LandscapePolygonal Class Reference

This uses the list of (usually measured) horizon altitudes to define the horizon. More...

#include <Landscape.hpp>

Public Member Functions
	LandscapePolygonal (float radius=1.f)
void	load (const QSettings &landscapeIni, const QString &landscapeId) override
	Load landscape. More...
void	draw (StelCore *core, bool onlyPolygon) override
	Draw the landscape. If onlyPolygon, only draw the landscape polygon, if one is defined. If no polygon is defined, the.
float	getOpacity (Vec3d azalt) const override
	Find opacity in a certain direction. More...
void	setGroundColor (const Vec3f &color)
Public Member Functions inherited from Landscape
	Landscape (float _radius=2.f)
virtual void	initGL ()
unsigned int	getMemorySize () const
	Return approximate memory footprint in bytes (required for cache cost estimate in LandscapeMgr) The returned value is only approximate, content of QStrings and other small containers like the horizon polygon are not put in in detail. More...
void	update (double deltaTime)
void	setBrightness (const double b, const double pollutionBrightness=0.0)
	Set the brightness of the landscape plus brightness of optional add-on night lightscape. More...
void	setTint (Vec3f color)
	Set a tint to render the landscape. Useful for low-sun scenes.
double	getBrightness () const
	Returns the current brightness level.
double	getLightscapeBrightness () const
	Returns the lightscape brightness.
double	getTargetLightscapeBrightness () const
	Returns the lightscape brightness modulated with the fader's target state (i.e. binary on/off)
double	getEffectiveLightscapeBrightness () const
	Gets the currently effective lightscape brightness (modulated by the fader)
void	setFlagShow (const bool b)
	Set whether landscape is displayed (does not concern fog)
bool	getFlagShow ()
	Get whether landscape is displayed (does not concern fog)
float	getEffectiveLandFadeValue ()
	Returns the currently effective land fade value.
void	setFlagShowFog (const bool b)
	Set whether fog is displayed.
bool	getFlagShowFog ()
	Get whether fog is displayed.
QString	getName () const
	Get landscape name.
QString	getAuthorName () const
	Get landscape author name.
QString	getDescription () const
	Get landscape description.
QString	getId () const
	Get landscape id. This is the landscape directory name, used for cache handling.
const StelLocation &	getLocation () const
	Return the associated location (may be empty!)
bool	hasLocation () const
	Return if the location is valid (a valid location has a valid planetName!)
QVariant	getDefaultLightPollutionLuminance () const
	Return default light pollution luminance in cd/m², if present.
int	getDefaultFogSetting () const
	Return default fog setting (0/1) or -1 (no change)
double	getDefaultAtmosphericExtinction () const
	Return default atmosperic extinction [mag/airmass], or -1 (no change)
double	getDefaultAtmosphericTemperature () const
	Return configured atmospheric temperature [degrees Celsius], for refraction computation, or -1000 for "unknown/no change".
double	getDefaultAtmosphericPressure () const
	Return configured atmospheric pressure [mbar], for refraction computation. More...
double	getLandscapeMinimalBrightness () const
	Return minimal brightness for landscape returns -1 to signal "standard conditions" (use default value from config.ini)
void	setZRotation (float d)
	Set an additional z-axis (azimuth) rotation after landscape has been loaded. More...
bool	getIsFullyVisible () const
	Get whether the landscape is currently fully visible (i.e. opaque).
double	getSinMinAltitudeLimit () const
	Get the sine of the limiting altitude (can be used to short-cut drawing below horizon, like star fields). There is no set here, value is only from landscape.ini.
void	loadLabels (const QString &landscapeId)
	Load descriptive labels from optional file gazetteer.LANG.utf8.
bool	hasLandscapePolygon () const

Additional Inherited Members
Public Types inherited from Landscape
enum	horizonListMode {   invalid =-1 , azDeg_altDeg = 0 , azDeg_zdDeg = 1 , azRad_altRad = 2 ,   azRad_zdRad = 3 , azGrad_altGrad = 4 , azGrad_zdGrad = 5 }
	The list of azimuths (counted from True North towards East) and altitudes can come in various formats. We read the first two elements, which can be of formats: More...
Static Public Member Functions inherited from Landscape
static void	setFlagShowIllumination (const bool b)
	Set whether illumination is displayed.
static bool	getFlagShowIllumination ()
	Get whether illumination is displayed.
static void	setTransparency (const double f)
Protected Member Functions inherited from Landscape
void	setupCurrentVAO ()
void	bindVAO ()
void	releaseVAO ()
void	loadCommon (const QSettings &landscapeIni, const QString &landscapeId)
	Load attributes common to all landscapes. More...
void	drawLabels (StelCore *core, StelPainter *painter)
	Draw optional labels on the landscape.
void	createPolygonalHorizon (const QString &lineFileName, const float polyAngleRotateZ=0.0f, const QString &listMode="azDeg_altDeg")
	Create a StelSphericalPolygon that describes a measured horizon line. More...
void	drawHorizonLine (StelCore *core, StelPainter &painter)
Static Protected Member Functions inherited from Landscape
static const QString	getTexturePath (const QString &basename, const QString &landscapeId)
	search for a texture in landscape directory, else global textures directory More...
Protected Attributes inherited from Landscape
std::unique_ptr< QOpenGLVertexArrayObject >	vao
std::unique_ptr< QOpenGLBuffer >	vbo
StelProjectorP	prevProjector
std::unique_ptr< QOpenGLShaderProgram >	renderProgram
double	radius
QString	name
QString	author
	Read from landscape.ini:[landscape]name.
QString	description
	Read from landscape.ini:[landscape]author.
QString	id
	Read from landscape.ini:[landscape]description.
float	minBrightness
	Set during load. Required for consistent caching.
float	landscapeBrightness
	Read from landscape.ini:[landscape]minimal_brightness. Allows minimum visibility that cannot be underpowered.
Vec3f	landscapeTint
	brightness [0..1] to draw the landscape. Computed by the LandscapeMgr.
float	lightScapeBrightness
	color tint to draw the landscape (daylight texture only). Nice for sunrise/sunset.
bool	validLandscape
	can be used to draw nightscape texture (e.g. city light pollution), if available. Computed by the LandscapeMgr.
LinearFader	landFader
	was a landscape loaded properly?
LinearFader	fogFader
	Used to slowly fade in/out landscape painting.
unsigned int	rows
	Used to slowly fade in/out landscape feature labels.
unsigned int	cols
	horizontal rows. May be given in landscape.ini:[landscape]tesselate_rows. More indicates higher accuracy, but is slower.
float	angleRotateZ
	vertical columns. May be given in landscape.ini:[landscape]tesselate_cols. More indicates higher accuracy, but is slower.
float	angleRotateZOffset
	[radians] if pano does not have its left border in the east, rotate in azimuth. Configured in landscape.ini[landscape]angle_rotatez (or decor_angle_rotatez for old_style landscapes)
double	sinMinAltitudeLimit
	[radians] This is a rotation changeable at runtime via setZRotation (called by LandscapeMgr::setZRotation). More...
StelLocation	location
QVariant	defaultLightPollutionLuminance
	OPTIONAL. If present, can be used to set location. More...
int	defaultFogSetting
double	defaultExtinctionCoefficient
	May be given in landscape.ini:[location]display_fog: -1(no change), 0(off), 1(on). Default: -1.
double	defaultTemperature
	May be given in landscape.ini:[location]atmospheric_extinction_coefficient. Default -1 (no change).
double	defaultPressure
	[Celsius] May be given in landscape.ini:[location]atmospheric_temperature. default: -1000.0 (no change)
SphericalRegionP	horizonPolygon
	[mbar] May be given in landscape.ini:[location]atmospheric_pressure. Default -1.0 (compute from [location]/altitude), use -2 to indicate "no change".
QList< LandscapeLabel >	landscapeLabels
	[0...5] used to draw the horizon polygon, if defined. Set 0 to switch off.
unsigned int	memorySize
	Rotation angle for landscape labels, degrees. Useful for landscapes with many labels. More...
bool	multisamplingEnabled_
bool	initialized = false
Static Protected Attributes inherited from Landscape
static LinearFader	illumFader
	Used to slowly fade in/out fog painting.
static LinearFader	labelFader
	Used to slowly fade in/out illumination painting.
static double	landscapeTransparency
	Minimal altitude of landscape cover. Can be used to construct bounding caps, so that e.g. no stars are drawn below this altitude. Default -0.035, i.e. sin(-2 degrees).
static Vec3f	horizonPolygonLineColor
	Optional element describing the horizon line. More...
static int	horizonPolygonLineThickness
	for all horizon types, the horizonPolygon line, if specified, will be drawn in this color More...
static int	fontSize
static Vec3f	labelColor
	Used for landscape labels (optionally indicating landscape features)
static int	labelAngle
	Color for the landscape labels.

Detailed Description

This uses the list of (usually measured) horizon altitudes to define the horizon.

Define it with the following names in landscape.ini:

Parameters

landscape/ground_color	use this color below horizon
landscape/polygonal_horizon_list	filename containing azimuths/altitudes, compatible with Carte du Ciel.
landscape/polygonal_angle_rotatez	offset for the polygonal measurement (different from landscape/angle_rotatez in photo panos, often photo and line are not aligned.)

Member Function Documentation

getOpacity()

float LandscapePolygonal::getOpacity ( Vec3d  azalt ) const

overridevirtual

Find opacity in a certain direction.

(New in V0.13 series) can be used to find sunrise or visibility questions on the real-world landscape horizon. Default implementation indicates the horizon equals math horizon.

Reimplemented from Landscape.

load()

void LandscapePolygonal::load ( const QSettings &  landscapeIni, const QString &  landscapeId  )

overridevirtual

Load landscape.

Parameters

landscapeIni	A reference to an existing QSettings object which describes the landscape
landscapeId	The name of the directory for the landscape files (e.g. "ocean")

Implements Landscape.