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 ()
	Constructor.
void	setDate (int year, int month, float moonPhase)
	Set the sky date to use for atmosphere computation.
void	setLocation (float latitude, float altitude, float temperature=15.f, float relativeHumidity=40.f)
	Set the position parameters to use for atmosphere computation.
void	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().
float	getLuminance (float cosDistMoon, float cosDistSun, float cosDistZenith) const
	Compute the luminance at the given position.

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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

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)

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)