Compute and display the daylight sky color using OpenGL. More...

#include <Atmosphere.hpp>

Public Member Functions
void	computeColor (StelCore core, double JD, const Planet &currentPlanet, const Planet &sun, const Planet moon, const StelLocation &location, float temperature, float relativeHumidity, float extinctionCoefficient, bool noScatter)
	Compute sky brightness values and average luminance. More...

void	draw (StelCore *core)

void	update (double deltaTime)

void	setFadeDuration (float duration)
	Set fade in/out duration in seconds.

float	getFadeDuration () const
	Get fade in/out duration in seconds.

void	setFlagShow (bool b)
	Define whether to display atmosphere.

bool	getFlagShow () const
	Get whether atmosphere is displayed.

float	getRealDisplayIntensityFactor () const
	Get the actual atmosphere intensity due to eclipses + fader. More...

float	getFadeIntensity () const

float	getAverageLuminance () const
	Get the average luminance of the atmosphere in cd/m2 If atmosphere is off, the luminance equals the background starlight (0.001cd/m2). More...

void	setAverageLuminance (float overrideLum)
	override computable luminance. More...

void	setLightPollutionLuminance (float f)
	Set the light pollution luminance in cd/m^2.

float	getLightPollutionLuminance () const
	Get the light pollution luminance in cd/m^2.

Skylight *	getSkyLight (void)

Detailed Description

The sky brightness is computed with the SkyBright class, the color with the SkyLight. Don't use this class directly but use it through the LandscapeMgr.

Member Function Documentation

◆ computeColor()

void Atmosphere::computeColor	(	StelCore *	core,
		double	JD,
		const Planet &	currentPlanet,
		const Planet &	sun,
		const Planet *	moon,
		const StelLocation &	location,
		float	temperature,
		float	relativeHumidity,
		float	extinctionCoefficient,
		bool	noScatter
	)

Parameters

noScatter true to suppress the actual sky brightness modelling. This will keep refraction/extinction working for didactic reasons.

◆ getAverageLuminance()

float Atmosphere::getAverageLuminance ( ) const

inline

Otherwise it includes the (atmosphere + background starlight (0.0001cd/m2) * eclipse factor + light pollution.

Returns: the last computed average luminance of the atmosphere in cd/m2.

◆ getRealDisplayIntensityFactor()

float Atmosphere::getRealDisplayIntensityFactor ( ) const

inline

Returns: the display intensity ranging from 0 to 1

◆ setAverageLuminance()

void Atmosphere::setAverageLuminance ( float overrideLum )

This is for special operations only, e.g. for scripting of brightness-balanced image export. To return to auto-computed values, set any negative value at the end of the script.