Refraction Class Reference

This class performs refraction computations, following literature from atmospheric optics and astronomy. More...

#include <RefractionExtinction.hpp>

List of all members.

Public Member Functions
void	forward (Vec3d &altAzPos) const
	Apply refraction.
void	backward (Vec3d &altAzPos) const
	Remove refraction from position ("reduce").
void	forward (Vec3f &altAzPos) const
	Apply refraction.
void	backward (Vec3f &altAzPos) const
	Remove refraction from position ("reduce").
void	combine (const Mat4d &m)
Mat4d	getApproximateLinearTransfo () const
StelProjector::ModelViewTranformP	clone () const
void	setPressure (float p_mbar)
	Set surface air pressure (mbars), influences refraction computation.
float	getPressure () const
void	setTemperature (float t_C)
	Set surface air temperature (degrees Celsius), influences refraction computation.
float	getTemperature () const
void	setPreTransfoMat (const Mat4d &m)
	Set the transformation matrices used to transform input vector to AltAz frame.
void	setPostTransfoMat (const Mat4d &m)

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Detailed Description

This class performs refraction computations, following literature from atmospheric optics and astronomy.

Refraction solutions can only be aproximate, given the turbulent, unpredictable real atmosphere. Typical horizons do not go down below -1, so strange effects (distortion) between -2 and -5 should be covered. Note that forward/backward are no absolute reverse operations! All the computations should be in effect (1) only if atmosphere effects are true (2) only for celestial objects, never for landscape images (3) only for terrestrial locations, not on Moon/Mars/Saturn etc

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Member Function Documentation

void Refraction::backward

(

Vec3f &

altAzPos

)

const [virtual]

Remove refraction from position ("reduce").

Parameters:

altAzPos

is the apparent star position vector, to be transformed into geometrical position. Note that forward/backward are no absolute reverse operations!

Implements StelProjector::ModelViewTranform.

void Refraction::backward

(

Vec3d &

altAzPos

)

const [virtual]

Remove refraction from position ("reduce").

Parameters:

altAzPos

is the apparent star position vector, to be transformed into geometrical position. Note that forward/backward are no absolute reverse operations!

Implements StelProjector::ModelViewTranform.

void Refraction::forward

(

Vec3f &

altAzPos

)

const [virtual]

Apply refraction.

Parameters:

altAzPos

is the geometrical star position vector, to be transformed into apparent position. Note that forward/backward are no absolute reverse operations!

Implements StelProjector::ModelViewTranform.

void Refraction::forward

(

Vec3d &

altAzPos

)

const [virtual]

Apply refraction.

Parameters:

altAzPos

is the geometrical star position vector, to be transformed into apparent position. Note that forward/backward are no absolute reverse operations!

Implements StelProjector::ModelViewTranform.

void Refraction::setPressure

(

float

p_mbar

)

Set surface air pressure (mbars), influences refraction computation.

void Refraction::setPreTransfoMat

(

const Mat4d &

m

)

Set the transformation matrices used to transform input vector to AltAz frame.

void Refraction::setTemperature

(

float

t_C

)

Set surface air temperature (degrees Celsius), influences refraction computation.