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EXTINCTION branch:
Introduces changes necessary for extinction effects.
Status: Partial solution, needs help.
Contributor: Georg.Zotti@univie.ac.at
All changes are donated to the Stellarium project for distribution under opensource licenses like GNU.
2011-Oct: A new attempt in Extinction:
=========================================
StelObject and derived classes: getVMagnitude() has new optional arg: withExtinction.
This should be set to true only for determining magnitude for drawing (draw()) and also for textual info (getInfoString()),
not e.g. for selection (getSelectPriority()).
It will also only change the result if atmosphere rendering is ON.
StelSkyDrawer::drawPointSource
StelObject::getVMagnitude
Satellite::getVMagnitude, ::getInfoString
Supernova::getVMagnitude, ::getInfoString
Quasar::getVMagnitude, ::getInfoString
Satellite::getVMagnitude
Planet::getVMagnitude, ::getInfoString
Comet::getVMagnitude, ::getInfoString
MinorPlanet::getVMagnitude, ::getInfoString
Nebula::getVMagnitude, ::getInfoString
StarWrapper::getInfoString
I currently have no solution for extended objects! Therefore ...
TODO: Milky Way, Nebula figures, Constellations??
================================================================================
TODO, but maybe in yet another branch: See implementation in abandoned refraction branch!
CHANGES IN LANDSCAPE HANDLING:
1) Moved config.ini:[stars].init_bortle_scale to [landscape] section
2) Added optional settings to landscape.ini files:
landscape.ini:[location].light_pollution (<1: no change; 1..9: Bortle; >9-->9);
landscape.ini:[location].display_fog: -1=no change, 0=off, 1=on
landscape.ini:[location].atmospheric_extinction_coefficient (mag/airmass; -1=no change)
landscape.ini:[location].atmospheric_temperature (C; -1000=no change)
landscape.ini:[location].atmospheric_pressure (mbar; -1=auto, <-1 no change)
LandscapeMgr forwards those settings to the respective recipients.
TODO: make GUI aware of changed values (how?).
CHANGES IN ASTR.COMPUTATIONS
planetsephems/sideral_time.[hc]: added get_mean_ecliptical_obliquity(double JDE),
changed correct ecliptic in nutation computation.
StelUtil::ctRadec2Ecl(): coordinate transformation RA/dec to ecliptical with given ecl. obliquity.
Planet::getInfoString(): added ecliptical positions for planets if observed from earth.
This helped detect A BUG, apparently ecliptical obliquity does not change, currently.
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