Celestia Revision History
-------------------------

1.00
* Initial public release


1.01
* Added more realistic and aesthetically pleasing ring illumination function
* Made planets project shadows onto their rings (requires multitexturing)
* Detect and use ARB_multitexture extension
* Some configuration parameters now read from a file
* Support for multiple solar system catalog files
* Split solar system files into solarsys.ssc and extrasolar.ssc
* Added Help/License menu
* Added simple camera orbit mode
* Fixed up parsing and printing of catalog numbers--still kludgy though


1.02
* Made Celestia icon appear in corner of window.  Whee.
* Fixed an extremely subtle numerical precision bug which manifested itself in
  a number of ways:  jittering when following small objects, incorrect
  targeting of small objects with goto, occasional flashes when closely
  approaching an object, and probably other things as well.
* Reversed rotation directions when orbiting--it's much more intuitive now
* Added an exponential dolly capability to the camera
* Double-clicking will now center on the selected object
* Fixed bug in elliptical orbit calculation
* When orbits are displayed, the Orbit for the selected object is highlighted
* Incorporated Scott Hudson's asteroid geometry data for Toutatis, Kleopatra,
  and Geographos.
* Fixed problems with disappearing labels and with misplaced labels for
  extrasolar planets
* Eliminated 'sticking' when mouse buttons released outside of Celestia window
* Added Real Time option to Time menu
* Reversed planet rotation direction so it's correct.  Oops.
* Added about a dozen extrasolar systems from Jean Schneider's catalog
* Create two new textures for extrasolar planets
* Moved Selection class outside of Simulation, as it's generally useful


1.03
* Rotating the camera is now more responsive to mouse movement
* 'Infinite mouse' hack allows rotating and dollying without having to pick up
  the mouse and reposition the cursor in the window
* Fixed z ordering for planets and satellites so small that they only appear
  as points.  Small satellites will no longer get obscured by planets they're
  in front of.
* Apparent magnitude calculation for planets now takes into account phase
* At close range, stars are now rendered as textured sphere meshes.
* Choosing stars by catalog number no longer selects a star even when the specified
  star doesn't exist.
* Added labels for stars; the list of labelled stars is read from celestia.cfg
* Cleaned up vecmath.h, added consts and reference parameters where appropriate
* Cleaned up StarNameDatabase


1.04
* Start out at the moon instead of in deep space
* Made picking of planets work properly for planets with disc sizes greater than one
  pixel.
* Added call to glDeleteTextures to Texture class destructor
* Added bump mapping.  Uses DOT3 bump mapping and only works on GeForce cards
  right now.
* Enabled user control of per-pixel lighting.
* Menu checked state for label options synced with renderer state.
* Added a context menu that appears when an object is right clicked.
* Celestia now uses texture coordinates from 3DS files
* Added 3DS model of Eros based on NEAR laser rangefinder data
* Added 3DS models of Deimos, Phobos, and numerous other asteroids and
  small moons based on Phil Stooke's models
* Replaced TriangleList class with much more flexible VertexList
* Introduced support for compressed textures; texture compression is specified
  on a per texture basis in .ssc files.
* Added a reverse time option
* Added an OpenGL Driver Info item to the help menu


1.05
* Made per-pixel lighting work for planets without bump maps too
* Allow user control of magnitude of faintest visible stars
* Added support for PNG textures
* Improved console: enabled backspace, relocated text entry, code cleanup, ...
* Corrected star positions by converting them from equatorial to ecliptical
  coordinates.
* Eliminated case sensitivity when selecting objects by name
* New ring texture for Saturn with separate reflectance and opacity
* Ring textures now specified in .ssc files instead of hardcoded
* Implemented date/time selector dialog box
* Changed the mouse wheel function from zoom to dolly.  Zoom is now controlled by
  shift left-dragging the mouse.  For mice without wheels, control left-dragging
  will dolly.
* Fixed orbit and dolly functions to work in follow mode
* Improved rendering of objects at close range: less clipping, extra sphere LOD.
* Fixed bug that caused irregular objects to be displayed at half their actual size
* ESC now cancels goto and follow instead of exiting app.
* Fixed orbital calculations for planets so their positions are now closer to
  reality.
* Completed extrasolar planets database; it now contains all known planets
  around normal stars
* Mir!
* MeanAnomaly field in .ssc files was incorrectly called TrueAnomaly; this
  is fixed, and solar system parser now also accepts MeanLongitude in orbital
  elements section.
* Epoch can now be specified for orbital elements.  Default is J2000.


1.06
* Made Alt+F4 exit the app.
* Fixed text rendering to be pixel-accurate; labels and console text are now
  crisper and don't have any missing pixels (need to test on more graphics
  chipsets.)
* Updated parser to handle negative numbers.  Big oops.
* Corrected errors and omissions in extrasolar planets catalog.
* Added locations menu for saving and recalling favorite places.
* Added intro message.
* Removed stars without spectral class info from database.
* Included support for cloud maps
* Added extrasolar planets from the ESO's April 4th announcement
* Axial rotation for stars
* Alleviated clipping of very distant stars (Deneb was missing from Earth's
  sky due to this bug.)
* Increased depth buffer precision for planet rendering--this should improve
  the quality of rendering with 16-bit z buffers
* Added option to render constellation diagrams
* Use strips instead of lists for rendering spheres
* Enabled keyboard control of zoom with home and end
* Implemented basics of linear scripting system
* Run a script at startup; the script filename can be set in the config file

Code revisions:
* Converted Simulation class to use Julian days instead of seconds as internal
  time units.
* Eliminated brain damaged observer methods in Simulation
* Cleaned up Console class


1.07
* More corrections to planetary orbital calculations
* Accept LongOfPericenter as well ArgOfPericenter in solar system catalog files
* Updated parser to accept C-style string escapes
* Render the Milky Way and other galaxies
* Added more constellations
* Display constellation names
* Cleaned up render menu
* Added FPS counter
* Implemented basic WWW info feature for planets and stars
* New script commands: renderflags, labels, orbit
* Implemented a scripted demo mode
* Placed ISS in Earth orbit


1.08
* Initial UNIX port
* Created GLUT based front-end
* Created abstract Timer class with Windows and UNIX implementations


1.09
* UNIX port fixes: eliminated friend templates in Quaternion, added -lm to
  configure.in, added missing return type for methods in Console and Overlay


1.0.10
* Fixed problem with ring shadow texture by setting wrap mode to GL_CLAMP_TO_EDGE
* Corrected scale of ring shadow to match size of planet
* Switched to octree based visibility determinination algorithm for
  stars.  The result is better rendering performance, especially when
  many stars are displayed.  The octree algorithm is also lag free, meaning
  that all star "popping" is eliminated.
* Added setvisibilitylimit command for scripting.
* Fonts now selectable in celestia.cfg
* Added more and fewer visible stars options to render menu
* Fixed BigFix precision bug that appeared only with certain compiler versions.
* UNIX version: Enabled arrow keys and home/end in UNIX version
* UNIX version: Implemented frame rate counter
* UNIX version: Added mouse wheel support
* UNIX version: Fixed bug that caused picking to happen while dragging mouse
* UNIX version: Added more compiler optimization flags to Makefile
* UNIX version: Ctrl-Q now exits program
* UNIX version: Fixed vertically flipped textures
* UNIX version: Initial Gtk+ version, with rudimentary GUI


1.1.0
* Added RotationPhase field to solar system bodies; tweaking this makes sure
  that the right part of the planet is dark at a given time.
* Changed axial tilt of Earth so that the North Pole is illuminated in summer,
  not winter.
* Added option to render celestial coordinate sphere
* Added geosynchronous follow mode
* Added synchronous command to enable geosynchronous follow mode
* Fixed disappearing stars when modifying field of view
* Fixed bug reading angle in galaxies file
* Made it possible to select an object by 'path' e.g. Sol/Earth/Moon
* Bound { and } keys to control ambient light level
* Windows version: added solar system browser window
* Windows version: added star browser window
* Windows version: separated update from redraw so animation no longer occurs
  when dragging modal dialogs over the view window
* Windows version: made context menus work when running fullscreen

Code:
* Fixed bug in quaternion to matrix conversion; conversion was returning the
  matrix representation of the conjugate.
* Moved common UI code into CelestiaCore


1.1.1
* Added spectral type field to star browser
* Fixed bug that was causing garbled fonts in some cases
* Added missing minus character to default label font
* Many more options for goto--pick a specific long and lat, set coordinate
  frame, choose up vector
* Changed camera rotation interpolation--now use quaternion slerp
* Constrained parallaxes of stars which are components of multistar systems;
  binary stars now actually close to each other and not just when viewed
  from Earth.
* Fixed another stupid sign problem--north celestial pole is now positive,
  not negative y.  This change should be invisible to a user.
* Replaced welcome message with logo texture

Code:
* Moved selection info code from Simulation to CelestiaCore
* Fixed bug in Texture destructor


1.1.2
* Replaced single catalog number with separate entries for HD and HIP numbers
* Expanded star name database and rewrote star name code to be less strict
  when matching names.
* Added track mode
* Changed displayed units of distance and velocity
* Fixed picking of stars so it works properly at close distances
* Fixed bug that caused solar systems not to be displayed when another star
  was nearby (this made it impossible to visit the planets of Gliese 876)
* Fixed inverted bump maps
* Now use exponential interpolation during goto movement.
* New Jupiter texture based on Cassini images
* Added a tour guide feature
* Added more constellation diagrams
* Windows version: save and restore window size settings in registry
* Windows version: added toggle between GMT and local time
* Windows version: added keyboard command mnemonics to menus
* Windows version: InstallShield setup
* Windows version: added controls help dialog
* UNIX version: implemented find object and about dialogs (Gnome/Gtk only)
	
Code:
* Moved star browser and solar system browser code into separate modules
* Fixed DPRINTF macro so it's not broken in g++


1.1.3
* Added city light map for night side of Earth
* Specular reflections for Earth's oceans
* Haze effects for planets and moons with atmospheres
* Optimized star rendering--faster, uses substantially less memory
  when many stars visible
* Changed minimum limiting magnitude from 8.0 to 12.0
* Support for nVidia vertex programs
* Eliminated 'seams' in normalization cube maps used for lighting
* View frustum culling of planets and nearby stars
* Fixed clipping that occurred when close to planets
* Fixed depth buffer precision problems (most apparent with spacecraft)
* Tidied up display of speed, distance, and star/planet statistics.
* Changed how modes work--goto won't break follow and sync follow modes
  any more
* Fixed underlit planets on GL implementations without EXT_rescale_normal
* Type K, M, R, S, and N stars now cast a red tinted light on their planets
* New Earth texture
* Print less debugging spew on startup
* Integrated Colin Walters endianness fixes
* Windows version: info about max texture size and number of simultaneous
  textures added to OpenGL Info dialog.
* New objects: Comet Borrelly, the giant Kuiper Belt object 2001 KX76,
  and the Hubble Space Telescope
	
Code:
* Rewrote texture and model managers
* Cleaned up simulation.cpp to use frames of reference and eliminated a lot
  of special case code for the different 'modes'
* Stopped using the Intel JPEG library on Windows; instead, the Independent
  JPEG Group's library is now used on all platforms.


1.1.4
* Fixed text rendering problems that appeared on Matrox cards
* Windows version: fixed bug that broke web info for stars
* Windows version: improved web info feature so that it doesn't launch a new
  instance of IE every time.
* Added eight new extrasolar planets announced 15 Oct
* Fixed goto command so that it doesn't ever place you inside a planet
* Allow navigation with number pad
* Much greater resolution in planet meshes
* Implemented atmospheric effects
* Modified center so it does not change the frame of reference--will prevent
  suddenly leaving the ground when used on the surface of a planet.
* Changed rendering order so star and constellation labels are obscured by
  planets.
* Corrected satellite obliquities--they should have been relative to their
  planets equatorial plane.
* Eliminated premature clipping of irregular bodies at close range
* Fixed problem with lighting on S3 Savage4
* Fixed clipping bug with fields of view greater than 45 degrees
* Introduced support for custom orbital calculations
* Much more accurate orbital calculations for Earth and Moon; eclipses now
  occur at the correct time.  Also, introduced accurate calculations for
  other solar system planets except Pluto.
* Require solar system catalog files have orbital elements in an
  EllipticalOrbit group.
* Added four more asteroids with models by Scott Hudson: KY26, Castalia,
  Bacchus, and Golevka
* Added keyboard commands to toggle night side lights (Ctrl+L) and
  atmospheres (Ctrl+A)
* Added a 'Goto Object' dialog box, which lets you specify an object name
  and distance, longitude, and latitude.
* Implemented a screen capture feature
* Windows version: added a star browser option to display just those stars
  with planetary systems.
* Windows version: fixed bug in Set Time dialog that wouldn't allow setting
  both the date and the time of day.
* Windows version: added basic joystick support.
* Windows version: fixed 'jumping' that occurred when using Goto or Follow
  from popup menu.
* Windows version: added 'Set to Current Time' button in Set Time dialog
* Windows version: fixed selection of planetary satellites via context menu
* Windows version: made tab, return, and escape work properly in modeless
  dialogs
* Unix version: created installer (Deon Ramsey)

Code:
* Rewrote texture font code; texfont.cpp is gone, everything now in
  texturefont.cpp


1.2.0
* Fixed problem with image capture function that saved skewed images for some
  windows widths.
* Changed field of view display to use minutes and seconds
* Fixed display of time scale when time is reversed
* Fixed jittering labels for stars distant from the sun
* Fixed depth ordering problem that caused satellites to appear in front of
  the horizon when viewed from the surface of Earth
* Made the correct hemisphere of the Moon face Earth
* Fixed Earth's rotation so that sunrise and sunset times are correct
* Fixed picking so that clicking on a distant planet will never select one of
  its satellites.
* Improved orbit calculation code to properly compute eccentric anomaly
* Render orbit outlines behind planets instead of in front of them
* Made it possible for clouds to move relative to the ground
* Eliminated star haloes that were visible in daylight
* Added Uranus's ring system
* Added Shrox's Mars Global Surveyor and Mars Odyssey models
* Windows: save rendering and label settings
* Windows: added movie capture feature
* Windows: fixed disappearing mouse cursor bug
* Windows: added slider for controlling number of stars displayed by
  star browser.
* Windows: vastly improved full screen support
* Windows: fixed non-functioning Fewer Stars menu option
* Unix: fixed problems with '--enable-debug' under automake (dramsey)
* Unix: Enhanced autoconfigure to enable automated distribution build, as well
        as building the buildstardb program used to create stars.dat (dramsey)
* Unix: Fixed Problem with --enable-debug=no acting as if --enable-debug=yes
        had been given. (dramsey)
* Unix: Changed --enable-gtk into --with-gtk, and made it automatic if Gtk+ and
        GtkGLArea is present. (dramsey)
* Unix: Inserted testing code for GtkGLArea into configure.in (dramsey)
* Unix: Integrated a current gnome macros package. (dramsey)
* Removed many errors and compiler warnings (dramsey)
* Label Galaxies option. (dramsey)
* Unix Gtk : Added several menu options already present in the windows version.
             (dramsey)
* Unix Gtk : Fixed problem where giving keyboard commands wasn't updating
	     the toggle menu gadgets. (dramsey)
* Unix : Handle timezones correctly. (dramsey)
* Fixed constellation typo: Cyngi -> Cygni
* Much better Data analysis and Correction for the buildstardb program
  leading to better data in stars.dat . Verbosity of the buildstardb program
  may now be controlled by commandline argument. (dramsey)
* Improved solar system catalog file format so it's easier to install add-ons
* Scan extras directory for solar system catalog files
* Fixed pixel shader rendering path so it uses star light color
* Added support for textures in 3DS models
* Fixed locations menu
* Improved locations menu so that position and frame of reference are saved
  and restored.
* Fixed broken script commands: setposition, setorientation, and move
* Display the names of tracked and followed objects
* Windows: replaced proliferating render and label options in menu with
  a single modeless dialog.
* Fixed period and rotation of Phoebe

	
1.2.1
* Unix: configure.in changes to better find OpenGL libraries by Bruckner.
* Added accurate orbital calculations for Galilean satellites.
* Added tolerance parameter for picking to make picking objects in a narrow
  narrow field of view work better.
* New texture for Miranda courtesy of Bruckner.
* Windows: Fixed bug that caused a crash when canceling the view options dialog
* Windows: Fixed crash that occurred when recalling a location with
  no selection

	
1.2.2
* Improved find algorithm for starnames, and combined names from hdnames.dat
  into starnames.dat. Also added several additional names and variant spellings
  from my Star Atlas into starnames.dat (whose format has been completely
  revamped). (dramsey)
* Unix GTK: Got Ctrl-Q to exit the Program properly. (dramsey)
* Unix GTK: Capture Filenames now starts up with a proper filename, remembers
            the last directory, and complains about bad filenames. (dramsey)
* Added 'verbose' option, and supressed most non-error type messages unless
  verbose is set. (dramsey)
* Made picking exact for oblate planets
* Optimized rendering of planet meshes
* Switched to high levels of details when camera is near surface of a planet
* Improved the appearance of the corona around stars
* Fixed specular lighting for 3DS meshes, but correcting the mapping of 3DS
  shininess to OpenGL specular exponents.
* Multi Resolution Texturing. (dramsey)
* Unix: Much improved recognition of missing packages in configure. (dramsey)
* Added rendering of eclipse shadows
* Implemented longitude of axis for planet rotation elements
* Corrected inclinations of Saturn (now rings appear at proper tilt when viewed
  from Earth), Uranus, and Neptune.
* Added accurate orbital calculations for the eight largest moons of Saturn
* Textures for Ariel, Umbriel, Titania, and Umbriel from Bruckner.
* Improved planet labeling: less clutter, plus labels are displayed for distant
  objects at high zoom levels.
* Fixed rendering of ring systems so that planets with both rings and
  a cloud layer are rendered correctly.
* Added accurate orbital calculations for the five largest moons of Uranus
* Added option to render stars as points (for a less fuzzy appearance)
* Corrected sizing of planets' shadows on their ring systems
* Enabled used of extremely high resolution textures through splitting into
  subtextures.
* Corrected orbital elements for Ceres, Pallas, Juno, and Vesta.
* Added Ikeya-Zhang to solar system
* Fixed position calculation for orbits with 0.98 < e < 1
* Enabled rendering of 3DS meshes with transparent parts
* Unix Gtk: New Renderer Options
* Fixed colors on the Hubble model
* Fixed some clipping problems with 3DS meshes caused by bad center calculation
* Enhanced Locations menu to support full manipulation and categorization of
  saved locations.


1.2.3
* Fixed bug in texturefont.cpp that produce an error with some STL
  implementations (VS.NET, HPUX)
* Added elapsed time counter to movie recording UI
* Added support for orbits interpolated from sampled positions
* Fixed 'crosshair' appearance of eclipse shadows on some cards
* Enforced power of two texture size requirement--eliminates texture loading
  crashes on some systems
* UNIX: Modified GL extension handling code to make it possible to compile
  against Mesa 4 headers.


1.2.4
* Fixed bug that caused alpha blending to always be enabled for 3DS meshes
* Fixed sign error in that caused some orbits to be retrograde
* Fixed rendering of night lights to ignore ambient color (keeps night lights
  from being visible on lit side of planet.)
* Improved precision to eliminate position drifting because of rounding errors
  (was apparent when orbiting within 1km of an object)
* Replaced perfectly spherical Comet Halley with an irregular model
* Added object classifications and label coloring based on them
* Created new 'phase-lock' coordinate system
* Created new 'chase' coordinate system
* Unix Gtk: removed bug in Text enter mode. (dramsey)
* Unix Gtk: Menus for new Labels. (dramsey)
* Unix Gtk: Star Browser Body Types. (dramsey)
* Unix Gtk: Correct Underlines for Menus. (dramsey)
* Guess Body Types more accurately. (dramsey)
* Support hyperbolic orbits
* Improved algorithm for calculating positions on highly eccentric orbits
* Added setambientlight scripting command
* Enabled rendering of satellite orbits
* Windows: added open script option to file menu
* Changed orbit and dolly functions so they operate with respect to the
  current reference object instead of the selection.
* Made Goto command automatically switch to follow mode
* Fixed customorbit.cpp to compile on HP/UX
* Fixed appearance of galaxies when viewed from inside an atmosphere
* Removed duplicate entry for Iota Horologii (HR 810) in exoplanet catalog
* Unix: fixed GL extension code so it's possible to compile with Mesa 4 headers
* Unix: fixed byte swapping code
* Fixed bug that caused distant stars to disappear when viewed at some angles
* Unix Gtk: removed problem preventing ShowClouds from working. (dramsey)
* Unix Gtk: Options Dialog. (dramsey)
* Celestia Watcher extended. (dramsey)
* Unix Glut: Keyboard handling corrected. (dramsey)
* Galaxy labels were being placed incorrectly. (dramsey)
* Fixed slowdown while rendering shadows on TNT, Rage Pro cards
* Model precession of rotation axis
* New script commands: set, gotoloc, chase, lock
* Fixed orbits of major planets so that they don't get wacky far into the
  future or past
* Windows: fixed image capture in Windows so it doesn't screw up texture loading
* Display time to arrival when travelling
* Added preloadtex command for scripting
* Enforce a maximum time rate of 1e15 times normal


1.2.5
* Implemented text-based auxilliary star catalogs
* Added orientation property for planets
* Corrected rotation of Toutatis
* Improved specular highlights on planets (use local viewer model)
* Added constellation boundaries
* Fixed z fighting when cloud layers are used with vertex shaders
* Added Christopher Andre's eclipse finder for windows
* Fixed writing of locations file so locations still work after restarting
* Comets
* Added newly discovered extrasolar planets
* Added InfoURL field for objects in .ssc files
* Numerous Gtk UI fixes (details?)
* Fixed 'squareness' of planets and moons viewed at a distance
* Middle mouse button toggles between 45 degree and last field of view
* Added FOV to set command, so scripts can set the field of view.
* Made ring shadows optional
* Added distance filtering for stars
* Encode/decode Tycho catalog numbers, to support extended star database
* Fixed Moon's orbit so it doesn't crash into the Earth far in the future
* Improved vertex shader illumination for planetary rings
* Better text display from .cel scripts
* Added text "flash" messages for many keyboard commands
* Fixed Windows Solar System Browser to allow arbitrary depth tree
* Added shadows cast by rings onto planets
* Fixed lots of bugs with sampled orbits (.xyz files)
* Added RotateAcceleration field to config file; allows adjustment of
  navigation control sensitivity
* Improved accuracy of orbital calculations; VSOP87 series for all planets
* Added beginning/ending fields to definitions in .ssc files; allows
  setting finite lifespans for objects
* Made galaxies pickable
* Added view frustum culling of galaxies, for much improved performance
* Allow date strings Beginning, Ending, and Epoch fields of .ssc files
* Fixed incorrect occlusion of small satellites orbiting close to planets
* New set of constellation figures
* Sync'd mouse functions in Windows and Linux versions of Celestia
* Linux: fixed dialing ranges in set time dialog
* Fixed texture lookup to use higher res textures if a low res one isn't
  available
* Made steering keys on keypad turn the camera at a rate proportional to the
  field of view
* Added 'automag' option to automatically adjust the limiting magnitude based
  on the field of view (i.e. fainter stars become visible when the fov is
  decreased)
* Fixed haloes around bright stars so they're fixed in size regardless of
  field of view
* New colors for celestial grid and constellation figures
* Tuning of Gnome GUI: underlined key accelerators, enabled operation of all
  dialogs and menus with ALT <key>, arrow keys, and Tab
* Linux: GUI now synced with current state of pixel/vertex shaders 
* New keyboard bindings:
  Ctrl+Y    : automag toggle
  Ctrl+T    : toggle display of comet tails
  Ctrl+B    : constellation boundaries toggle
  !         : use current time
  Backspace : clear selection
* Reversed more/fewer stars keys ([ and ]) to be consistent with more/less
  ambient light keys
* Added support for multiple extras directories
* Reduced minimum field of view down to 3 arcsec
* Fixed glitch with center command that appeared under Linux and on Windows
  when building with VS.NET
* Cleaned up OpenGL extension initialization
* Significantly improved the reliability of object selection via mouse
  click, notably for small fields of view in the arcsec range. 
* Fixed the 'move' script command
* New script commands: setfaintestautomag45deg {magnitude float}, 
  lookback {} 
* [,] keys now adjust the limiting magnitude at 45 degrees 
  field of view, if automag is ON. Values displayed via flash messages  
* Associated the 'looking back' operation  with the '*' key shortcut
* Fixed bug in orbits of Galilean moons
* Corrected equatorial planes and rotation offsets for the major planets
* Linux: Added KDE interface, all features of the GTK interface are 
  available (except for the Tour Guide), new features include:
   - Bookmarks / URLs;
   - History navigation;* Improved drag and drop of cel:// URLs on Windows
   - Configurable shortcuts and tool bar;
   - Contextual menus;
   - Saved Settings and Preferences.
  Integration with KDE:
   - New Mime Type application/x-celestia-script for *.cel files;
   - *.cel files and cel:// URLs are associated with Celestia, if no instance
     of Celestia is running when the file or URL is activated it will be
     started and the script will be run or the location set to that of the URL.
     If an instance is already running the script will be run in that instance
     or that instance's location will be changed to match the URL.
* Added drag and drop and copy to clipboard for cel:// URLs on Windows
* Improved drag and drop of cel:// URLs on Windows

1.3.0
* Integrated more of Grant Hutchinson's corrections for the orientations of
  solar system bodies
* Updates for asteroids and comets from Grant Hutchinson:
   - Added Phil Stooke's textures for the asteroids Ida and Gaspra
   - Fixed mirror-reversal of Ida and Gaspra meshes (Grant Hutchinson)
   - Use orbital elements valid for the Galileo encounters of Ida and Gaspra
   - Corrected rotation parameters
* Made name matching for galaxies case-insensitive
* Corrected orbits of Uranians satellites Miranda, Ariel, Umbriel, Titania and
  Oberon.
* cel:// URL fixes
   - Added support for relative URLs
   - Improved drag and drop support on Windows
   - Browser integration on Windows: clicking on a cel:// URL launches Celestia
   - Better time precision
* Added new keyboard commands for dealing with light time delay
   - ? : show light time delay between current position and selected object
   - - (minus) : compensate for light time : subtract light travel time to
     selected object from the current time
* KDE interface: add subtract light time button to Set Time dialog
* Added cubic interpolation option for sampled trajectories (.xyz files)
* Added NormalMap field for .ssc files
* Prevent crashing when CompressTexture true is specified for an already compressed texture.
* KDE: Implement eclipse finder
   - Eclipse finder code separated into UI and platform-independent parts
* Added basic support for rendering nebula as 3ds meshes.
* Modified format of galaxies file to handle other deep sky objects as well
* Added OpenCluster objects
* Implemented 'markers'
   - Selection is highlighted with a marker
   - Markers may also be set on objects using the right-click context menu
   - Added mark/unmark commands for scripts
   - Bound Ctrl+K to toggle display of markers
   - Added flash messages indicating on|off status of markers 
   - Implemented markers into KDE interface	
* Added triangle-accurate picking of mesh objects
* Multiview
   - Ctrl+R : split view vertically
   - Ctrl+U : split view horizontally
   - TAB    : cycle active view
   - DEL    : delete active view
   - Ctrl+D : delete all views except active one
   - Views may be resized by dragging on borders
   - Multview functions also available in the view menu
* Eliminated eclipse shadows appearing on wrong side of planet
* Added support for specular and bump map effects across a wider range
  of graphics hardware.
   - Introduced notion of a render path
   - Ctrl+V changed to cycle render path instead of toggle vertex shader
   - Added IgnoreGLExtensions directive for celestia.cfg
* Added track command for script
* Fixed eclipse shadow z-fighting artifacts
* Fixed vertical mirroring of textures on 3DS models
* Fixed problems with bump mapping
* Enabled loading of .cel scripts through the Windows or KDE shell
* New directory structure for add-ons; meshes, textures, and other media
  may now be located withing an add-on subdirectory.
* Added texture for Eros
* Added separate cloud and surface textures for Venus
* New "invisible" class for solar system objects
* Fixed crashes that occurred when viewing ringed planets on older hardware
* Got rid of three zeros after decimal point when displaying time rate
* Updated configuration files for new versions of autoconf

1.3.1
* Improved inclusion of light travel delay, also in KDE time setting dialog 
* Fixed lookback command for subsequent changes of target speed
* Allow wildcard character * inplace of extension for texture filenames
* Fix bump mapping (again)
* Use standard normal maps instead of x-reversed ones
* Compute the radii of stars more accurately by using bolometric magnitudes
* Permit star names to be defined within .stc files
* Fixed near clipping of small deep sky objects
* Windows: added auto magnitude toggle to render menu
* KDE: added popup error notifications
* Allow oblate planets to have atmospheres
* Corrected specular highlights; abrupt cutoff near terminator eliminated
* Fixed 'hole in the sky' bug
* Allow sunset color to be specified in .ssc files
* Improved rendering of objects in daytime skies
* Bound Ctrl+P to mark/unmark selection
* Implemented tab completion of star, planet, and deep sky object names
* Implemented new, scientifically accurate Pluto-Charon textures
* Windows: bound Ctrl+C to copy cel:// URL to clipboard
* Modified the way field of view works: compute the field of view based
  on distance to screen, monitor resolution, and view size; don't attempt
  to maintain a constant vertical FOV when splitting views.
* Implemented alternate surfaces for planets
* Added overlay textures that are applied on top of other surface maps
* Bound + to toggle limit of knowledge maps
* Improved estimates for stellar rotation period; previously all stars
  were assigned the same rotation rate as the sun.
* Added locations--labels of planetary surface features
* Bound & to toggle display of location labels
* Added a locations dialog for controlling the display of locations
* Allow orbit paths to be turned on independently for all object classes
* Added a 'scaled disc' style for rendering stars
* Bound shift+arrow keys to orbit reference object
* Added unmarkall command for scripting
* Added missing render flags for script commands: automag, atmospheres, grid
* Added a MeshCenter field for properly position and rotation of 3DS meshes
* Implemented virtual textures, for ultra-high resolution texture mapping of
  planets.
* Added textures for Hyperion and Proteus
* Made cancel script command stop motion, tracking, and any object-relative
  coordinate system.
* Adjusted estimates for radii and rotation periods of extrasolar planets;
  rotation rates account (somewhat) for the effects of tidal despinning. 
* Fixed a bug that was causing precision loss in orientation values; this fixes
  some of the jerkiness apparent at very low fields of view.
* Corrected radii of Uranus's rings
* Added ring system for Neptune
* Corrected errors in Callisto's orbit
* Modify the right-drag rotation rate based on the distance between the
  camera and the selection.
* Made ambient light work for bump mapped objects in the vertex program/DOT3
  render path.
* Bound Shift+C to center/orbit.  This places the selection in middle of
  the view while keeping the reference object at the same point in the view.
* Added locations-labels of all world capitals (240) with importance
  weights calculated from their numbers of inhabitants
* Added solar system location labels

1.3.2
* Added support for extended character sets (most of WGL4) and UTF-8 encoded
  strings
* Updated info display to show apparent size of selected object
* Enable tab completion of location names
* Introduced support for JPL ephemeris files
* Fixed crash in Windows star browser that occurred after changing the number
  of stars and pressing return.
* Fixed bug that made stars and galaxies appear square when certain nebulae
  were in view.
* Made the delete button in the Windows bookmarks organizer actually work
* Updated orbits for Amalthea and Phoebe
* Fixed seams in Jupiter and Phobos textures
* Spacecraft orbit paths adaptively sampled for smoother results
* Eliminated obscuring of location labels that occurred low view aspect ratios
* Added models of comet Halley and the small moons Pandora and Larissa
* Added limit of knowledge masks for the Galilean moons
* Changed spectral class of carbon stars to C, which supercedes and combines
  R and N
* Lua scripting additions
  * View management commands
  * Image capture commands
  * Made setrenderflags and setlabelflags accept a table
  * Orbit and locations settings
  * observer:cancelgoto
* Made the cursor shape change to the resize icon when positioned over view
  borders
* Added a new 3D file format: cmod, the Celestia model format
* Documented the fields in celestia.cfg with extensive comments
* Added newly discovered extrasolar planet HD 330075 b
* Added Cassini and Huygens models and trajectories
* Fixed crashing bug in the eclipse finder
* Changed default start location to Earth
* Revised some erroneous spectral classes in star catalog
* Made solar system objects occlude labels of more distant objects
* Implemented an algorithm for importance weights to avoid overlapping or
  too crowded location labels for Mars, Venus and the Moon
* Added new textures for Titan based on recent imaging from the Cassini
  mission 
* Improved depth sorting so that hidden surface removal works properly for
  overlapping objects
* Added theoretical estimates of oblateness and rotation rate for extrasolar
  planets
* Replaced old Io and Europa textures with improved versions
* Added disposition modifier for ssc objects to control what happens when
  an object with the same name and parent already exists.  The three possible
  behaviors are Add (the default), Replace, and Modify.
* WINDOWS: Limited CPU usage when main window is minimized
* WINDOWS: Changed preferred z-buffer depth from 16 to 24 bits to reduce
  z-fight artifacts.
* Fixed labels and info text so it looks crisp when multisample antialiasing
  is enabled.
* Eliminated flickering of location labels
* WINDOWS: Save texture resolution setting between sessions

1.4.0
* New stars.dat format with HD catalog numbers and parallax errors omitted
* Added catalog cross indexes for HD and SAO catalogs
* Fixed bugs in parsing catalog numbers
* Added white dwarf temperatures and  spectral types DA, DB, DC, DO, DQ, and DZ
* Added handling for partial spectral types where one or both of the subclass
  and luminosity class are unknown
* Permit extended star attributes in .stc files: mesh, texture, rotation
  elements, semiaxes
* Support multiple star systems of any complexity with orbits and barycenters
* Changed .stc loader so that a star definition with a duplicate catalog
  number replaces the previous definition
* Made catalog numbers optional in .stc files; stars can be defined without
  having to create fake catalog numbers
* Star colors now chosen based on temperature; either 'classic' and black body
  colors may be selected
* Bound % key to toggle between star color tables
* Fixed black holes: infinite radius bug gone, rendered just as a plain black
  sphere
* Added comprehensive catalog of all knows stars within 25 light years of the
  Sun, including orbits for multiple star systems
* Created new command line tools for building binary star databases
* Removed limitation that two or more solar systems couldn't be shown
  simultaneously
* Show light from multiple nearby stars illuminating planets
* Implemented new GLSL render path; NVIDIA combiners and GeForceFX paths
  deprecated.
* Display UTF-8 superscript digits in some star names
* Updated the Titan texture. It accomodates all published high resolution 
  imaging from the Cassini mission until and including the flyby of 03/31/05. 
* Updated the Iapetus texture. It accomodates all published high resolution
  imaging from the Cassini mission, including also a unique hires photo taken 
  in "Saturn shine". 
* Added catalogs of 163 visual and 39 spectroscopic binary orbits,
  respectively, (S�erhjelm 1999, Pourbaix 2000) with known primary/secondary
  mass ratios.
* Added an extended and precise data base of 942 galaxies 
  (Steinicke's rev. NGC/IC, 2005) with a magnitude cutoff Bmag < 12. 
* Included the commented PERL scripts used to extract and adapt the binary
  orbit and  galaxy data from published professional catalogs.
* Added --extrasdir command line option for specifying additional directories
  to search for add-ons
* Allowed time scale to be modified while simulation is paused
* Replaced Windows date picker with a custom one that can be used to set dates
  prior to 1752.
* Fixed a bug in the Windows time picker that was causing the set time to be
  off by however many seconds the dialog was active.
* Added parent field for stars in celx scripting's getinfo command
* GTK+ front-end overhaul
   - source split into multiple files
   - performance work to minimize number of preference resyncs
   - redesigned interface to use GtkActions and GtkUIManager (XML)
   - added preference saving to file
   - commented heavily
   - new about dialog
   - made non-modal: GoTo, View Options, Tour Guide, Browsers, EclipseFinder
   - changes to allow for compilation on Windows
   - greek letters in Star Browser names
   - added tab-completion support in overlay entry
   - replaced deprecated widgets in several dialogs
   - new GTK save/open dialog
   - added "copy" and "open" url functions
   - updated GConf schema with new options
   - fixed automake bug where GConf schema would always install
   - removed linking against glut for no reason
* Implemented complete precision catalog (Steinicke's revised NGC/IC, 2005) of
  10610 galaxies with 
   - distance information from  four catalogs ( 6 methods ), 
   - <= 4 alternate names, 
   - info-URLs, 
   - absolute magnitudes and 
   - correct sizes & orientations in space, as calculated from catalog
     parameters. 
* Included well commented Perl script (deepsky.pl) as documentation. The used distance determination method is indicated in catalog for each galaxy.
* Updated binary star data base (visualbins.stc, spectbins.dsc) and respective
  PERL catalog extraction scripts (visualbins.pl, spectbins.pl), such as to eliminate double occurences wrto nearstars.stc (, which remained unaffected).
* Added much improved galaxy templates.
* Implemented galaxy coloration based on hue profiles from true color
  photographic imaging. Being older than spirals, elliptical galaxies have a somewhat redder coloration.
* Implemented a realistic relative apparent brightness display scheme for
  galaxies.
* Added apparent magnitude display as function of distance on canvas.
* Added display of DSO Type (Galaxy,...) and Hubble subtype in case of
  galaxies.
* Changed the galaxy label color from yellow to blue-green for better
  visibility.
* Did extensive octree rebuilding. Culling of deep sky objects is logarithmic
  now, enabling support for very large catalogs with little performance expenses.
* Performed optimized tuning of octree parameters that practically recovers
  the "pre-galactic" performance, despite a large data base of 10610 galaxies.
* Added support for multiple names of deep sky objects and implemented
  non linear keyboard selection of names with corresponding tab completion, etc., like with the rest of the celestial bodies.
* Replaced deep sky catalog class with a more complex database, following the
  original star database layout. This allows for more sophisticated and fast treatment of massive catalogs.
* Enabled very fast search of close-to-viewer deep sky objects.
* Implemented brightness corrections involving the angle between 1-2 surface
  normals and the viewing angle, such that the brightness distribution
  gets ~ uniform  for all galaxy orientations and Hubble types. This also
  avoids excessive, unnatural brightness effects in edge-on views.
* Galaxies get brighter with decreasing observer distance according to
  realistic human eye sensitivity profile.
* Brightness display optionally coupled with Automag scheme.
* Enabled very fast picking of deep sky objects.
* Placed galaxy templates in 'models/' directory.
* Added various crucial fixes in galaxy.cpp,
   - factor 2 was missing in the 'size' definition via the radius such that
     distances among DSO's were grossly incorrect;
   - fixed correct ordering of (non-commuting) operations in matrix m.
     This gave incorrect galaxy orientations;
   - To save space and to improve display: generate neat spherical E0
     template from S0 disk template via rescaling by (1.0f, 3.8f, 1.0f);
   - fixed wrong x,y alignment of elliptical rescaling.
* Added code to ease compilation with newer Xcode versions (Macintosh).
* Updated src/celengine/Makefile.am for Linux building. 
* Introduced a new cel function => renderflags {set "nebulae"}.
* Reduced the default value of 'faintestAutoMag45deg' from 8.5 to 7.0.
* Fixed the visibility of the Milky Way during day-time and the abrupt
  appearance or disappearance of galaxies near the day-night border.
* Enabled "geosynchronous Follow" (key 'Y') also for selected DSO's
  (yet it does not seem to be very useful...).
* Moved render flag check in the code such that labels can be drawn even if
  e.g. renderGalaxy flag is turned off.
* Suppressed apparent magnitude display for galaxy add-ons, lacking
  specification of an absolute magnitude (absMag) input value.
* Deleted various source code files that became superfluous.
* Improved comet display. Introduced a neat scheme implementing comet tail
  fading (between 4 and 6 AU for Sol). Systems with several suns and
  luminosities different from the solar one are accounted for. 
* Implemented a new, simple scheme avoiding overcrowded galaxy labels.  
  Their "importance"  is sorted according to apparent magnitude! Thus the
  labels of the brightest galaxies pop up first upon zooming in... 
* Fixes/workarounds for OpenGL 2.0 render paths on both nVidia and ATI cards.


1.4.1
* Windows: Added time zone selection to set time dialog
* Windows: Fixed hard to read text in set time dialog (bug was only present for
  certain Windows shell appearance settings.)
* Changed maximum number of eclipse shadows in OpenGL 2.0 path from two to
  three; if max is exceeded, clamp to three rather than not rendering the
  shadows at all.
* Corrected a bad calculation in ring shadow shaders that caused ring shadows
  to be drawn in the wrong place.
* Windows: Fixed the minimum feature size slider in the locations dialog so it
  updates in response to all the standard controls.
* Added a correct InfoURL for the Moon
* Windows: added splash screen with a progress indicator
* KDE: fixed some AMD64 bugs
* GTK: added splash screen with a progress indicator
* GTK: Added configure options to enable or disable Cairo support for splash
* Corrected a local flashing of the Milky Way brightness.
* Now the distance to the galaxy center is displayed, if the observer is
  located inside the galaxy (Milky Way...).
* Eliminated various incorrect Hubble type acronyms in deepsky.dsc that had
  penetrated the PERL filter.
* Add the corrected PERL script deepsky.pl.     
* Mac: Universal binary - runs natively on Intel and PPC
* Mac: OpenGL 2.0 render path should now work on many configurations
  (requires OS X 10.4.3 or later)
* Mac: Offer option to disable vertex programs automatically when ATI Radeon
  9200 renderer is detected (avoids hard crash)
* Mac: Progress message and version number displayed on splash screen
* Mac: Couple of French translation fixes
* Mac: Changed wording of "Subtract Light Travel Delay" menu item to
  "Add/Subtract Light Travel Delay" to more accurately reflect its function
* Mac: More sensible default values for preferences
* Mac: Bug fixes to favorites, InfoURL handling
* Mac: Full screen mode pauses when various panels are shown
* Mac: Fixed crash when LANG or LC environment variables are set
* Mac: Added bona fide English and French help menu
* Mac: Cleaned up README in general
* Added Phoebe textures in medres and lores directories from recent published 
  Cyclops cylindrical maps
* Updated  Titan and Iapetus textures in lores directory
* Windows: save and restore the last used GL render path
* Removed the GeForce FX render path; GLSL path is preferred
* Added lunar elevation map, using Clementine laser altimeter data, merged
  in the polar regions, with topographic data  from Clementine 750 nm
  oblique and nadir images.
* KDE: Reverted mouse wheel action to be compatible with the other interfaces.
* KDE: New configurable splash screen
    (http://celestia.teyssier.org/splash_spec.html)
* Updated/added Tethys textures in lores, medres and hires directories. 
* Added locations on Phoebe in satmoons2.ssc, as extracted from USGS/IAU
  official data.
* Added Mesh for Phoebe texture.      
* Updated Iapetus texture.
* Moved locations files from extras into data directory for inclusion in
  standard package.
* Fixed bug where displayed time scale differed from actual time scale after
  clicking a cel URL.
* Removed several files from installation on Linux and MacOS, saving ~5M
  compressed.
