Stellarium  0.17.0
Public Slots | Signals | Public Member Functions | Properties
LandscapeMgr Class Reference

Manages all the rendering at the level of the observer's surroundings. More...

#include <LandscapeMgr.hpp>

Public Slots

float getLuminance () const
 Return the global landscape luminance [0..1], for being used e.g for setting eye adaptation. More...
 
float getAtmosphereAverageLuminance () const
 return average luminance [cd/m^2] of atmosphere. Expect 10 at sunset, 6400 in daylight, >0 in dark night.
 
void setAtmosphereAverageLuminance (const float overrideLuminance)
 Override autocomputed value and set average luminance [cd/m^2] of atmosphere. More...
 
QMap< QString, QString > getNameToDirMap () const
 Return a map of landscape names to landscape IDs (directory names).
 
QStringList getAllLandscapeNames () const
 Retrieve a list of the names of all the available landscapes in the file search path sub-directories of the landscape area. More...
 
QStringList getAllLandscapeIDs () const
 Retrieve a list of the identifiers of all the available landscapes in the file search path sub-directories of the landscape area. More...
 
QStringList getUserLandscapeIDs () const
 Retrieve a list of the identifiers of all user-installed landscapes. More...
 
const QString getCurrentLandscapeID () const
 Get the current landscape ID.
 
bool setCurrentLandscapeID (const QString &id, const double changeLocationDuration=1.0)
 Change the current landscape to the landscape with the ID specified. More...
 
QString getCurrentLandscapeName () const
 Get the current landscape name.
 
bool setCurrentLandscapeName (const QString &name, const double changeLocationDuration=1.0)
 Change the current landscape to the landscape with the name specified. More...
 
float getCurrentLandscapeBrightness (const bool light=false) const
 Get the current landscape or lightscape brightness (0..1) More...
 
bool precacheLandscape (const QString &id, const bool replace=true)
 Preload a landscape into cache. More...
 
bool removeCachedLandscape (const QString &id)
 Remove a landscape from the cache of landscapes. More...
 
void setCacheSize (int mb)
 Set size of the landscape cache, in MB. More...
 
int getCacheSize () const
 Retrieve total size of cache (MB).
 
int getCacheFilledSize () const
 Retrieve sum of currently used memory in cache (MB, approximate)
 
int getCacheCount () const
 Return number of landscapes already in the cache.
 
LandscapegetCurrentLandscape () const
 Get the current landscape object.
 
const QString getDefaultLandscapeID () const
 Get the default landscape ID.
 
bool setDefaultLandscapeID (const QString &id)
 Change the default landscape to the landscape with the ID specified. More...
 
QString getCurrentLandscapeHtmlDescription () const
 Return a pseudo HTML formatted string with all informations on the current landscape.
 
QString getDescription () const
 Return a pseudo HTML formatted string with information from description or ini file.
 
bool getFlagLandscape () const
 Get flag for displaying Landscape.
 
void setFlagLandscape (const bool displayed)
 Set flag for displaying Landscape.
 
bool getIsLandscapeFullyVisible () const
 Get whether the landscape is currently visible. If true, objects below landscape's limiting altitude limit can be omitted.
 
float getLandscapeSinMinAltitudeLimit () const
 Get the sine of current landscape's minimal altitude. Useful to construct bounding caps.
 
bool getFlagFog () const
 Get flag for displaying Fog.
 
void setFlagFog (const bool displayed)
 Set flag for displaying Fog.
 
bool getFlagIllumination () const
 Get flag for displaying illumination layer.
 
void setFlagIllumination (const bool on)
 Set flag for displaying illumination layer.
 
bool getFlagLabels () const
 Get flag for displaying landscape labels.
 
void setFlagLabels (const bool on)
 Set flag for displaying landscape labels.
 
bool getFlagLandscapeSetsLocation () const
 Return the value of the flag determining if a change of landscape will update the observer location.
 
void setFlagLandscapeSetsLocation (bool b)
 Set the value of the flag determining if a change of landscape will update the observer location.
 
bool getFlagLandscapeUseMinimalBrightness () const
 Return the value of the flag determining if a minimal brightness should be used to keep landscape visible.
 
void setFlagLandscapeUseMinimalBrightness (bool b)
 Set the value of the flag determining if a minimal brightness should be used to keep landscape visible.
 
bool getFlagLandscapeSetsMinimalBrightness () const
 Return the value of the flag determining if the minimal brightness should be taken from landscape.ini.
 
void setFlagLandscapeSetsMinimalBrightness (bool b)
 Sets the value of the flag determining if the minimal brightness should be taken from landscape.ini.
 
double getDefaultMinimalBrightness () const
 Return the minimal brightness value of the landscape.
 
void setDefaultMinimalBrightness (const double b)
 Set the minimal brightness value of the landscape.
 
void setFlagUseLightPollutionFromDatabase (const bool usage)
 Sets the value of the flag usage light pollution (and bortle index) from locations database.
 
bool getFlagUseLightPollutionFromDatabase () const
 Return the value of flag usage light pollution (and bortle index) from locations database.
 
bool getFlagCardinalsPoints () const
 Get flag for displaying Cardinals Points.
 
void setFlagCardinalsPoints (const bool displayed)
 Set flag for displaying Cardinals Points.
 
Vec3f getColorCardinalPoints () const
 Get Cardinals Points color.
 
void setColorCardinalPoints (const Vec3f &v)
 Set Cardinals Points color.
 
bool getFlagAtmosphere () const
 Get flag for displaying Atmosphere.
 
void setFlagAtmosphere (const bool displayed)
 Set flag for displaying Atmosphere.
 
float getAtmosphereFadeDuration () const
 Get atmosphere fade duration in s.
 
void setAtmosphereFadeDuration (const float f)
 Set atmosphere fade duration in s.
 
void setZRotation (const float d)
 Set the rotation of the landscape about the z-axis. More...
 
QString installLandscapeFromArchive (QString pathToSourceArchive, const bool display=false, const bool forAllUsers=false)
 Install a landscape from a ZIP archive. More...
 
bool removeLandscape (const QString landscapeID)
 This function removes a landscape from the user data directory. More...
 
QString loadLandscapeName (const QString landscapeID)
 This function reads a landscape's name from its configuration file. More...
 
quint64 loadLandscapeSize (const QString landscapeID) const
 This function calculates and returns a landscape's disc size in bytes. More...
 
bool getFlagLandscapeAutoSelection () const
 Get flag for autoselect of landscapes for planets.
 
void setFlagLandscapeAutoSelection (bool enableAutoSelect)
 Set flag for autoselect of landscapes for planets.
 
bool getFlagAtmosphereAutoEnable () const
 Get flag for auto-enable of atmospheres for planets.
 
void setFlagAtmosphereAutoEnable (bool b)
 Set flag for auto-enable atmosphere for planets with atmospheres in location window.
 
float getLandscapeOpacity (Vec3d azalt) const
 Forward opacity query to current landscape. More...
 
float getLandscapeOpacity (Vec3f azalt) const
 
float getLandscapeOpacity (float azimuth, float altitude) const
 Forward opacity query to current landscape. More...
 

Signals

void atmosphereDisplayedChanged (const bool displayed)
 
void cardinalsPointsDisplayedChanged (const bool displayed)
 
void cardinalsPointsColorChanged (const Vec3f &newColor) const
 
void fogDisplayedChanged (const bool displayed)
 
void landscapeDisplayedChanged (const bool displayed)
 
void illuminationDisplayedChanged (const bool displayed)
 
void labelsDisplayedChanged (const bool displayed)
 
void flagUseLightPollutionFromDatabaseChanged (const bool usage)
 
void flagLandscapeAutoSelectionChanged (const bool value)
 
void flagLandscapeSetsLocationChanged (const bool value)
 
void flagLandscapeUseMinimalBrightnessChanged (const bool value)
 
void flagLandscapeSetsMinimalBrightnessChanged (const bool value)
 
void defaultMinimalBrightnessChanged (const double value)
 
void setFlagAtmosphereAutoEnableChanged (const bool enabled)
 
void defaultLandscapeChanged (const QString &id)
 Emitted whenever the default landscape is changed. More...
 
void landscapesChanged ()
 Emitted when a landscape has been installed or un-installed. More...
 
void errorUnableToOpen (QString path)
 Emitted when installLandscapeFromArchive() can't read from, write to or create a file or a directory. More...
 
void errorNotArchive ()
 Emitted when the file passed to installLandscapeFromArchive() is not a ZIP archive or does not contain a valid landscape. More...
 
void errorNotUnique (QString nameOrID)
 Emitted when installLandscapeFromArchive() tries to install a landscape with the same name or identifier as an already installed one. More...
 
void errorRemoveManually (QString path)
 Emitted when removeLandscape() is unable to remove all the files of a landscape. More...
 
void currentLandscapeChanged (QString currentLandscapeID, QString currentLandscapeName)
 Emitted when the current landscape was changed. More...
 

Public Member Functions

virtual void init ()
 Initialize the LandscapeManager class. More...
 
virtual void draw (StelCore *core)
 Draw the landscape graphics, cardinal points and atmosphere.
 
virtual void update (double deltaTime)
 Update time-dependent state. More...
 
virtual double getCallOrder (StelModuleActionName actionName) const
 Get the order in which this module will draw its objects relative to other modules.
 
LandscapecreateFromFile (const QString &landscapeFile, const QString &landscapeId)
 Create a new landscape from the files which describe it. More...
 
- Public Member Functions inherited from StelModule
virtual void deinit ()
 Called before the module will be delete, and before the openGL context is suppressed. More...
 
virtual QString getModuleVersion () const
 Get the version of the module, default is stellarium main version.
 
virtual QString getAuthorName () const
 Get the name of the module author.
 
virtual QString getAuthorEmail () const
 Get the email adress of the module author.
 
virtual void handleMouseClicks (class QMouseEvent *)
 Handle mouse clicks. More...
 
virtual void handleMouseWheel (class QWheelEvent *)
 Handle mouse wheel. More...
 
virtual bool handleMouseMoves (int x, int y, Qt::MouseButtons b)
 Handle mouse moves. More...
 
virtual void handleKeys (class QKeyEvent *e)
 Handle key events. More...
 
virtual bool handlePinch (qreal scale, bool started)
 Handle pinch gesture events. More...
 
virtual bool configureGui (bool show=true)
 Detect or show the configuration GUI elements for the module. More...
 

Properties

bool atmosphereDisplayed
 
bool cardinalsPointsDisplayed
 
Vec3f cardinalsPointsColor
 
bool fogDisplayed
 
bool landscapeDisplayed
 
bool illuminationDisplayed
 
bool labelsDisplayed
 
bool flagUseLightPollutionFromDatabase
 
bool flagLandscapeAutoSelection
 
bool flagLandscapeSetsLocation
 
bool flagLandscapeUseMinimalBrightness
 Indicate use of the default minimal brightness value specified in config.ini.
 
bool flagLandscapeSetsMinimalBrightness
 Indicate use of the minimal brightness value specified in the current landscape.ini, if present.
 
double defaultMinimalBrightness
 A minimal brightness value to keep landscape visible.
 
bool flagAtmosphereAutoEnabling
 Indicate auto-enable atmosphere for planets with atmospheres in location window.
 
QString currentLandscapeID
 The ID of the currently loaded landscape.
 
QStringList allLandscapeNames
 
QString currentLandscapeName
 
QString currentLandscapeHtmlDescription
 
QString defaultLandscapeID
 The ID of the default landscape.
 

Additional Inherited Members

- Public Types inherited from StelModule
enum  StelModuleSelectAction { AddToSelection, ReplaceSelection, RemoveFromSelection }
 Enum used when selecting objects to define whether to add to, replace, or remove from the existing selection list. More...
 
enum  StelModuleActionName {
  ActionDraw, ActionUpdate, ActionHandleMouseClicks, ActionHandleMouseMoves,
  ActionHandleKeys
}
 Define the possible action for which an order is defined. More...
 
- Protected Member Functions inherited from StelModule
class StelActionaddAction (const QString &id, const QString &groupId, const QString &text, QObject *target, const char *slot, const QString &shortcut="", const QString &altShortcut="")
 convenience methods to add an action (call to slot) to the StelActionMgr object. More...
 
class StelActionaddAction (const QString &id, const QString &groupId, const QString &text, const char *slot, const QString &shortcut="", const QString &altShortcut="")
 convenience methods to add an action (call to own slot) to the StelActionMgr object. More...
 

Detailed Description

This includes landscape textures, fog, atmosphere and cardinal points. I decided to put all these elements together in a single class because they are inherently linked, especially when we start moving the observer in altitude.

Note
The Bortle scale index setting was removed from this class, because it was duplicated from StelSkyDrawer, complicating code that changes it. It is now only in StelSkyDrawer and can be accessed with getBortleScaleIndex and setBortleScaleIndex . Slots setAtmosphereBortleLightPollution and getAtmosphereBortleLightPollution in this class have been removed/made private. If script access is desired, use StelMainScriptAPI::get /setBortleScaleIndex

Member Function Documentation

Landscape* LandscapeMgr::createFromFile ( const QString &  landscapeFile,
const QString &  landscapeId 
)

Reads a landscape.ini file which is passed as the first parameter, determines the landscape type, and creates a new object for the landscape of the proper type. The load member is then called, passing both parameters.

Parameters
landscapeFileThis is the path to a landscape.ini file.
landscapeIdThis is the landscape ID, which is also the name of the directory in which the files (textures and so on) for the landscape reside.
Returns
A pointer to the newly created landscape object.
void LandscapeMgr::currentLandscapeChanged ( QString  currentLandscapeID,
QString  currentLandscapeName 
)
signal
Parameters
currentLandscapeIDthe ID of the new landscape
currentLandscapeNamethe name of the new landscape
void LandscapeMgr::defaultLandscapeChanged ( const QString &  id)
signal
Parameters
idthe landscape id of the new default landscape
void LandscapeMgr::errorNotArchive ( )
signal

(A way of moving the need for translatable error messages to the GUI.)

void LandscapeMgr::errorNotUnique ( QString  nameOrID)
signal

(A way of moving the need for translatable error messages to the GUI.)

Parameters
nameOrIDthe name or the identifier of the landscape
void LandscapeMgr::errorRemoveManually ( QString  path)
signal

(A way of moving the need for translatable error messages to the GUI.)

Parameters
paththe path to the landscape's directory
void LandscapeMgr::errorUnableToOpen ( QString  path)
signal

(A way of moving the need for translatable error messages to the GUI.)

Parameters
pathpath to the file or directory
QStringList LandscapeMgr::getAllLandscapeIDs ( ) const
slot
Returns
the identifiers of the landscapes, which are the names of the directories containing the landscapes' files
QStringList LandscapeMgr::getAllLandscapeNames ( ) const
slot
Returns
the names of the landscapes, which are the values of the name parameter in the landscape.ini files
float LandscapeMgr::getCurrentLandscapeBrightness ( const bool  light = false) const
inlineslot
Parameters
lighttrue to retrieve the light layer brightness value.
float LandscapeMgr::getLandscapeOpacity ( Vec3d  azalt) const
inlineslot
Parameters
azaltdirection of view line to sample in azaltimuth coordinates.
float LandscapeMgr::getLandscapeOpacity ( float  azimuth,
float  altitude 
) const
inlineslot
Parameters
azimuthin degrees
altitudein degrees
float LandscapeMgr::getLuminance ( ) const
slot

It returns 1 if atmosphere drawing is on and no eclipse underway, 0 if atmosphere is switched off. The actual brightness is of no concern here. You may use getAtmosphereAverageLuminance() for this.

QStringList LandscapeMgr::getUserLandscapeIDs ( ) const
slot

Effectively, this returns the results of getAllLandscapeIDs() without the landscapes specified in the #packagedLandscapeIDs list.

virtual void LandscapeMgr::init ( )
virtual

Operations performed:

  • Load the default landscape as specified in the application configuration
  • Set up landscape-related display flags from ini parser object

Implements StelModule.

QString LandscapeMgr::installLandscapeFromArchive ( QString  pathToSourceArchive,
const bool  display = false,
const bool  forAllUsers = false 
)
slot

This function searches for a file named "landscape.ini" in the root directory of the archive. If it is not found there, the function searches inside the topmost sub-directories (if any), but no deeper. If a landscape configuration file is found:

  • if a "landscapes" directory does not exist in the user data directory, it is created;
  • inside it, a sub-directory is created with the landscape identifier for a name;
  • all files in the archive directory that contains the "landscape.ini" file are extracted to the new sub-directory of "landscapes";
  • all sub-directories of that archive directory will be skipped along with any other files or directories in the archive.

The landscape identifier is either:

  • the name of the folder in the archive that contains "landscape.ini",
  • or the first 65 (or less) characters of the archive name, if the "landscape.ini" file is in the nameless root directory of the archive.

The landscape identifier must be unique.

Parameters
pathToSourceArchivepath to the source archive file.
displayIf true, the landscape will be set to be the current landscape after installation.
forAllUsersIf true, this function will try to install the landscape in a way that meakes it is available to all users of this computer. May require running Stellarium as an administrator (root) on some Windows or *nix systems. (NOT IMPLEMENTED!)
Returns
the installed landscape's identifier, or an empty string on failure.
void LandscapeMgr::landscapesChanged ( )
signal

For example, it is used to update the list of landscapes in the Sky and viewing options window (the ViewDialog class)

QString LandscapeMgr::loadLandscapeName ( const QString  landscapeID)
slot
Parameters
landscapeIDan installed landscape's identifier (the folder name)
Returns
an empty string if there is no such landscape or some other error occurs
quint64 LandscapeMgr::loadLandscapeSize ( const QString  landscapeID) const
slot

It adds up the sizes of all files in the landscape's folder. It assumes that there are no sub-directories. (There shouldn't be any anyway.)

Parameters
landscapeIDan installed landscape's identifier (the folder name)
bool LandscapeMgr::precacheLandscape ( const QString &  id,
const bool  replace = true 
)
slot
Parameters
idthe ID of a landscape
replacetrue if existing landscape entry should be replaced (useful during development to reload after edit)
Returns
false if landscape could not be found, or if it already existed in cache and replace was false.
bool LandscapeMgr::removeCachedLandscape ( const QString &  id)
slot
Parameters
idthe ID of a landscape
Returns
false if landscape could not be found
bool LandscapeMgr::removeLandscape ( const QString  landscapeID)
slot

It tries to recursively delete all files in the landscape directory and then remove it from the list of available landscapes. If the function encounters any file that can't be deleted it aborts the operation (previously deleted files are not restored). Landscapes that were packaged with Stellarium can't be removed, thanks to the #packagedLandscapeIDs list.

Parameters
landscapeIDan installed landscape's identifier (the folder name)
void LandscapeMgr::setAtmosphereAverageLuminance ( const float  overrideLuminance)
slot

This is around 10 at sunset, 6400 in daylight, >0 in dark night. Usually there is no need to call this, the luminance is properly computed. This is a function which can be useful in rare cases, e.g. in scripts when you want to create images of adjacent sky regions with the same brightness setting, or for creation of a virtual camera which can deliberately show over- or underexposure. For these cases, it is advisable to first center the brightest luminary (sun or moon), call getAtmosphereAverageLuminance() and then set this value explicitly to freeze it during image export. To unfreeze, call this again with any negative value.

void LandscapeMgr::setCacheSize ( int  mb)
inlineslot

Default size is 100MB, or configured as [landscape/cache_size_mb] from config.ini. The landscape sizes returned in Landscape::getMemorySize() are only approximate, but include image and texture sizes. A big landscape may well take 150MB or more. On a 32bit system, keep this rather small. On 64bit with 16GB RAM and no other tasks, 4GB is no problem. Modern GPUs may have 4 or even 8GB of dedicated texture memory. Most of this may be filled with landscape textures. Example: a museum installation with 20 large (16384x2048) old_stype landscapes can require up to 3.5GB. Allow 4GB cache, and the system will never have to load a landscape during the show when all have been preloaded.

bool LandscapeMgr::setCurrentLandscapeID ( const QString &  id,
const double  changeLocationDuration = 1.0 
)
slot

Emits currentLandscapeChanged() if the landscape changed (true returned)

Parameters
idthe ID of the new landscape
changeLocationDurationthe duration of the transition animation
Returns
false if the new landscape could not be set (e.g. no landscape of that ID was found).
bool LandscapeMgr::setCurrentLandscapeName ( const QString &  name,
const double  changeLocationDuration = 1.0 
)
slot

Emits currentLandscapeChanged() if the landscape changed (true returned)

Parameters
namethe name of the new landscape, as found in the landscape:name key of the landscape.ini file.
changeLocationDurationthe duration of the transition animation
bool LandscapeMgr::setDefaultLandscapeID ( const QString &  id)
slot
Parameters
idthe ID of the landscape to use by default
Returns
false if the new landscape could not be set (e.g. no landscape of that ID was found). True on success.
void LandscapeMgr::setZRotation ( const float  d)
slot

This is intended for special uses such as when the landscape consists of a vehicle which might change orientation over time (e.g. a ship).

Parameters
dthe rotation angle in degrees as an offset from the originally loaded value.
virtual void LandscapeMgr::update ( double  deltaTime)
virtual

Includes:

  • Landscape, atmosphere and cardinal point on/off fading.
  • Atmophere colour calculation based on location, position of sun and moon.
  • updates adaptation luminescence based on visible bright objects.
  • Landscape and lightscape brightness computations based on sun position and whether atmosphere is on or off.

Implements StelModule.