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UPDATES.TXT
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CyberSky 3.2 Shareware Version           September 28, 2000


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UPDATES
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Changes introduced since the release of CyberSky 3.0
include:

CYBERSKY 3.2 (SEPTEMBER 28, 2000)

- ENHANCEMENT: Added the Initial View command to the
  Options menu, which allows the application's initial view
  to be set. You can now specify whether you want CyberSky
  to start up with the standard north, east, south, west,
  or zenith view.

- ENHANCEMENT: Added the Deep Sky Objects section to the
  application's Help file. The first topic in this section
  provides information about the deep sky object catalogs
  used by CyberSky. The other five topics describe the
  classifications of galaxies, globular clusters, open
  clusters, bright nebulae, and planetary nebulae displayed
  in the Deep Sky Object Data dialog box.

- CORRECTION: The proper motions of stars weren't being
  calculated correctly. Specifically, the right ascension
  components of proper motion were too small.

- CORRECTION: The magnitude of Saturn displayed in the
  Planet Data and Planets Data dialog boxes wasn't correct.
  The code used to calculate this value didn't take into
  account the light reflected by the planet's rings.

- CORRECTION: The position of the galactic equator wasn't
  being calculated correctly. The galactic equator wasn't
  fixed with respect to the background stars, but would
  instead move across the celestial sphere over time.

- CORRECTION: Searching for horizontal coordinates near the
  horizon when in horizon mode failed to center the correct
  coordinates. Atmospheric refraction calculations were
  being performed when they shouldn't have been.

- MODIFICATION: Various commands that were previously
  disabled during full screen mode, animation, or real time
  mode are no longer disabled. If you use a command that
  requires that full screen mode, animation, or real time
  mode be turned off, CyberSky will alert you with a
  message box, and you'll have the option to continue or to
  cancel the command.

- MODIFICATION: If animation was left running for a while,
  or the animation time step was set to a large value, the
  date could reach a value far outside CyberSky's allowed
  range of 4000 BC to 4000 AD. This not only resulted in
  completely incorrect sky charts, but also could cause the
  application to crash. To prevent this from happening,
  animation is now automatically turned off if the date
  goes too far outside the allowed range.

CYBERSKY 3.1 (FEBRUARY 24, 2000)

- ENHANCEMENT: Increased the speed at which stars,
  constellation figures, deep sky objects, and solar system
  objects are drawn. This is especially noticeable at high
  zoom levels. When only stars and solar system objects are
  displayed, animation at 32X is about five times faster
  than before. When locked on Jupiter, animation at 512X is
  about seven times faster than before. When locked on
  Saturn, animation at 4096X is about four times faster
  than before.

- ENHANCEMENT: Added the Zodiacal only box to the
  Constellations dialog box, which allows only zodiacal
  constellation figures to be displayed.

- ENHANCEMENT: Added the Copy button to the Planets Data
  dialog box, which allows the data displayed by this
  dialog box to be copied onto the clipboard, pasted into
  an editor or word processor, and then saved to a file or
  printed.

- CORRECTION: The equatorial coordinates at the center of
  the sky chart were not calculated correctly when horizon
  mode was turned on and the horizon was displayed. This
  was due to a bug in code that reverses the effects of
  atmospheric refraction. This caused a number of problems
  that became noticeable at very high zoom levels,
  especially when the viewpoint was near the horizon.
  Objects that should have been displayed were not
  displayed. Grids and lines were only partially displayed,
  or were not displayed at all. The equatorial coordinates
  displayed in the Pointer bar were not correct.

- CORRECTION: The lines that make up the constellation
  figures were sometimes not displayed correctly. This was
  due to a bug in code that performs line clipping, and
  occurred only at very high zoom levels.

- CORRECTION: The sun and moon were sometimes displayed
  when they were in fact not visible in the area of sky
  being displayed. This was due to a bug in code that
  converts equatorial coordinates to screen coordinates,
  and occurred only at very high zoom levels.

- CORRECTION: The dark parts of solar system object disks
  were not printed correctly. When the sky chart was
  printed in black and white, the dark parts of disks were
  not filled, which allowed objects, grids, and lines to be
  seen through them. When the sky chart was printed in
  color, the dark parts of disks were filled with the same
  colors used to fill the light parts, which caused the
  objects to always appear as if they were at full phase.

CYBERSKY 3.0.3 (OCTOBER 14, 1999)

- ENHANCEMENT: Added the Keyboard Shortcuts, Ordering
  Information, and Registration Benefits commands to the
  Help menu to make it easier to access the associated
  topics in the program's Help file.

- CORRECTION: The Save Bitmap command on the File menu was
  disabled if the program could not find an available
  printer at startup.

- CORRECTION: The popup menu that appeared when a Messier
  object fainter than magnitude 8.5 was right-clicked did
  not include an About command for that object. This made
  it impossible to display the Deep Sky Object Data dialog
  box for that object.

- MODIFICATION: When the program starts up in horizon mode,
  it now displays the sky above the south horizon if the
  location is on or above the equator, or above the north
  horizon if the location is below the equator. Previously,
  the program always displayed the sky above the south
  horizon at startup.

- MODIFICATION: When the animation time step is set to one
  or more years, the size of each step is now adjusted so
  that the year changes during animation but the month and
  day remain the same. Previously, the size of each step
  was constant, which caused the month and day to change
  during animation due to the addition of leap days to the
  calendar.

CYBERSKY 3.0.2 (JULY 29, 1999)

- CORRECTION: The Deep Sky Object Data dialog box did not
  correctly classify open clusters; they were instead
  classified as globular clusters.

CYBERSKY 3.0.1 (JUNE 10, 1999)

- CORRECTION: The Left and Right commands did not scroll
  the sky chart correctly when atlas mode was turned on.
  The Left command scrolled the sky chart to the right
  rather than to the left, and the Right command scrolled
  the sky chart to the left rather than to the right.

- CORRECTION: A system resource leak occurred when the path
  of a solar system object was displayed with date or time
  labels. This caused the amount of free system resources
  to drop each time the sky chart was drawn. If this system
  resource leak continued, it eventually caused the program
  to stop functioning correctly.

- CORRECTION: The data displayed in the Seasons Data dialog
  box did not reflect the fact that the four seasons start
  at different times of the year in the Southern Hemisphere
  than they do in the Northern Hemisphere.

