; sky_on.sfa - John French, Abrams Planetarium, October 2002
; This file draws the night sky.

0:00 buttons 2,1 play ./sky_off
     buttons 2,1 label 'Sky   Off'
     date today 22:00
     ; Also change home.sfa, back_au.sfa and homenorth.sfa  
     attitude terrestrial here
     goto object earth
     show date
     declare global stars
     declare global milkyway
     declare global M31
     declare global M42
     declare global MagClouds
     adjust M31 definition picture ad:m31
     adjust M42 definition picture ad:m42
     adjust MagClouds definition picture /dsuser/demos/stariddata/magclouds
     adjust stars brightness 0
     adjust milkyway brightness 0
     adjust M31 brightness 0
     adjust M42 brightness 0
     adjust MagClouds brightness 0
     adjust milkyway focus 0
     adjust M31 focus 0
     adjust M42 focus 0
     adjust MagClouds focus 0
     draw stellar stars
     draw galactic milkyway
     draw galactic M31
     draw galactic M42
     draw galactic MagClouds
     adjust stars brightness 100 /until +2
     adjust milkyway brightness 55 /until +2
     adjust M31 brightness 90 /until +2
     adjust M42 brightness 90 /until +2
     adjust MagClouds brightness 65 /until +2
     play /dsuser/french/buttons/solar_on
     end