////////////////////////////////////////////
//   5. Ignoring all FileAdded events when necessary
//////////////////////////////////////////////////////////////////////////////

// you can temporarily disable the event to perform certain actions without triggering it
FileSystem::getEventFileAdded().setEnabled(false);

// ... actions to be performed

// and enable it back when necessary
FileSystem::getEventFileAdded().setEnabled(true);

Return value

Event reference.

static Event<const Vector<FilePath> &> getEventFilesChanged() const#

Event triggered at the end of the Engine::update() containing the files changed during the frame. You can subscribe to events via connect() and unsubscribe via disconnect(). You can also use EventConnection and EventConnections classes for convenience (see examples below).

Notice

For more details see the Event Handling article.

The event handler signature is as follows: myhandler(const Vector<FilePath> & paths)

Usage Example

Source code (C++)

// implement the FilesChanged event handler
void fileschanged_event_handler(const Vector<FilePath> & paths)
{
	Log::message("\Handling FilesChanged event\n");
}


//////////////////////////////////////////////////////////////////////////////
//  1. Multiple subscriptions can be linked to an instance of the EventConnections 
//  class that you can use later to remove all these subscriptions at once
//////////////////////////////////////////////////////////////////////////////

// create an instance of the EventConnections class
EventConnections fileschanged_event_connections;

// link to this instance when subscribing to an event (subscription to various events can be linked)
FileSystem::getEventFilesChanged().connect(fileschanged_event_connections, fileschanged_event_handler);

// other subscriptions are also linked to this EventConnections instance 
// (e.g. you can subscribe using lambdas)
FileSystem::getEventFilesChanged().connect(fileschanged_event_connections, [](const Vector<FilePath> & paths) { 
		Log::message("\Handling FilesChanged event (lambda).\n");
	}
);

// ...

// later all of these linked subscriptions can be removed with a single line
fileschanged_event_connections.disconnectAll();

//////////////////////////////////////////////////////////////////////////////
//  2. You can subscribe and unsubscribe via an instance of the EventConnection 
//  class. And toggle this particular connection off and on, when necessary.
//////////////////////////////////////////////////////////////////////////////

// create an instance of the EventConnection class
EventConnection fileschanged_event_connection;

// subscribe to the FilesChanged event with a handler function keeping the connection
FileSystem::getEventFilesChanged().connect(fileschanged_event_connection, fileschanged_event_handler);

// ...

// you can temporarily disable a particular event connection to perform certain actions
fileschanged_event_connection.setEnabled(false);

// ... actions to be performed

// and enable it back when necessary
fileschanged_event_connection.setEnabled(true);

// ...

// remove subscription to the FilesChanged event via the connection
fileschanged_event_connection.disconnect();

//////////////////////////////////////////////////////////////////////////////
//  3. You can add EventConnection/EventConnections instance as a member of the
//  class that handles the event. In this case all linked subscriptions will be 
//  automatically removed when class destructor is called
//////////////////////////////////////////////////////////////////////////////

// Class handling the event
class SomeClass
{
public:
	// instance of the EventConnections class as a class member
	EventConnections e_connections;

	// A FilesChanged event handler implemented as a class member
	void event_handler(const Vector<FilePath> & paths)
	{
		Log::message("\Handling FilesChanged event\n");
		// ...
	}
};

SomeClass *sc = new SomeClass();

// ...

// specify a class instance in case a handler method belongs to some class
FileSystem::getEventFilesChanged().connect(sc->e_connections, sc, &SomeClass::event_handler);

// ...

// handler class instance is deleted with all its subscriptions removed automatically
delete sc;


//////////////////////////////////////////////////////////////////////////////
//   4. Subscribe to an event saving a particular connection ID
//   and unsubscribe later by this ID
//////////////////////////////////////////////////////////////////////////////
// instance of the EventConnections class to manage event connections
EventConnections e_connections;

// define a particular connection ID to be used to unsubscribe later
EventConnectionId fileschanged_handler_id;

// subscribe to the FilesChanged event with a lambda handler function and keeping connection ID
fileschanged_handler_id = FileSystem::getEventFilesChanged().connect(e_connections, [](const Vector<FilePath> & paths) { 
		Log::message("\Handling FilesChanged event (lambda).\n");
	}
);

// remove the subscription later using the ID
FileSystem::getEventFilesChanged().disconnect(fileschanged_handler_id);


//////////////////////////////////////////////////////////////////////////////
//   5. Ignoring all FilesChanged events when necessary
//////////////////////////////////////////////////////////////////////////////

// you can temporarily disable the event to perform certain actions without triggering it
FileSystem::getEventFilesChanged().setEnabled(false);

// ... actions to be performed

// and enable it back when necessary
FileSystem::getEventFilesChanged().setEnabled(true);

Return value

Event reference.

static Event<const Vector<FilePath> &> getEventFilesRemoved() const#

Event triggered at the end of the Engine::update() containing the files removed during the frame. You can subscribe to events via connect() and unsubscribe via disconnect(). You can also use EventConnection and EventConnections classes for convenience (see examples below).

Notice

For more details see the Event Handling article.

The event handler signature is as follows: myhandler(const Vector<FilePath> & paths)

Usage Example

Source code (C++)

// implement the FilesRemoved event handler
void filesremoved_event_handler(const Vector<FilePath> & paths)
{
	Log::message("\Handling FilesRemoved event\n");
}


//////////////////////////////////////////////////////////////////////////////
//  1. Multiple subscriptions can be linked to an instance of the EventConnections 
//  class that you can use later to remove all these subscriptions at once
//////////////////////////////////////////////////////////////////////////////

// create an instance of the EventConnections class
EventConnections filesremoved_event_connections;

// link to this instance when subscribing to an event (subscription to various events can be linked)
FileSystem::getEventFilesRemoved().connect(filesremoved_event_connections, filesremoved_event_handler);

// other subscriptions are also linked to this EventConnections instance 
// (e.g. you can subscribe using lambdas)
FileSystem::getEventFilesRemoved().connect(filesremoved_event_connections, [](const Vector<FilePath> & paths) { 
		Log::message("\Handling FilesRemoved event (lambda).\n");
	}
);

// ...

// later all of these linked subscriptions can be removed with a single line
filesremoved_event_connections.disconnectAll();

//////////////////////////////////////////////////////////////////////////////
//  2. You can subscribe and unsubscribe via an instance of the EventConnection 
//  class. And toggle this particular connection off and on, when necessary.
//////////////////////////////////////////////////////////////////////////////

// create an instance of the EventConnection class
EventConnection filesremoved_event_connection;

// subscribe to the FilesRemoved event with a handler function keeping the connection
FileSystem::getEventFilesRemoved().connect(filesremoved_event_connection, filesremoved_event_handler);

// ...

// you can temporarily disable a particular event connection to perform certain actions
filesremoved_event_connection.setEnabled(false);

// ... actions to be performed

// and enable it back when necessary
filesremoved_event_connection.setEnabled(true);

// ...

// remove subscription to the FilesRemoved event via the connection
filesremoved_event_connection.disconnect();

//////////////////////////////////////////////////////////////////////////////
//  3. You can add EventConnection/EventConnections instance as a member of the
//  class that handles the event. In this case all linked subscriptions will be 
//  automatically removed when class destructor is called
//////////////////////////////////////////////////////////////////////////////

// Class handling the event
class SomeClass
{
public:
	// instance of the EventConnections class as a class member
	EventConnections e_connections;

	// A FilesRemoved event handler implemented as a class member
	void event_handler(const Vector<FilePath> & paths)
	{
		Log::message("\Handling FilesRemoved event\n");
		// ...
	}
};

SomeClass *sc = new SomeClass();

// ...

// specify a class instance in case a handler method belongs to some class
FileSystem::getEventFilesRemoved().connect(sc->e_connections, sc, &SomeClass::event_handler);

// ...

// handler class instance is deleted with all its subscriptions removed automatically
delete sc;


//////////////////////////////////////////////////////////////////////////////
//   4. Subscribe to an event saving a particular connection ID
//   and unsubscribe later by this ID
//////////////////////////////////////////////////////////////////////////////
// instance of the EventConnections class to manage event connections
EventConnections e_connections;

// define a particular connection ID to be used to unsubscribe later
EventConnectionId filesremoved_handler_id;

// subscribe to the FilesRemoved event with a lambda handler function and keeping connection ID
filesremoved_handler_id = FileSystem::getEventFilesRemoved().connect(e_connections, [](const Vector<FilePath> & paths) { 
		Log::message("\Handling FilesRemoved event (lambda).\n");
	}
);

// remove the subscription later using the ID
FileSystem::getEventFilesRemoved().disconnect(filesremoved_handler_id);


//////////////////////////////////////////////////////////////////////////////
//   5. Ignoring all FilesRemoved events when necessary
//////////////////////////////////////////////////////////////////////////////

// you can temporarily disable the event to perform certain actions without triggering it
FileSystem::getEventFilesRemoved().setEnabled(false);

// ... actions to be performed

// and enable it back when necessary
FileSystem::getEventFilesRemoved().setEnabled(true);

Return value

Event reference.

static Event<const Vector<FilePath> &> getEventFilesAdded() const#

Event triggered at the end of the Engine::update() containing the files added during the frame. You can subscribe to events via connect() and unsubscribe via disconnect(). You can also use EventConnection and EventConnections classes for convenience (see examples below).

Notice

For more details see the Event Handling article.

The event handler signature is as follows: myhandler(const Vector<FilePath> & paths)

Usage Example

Source code (C++)

// implement the FilesAdded event handler
void filesadded_event_handler(const Vector<FilePath> & paths)
{
	Log::message("\Handling FilesAdded event\n");
}


//////////////////////////////////////////////////////////////////////////////
//  1. Multiple subscriptions can be linked to an instance of the EventConnections 
//  class that you can use later to remove all these subscriptions at once
//////////////////////////////////////////////////////////////////////////////

// create an instance of the EventConnections class
EventConnections filesadded_event_connections;

// link to this instance when subscribing to an event (subscription to various events can be linked)
FileSystem::getEventFilesAdded().connect(filesadded_event_connections, filesadded_event_handler);

// other subscriptions are also linked to this EventConnections instance 
// (e.g. you can subscribe using lambdas)
FileSystem::getEventFilesAdded().connect(filesadded_event_connections, [](const Vector<FilePath> & paths) { 
		Log::message("\Handling FilesAdded event (lambda).\n");
	}
);

// ...

// later all of these linked subscriptions can be removed with a single line
filesadded_event_connections.disconnectAll();

//////////////////////////////////////////////////////////////////////////////
//  2. You can subscribe and unsubscribe via an instance of the EventConnection 
//  class. And toggle this particular connection off and on, when necessary.
//////////////////////////////////////////////////////////////////////////////

// create an instance of the EventConnection class
EventConnection filesadded_event_connection;

// subscribe to the FilesAdded event with a handler function keeping the connection
FileSystem::getEventFilesAdded().connect(filesadded_event_connection, filesadded_event_handler);

// ...

// you can temporarily disable a particular event connection to perform certain actions
filesadded_event_connection.setEnabled(false);

// ... actions to be performed

// and enable it back when necessary
filesadded_event_connection.setEnabled(true);

// ...

// remove subscription to the FilesAdded event via the connection
filesadded_event_connection.disconnect();

//////////////////////////////////////////////////////////////////////////////
//  3. You can add EventConnection/EventConnections instance as a member of the
//  class that handles the event. In this case all linked subscriptions will be 
//  automatically removed when class destructor is called
//////////////////////////////////////////////////////////////////////////////

// Class handling the event
class SomeClass
{
public:
	// instance of the EventConnections class as a class member
	EventConnections e_connections;

	// A FilesAdded event handler implemented as a class member
	void event_handler(const Vector<FilePath> & paths)
	{
		Log::message("\Handling FilesAdded event\n");
		// ...
	}
};

SomeClass *sc = new SomeClass();

// ...

// specify a class instance in case a handler method belongs to some class
FileSystem::getEventFilesAdded().connect(sc->e_connections, sc, &SomeClass::event_handler);

// ...

// handler class instance is deleted with all its subscriptions removed automatically
delete sc;


//////////////////////////////////////////////////////////////////////////////
//   4. Subscribe to an event saving a particular connection ID
//   and unsubscribe later by this ID
//////////////////////////////////////////////////////////////////////////////
// instance of the EventConnections class to manage event connections
EventConnections e_connections;

// define a particular connection ID to be used to unsubscribe later
EventConnectionId filesadded_handler_id;

// subscribe to the FilesAdded event with a lambda handler function and keeping connection ID
filesadded_handler_id = FileSystem::getEventFilesAdded().connect(e_connections, [](const Vector<FilePath> & paths) { 
		Log::message("\Handling FilesAdded event (lambda).\n");
	}
);

// remove the subscription later using the ID
FileSystem::getEventFilesAdded().disconnect(filesadded_handler_id);


//////////////////////////////////////////////////////////////////////////////
//   5. Ignoring all FilesAdded events when necessary
//////////////////////////////////////////////////////////////////////////////

// you can temporarily disable the event to perform certain actions without triggering it
FileSystem::getEventFilesAdded().setEnabled(false);

// ... actions to be performed

// and enable it back when necessary
FileSystem::getEventFilesAdded().setEnabled(true);

Return value

Event reference.

Ptr<FileSystemMount> getMount ( const char * path ) const#

Returns a mount point for the specified path.

Notice

This method will return the root mount for all files located directly in the data folder or its subfolders.

Arguments

const char * path - File path, for which a mount point is to be found. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

FileSystemMount class smart pointer on success; otherwise, nullptr.

Ptr<FileSystemMount> getMount ( const UGUID & guid ) const#

Returns a mount point for the specified GUID.

Notice

This method will return the root mount for all files located directly in the data folder or its subfolders.

Arguments

const UGUID & guid - File GUID for which a mount point is to be found.

Return value

FileSystemMount class smart pointer on success; otherwise, nullptr.

void getMounts ( Vector<Ptr<FileSystemMount>> & OUT_container ) const#

Returns a list of all mount points currently used by the file system and puts the to the specified output buffer.

Notice

This list will not include the root mount.

Arguments

Vector<Ptr<FileSystemMount>> & OUT_container - Output buffer to store the list of all currently used mount points.
Notice
This output buffer is to be filled by the Engine as a result of executing the method.

Ptr<FileSystemMount> getRootMount ( ) const#

Returns the root mount of the file system. It mounts the data folder to the root of the virtual file system. The root mount cannot be unmounted.

Return value

FileSystemMount class smart pointer for the root mount of the virtual file system.

Ptr<FileSystemMount> createMount ( const char * absolute_path, const char * virtual_path, int access ) #

Adds a new mount point for the specified external folder/package, virtual path and access mode. All mounted files are automatically added as known to the virtual file system.

Arguments

const char * absolute_path - Absolute path to the mounted folder/package.
const char * virtual_path - Virtual path to the folder to which the contents of the external folder/package is to be mounted.
int access - Mount point access mode, one of the FileSystemMount::ACCESS_* values.

Return value

FileSystemMount class smart pointer, if it was created successfully; otherwise, nullptr.

Ptr<FileSystemMount> addMount ( const char * umount_path ) #

Adds a new mount point using the data from the specified *.umount file.All mounted files are automatically added as known to the virtual file system.

Arguments

const char * umount_path - Absolute path to a *.umount file.

Return value

FileSystemMount class smart pointer, if it was created successfully; otherwise, nullptr.

bool saveMountFile ( const char * umount_path ) const#

Saves the specified *.umount file.

Arguments

const char * umount_path - Mount point file path.

Return value

true if the specified *.umount file is saved successfully; otherwise, false.

bool removeMount ( const char * path ) #

Unmounts a mount point with a given path.

Notice

The root mount cannot be removed.

Arguments

const char * path - Absolute path to the mounted folder/package.

Return value

true if the mount point with a given path is successfully unmounted; otherwise, false.

void clearMounts ( ) #

Unmounts all mount points.

Notice

This method does not remove the root mount.

bool loadPackage ( const char * path ) #

Loads an UNG or ZIP package into the file system. Note that the package should be mounted, otherwise it won't be loaded.

NoticeUNG packages without password protection can be loaded even if the engine has built-in password for the file system packages. For example, it is possible to load both the core.ung package without a password and the my_assets.ung package protected with a password.

Arguments

const char * path - Package path. It can be a relative, absolute, network, or virtual path.

Return value

true if the package is loaded; otherwise, false.

bool loadPackage ( const char * path, const char * extension ) #

Loads a package with the specified extension (ung, zip, or pak) into the file system. Note that the package should be mounted, otherwise it won't be loaded.

NoticeUNG packages without password protection can be loaded even if the engine has built-in password for the file system packages. For example, it is possible to load both the core.ung package without a password and the my_assets.ung package protected with a password.

Arguments

const char * path - Package path. It can be a relative, absolute, network, or virtual path.
const char * extension - Extension of a custom package, one of the following values:
- ung
- zip
- pak

Return value

true if the package is loaded; otherwise, false.

bool removePackage ( const char * path ) #

Unloads an UNG or ZIP package from the file system.

Arguments

const char * path - Package path. It can be a relative, absolute, network, or virtual path.

Return value

true if the package is removed; otherwise, false.

void getSupportedPackagesExtensions ( Vector<String> & OUT_extensions ) const#

Returns a list of registered extensions that can be loaded as a package.

Arguments

Vector<String> & OUT_extensions - An array to store registered extensions.
Notice
This output buffer is to be filled by the Engine as a result of executing the method.

void getPackageVirtualFiles ( const char * path, Vector<String> & OUT_files ) const#

Saves the list of names for all virtual files stored in the specified package to the specified string buffer.

Arguments

const char * path - Path to a custom package. It can be a relative, absolute, network, or virtual path.
Vector<String> & OUT_files - String buffer to store the list of names for all virtual files stored in the specified package.
Notice
This output buffer is to be filled by the Engine as a result of executing the method.

void getPackageVirtualFiles ( const char * path, const char * extension, Vector<String> & OUT_files ) const#

Saves the list of names for all virtual files stored in a package with the specified name and extension to the specified string buffer.

Arguments

const char * path - Path to a custom package. It can be a relative, absolute, network, or virtual path.
const char * extension - Extension of a custom package, one of the following values:
- ung
- zip
- pak
Vector<String> & OUT_files - String buffer to store the list of names for all virtual files stored in the specified package.
Notice
This output buffer is to be filled by the Engine as a result of executing the method.

void preloadExternPackage ( Package * package ) #

Loads the custom package before the file system initialization. The method should be called before the Engine init.

Source code (C++)

// preload package
FileSystem::preloadExternPackage(new MyPackage());
// init engine
EnginePtr engine(argc, argv);

Arguments

Package * package - Custom package instance.

void preloadExternPackage ( const char * virtual_path, Package * package ) #

Loads the custom package before the file system initialization and sets a virtual path to it. The method should be called before the Engine init.

Arguments

const char * virtual_path - Virtual path to a custom package.
Package * package - Custom package instance.

void clearPreloadedExternPackages ( ) #

Clears all preloaded custom packages (packages loaded before the file system initialization).

bool addExternPackage ( Package * package ) #

Adds a custom package to the virtual file system.

Arguments

Package * package - Custom package instance.

Return value

true if the package is added successfully; otherwise, false.

bool addExternPackage ( const char * path, Package * package ) #

Adds a custom package to the virtual file system and assigns a virtual path to it. The virtual path is obtained by using the given path.

Arguments

const char * path - Path to a custom package. It can be a relative, absolute, network, or virtual path.
Package * package - Custom package instance.

Return value

true if the package is added successfully; otherwise, false.

void getVirtualFiles ( Vector<String> & OUT_files ) const#

Saves the list of names for all known files registered in the file system to the specified string buffer.

Arguments

Vector<String> & OUT_files - String buffer to store the list of names for all known virtual files.
Notice
This output buffer is to be filled by the Engine as a result of executing the method.

void getVirtualFiles ( Vector<UGUID> & OUT_files ) const#

Saves the list of GUIDs for all known files registered in the file system to the specified string buffer.

Arguments

Vector<UGUID> & OUT_files - String buffer to store the list of GUIDs for all known virtual files.
Notice
This output buffer is to be filled by the Engine as a result of executing the method.

bool isVirtualFile ( const char * path ) const#

Checks if the given file is known to the virtual file system.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.

Return value

true if the file is known to the virtual file system; otherwise, false.

bool isVirtualFile ( const UGUID & guid ) const#

Checks if a file with the given GUID is known to the virtual file system and has a virtual path registered.

Arguments

const UGUID & guid - File GUID.

Return value

true if the file is known to the virtual file system; otherwise, false.

bool addVirtualFile ( const char * path, const UGUID & guid, bool must_exist = false ) #

Registers the regular file name as known virtual file with the given GUID and appends it to the map used for fast searching. This method should be used when you need to add, for example, a new content to the project.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.
const UGUID & guid - File GUID.
bool must_exist - A flag indicating whether the specified file must exist.

Return value

true if the file name is appended successfully; otherwise, false.

UGUID addVirtualFile ( const char * path, bool must_exist = false ) #

Registers the regular file name as known virtual file and appends it to the map used for fast searching. This method should be used when you need to add, for example, a new content to the project.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.
bool must_exist - A flag indicating whether the specified file must exist.

Return value

File GUID if it was registered successfully or an empty GUID, otherwise.

bool renameVirtualFile ( const char * path, const char * new_path ) #

Renames the specified known virtual file.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.
const char * new_path - New path for the file.

Return value

true if the file is renamed successfully; otherwise, false.

bool renameVirtualFile ( const char * path, const char * new_path, const UGUID & new_guid ) #

Renames the specified known file and assigns it the specified new GUID.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.
const char * new_path - New path for the file.
const UGUID & new_guid - New GUID for the file.

Return value

true if the file is renamed successfully; otherwise, false.

bool renameVirtualFile ( const UGUID & guid, const char * new_path ) #

Renames the known virtual file with the given GUID.

Arguments

const UGUID & guid - File GUID.
const char * new_path - New path for the file.

Return value

true if the file is renamed successfully; otherwise, false.

bool renameVirtualFile ( const UGUID & guid, const char * new_path, const UGUID & new_guid ) #

Renames the known virtual file with the given GUID and assigns it the specified new GUID.

Arguments

const UGUID & guid - File GUID.
const char * new_path - New path for the file.
const UGUID & new_guid - New GUID for the file.

Return value

true if the file is renamed successfully; otherwise, false.

bool removeVirtualFile ( const char * path ) #

Removes the virtual file with the given name.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

true if the file is removed successfully; otherwise, false.

bool removeVirtualFile ( const UGUID & guid ) #

Removes the virtual file with the given GUID.

Arguments

const UGUID & guid - GUID of the known virtual file to remove.

Return value

true if the file is removed successfully; otherwise, false.

bool changeVirtualFile ( const char * path ) #

Marks the virtual file with the given name as modified. The corresponding CALLBACK_FILE_CHANGED signal is emitted. This method is used to notify the Engine that a resource has been modified and needs to be updated.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

true if the file is successfully marked as modified; otherwise, false.

bool changeVirtualFile ( const UGUID & guid ) #

Marks the virtual file with the given GUID as modified. The corresponding CALLBACK_FILE_CHANGED signal is emitted. This method is used to notify the Engine that a resource has been modified and needs to be updated.

Arguments

const UGUID & guid - GUID of the known virtual file to remove.

Return value

true if the file is successfully marked as modified; otherwise, false.

void removeNonExistingVirtualFiles ( ) #

Removes all non-existing virtual files from the File System. These files aren't physically exist on the disk, however, they are added to the virtual file system. For example, it can be a blob or a cache file.

bool isBlobFile ( const char * path ) const#

Checks if the given file is loaded to a blob.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

true if the file is loaded to a blob successfully; otherwise, false.

bool isBlobFile ( const UGUID & guid ) const#

Checks if a file with the given GUID is loaded to a blob.

Arguments

const UGUID & guid - File GUID.

Return value

true if the file is loaded to a blob successfully; otherwise, false.

bool addBlobFile ( const char * path ) #

Adds a file into a blob. It can be used for files that are frequently modified at run time (for example, images). After such file is loaded from a disk and written into a blob in the memory, its modifications can be saved fast into this blob.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

true if the file is successfully added into a blob; otherwise, false.

bool addBlobFile ( const UGUID & guid ) #

Adds a file with the given GUID into a blob. It can be used for files that are frequently modified at run time (for example, images). After such file is loaded from a disk and written into a blob in the memory, its modifications can be saved fast into this blob.

Arguments

const UGUID & guid - File GUID.

Return value

true if the file is successfully added into a blob; otherwise, false.

bool removeBlobFile ( const char * path ) #

Removes a file from the blob. Blobbing can be used for files that are frequently modified at run time (for example, images). After such file is loaded from a disk and written into a blob in the memory, its modifications can be saved fast into this blob.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

true if the file is removed successfully; otherwise, false.

bool removeBlobFile ( const UGUID & guid ) #

Removes a file with the given GUID from the blob. Blobbing can be used for files that are frequently modified at run time (for example, images). After such file is loaded from a disk and written into a blob in the memory, its modifications can be saved fast into this blob.

Arguments

const UGUID & guid - File GUID.

Return value

true if the file is removed successfully; otherwise, false.

bool isCacheFile ( const char * path ) const#

Checks if the given file is loaded into cache.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

true if the file is added into cache; otherwise, false.

bool isCacheFile ( const UGUID & guid ) const#

Checks if a file with the given GUID is loaded into cache.

Arguments

const UGUID & guid - File GUID.

Return value

true if the file is added into cache; otherwise, false.

bool addCacheFile ( const char * path ) #

Caches a file in the memory. It can be used for files that are accessed multiple times at run time (for example, textures are read two times in a row). Such files are loaded into the memory for faster reading.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

true if the file is successfully added to cache; otherwise, false.

bool addCacheFile ( const UGUID & guid ) #

Caches a file in the memory with the given GUID. It can be used for files that are accessed multiple times at run time (for example, textures are read two times in a row). Such files are loaded into the memory for faster reading.

Arguments

const UGUID & guid - File GUID.

Return value

true if the file is successfully added to cache; otherwise, false.

bool removeCacheFile ( const char * path ) #

Removes a cached file from the memory. Caching can be used for files that are accessed multiple times at run time (for example, textures are read two times in a row). Such files are loaded into the memory for faster reading.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

true if the file is successfully removed from cache; otherwise, false.

bool removeCacheFile ( const UGUID & guid ) #

Removes a cached file with the given GUID from the memory. Caching can be used for files that are accessed multiple times at run time (for example, textures are read two times in a row). Such files are loaded into the memory for faster reading.

Arguments

const UGUID & guid - File GUID.

Return value

true if the file is successfully removed from cache; otherwise, false.

bool isDiskFile ( const char * path ) const#

Returns a value indicating if the specified file path is a path to a file on disk (i.e. not a package, a blob, or a cache file).

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

true if the specified file path is a path to a file on disk; otherwise, false.

bool isDiskFile ( const UGUID & guid ) const#

Returns a value indicating if the file with the specified GUID is a file on disk.

Arguments

const UGUID & guid - Any file GUID.

Return value

true if the file with the specified GUID is a file on disk; otherwise, false.

bool isPackageFile ( const char * path ) const#

Returns a value indicating if the specified file path is a path to a file inside a ZIP or UNG package.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.

Return value

true if the specified file path is a path to a file inside a ZIP or UNG package; otherwise, false.

bool isPackageFile ( const UGUID & guid ) const#

Returns a value indicating if the file with the specified GUID is file inside a ZIP or UNG package.

Arguments

const UGUID & guid - Any file GUID.

Return value

true if the file with the specified GUID is file inside a ZIP or UNG package; otherwise, false.

String resolvePartialVirtualPath ( const char * path ) const#

Converts the given partial path to a full virtual one.

NoticeIf the file isn't added to the virtual file system, the full virtual path won't be returned.

For example, if you have the data/project/image_1.tga and want to use the partial virtual path image_1.tga, you should get the full virtual path first:

Source code (C++)

// convert partial virtual to full virtual path
String full_virtual_path = FileSystem::resolvePartialVirtualPath("image_1.tga"); // project/image_1.tga is returned
// use the converted path
Image::create(full_virtual_path);

Arguments

const char * path - Partial path to be resolved.

Return value

Full virtual path.

String getVirtualPath ( const char * path ) const#

Resolves a virtual path for the given file path. The following examples show particular cases of the method usage:

If the given path is known for the virtual file system, the following can be returned:

Source code (C++)

String s1, s2, s3, s4;
// absolute path to the folder
s1 = FileSystem::getVirtualPath("D:/Unigine/data");			// an empty string
s2 = FileSystem::getVirtualPath("D:/Unigine/data/");		// an empty string
// path to assets in the folder
s3 = FileSystem::getVirtualPath("asset://D:/Unigine/data");	// an empty string
s4 = FileSystem::getVirtualPath("asset://D:/Unigine/data/");// an empty string

In all cases, an empty string is returned: a virtual path is always returned relative to the data directory, and in the example, the data directory itself is specified. If you specify a known file inside it, the corresponding virtual path will be returned:

Source code (C++)

String s = FileSystem::getVirtualPath("D:/Unigine/data/1.tga");		// "1.tga"

If the given path is unknown for the virtual file system, the following can be returned:

Source code (C++)

// absolute path to the folder
s1 = FileSystem::getVirtualPath("C:/temp");			// "C:/temp"
s2 = FileSystem::getVirtualPath("C:/temp/");		// "C:/temp"
// path to assets in the folder
s3 = FileSystem::getVirtualPath("asset://C:/temp");	// "C:/temp"
s4 = FileSystem::getVirtualPath("asset://C:/temp/");// "C:/temp"

In all cases, the normalized path to the folder is returned, as the specified folder is unknown for the virtual file system, and, therefore, no virtual path can be returned. The same is for files, for example:

Source code (C++)

s = FileSystem::getVirtualPath("C:/temp/1.tga");			// "C:/temp/1.tga"

If the given path is the path to a mounted file. Here mount_1 is the mount_1.umount mount point. Note that in the example below, the 1.tga asset has no runtime files. If an asset has a runtime file, the virtual path to this runtime file (stored in the .runtimes folder of the mount point) will be returned.

Source code (C++)

// virtual path to the file specified as an absolute one
s1 = FileSystem::getVirtualPath("D:/Unigine/data/mounts/mount_1/1.tga");// "mounts/mount_1/1.tga"
// absolute path to the file
s2 = FileSystem::getVirtualPath("D:/extern_content/1.tga");				// "mounts/mount_1/1.tga"
// full virtual path to the file
s3 = FileSystem::getVirtualPath("mounts/mount_1/1.tga");				// "mounts/mount_1/1.tga"

If the given path is the path to a mounted file stored in the nested mount points. Here mount_1 and mount_2 are the mount_1.umount and mount_2.umount mount points correspondingly. Note that in the example below, the 1.tga asset has no runtime files. If an asset has a runtime file, the virtual path to this runtime file (stored in the .runtimes folder of the mount point) will be returned.

Source code (C++)

// virtual path to the file specified as an absolute one
s1 = FileSystem::getVirtualPath("D:/Unigine/data/mounts/mount_1/mount_2/1.tga");	// "mounts/mount_1/mount_2/1.tga"
// absolute path to the file
s2 = FileSystem::getVirtualPath("D:/extern_content_2/1.tga");						// "mounts/mount_1/mount_2/1.tga"
// full virtual path to the file
s3 = FileSystem::getVirtualPath("mounts/mount_1/mount_2/1.tga");					// "mounts/mount_1/mount_2/1.tga"

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path, including a path to a folder.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

Virtual path to the file relative to the data folder.

String getVirtualPath ( const UGUID & guid ) const#

Resolves a virtual path for the given GUID.

Arguments

const UGUID & guid - File GUID.

Return value

Virtual path to the file relative to the data folder.

String getAbsolutePath ( const char * path ) const#

Resolves an absolute path for the given file path. The following examples show particular cases of the method usage:

If the given path is known for the virtual file system, the following can be returned:

Source code (C++)

String s1, s2, s3, s4;
// absolute path to the folder
s1 = FileSystem::getAbsolutePath("D:/Unigine/data");			// "D:/Unigine/data"
s2 = FileSystem::getAbsolutePath("D:/Unigine/data/");			// "D:/Unigine/data"
// absolute path to assets in the folder
s3 = FileSystem::getAbsolutePath("asset://D:/Unigine/data");	// "D:/Unigine/data"
s4 = FileSystem::getAbsolutePath("asset://D:/Unigine/data/");	// "D:/Unigine/data"

If the given path is unknown for the virtual file system, the following can be returned:

Source code (C++)

// absolute path to the folder
s1 = FileSystem::getAbsolutePath("C:/temp");				// "C:/temp"
s2 = FileSystem::getAbsolutePath("C:/temp/");				// "C:/temp"
// absolute path to assets in the folder
s3 = FileSystem::getAbsolutePath("asset://C:/temp");		// "C:/temp"
s4 = FileSystem::getAbsolutePath("asset://C:/temp/");		// "C:/temp"

If the given path is the path to a mounted file. Here mount_1 is the mount_1.umount mount point. Note that in the example below, the 1.tga asset has no runtime files. If an asset has a runtime file, the absolute path to this runtime file (stored in the .runtimes folder of the mount point) will be returned.

Source code (C++)

// virtual path specified as an absolute one
s1 = FileSystem::getAbsolutePath("D:/Unigine/data/mounts/mount_1/1.tga");		// "D:/extern_content/1.tga"
// absolute path
s2 = FileSystem::getAbsolutePath("D:/extern_content/1.tga");					// "D:/extern_content/1.tga"
// virtual path
s3 = FileSystem::getAbsolutePath("mounts/mount_1/1.tga");						// "D:/extern_content/1.tga"

If the given path is the path to a mounted file stored in the nested mount points. Here mount_1 and mount_2 are the mount_1.umount and mount_2.umount mount points correspondingly. Note that in the example below, the 1.tga asset has no runtime files. If an asset has a runtime file, the absolute path to this runtime file (stored in the .runtimes folder of the mount point) will be returned.
Source code (C++)
```
// virtual path specified as an absolute one
s1 = FileSystem::getAbsolutePath("D:/UnigineGIT/data/mounts/mount_1/mount_2/1.tga");// "D:/extern_content_2/1.tga"
// absolute path
s2 = FileSystem::getAbsolutePath("D:/extern_content_2/1.tga");						// "D:/extern_content_2/1.tga"
// virtual path
s3 = FileSystem::getAbsolutePath("mounts/mount_1/mount_2/1.tga");					// "D:/extern_content_2/1.tga"
```

If the given path is a network path:

Source code (C++)

s1 = FileSystem::getAbsolutePath("//studio/work/shared_content/images.zip");			// "//studio/work/shared_content/images.zip"
s2 = FileSystem::getAbsolutePath("\\\\studio\\work\\shared_content\\images.zip");		// "//studio/work/shared_content/images.zip"

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path, including a path to a folder.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

Absolute path to the file.

String getAbsolutePath ( const UGUID & guid ) const#

Resolves an absolute path for the given file GUID.

Arguments

const UGUID & guid - File GUID.

Return value

Absolute path to the file.

String getPackageVirtualPath ( const char * path ) const#

Resolves a virtual path for the given path to the package.

Arguments

const char * path - Path to a package. It can be a relative, absolute, network, or virtual path.

Return value

Virtual path to the package.

String getPackageVirtualPath ( const UGUID & guid ) const#

Resolves a virtual path for the given GUID.

Arguments

const UGUID & guid - Package GUID.

Return value

Virtual path to the package.

String getPackageAbsolutePath ( const char * path ) const#

Resolves an absolute path for the given path to the package.

Arguments

const char * path - Path to a package. It can be a relative, absolute, network, or virtual path.

Return value

Absolute path to the package.

String getPackageAbsolutePath ( const UGUID & guid ) const#

Resolves an absolute path for the given package GUID.

Arguments

const UGUID & guid - Package GUID.

Return value

Absolute path to the package.

String getExtension ( const char * path ) const#

Returns the extension for the given file.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

File extension in lower case, if any; otherwise, an empty string.

String getExtension ( const UGUID & guid ) const#

Returns the extension for a file with the specified GUID.

Arguments

const UGUID & guid - GUID of the file for which extension is to be returned.

Return value

File extension in lower case if any; otherwise, an empty string.

bool isFileExist ( const char * path ) const#

Checks if the given file actually exists on the disk.

NoticeCalling this method every frame in the main thread, especially for multiple files, may cause a performance hit. It is better to optimize such checks and move them to a separate thread.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

true if the file exists; otherwise, false.

bool isFileExist ( const UGUID & guid ) const#

Checks if a file with the given GUID actually exists.

NoticeCalling this method every frame in the main thread, especially for multiple files, may cause a performance hit. It is better to optimize such checks and move them to a separate thread.

Arguments

const UGUID & guid - File GUID.

Return value

true if the file exists; otherwise, false.

bool isGUIDPath ( const char * path ) const#

Returns a value indicating if the given path has a valid GUID path format (e.g. "guid://e231e15beff2309b8f87c30b2c105cc4d2399973)".

Arguments

const char * path - Path to be checked.

Return value

true if the given path has a valid GUID path format; otherwise, false.

bool isAssetPath ( const char * path ) const#

Returns a value indicating if the given path has a valid asset path format (e.g. asset://1.tga).

Arguments

const char * path - Path to be checked.

Return value

true if the given path has a valid asset path format; otherwise, false.

long long getMTime ( const char * path ) const#

Returns the time of the last modification of the given file.

NoticeCalling this method every frame in the main thread, especially for multiple files, may cause a performance hit. It is better to optimize such checks and move them to a separate thread.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

Time of the last file modification. If there is no such file, -1 will be returned.

long long getMTime ( const UGUID & guid ) const#

Returns the time of the last modification of the file with the specified GUID.

NoticeCalling this method every frame in the main thread, especially for multiple files, may cause a performance hit. It is better to optimize such checks and move them to a separate thread.

Arguments

const UGUID & guid - File GUID.

Return value

Time of the last file modification. If there is no such file, -1 will be returned.

bool loadGUIDs ( const char * path ) #

Loads file system GUIDs from the specified file.

Arguments

const char * path - Path to the file, where file system GUIDs are stored.

Return value

true if file system GUIDs are loaded successfully; otherwise, false.

bool saveGUIDs ( const char * path, bool binary = false ) const#

Saves all file system GUIDs to the specified file in the specified format (json or binary).

Arguments

const char * path - Path to the file, where file system GUIDs are to be stored.
bool binary - Binary file format flag. When the flag is set to true, the file system will save GUIDs to a binary file; otherwise, to a JSON file.

Return value

true if all file system GUIDs are saved successfully; otherwise, false.

UGUID generateGUID ( ) const#

Generates a new GUID.

Return value

New filesystem GUID if is was generated successfully; otherwise, an empty GUID.

bool setGUID ( const char * path, const UGUID & guid ) #

Sets the specified GUID for the given file.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.
const UGUID & guid - GUID to be set for the file.

Return value

true if the GUID is set successfully; otherwise, false.

UGUID getGUID ( const char * path ) const#

Returns the GUID (if it exists) for the given file.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

File GUID if it exists; otherwise, an empty GUID.

long long getFileSize ( const char * path ) const#

Returns the size of the specified file.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

File size in bytes.

long long getFileSize ( const UGUID & guid ) const#

Returns the size of the file with the specified GUID.

Arguments

const UGUID & guid - File GUID

Return value

File size in bytes.

String getModifier ( int num ) const#

Returns the name of the given modifier.

Arguments

int num - ID number of the modifier.

Return value

Modifier name.

void addModifier ( const char * name ) #

Registers a new modifier in the file system.

Arguments

const char * name - Modifier name.

void removeModifier ( const char * name ) #

Unregisters a given modifier in the file system.

Arguments

const char * name - Modifier name.

void clearModifiers ( ) #

Unregister all modifiers in the file system.

String guidToPath ( const UGUID & guid ) const#

Returns the path to the file with the specified GUID.

Arguments

const UGUID & guid - File GUID

Return value

File path. It can be a relative, absolute, network, or virtual path.

UGUID pathToGuid ( const char * path ) #

Returns the GUID of the file to which the path is specified.

Arguments

const char * path - File path. It can be a relative, absolute, network, or virtual path.
Notice
If you want to specify a path to an asset, you should use the asset path format (asset://). Otherwise, if you specify the regular path to the asset, it will be treated as the path to its runtime file (if any) from the .runtimes folder.

Return value

File GUID

Last update: 2024-12-13

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Unigine::FileSystem Class

In This Article:

Getting the Asset Filename#

See also#

功能列表:

FileSystem Class

Members

int getNumModifiers() const#

Return value

static Event<const UGUID &, const char *> getEventFileChanged() const#

Return value

static Event<const UGUID &, const char *> getEventFileRemoved() const#

Return value

static Event<const UGUID &, const char *> getEventFileAdded() const#

Return value

static Event<const Vector<FilePath> &> getEventFilesChanged() const#

Return value

static Event<const Vector<FilePath> &> getEventFilesRemoved() const#

Return value

static Event<const Vector<FilePath> &> getEventFilesAdded() const#

Return value

Ptr<FileSystemMount> getMount ( const char * path ) const#

Arguments

Return value

Ptr<FileSystemMount> getMount ( const UGUID & guid ) const#

Arguments

Return value

void getMounts ( Vector<Ptr<FileSystemMount>> & OUT_container ) const#

Arguments

Ptr<FileSystemMount> getRootMount ( ) const#

Return value

Ptr<FileSystemMount> createMount ( const char * absolute_path, const char * virtual_path, int access ) #

Arguments

Return value

Ptr<FileSystemMount> addMount ( const char * umount_path ) #

Arguments

Return value

bool saveMountFile ( const char * umount_path ) const#

Arguments

Return value

bool removeMount ( const char * path ) #

Arguments

Return value

void clearMounts ( ) #

bool loadPackage ( const char * path ) #

Arguments

Return value

bool loadPackage ( const char * path, const char * extension ) #

Arguments

Return value

bool removePackage ( const char * path ) #

Arguments

Return value

void getSupportedPackagesExtensions ( Vector<String> & OUT_extensions ) const#

Arguments

void getPackageVirtualFiles ( const char * path, Vector<String> & OUT_files ) const#

Arguments

void getPackageVirtualFiles ( const char * path, const char * extension, Vector<String> & OUT_files ) const#

Arguments

void preloadExternPackage ( Package * package ) #

Arguments

void preloadExternPackage ( const char * virtual_path, Package * package ) #

Arguments

void clearPreloadedExternPackages ( ) #

bool addExternPackage ( Package * package ) #

Arguments

Return value

bool addExternPackage ( const char * path, Package * package ) #

Arguments

Return value

void getVirtualFiles ( Vector<String> & OUT_files ) const#

Arguments

void getVirtualFiles ( Vector<UGUID> & OUT_files ) const#

Arguments

bool isVirtualFile ( const char * path ) const#

Arguments

Return value

bool isVirtualFile ( const UGUID & guid ) const#

Arguments

Return value