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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


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.


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 funtion 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)


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