Skybright Class Reference

Compute the luminance of the sky according to some parameters like sun moon position or time or altitude etc. More...

#include <Skybright.hpp>

List of all members.

Public Member Functions
	Skybright ()
void	setDate (int year, int month, float moonPhase)
void	setLocation (float latitude, float altitude, float temperature=15.f, float relativeHumidity=40.f)
void	setSunMoon (float cosDistMoonZenith, float cosDistSunZenith)
float	getLuminance (float cosDistMoon, float cosDistSun, float cosDistZenith) const

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Detailed Description

Compute the luminance of the sky according to some parameters like sun moon position or time or altitude etc.

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Constructor & Destructor Documentation

Skybright::Skybright

(

)

Constructor.

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Member Function Documentation

void Skybright::setDate	(	int	year,
		int	month,
		float	moonPhase
	)

Set the sky date to use for atmosphere computation.

Parameters:

	year	the year in YYYY format
	month	the month: 1=Jan, 12=Dec
	moonPhase	the moon phase in radian 0=Full Moon, PI/2=First Quadrant/Last Quadran, PI=No Moon

void Skybright::setLocation	(	float	latitude,
		float	altitude,
		float	temperature = 15.f,
		float	relativeHumidity = 40.f
	)

Set the position parameters to use for atmosphere computation.

Parameters:

	latitude	observer latitude in radian
	altitude	observer altitude in m
	temperature	temperature in deg. C
	relativeHumidity	air humidity in %

void Skybright::setSunMoon	(	float	cosDistMoonZenith,
		float	cosDistSunZenith
	)

Set the moon and sun zenith angular distance (cosin given) and precompute what can be This function has to be called once before any call to getLuminance().

Parameters:

	cosDistMoonZenith	cos(angular distance between moon and zenith)
	cosDistSunZenith	cos(angular distance between sun and zenith)

float Skybright::getLuminance	(	float	cosDistMoon,
		float	cosDistSun,
		float	cosDistZenith
	)			const

Compute the luminance at the given position.

Parameters:

	cosDistMoon	cos(angular distance between moon and the position)
	cosDistSun	cos(angular distance between sun and the position)
	cosDistZenith	cos(angular distance between zenith and the position)