This uses a single panorama image in spherical (equirectangular) projection. More...

#include <Landscape.hpp>

Public Member Functions
	LandscapeSpherical (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
	Sample landscape texture for transparency/opacity. More...

void	create (const QString name, const QString &maptex, const QString &_maptexFog="", const QString &_maptexIllum="", const float _angleRotateZ=0.0f, const float _mapTexTop=90.0f, const float _mapTexBottom=-90.0f, const float _fogTexTop=90.0f, const float _fogTexBottom=-90.0f, const float _illumTexTop=90.0f, const float _illumTexBottom=-90.0f, const Vec3f _bottomCapColor=Vec3f(-1.0f, 0.0f, 0.0f))
	create a spherical landscape from basic parameters (no ini file needed). More...

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 () const
	Get whether landscape is displayed (does not concern fog)

float	getEffectiveLandFadeValue () const
	Returns the currently effective land fade value.

void	setFlagShowFog (const bool b)
	Set whether fog is displayed.

bool	getFlagShowFog () const
	Get whether fog is displayed.

void	setFlagShowIllumination (const bool b)
	Set whether illumination is displayed.

bool	getFlagShowIllumination () const
	Get whether illumination is displayed.

void	setFlagShowLabels (const bool b)
	Set whether labels are displayed.

bool	getFlagShowLabels () const
	Get whether labels are displayed.

void	setLabelFontSize (const int size)
	Change font and fontsize for landscape labels.

int	getLabelFontSize ()
	Get fontsize for landscape labels.

Vec3f	getLabelColor () const
	Get color for landscape labels.

void	setLabelColor (const Vec3f &c)
	Set color for landscape labels.

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	setTransparency (const double f)

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...

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.

LinearFader	illumFader
	Used to slowly fade in/out fog painting.

LinearFader	labelFader
	Used to slowly fade in/out illumination 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...

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).

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".

Vec3f	horizonPolygonLineColor
	Optional element describing the horizon line. More...

QList< LandscapeLabel >	landscapeLabels
	for all horizon types, the horizonPolygon line, if specified, will be drawn in this color More...

int	fontSize

Vec3f	labelColor
	Used for landscape labels (optionally indicating landscape features)

unsigned int	memorySize
	Color for the landscape labels. More...

bool	multisamplingEnabled_

bool	initialized = false

Detailed Description

This uses a single panorama image in spherical (equirectangular) projection.

A complete image is rectangular with the horizon forming a horizontal line centered vertically, and vertical altitude angles linearly mapped in image height. Since 0.13 and Qt5, large images of 8192x4096 pixels are available, but they still may not work on every hardware. If

Parameters

angleRotateZ==0,the left/right image border is due east. It is possible to remove empty top or bottom parts of the textures (main texture: only top part should meaningfully be cut away!) The textures should still be power-of-two, so maybe 8192x1024 for the fog, or 8192x2048 for the light pollution. (It's OK to stretch the textures. They just have to fit, geometrically!) TODO: Allow a horizontal split for 2 or even 4 parts, i.e. super-large, super-accurate panos.

Member Function Documentation

◆ create()

void LandscapeSpherical::create	(	const QString	name,
		const QString &	maptex,
		const QString &	_maptexFog = `""`,
		const QString &	_maptexIllum = `""`,
		const float	_angleRotateZ = `0.0f`,
		const float	_mapTexTop = `90.0f`,
		const float	_mapTexBottom = `-90.0f`,
		const float	_fogTexTop = `90.0f`,
		const float	_fogTexBottom = `-90.0f`,
		const float	_illumTexTop = `90.0f`,
		const float	_illumTexBottom = `-90.0f`,
		const Vec3f	_bottomCapColor = `Vec3f(-1.0f, 0.0f, 0.0f)`
	)

create a spherical landscape from basic parameters (no ini file needed).

Parameters

name	Landscape name
maptex	the equirectangular texture
maptexIllum	the equirectangular texture that is overlaid in the night (streetlights, skyglow, ...)
angleRotateZ	azimuth rotation angle, degrees [0]
_mapTexTop	altitude angle of top edge of texture, degrees [90]
_mapTexBottom	altitude angle of bottom edge of texture, degrees [-90]
_fogTexTop	altitude angle of top edge of fog texture, degrees [90]
_fogTexBottom	altitude angle of bottom edge of fog texture, degrees [-90]
_illumTexTop	altitude angle of top edge of light pollution texture, degrees [90]
_illumTexBottom	altitude angle of bottom edge of light pollution texture, degrees [-90]
_bottomCapColor	RGB triplet for closing the hole around the nadir, if any. A color value of (-1/0/0) signals "no cap"

◆ getOpacity()

float LandscapeSpherical::getOpacity ( Vec3d azalt ) const

overridevirtual

Sample landscape texture for transparency/opacity.

May be used for visibility, sunrise etc.

Parameters

azalt normalized direction in alt-az frame

Return values

alpha (0=fully transparent, 1=fully opaque. Trees, leaves, glass etc may have intermediate values.)

Reimplemented from Landscape.

◆ load()

void LandscapeSpherical::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.

Public Member Functions

Additional Inherited Members

Detailed Description

Member Function Documentation

◆ create()

◆ getOpacity()

◆ load()