OGRE: Ogre::Root Class Reference

| OGRE 14.5 Object-Oriented Graphics Rendering Engine

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Ogre::Root Class Reference
Core » General

The root class of the Ogre system. More...

`#include <OgreRoot.h>`

Inheritance diagram for Ogre::Root:
[legend]

## Public Types
typedef ConstMapIterator< MovableObjectFactoryMap > | MovableObjectFactoryIterator
typedef std::map< String, MovableObjectFactory * > | MovableObjectFactoryMap
typedef std::vector< Plugin * > | PluginInstanceList
typedef std::vector< DynLib * > | PluginLibList

## Public Member Functions
| Root (const String &pluginFileName="plugins.cfg", const String &configFileName="ogre.cfg", const String &logFileName="Ogre.log")
| Constructor.
| ~Root ()
uint32 | _allocateNextMovableObjectTypeFlag (void)
| Allocate the next MovableObject type flag.
bool | _fireFrameEnded ()
| Method for raising frame ended events.
bool | _fireFrameEnded (FrameEvent &evt)
| Method for raising frame ended events.
bool | _fireFrameRenderingQueued ()
| Method for raising frame rendering queued events.
bool | _fireFrameRenderingQueued (FrameEvent &evt)
| Method for raising frame rendering queued events.
bool | _fireFrameStarted ()
| Method for raising frame started events.
bool | _fireFrameStarted (FrameEvent &evt)
| Method for raising frame started events.
SceneManager * | _getCurrentSceneManager (void) const
| Returns the scene manager currently being used to render a frame.
void | _setCurrentSceneManager (SceneManager *sm)
| Sets the scene manager currently being used to render.
bool | _updateAllRenderTargets (FrameEvent &evt)
| Internal method used for updating all RenderTarget objects (windows, renderable textures etc) which are set to auto-update, with a custom time passed to the frameRenderingQueued events.
bool | _updateAllRenderTargets (void)
| Internal method used for updating all RenderTarget objects (windows, renderable textures etc) which are set to auto-update.
void | addFrameListener (FrameListener *newListener)
| Registers a FrameListener which will be called back every frame.
void | addMovableObjectFactory (MovableObjectFactory *fact, bool overrideExisting=false)
| Register a new MovableObjectFactory which will create new MovableObject instances of a particular type, as identified by the getType() method.
void | addRenderSystem (RenderSystem *newRend)
| Adds a new rendering subsystem to the list of available renderers.
void | addSceneManagerFactory (SceneManagerFactory *fact)
| Register a new SceneManagerFactory, a factory object for creating instances of specific SceneManagers.
void | clearEventTimes (void)
| Clears the history of all event times.
RenderWindow * | createRenderWindow (const RenderWindowDescription &desc)
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.
RenderWindow * | createRenderWindow (const String &name, unsigned int width, unsigned int height, bool fullScreen, const NameValuePairList *miscParams=0)
| Creates a new rendering window.
SceneManager * | createSceneManager ()
| create a default scene manager
SceneManager * | createSceneManager (const String &typeName, const String &instanceName=BLANKSTRING)
| Create a SceneManager instance of a given type.
SceneManager * | createSceneManager (uint16 typeMask, const String &instanceName=BLANKSTRING)
void | destroyRenderTarget (const String &name)
| Destroys the given named RenderTarget.
void | destroyRenderTarget (RenderTarget *target)
| Destroys the given RenderTarget.
void | destroySceneManager (SceneManager *sm)
| Destroy an instance of a SceneManager.
RenderTarget * | detachRenderTarget (const String &name)
| Detaches a named RenderTarget from the active render system and returns a pointer to it.
RenderTarget * | detachRenderTarget (RenderTarget *pWin)
| Detaches a RenderTarget from the active render system and returns a pointer to it.
bool | endRenderingQueued (void)
| Check for planned end of rendering.
RenderWindow * | getAutoCreatedWindow (void)
const RenderSystemList & | getAvailableRenderers (void)
| Retrieve a list of the available render systems.
Real | getDefaultMinPixelSize ()
| Get the default minimum pixel size for object to be rendered by.
Real | getFrameSmoothingPeriod (void) const
| Gets the period over which OGRE smooths out fluctuations in frame times.
const PluginInstanceList & | getInstalledPlugins () const
| Gets a read-only list of the currently installed plugins.
MeshManager * | getMeshManager (void)
| Retrieves a reference to the current MeshManager.
const MovableObjectFactoryMap & | getMovableObjectFactories () const
| Return an iterator over all the MovableObjectFactory instances currently registered.
MovableObjectFactory * | getMovableObjectFactory (const String &typeName)
| Get a MovableObjectFactory for the given type.
MovableObjectFactoryIterator | getMovableObjectFactoryIterator (void) const
unsigned long | getNextFrameNumber (void) const
| Gets the number of the next frame to be rendered.
bool | getRemoveRenderQueueStructuresOnClear () const
| Get whether the entire render queue structure should be emptied on clearing, or whether just the objects themselves should be cleared.
RenderSystem * | getRenderSystem (void)
| Retrieve a pointer to the currently selected render system.
RenderSystem * | getRenderSystemByName (const String &name)
| Retrieve a pointer to the render system by the given name.
RenderTarget * | getRenderTarget (const String &name)
| Retrieves a pointer to a named render target.
SceneManager * | getSceneManager (const String &instanceName) const
| Get an existing SceneManager instance that has already been created, identified by the instance name.
const SceneManagerInstanceMap & | getSceneManagers (void) const
| Get all the existing SceneManager instances.
const StringVector & | getSceneManagerTypes () const
| get all types of SceneManager available for construction
TextureManager * | getTextureManager (void)
| Retrieves a reference to the current TextureManager.
Timer * | getTimer (void)
| Gets a pointer to the central timer used for all OGRE timings.
WorkQueue * | getWorkQueue () const
| Get the WorkQueue for processing background tasks.
bool | hasMovableObjectFactory (const String &typeName) const
| Checks whether a factory is registered for a given MovableObject type.
bool | hasSceneManager (const String &instanceName) const
| Identify if a SceneManager instance already exists.
RenderWindow * | initialise (bool autoCreateWindow=false, const String &windowTitle="OGRE Render Window")
| Initialises the renderer.
void | installPlugin (Plugin *plugin)
| Install a new plugin.
bool | isBlendIndicesGpuRedundant () const
| Returns whether blend indices information needs to be passed to the GPU see setBlendIndicesGpuRedundant() for more information.
bool | isBlendWeightsGpuRedundant () const
| Returns whether blend weights information needs to be passed to the GPU see setBlendWeightsGpuRedundant() for more information.
bool | isInitialised (void) const
| Returns whether the system is initialised or not.
void | loadPlugin (const String &pluginName)
| Manually load a Plugin contained in a DLL / DSO.
void | queueEndRendering (bool state=true)
| Queues the end of rendering.
void | removeFrameListener (FrameListener *oldListener)
| Removes a FrameListener from the list of listening classes.
void | removeMovableObjectFactory (MovableObjectFactory *fact)
| Removes a previously registered MovableObjectFactory.
void | removeSceneManagerFactory (SceneManagerFactory *fact)
| Remove a SceneManagerFactory.
bool | renderOneFrame (Real timeSinceLastFrame)
| Updates all the render targets with custom frame time information.
bool | renderOneFrame (void)
| Updates all the render targets automatically.
bool | restoreConfig (void)
| Checks for saved video/sound/etc settings.
void | saveConfig (void)
| Saves the details of the current configuration.
void | setBlendIndicesGpuRedundant (bool redundant)
| Sets whether blend indices information needs to be passed to the GPU.
void | setBlendWeightsGpuRedundant (bool redundant)
| Sets whether blend weights information needs to be passed to the GPU.
void | setDefaultMinPixelSize (Real pixelSize)
| Set the default minimum pixel size for object to be rendered by.
void | setFrameSmoothingPeriod (Real period)
| Sets the period over which OGRE smooths out fluctuations in frame times.
void | setRemoveRenderQueueStructuresOnClear (bool r)
| Set whether the entire render queue structure should be emptied on clearing, or whether just the objects themselves should be cleared.
void | setRenderSystem (RenderSystem *system)
| Sets the rendering subsystem to be used.
void | setWorkQueue (WorkQueue *queue)
| Replace the current work queue with an alternative.
bool | showConfigDialog (ConfigDialog *dialog)
| Displays a dialog asking the user to choose system settings.
void | shutdown (void)
| Shuts down the system manually.
void | startRendering (void)
| Starts / restarts the automatic rendering cycle.
void | uninstallPlugin (Plugin *plugin)
| Uninstall an existing plugin.
void | unloadPlugin (const String &pluginName)
| Manually unloads a Plugin contained in a DLL / DSO.
void | useCustomRenderSystemCapabilities (RenderSystemCapabilities *capabilities)
| Requests active RenderSystem to use custom RenderSystemCapabilities.
Public Member Functions inherited from Ogre::Singleton< Root >
| ~Singleton (void)

## Static Public Member Functions
static void | convertColourValue (const ColourValue &colour, uint32 *pDest)
static DataStreamPtr | createFileStream (const String &filename, const String &groupName=ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, bool overwrite=false, const String &locationPattern=BLANKSTRING)
| Helper method to assist you in creating writeable file streams.
static Root & | getSingleton (void)
| Get the singleton instance.
static Root * | getSingletonPtr (void)
| Get the singleton instance.
static DataStreamPtr | openFileStream (const String &filename, const String &groupName=ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME)
| Helper method to assist you in accessing readable file streams.
Static Public Member Functions inherited from Ogre::Singleton< Root >
static Root & | getSingleton (void)
| Get the singleton instance.
static Root * | getSingletonPtr (void)
| Get the singleton instance.

## Detailed Description

The root class of the Ogre system.

The Ogre::Root class represents a starting point for the client application. From here, the application can gain access to the fundamentals of the system, namely the rendering systems available, management of saved configurations, logging, and access to other classes in the system. Acts as a hub from which all other objects may be reached. An instance of Root must be created before any other Ogre operations are called. Once an instance has been created, the same instance is accessible throughout the life of that object by using Root::getSingleton (as a reference) or Root::getSingletonPtr (as a pointer).

## Member Typedef Documentation

## ◆ MovableObjectFactoryMap

typedef std::map<String, MovableObjectFactory*> Ogre::Root::MovableObjectFactoryMap

## ◆ PluginLibList

typedef std::vector<DynLib*> Ogre::Root::PluginLibList

## ◆ PluginInstanceList

typedef std::vector<Plugin*> Ogre::Root::PluginInstanceList

## ◆ MovableObjectFactoryIterator

typedef ConstMapIterator<MovableObjectFactoryMap> Ogre::Root::MovableObjectFactoryIterator

## Constructor & Destructor Documentation

## ◆ Root()

Ogre::Root::Root | ( | const String & | pluginFileName = "plugins.cfg",
|  | const String & | configFileName = "ogre.cfg",
|  | const String & | logFileName = "Ogre.log" )

Constructor.

Parameters

  pluginFileName | The file that contains plugins information. May be left blank to ignore.
  configFileName | The file that contains the configuration to be loaded. Defaults to "ogre.cfg", may be left blank to load nothing.
  logFileName | The logfile to create, defaults to Ogre.log, may be left blank if you've already set up LogManager & Log yourself

Referenced by getSingleton(), and getSingletonPtr().

## ◆ ~Root()

Ogre::Root::~Root | ( |  | ) |

## Member Function Documentation

## ◆ saveConfig()

void Ogre::Root::saveConfig | ( | void |  | ) |

Saves the details of the current configuration.

Stores details of the current configuration so it may be restored later on.

## ◆ restoreConfig()

bool Ogre::Root::restoreConfig | ( | void |  | ) |

Checks for saved video/sound/etc settings.

This method checks to see if there is a valid saved configuration from a previous run. If there is, the state of the system will be restored to that configuration.

Returns
  If a valid configuration was found, true is returned.

  If there is no saved configuration, or if the system failed with the last config settings, false is returned.

## ◆ showConfigDialog()

bool Ogre::Root::showConfigDialog | ( | ConfigDialog * | dialog | ) |

Displays a dialog asking the user to choose system settings.

This method displays the default dialog allowing the user to choose the rendering system, video mode etc. If there is are any settings saved already, they will be restored automatically before displaying the dialogue. When the user accepts a group of settings, this will automatically call Root::setRenderSystem, RenderSystem::setConfigOption and Root::saveConfig with the user's choices. This is the easiest way to get the system configured.

Parameters

  dialog | ConfigDialog implementation to use. If NULL, the first available render system with the default options will be selected.

Returns
  If the user clicked 'Ok', true is returned.

  If they clicked 'Cancel' (in which case the app should strongly consider terminating), false is returned.

## ◆ addRenderSystem()

void Ogre::Root::addRenderSystem | ( | RenderSystem * | newRend | ) |

Adds a new rendering subsystem to the list of available renderers.

Intended for use by advanced users and plugin writers only! Calling this method with a pointer to a valid RenderSystem (subclass) adds a rendering API implementation to the list of available ones. Typical examples would be an OpenGL implementation and a Direct3D implementation.

Note
  This should usually be called from the dllStartPlugin() function of an extension plug-in.

References RenderSystem.

## ◆ getAvailableRenderers()

const RenderSystemList & Ogre::Root::getAvailableRenderers | ( | void |  | ) |

Retrieve a list of the available render systems.

Retrieves a pointer to the list of available renderers as a list of RenderSystem subclasses. Can be used to build a custom settings dialog.

## ◆ getRenderSystemByName()

RenderSystem * Ogre::Root::getRenderSystemByName | ( | const String & | name | ) |

Retrieve a pointer to the render system by the given name.

Parameters

  name | Name of the render system intend to retrieve.

Returns
  A pointer to the render system, NULL if no found.

References RenderSystem.

## ◆ setRenderSystem()

void Ogre::Root::setRenderSystem | ( | RenderSystem * | system | ) |

Sets the rendering subsystem to be used.

This method indicates to OGRE which rendering system is to be used (e.g. Direct3D, OpenGL etc). This is called automatically by the default config dialog, and when settings are restored from a previous configuration. If used manually it could be used to set the renderer from a custom settings dialog. Once this has been done, the renderer can be initialised using Root::initialise.

  This method is also called by render systems if they are initialised directly.

Parameters

  system | Pointer to the render system to use.

See also
  RenderSystem

References RenderSystem.

## ◆ getRenderSystem()

RenderSystem * Ogre::Root::getRenderSystem | ( | void |  | ) |

Retrieve a pointer to the currently selected render system.

References RenderSystem.

## ◆ initialise()

RenderWindow * Ogre::Root::initialise | ( | bool | autoCreateWindow = false,
|  | const String & | windowTitle = "OGRE Render Window" )

Initialises the renderer.

This method can only be called after a renderer has been selected with Root::setRenderSystem, and it will initialise the selected rendering system ready for use.

Parameters

  autoCreateWindow | If true, a rendering window will automatically be created (saving a call to Root::createRenderWindow). The window will be created based on the options currently set on the render system.
  windowTitle |

Returns
  A pointer to the automatically created window, if requested, otherwise NULL.

## ◆ isInitialised()

bool Ogre::Root::isInitialised | ( | void |  | ) | const
| inline

Returns whether the system is initialised or not.

## ◆ useCustomRenderSystemCapabilities()

void Ogre::Root::useCustomRenderSystemCapabilities | ( | RenderSystemCapabilities * | capabilities | ) |

Requests active RenderSystem to use custom RenderSystemCapabilities.

This is useful for testing how the RenderSystem would behave on a machine with less advanced GPUs. This method MUST be called before creating the first RenderWindow

## ◆ getRemoveRenderQueueStructuresOnClear()

bool Ogre::Root::getRemoveRenderQueueStructuresOnClear | ( |  | ) | const
| inline

Get whether the entire render queue structure should be emptied on clearing, or whether just the objects themselves should be cleared.

## ◆ setRemoveRenderQueueStructuresOnClear()

void Ogre::Root::setRemoveRenderQueueStructuresOnClear | ( | bool | r | ) |
| inline

Set whether the entire render queue structure should be emptied on clearing, or whether just the objects themselves should be cleared.

## ◆ addSceneManagerFactory()

void Ogre::Root::addSceneManagerFactory | ( | SceneManagerFactory * | fact | ) |

Register a new SceneManagerFactory, a factory object for creating instances of specific SceneManagers.

Plugins should call this to register as new SceneManager providers.

## ◆ removeSceneManagerFactory()

void Ogre::Root::removeSceneManagerFactory | ( | SceneManagerFactory * | fact | ) |

Remove a SceneManagerFactory.

## ◆ getSceneManagerTypes()

const StringVector & Ogre::Root::getSceneManagerTypes | ( |  | ) | const

get all types of SceneManager available for construction

## ◆ createSceneManager() [1/3]

SceneManager * Ogre::Root::createSceneManager | ( |  | ) |
| inline

create a default scene manager

References createSceneManager(), and Ogre::SMT_DEFAULT.

Referenced by createSceneManager(), and createSceneManager().

## ◆ createSceneManager() [2/3]

SceneManager * Ogre::Root::createSceneManager | ( | const String & | typeName,
|  | const String & | instanceName = BLANKSTRING )

Create a SceneManager instance of a given type.

You can use this method to create a SceneManager instance of a given specific type. You may know this type already, or you may have discovered it by looking at the results from getMetaDataIterator.

Note
  This method throws an exception if the named type is not found.

Parameters

  typeName | String identifying a unique SceneManager type
  instanceName | Optional name to given the new instance that is created. If you leave this blank, an auto name will be assigned.

References Ogre::BLANKSTRING.

## ◆ createSceneManager() [3/3]

SceneManager * Ogre::Root::createSceneManager | ( | uint16 | typeMask,
|  | const String & | instanceName = BLANKSTRING )
| inline

Deprecated
  do not use

References Ogre::BLANKSTRING, createSceneManager(), and Ogre::SMT_DEFAULT.

## ◆ destroySceneManager()

void Ogre::Root::destroySceneManager | ( | SceneManager * | sm | ) |

Destroy an instance of a SceneManager.

## ◆ getSceneManager()

SceneManager * Ogre::Root::getSceneManager | ( | const String & | instanceName | ) | const

Get an existing SceneManager instance that has already been created, identified by the instance name.

Parameters

  instanceName | The name of the instance to retrieve.

## ◆ hasSceneManager()

bool Ogre::Root::hasSceneManager | ( | const String & | instanceName | ) | const

Identify if a SceneManager instance already exists.

Parameters

  instanceName | The name of the instance to retrieve.

## ◆ getSceneManagers()

const SceneManagerInstanceMap & Ogre::Root::getSceneManagers | ( | void |  | ) | const

Get all the existing SceneManager instances.

## ◆ getTextureManager()

TextureManager * Ogre::Root::getTextureManager | ( | void |  | ) |

Retrieves a reference to the current TextureManager.

This performs the same function as TextureManager::getSingleton, but is provided for convenience particularly to scripting engines.

  Note that a TextureManager will NOT be available until the Ogre system has been initialised by selecting a RenderSystem, calling Root::initialise and a window having been created (this may have been done by initialise if required). This is because the exact runtime subclass which will be implementing the calls will differ depending on the rendering engine selected, and these typically require a window upon which to base texture format decisions.

## ◆ getMeshManager()

MeshManager * Ogre::Root::getMeshManager | ( | void |  | ) |

Retrieves a reference to the current MeshManager.

This performs the same function as MeshManager::getSingleton and is provided for convenience to scripting engines.

## ◆ addFrameListener()

void Ogre::Root::addFrameListener | ( | FrameListener * | newListener | ) |

Registers a FrameListener which will be called back every frame.

A FrameListener is a class which implements methods which will be called every frame.

  See the FrameListener class for more details on the specifics It is imperative that the instance passed to this method is not destroyed before either the rendering loop ends, or the class is removed from the listening list using removeFrameListener().

Note
  This method can only be called after Root::initialise has been called.

## ◆ removeFrameListener()

void Ogre::Root::removeFrameListener | ( | FrameListener * | oldListener | ) |

Removes a FrameListener from the list of listening classes.

## ◆ queueEndRendering()

void Ogre::Root::queueEndRendering | ( | bool | state = true | ) |

Queues the end of rendering.

This method will do nothing unless startRendering() has been called, in which case before the next frame is rendered the rendering loop will bail out.

## ◆ endRenderingQueued()

bool Ogre::Root::endRenderingQueued | ( | void |  | ) |

Check for planned end of rendering.

This method return true if queueEndRendering() was called before.

## ◆ startRendering()

void Ogre::Root::startRendering | ( | void |  | ) |

Starts / restarts the automatic rendering cycle.

This method begins the automatic rendering of the scene. It will NOT return until the rendering cycle is halted.

  During rendering, any FrameListener classes registered using addFrameListener will be called back for each frame that is to be rendered, These classes can tell OGRE to halt the rendering if required, which will cause this method to return.

Note
  Users of the OGRE library do not have to use this automatic rendering loop. It is there as a convenience and is most useful for high frame rate applications e.g. games. For applications that don't need to constantly refresh the rendering targets (e.g. an editor utility), it is better to manually refresh each render target only when required by calling RenderTarget::update, or if you want to run your own render loop you can update all targets on demand using Root::renderOneFrame.
  This frees up the CPU to do other things in between refreshes, since in this case frame rate is less important.
  This method can only be called after Root::initialise has been called.

## ◆ renderOneFrame() [1/2]

bool Ogre::Root::renderOneFrame | ( | void |  | ) |

Updates all the render targets automatically.

Raises frame events before and after.

Overview of the render cycle

## ◆ renderOneFrame() [2/2]

bool Ogre::Root::renderOneFrame | ( | Real | timeSinceLastFrame | ) |

Updates all the render targets with custom frame time information.

Updates all the render targets automatically and then returns, raising frame events before and after - all per-frame times are based on the time value you pass in.

## ◆ shutdown()

void Ogre::Root::shutdown | ( | void |  | ) |

Shuts down the system manually.

This is normally done by Ogre automatically so don't think you have to call this yourself. However this is here for convenience, especially for dealing with unexpected errors or for systems which need to shut down Ogre on demand.

## ◆ createFileStream()

DataStreamPtr Ogre::Root::createFileStream | ( | const String & | filename,
|  | const String & | groupName = ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,
|  | bool | overwrite = false,
|  | const String & | locationPattern = BLANKSTRING )
| static

Helper method to assist you in creating writeable file streams.

This is a high-level utility method which you can use to find a place to save a file more easily. If the filename you specify is either an absolute or relative filename (ie it includes path separators), then the file will be created in the normal filesystem using that specification. If it doesn't, then the method will look for a writeable resource location via ResourceGroupManager::createResource using the other params provided.

Parameters

  filename | The name of the file to create. If it includes path separators, the filesystem will be accessed direct. If no path separators are present the resource system is used, falling back on the raw filesystem after.
  groupName | The name of the group in which to create the file, if the resource system is used
  overwrite | If true, an existing file will be overwritten, if false an error will occur if the file already exists
  locationPattern | If the resource group contains multiple locations, then usually the file will be created in the first writable location. If you want to be more specific, you can include a location pattern here and only locations which match that pattern (as determined by StringUtil::match) will be considered candidates for creation.

References Ogre::BLANKSTRING, and Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME.

## ◆ openFileStream()

DataStreamPtr Ogre::Root::openFileStream | ( | const String & | filename,
|  | const String & | groupName = ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME )
| static

Helper method to assist you in accessing readable file streams.

This is a high-level utility method which you can use to find a place to open a file more easily. It checks the resource system first, and if that fails falls back on accessing the file system directly.

Parameters

  filename | The name of the file to open.
  groupName | The name of the group in which to create the file, if the resource system is used

References Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME.

## ◆ convertColourValue()

void Ogre::Root::convertColourValue | ( | const ColourValue & | colour,
|  | uint32 * | pDest )
| inlinestatic

Deprecated
  use ColourValue::getAsBYTE()

References Ogre::ColourValue::getAsBYTE().

## ◆ getAutoCreatedWindow()

RenderWindow * Ogre::Root::getAutoCreatedWindow | ( | void |  | ) |

Deprecated
  use createRenderWindow instead

## ◆ createRenderWindow() [1/2]

RenderWindow * Ogre::Root::createRenderWindow | ( | const String & | name,
|  | unsigned int | width,
|  | unsigned int | height,
|  | bool | fullScreen,
|  | const NameValuePairList * | miscParams = 0 )

Creates a new rendering window.

This method creates a new rendering window as specified by the paramteters. The rendering system could be responible for only a single window (e.g. in the case of a game), or could be in charge of multiple ones (in the case of a level editor). The option to create the window as a child of another is therefore given. This method will create an appropriate subclass of RenderWindow depending on the API and platform implementation.

  After creation, this window can be retrieved using getRenderTarget().

Parameters

  name | The name of the window. Used in other methods later like setRenderTarget and getRenderTarget.
  width | The width of the new window.
  height | The height of the new window.
  fullScreen | Specify true to make the window full screen without borders, title bar or menu bar.
  miscParams | A NameValuePairList describing the other parameters for the new rendering window. Options are case sensitive. Unrecognised parameters will be ignored silently. These values might be platform dependent, but these are present for all platforms unless indicated otherwise:

Key | Type / Values | Default | Description | Platform
--- | --- | --- | --- | ---
title | String | RenderTarget name | The title of the window that will appear in the title bar |
left | Positive integers | Centred | Screen x coordinate from left |
top | Positive integers | Centred | Screen y coordinate from left |
hidden | true, false | false | hide the created window |
FSAA | Positive integer (usually 0, 2, 4, 8, 16) | 0 | Full screen antialiasing factor |
gamma | true, false | false | Enable hardware conversion from linear colour space to gamma colour space on rendering to the window. |
vsync | true, false | false | Synchronize buffer swaps to monitor vsync, eliminating tearing at the expense of a fixed frame rate |
vsyncInterval | 1, 2, 3, 4 | 1 | If vsync is enabled, the minimum number of vertical blanks that should occur between renders. For example if vsync is enabled, the refresh rate is 60 and this is set to 2, then the frame rate will be locked at 30. |
Full Screen | true, false | false | Specify whether to create the window in full screen mode |
border | none, fixed, resize | resize | The type of window border (in windowed mode) | Windows, OSX
displayFrequency | Refresh rate in Hertz (e.g. 60, 75, 100) | Desktop vsync rate | Display frequency rate, for fullscreen mode |
externalWindowHandle | Win32: HWND as int Linux: X11 Window as ulong OSX: OgreGLView address as an integer. You can pass NSView or NSWindow too, but should perform OgreGLView callbacks into the Ogre manually iOS: UIWindow address as an integer Emscripten: canvas selector String ("#canvas") | 0 (none) | External window handle, for embedding the OGRE render in an existing window |
externalGLControl | true, false | false | Let the external window control OpenGL i.e. don't select a pixel format for the window, do not change v-sync and do not swap buffer. When set to true, the calling application is responsible of OpenGL initialization and buffer swapping. It should also create an OpenGL context for its own rendering, Ogre will create one for its use. Then the calling application must also enable Ogre OpenGL context before calling any Ogre function and restore its OpenGL context after these calls. | OpenGL
externalWlDisplay | wl_display address as an integer | 0 (none) | Wayland display connection | Linux
externalWlSurface | wl_surface address as an integer | 0 (none) | Wayland onscreen surface | Linux
currentGLContext | true, false | false | Use an externally created GL context. (Must be current) | OpenGL
currentEGLSurface | true, false | false | Use an externally created EGL surface. | Android
minColourBufferSize | Positive integer (usually 16, 32) | 16 | Min total colour buffer size. See EGL_BUFFER_SIZE | OpenGL
windowProc | WNDPROC | DefWindowProc | function that processes window messages | Win 32
colourDepth | 16, 32 | Desktop depth | Colour depth of the resulting rendering window; only applies if fullScreen | Win32
FSAAHint | RenderSystem specific. Currently enables EQAA/ CSAA mode on D3D: if you want 4f8x (8x CSAA), set FSAA=4 and this to "f8" | Blank | FSAA mode hint | D3D
outerDimensions | true, false | false | Whether the width/height is expressed as the size of the outer window, rather than the content area | Win32
monitorIndex |  | -1 |  | Win 32
monitorHandle |  | 0 (none) |  | Win 32 (OpenGL)
enableDoubleClick | true, false | false | Enable the window to keep track and transmit double click messages. | Win32
useNVPerfHUD | true, false | false | Enable the use of nVidia NVPerfHUD | D3D
depthBuffer | true, false | true | Use depth buffer | D3D
NSOpenGLCPSurfaceOrder | -1 or 1 | 1 | NSOpenGLCPSurfaceOrder | OSX
contentScalingFactor | Positive Float | The default content scaling factor of the screen | On IOS specifies the CAEAGLLayer content scaling factor. This can be useful to limit the resolution of the OpenGL ES backing store. For example, the iPhone 4's native resolution is 960 x 640. Windows are always 320 x 480, if you would like to limit the display to 720 x 480, specify 1.5 as the scaling factor. | OSX, iOS, Android
externalViewHandle | UIView pointer as an integer | 0 | External view handle, for rendering OGRE render in an existing view | iOS
externalViewControllerHandle | UIViewController pointer as an integer | 0 | External view controller handle, for embedding OGRE in an existing view controller | iOS
externalSharegroup | EAGLSharegroup pointer as an integer | 0 | External sharegroup, used to shared GL resources between contexts | iOS
CSAA | Positive integer (usually 0, 2, 4, 8, 16) | 0 | Coverage sampling factor | Android
maxColourBufferSize | Positive integer (usually 16, 32) | 32 | Max EGL_BUFFER_SIZE | Android
maxStencilBufferSize | Positive integer (usually 0, 8) | 0 | EGL_STENCIL_SIZE | Android
maxDepthBufferSize | Positive integer (usually 0, 16, 24) | 16 | EGL_DEPTH_SIZE | Android

Referenced by createRenderWindow().

## ◆ createRenderWindow() [2/2]

RenderWindow * Ogre::Root::createRenderWindow | ( | const RenderWindowDescription & | desc | ) |
| inline

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

References createRenderWindow(), Ogre::RenderWindowDescription::height, Ogre::RenderWindowDescription::miscParams, Ogre::RenderWindowDescription::name, Ogre::RenderWindowDescription::useFullScreen, and Ogre::RenderWindowDescription::width.

## ◆ detachRenderTarget() [1/2]

RenderTarget * Ogre::Root::detachRenderTarget | ( | RenderTarget * | pWin | ) |

Detaches a RenderTarget from the active render system and returns a pointer to it.

Note
  If the render target cannot be found, NULL is returned.

## ◆ detachRenderTarget() [2/2]

RenderTarget * Ogre::Root::detachRenderTarget | ( | const String & | name | ) |

Detaches a named RenderTarget from the active render system and returns a pointer to it.

Note
  If the render target cannot be found, NULL is returned.

## ◆ destroyRenderTarget() [1/2]

void Ogre::Root::destroyRenderTarget | ( | RenderTarget * | target | ) |

Destroys the given RenderTarget.

## ◆ destroyRenderTarget() [2/2]

void Ogre::Root::destroyRenderTarget | ( | const String & | name | ) |

Destroys the given named RenderTarget.

## ◆ getRenderTarget()

RenderTarget * Ogre::Root::getRenderTarget | ( | const String & | name | ) |

Retrieves a pointer to a named render target.

## ◆ loadPlugin()

void Ogre::Root::loadPlugin | ( | const String & | pluginName | ) |

Manually load a Plugin contained in a DLL / DSO.

Plugins embedded in DLLs can be loaded at startup using the plugin configuration file specified when you create Root. This method allows you to load plugin DLLs directly in code. The DLL in question is expected to implement a dllStartPlugin method which instantiates a Plugin subclass and calls Root::installPlugin. It should also implement dllStopPlugin (see Root::unloadPlugin)

Parameters

  pluginName | Name of the plugin library to load

## ◆ unloadPlugin()

void Ogre::Root::unloadPlugin | ( | const String & | pluginName | ) |

Manually unloads a Plugin contained in a DLL / DSO.

Plugin DLLs are unloaded at shutdown automatically. This method allows you to unload plugins in code, but make sure their dependencies are decoupled first. This method will call the dllStopPlugin method defined in the DLL, which in turn should call Root::uninstallPlugin.

Parameters

  pluginName | Name of the plugin library to unload

## ◆ installPlugin()

void Ogre::Root::installPlugin | ( | Plugin * | plugin | ) |

Install a new plugin.

This installs a new extension to OGRE. The plugin itself may be loaded from a DLL / DSO, or it might be statically linked into your own application. Either way, something has to call this method to get it registered and functioning. You should only call this method directly if your plugin is not in a DLL that could otherwise be loaded with loadPlugin, since the DLL function dllStartPlugin should call this method when the DLL is loaded.

## ◆ uninstallPlugin()

void Ogre::Root::uninstallPlugin | ( | Plugin * | plugin | ) |

Uninstall an existing plugin.

This uninstalls an extension to OGRE. Plugins are automatically uninstalled at shutdown but this lets you remove them early. If the plugin was loaded from a DLL / DSO you should call unloadPlugin which should result in this method getting called anyway (if the DLL is well behaved).

## ◆ getInstalledPlugins()

const PluginInstanceList & Ogre::Root::getInstalledPlugins | ( |  | ) | const
| inline

Gets a read-only list of the currently installed plugins.

## ◆ getTimer()

Timer * Ogre::Root::getTimer | ( | void |  | ) |

Gets a pointer to the central timer used for all OGRE timings.

## ◆ _fireFrameStarted() [1/2]

bool Ogre::Root::_fireFrameStarted | ( | FrameEvent & | evt | ) |

Method for raising frame started events.

This method is only for internal use when you use OGRE's inbuilt rendering loop (Root::startRendering). However, if you run your own rendering loop then you should call this method to ensure that FrameListener objects are notified of frame events; processes like texture animation and particle systems rely on this.

  Calling this method also increments the frame number, which is important for keeping some elements of the engine up to date.

Note
  This method takes an event object as a parameter, so you can specify the times yourself. If you are happy for OGRE to automatically calculate the frame time for you, then call the other version of this method with no parameters.

Parameters

  evt | Event object which includes all the timing information which you have calculated for yourself

Returns
  False if one or more frame listeners elected that the rendering loop should be terminated, true otherwise.

## ◆ _fireFrameRenderingQueued() [1/2]

bool Ogre::Root::_fireFrameRenderingQueued | ( | FrameEvent & | evt | ) |

Method for raising frame rendering queued events.

This method is only for internal use when you use OGRE's inbuilt rendering loop (Root::startRendering). However, if you run your own rendering loop then you should call this method too, to ensure that all state is updated correctly. You should call it after the windows have been updated but before the buffers are swapped, or if you are not separating the update and buffer swap, then after the update just before _fireFrameEnded.

## ◆ _fireFrameEnded() [1/2]

bool Ogre::Root::_fireFrameEnded | ( | FrameEvent & | evt | ) |

Method for raising frame ended events.

This method is only for internal use when you use OGRE's inbuilt rendering loop (Root::startRendering). However, if you run your own rendering loop then you should call this method to ensure that FrameListener objects are notified of frame events; processes like texture animation and particle systems rely on this.

Note
  This method takes an event object as a parameter, so you can specify the times yourself. If you are happy for OGRE to automatically calculate the frame time for you, then call the other version of this method with no parameters.

Parameters

  evt | Event object which includes all the timing information which you have calculated for yourself

Returns
  False if one or more frame listeners elected that the rendering loop should be terminated, true otherwise.

## ◆ _fireFrameStarted() [2/2]

bool Ogre::Root::_fireFrameStarted | ( |  | ) |

Method for raising frame started events.

This method is only for internal use when you use OGRE's inbuilt rendering loop (Root::startRendering). However, if you run your own rendering loop then you should call this method to ensure that FrameListener objects are notified of frame events; processes like texture animation and particle systems rely on this.

  Calling this method also increments the frame number, which is important for keeping some elements of the engine up to date.

Note
  This method calculates the frame timing information for you based on the elapsed time. If you want to specify elapsed times yourself you should call the other version of this method which takes event details as a parameter.

Returns
  False if one or more frame listeners elected that the rendering loop should be terminated, true otherwise.

## ◆ _fireFrameRenderingQueued() [2/2]

bool Ogre::Root::_fireFrameRenderingQueued | ( |  | ) |

Method for raising frame rendering queued events.

This method is only for internal use when you use OGRE's inbuilt rendering loop (Root::startRendering). However, if you run your own rendering loop then you you may want to call this method too, although nothing in OGRE relies on this particular event. Really if you're running your own rendering loop at this level of detail then you can get the same effect as doing your updates in a frameRenderingQueued callback by just calling RenderWindow::update with the 'swapBuffers' option set to false.

## ◆ _fireFrameEnded() [2/2]

bool Ogre::Root::_fireFrameEnded | ( |  | ) |

Method for raising frame ended events.

This method is only for internal use when you use OGRE's inbuilt rendering loop (Root::startRendering). However, if you run your own rendering loop then you should call this method to ensure that FrameListener objects are notified of frame events; processes like texture animation and particle systems rely on this.

Note
  This method calculates the frame timing information for you based on the elapsed time. If you want to specify elapsed times yourself you should call the other version of this method which takes event details as a parameter.

Returns
  False if one or more frame listeners elected that the rendering loop should be terminated, true otherwise.

## ◆ getNextFrameNumber()

unsigned long Ogre::Root::getNextFrameNumber | ( | void |  | ) | const
| inline

Gets the number of the next frame to be rendered.

Note that this is 'next frame' rather than 'current frame' because it indicates the frame number that current changes made to the scene will take effect. It is incremented after all rendering commands for the current frame have been queued, thus reflecting that if you start performing changes then, you will actually see them in the next frame.

## ◆ _getCurrentSceneManager()

SceneManager * Ogre::Root::_getCurrentSceneManager | ( | void |  | ) | const
| inline

Returns the scene manager currently being used to render a frame.

This is only intended for internal use; it is only valid during the rendering of a frame.

## ◆ _setCurrentSceneManager()

void Ogre::Root::_setCurrentSceneManager | ( | SceneManager * | sm | ) |
| inline

Sets the scene manager currently being used to render.

This is only intended for internal use.

## ◆ _updateAllRenderTargets() [1/2]

bool Ogre::Root::_updateAllRenderTargets | ( | void |  | ) |

Internal method used for updating all RenderTarget objects (windows, renderable textures etc) which are set to auto-update.

You don't need to use this method if you're using Ogre's own internal rendering loop (Root::startRendering). If you're running your own loop you may wish to call it to update all the render targets which are set to auto update (RenderTarget::setAutoUpdated). You can also update individual RenderTarget instances using their own update() method.

Returns
  false if a FrameListener indicated it wishes to exit the render loop

## ◆ _updateAllRenderTargets() [2/2]

bool Ogre::Root::_updateAllRenderTargets | ( | FrameEvent & | evt | ) |

Internal method used for updating all RenderTarget objects (windows, renderable textures etc) which are set to auto-update, with a custom time passed to the frameRenderingQueued events.

You don't need to use this method if you're using Ogre's own internal rendering loop (Root::startRendering). If you're running your own loop you may wish to call it to update all the render targets which are set to auto update (RenderTarget::setAutoUpdated). You can also update individual RenderTarget instances using their own update() method.

Returns
  false if a FrameListener indicated it wishes to exit the render loop

## ◆ getSingleton()

Root & Ogre::Root::getSingleton | ( | void |  | ) |
| static

Get the singleton instance.

References Root().

## ◆ getSingletonPtr()

Root * Ogre::Root::getSingletonPtr | ( | void |  | ) |
| static

Get the singleton instance.

References Root().

## ◆ clearEventTimes()

void Ogre::Root::clearEventTimes | ( | void |  | ) |

Clears the history of all event times.

OGRE stores a history of the last few event times in order to smooth out any inaccuracies and temporary fluctuations. However, if you pause or don't render for a little while this can cause a lurch, so if you're resuming rendering after a break, call this method to reset the stored times

## ◆ setFrameSmoothingPeriod()

void Ogre::Root::setFrameSmoothingPeriod | ( | Real | period | ) |
| inline

Sets the period over which OGRE smooths out fluctuations in frame times.

OGRE by default gives you the raw frame time, but can optionally smooths it out over several frames, in order to reduce the noticeable effect of occasional hiccups in framerate. These smoothed values are passed back as parameters to FrameListener calls.

  This method allow you to tweak the smoothing period, and is expressed in seconds. Setting it to 0 will result in completely unsmoothed frame times (the default).

## ◆ getFrameSmoothingPeriod()

Real Ogre::Root::getFrameSmoothingPeriod | ( | void |  | ) | const
| inline

Gets the period over which OGRE smooths out fluctuations in frame times.

## ◆ addMovableObjectFactory()

void Ogre::Root::addMovableObjectFactory | ( | MovableObjectFactory * | fact,
|  | bool | overrideExisting = false )

Register a new MovableObjectFactory which will create new MovableObject instances of a particular type, as identified by the getType() method.

Plugin creators can create subclasses of MovableObjectFactory which construct custom subclasses of MovableObject for insertion in the scene. This is the primary way that plugins can make custom objects available.

Parameters

  fact | Pointer to the factory instance
  overrideExisting | Set this to true to override any existing factories which are registered for the same type. You should only change this if you are very sure you know what you're doing.

## ◆ removeMovableObjectFactory()

void Ogre::Root::removeMovableObjectFactory | ( | MovableObjectFactory * | fact | ) |

Removes a previously registered MovableObjectFactory.

All instances of objects created by this factory will be destroyed before removing the factory (by calling back the factories 'destroyInstance' method). The plugin writer is responsible for actually destroying the factory.

## ◆ hasMovableObjectFactory()

bool Ogre::Root::hasMovableObjectFactory | ( | const String & | typeName | ) | const

Checks whether a factory is registered for a given MovableObject type.

## ◆ getMovableObjectFactory()

MovableObjectFactory * Ogre::Root::getMovableObjectFactory | ( | const String & | typeName | ) |

Get a MovableObjectFactory for the given type.

## ◆ _allocateNextMovableObjectTypeFlag()

uint32 Ogre::Root::_allocateNextMovableObjectTypeFlag | ( | void |  | ) |

Allocate the next MovableObject type flag.

This is done automatically if MovableObjectFactory::requestTypeFlags returns true; don't call this manually unless you're sure you need to.

## ◆ getMovableObjectFactories()

const MovableObjectFactoryMap & Ogre::Root::getMovableObjectFactories | ( |  | ) | const
| inline

Return an iterator over all the MovableObjectFactory instances currently registered.

## ◆ getMovableObjectFactoryIterator()

MovableObjectFactoryIterator Ogre::Root::getMovableObjectFactoryIterator | ( | void |  | ) | const

Deprecated
  use getMovableObjectFactories

## ◆ getWorkQueue()

WorkQueue * Ogre::Root::getWorkQueue | ( |  | ) | const
| inline

Get the WorkQueue for processing background tasks.

You are free to add new requests and handlers to this queue to process your custom background tasks using the shared thread pool. However, you must remember to assign yourself a new channel through which to process your tasks.

## ◆ setWorkQueue()

void Ogre::Root::setWorkQueue | ( | WorkQueue * | queue | ) |

Replace the current work queue with an alternative.

You can use this method to replace the internal implementation of WorkQueue with your own, e.g. to externalise the processing of background events. Doing so will delete the existing queue and replace it with this one.

Parameters

  queue | The new WorkQueue instance. Root will delete this work queue at shutdown, so do not destroy it yourself.

## ◆ setBlendIndicesGpuRedundant()

void Ogre::Root::setBlendIndicesGpuRedundant | ( | bool | redundant | ) |
| inline

Sets whether blend indices information needs to be passed to the GPU.

When entities use software animation they remove blend information such as indices and weights from the vertex buffers sent to the graphic card. This function can be used to limit which information is removed.

Parameters

  redundant | Set to true to remove blend indices information.

## ◆ isBlendIndicesGpuRedundant()

bool Ogre::Root::isBlendIndicesGpuRedundant | ( |  | ) | const
| inline

Returns whether blend indices information needs to be passed to the GPU see setBlendIndicesGpuRedundant() for more information.

## ◆ setBlendWeightsGpuRedundant()

void Ogre::Root::setBlendWeightsGpuRedundant | ( | bool | redundant | ) |
| inline

Sets whether blend weights information needs to be passed to the GPU.

When entities use software animation they remove blend information such as indices and weights from the vertex buffers sent to the graphic card. This function can be used to limit which information is removed.

Parameters

  redundant | Set to true to remove blend weights information.

## ◆ isBlendWeightsGpuRedundant()

bool Ogre::Root::isBlendWeightsGpuRedundant | ( |  | ) | const
| inline

Returns whether blend weights information needs to be passed to the GPU see setBlendWeightsGpuRedundant() for more information.

## ◆ setDefaultMinPixelSize()

void Ogre::Root::setDefaultMinPixelSize | ( | Real | pixelSize | ) |
| inline

Set the default minimum pixel size for object to be rendered by.

Note
  To use this feature see Camera::setUseMinPixelSize()

## ◆ getDefaultMinPixelSize()

Real Ogre::Root::getDefaultMinPixelSize | ( |  | ) |
| inline

Get the default minimum pixel size for object to be rendered by.

The documentation for this class was generated from the following file:

- OgreRoot.h