Gliese 581 c Texture

[bh]

Great Don... my first add on in OSX!

[ElChristou]

Yep, I also be happy to have a look!

[brunetto_64]

Count me in too!!!

brunetto64@gmail.com

[fsgregs]

Ok, ok, I will zip it up and post it with a link in here. watch for it.

Don:

Have you been able to make Gliese 581 available yet? Your finished product looks just great. I am anxious to download it.



Frank

[Don. Edwards]

Oops, I kind of forgot about this. I will get it zipped and uploaded for everyone ASAP.

Don. Edwards

[Don. Edwards]

Ok here we go!

This add-on was originally made by Frank Gregorio, I added some features from Runar Thorvaldsen "Portrait of Our Sun" add-on and created the new red dwarf texture myself. The actual texture is a cloudmap that floats over the default red dwarf texture used in Celestia. I have included 2 .ssc files with this. One has the flares options and the other doesn't. To use the .ssc without the flares you will have rename it from .ssc1 to .ssc. This is considered a beta add-on, meaning there is much room for improvement, namely I need to rework the Red Dwarf texture a little more so it doesn't appear so stretched at the equatorial zones. Again this was just made as a proof of concept. If anyone wished to continue to work or tweak it please be my guest, just be sure you share your work with everyone and post your additions.

Thanks and enjoy!

DOWNLOAD HERE

Don. Edwards

[Chuft-Captain]

TWEAK 1:

This is not really an addition or enhancement, just a better way (IMO) of organising the SSC files which will give more flexibility in enabling/disabling the features.

Separate the texture code from the flares code as follows:
1. Rename Gliese_581.ssc to Gliese_581_texture.ssc
2. Rename Gliese_581.ssc1 to Gliese_581_flares.ssc
3. Remove the flares code from the first file and paste it into Gliese_581_flares.ssc (replacing existing contents).

CC

[Don. Edwards]

Chuft,

Wouldn't be easir to simply rename the appriate files versus coping and pasting into the other?

Or simply make copies of .ssc files and give them the name you want.

Don

[fsgregs]

Just a quick note:

The radius of gliese 581 is wrong. We have it too large. It should be about 120000 km, not 570000. Don and I are fixing it. It is a bit complicated in that the flare textures have to be carefully resized. We also have to make the overlay planet larger than the actual star so that it covers the existing star. I have asked Runar to help us redo the radii. We'll issue a revised add-on in the next few days.

Frank

[Chuft-Captain]

Chuft,

Wouldn't be easir to simply rename the appriate files versus coping and pasting into the other?

Or simply make copies of .ssc files and give them the name you want.

Don

Sorry, I didn't explain myself very well Don.
I think you assumed that people will use one version or the other (flares or no flares) and never change it, however what I was suggesting is a way to make it easier for a user to enable or disable flares whenever they like.

Because each of your files has the same name (when enabled) users would have to disable one and enable the other every time they wanted to switch between the two.

By having the texture in a file by itself, and the flares in it's own file, the texture can be always on, and then to enable/disable flares requires merely enabling or disabling the flares file -- as long as it has a different filename (when enabled) from the texture file.

The names wouldn't have to be what I suggested as long as one file contains ONLY texture definition, and the other one contains ONLY flares definition, and the filenames are distinct...

NOTE: This also means you can have flares only (if you disable the texture file instead of the flares file) -- although this does look rather strange.

PS. I'm not insisting you re-package this my way. It's perfectly OK as it is , and it's simple enough for anyone who wishes to follow my procedure to repackage it themselves. (In fact, it would take them far less time than it's taken me to write this post )

eg.
Gliese_581.ssc (texture):

Code: Select all

"Gliese 581" "Gliese 581"
{
   Texture ""
   Emissive true
   Color [ 1.0 0.8 0.8 ]
   BlendTexture true
   Radius     570000
      Color [ 0.60 0.50 0.50 ]
   SpecularColor [ 0.60 0.50 0.50 ]
   SpecularPower  250.0
   HazeColor [ 0.60 0.50 0.50  ]
   HazeDensity 2.0
      
      EllipticalOrbit {
         Period 1
         SemiMajorAxis 0.00
         Eccentricity 0.00
         Inclination 0.00
}

   Atmosphere {
      Height 1805410

      Lower   [ 0.60 0.40 0.40 ]
      Upper   [ 0.60 0.50 0.50 ]
      Sky   [ 0.60 0.50 0.50 ]
      CloudHeight 0
      CloudSpeed 00
      CloudMap "Gliese-5cover.png"
      }

   Mie 0.001
   MieAsymmetry -2.90
   Rayleigh [ 0.60 0.50 0.50 ]
   MieScaleHeight 12000
   RotationPeriod 9.6
   Albedo         10000.05
}


Gliese_581_flares.ssc:

Code: Select all

"_sunflare1" "Gliese 581"
{
Mesh      "th_placeholder.3ds"
Radius      250000
Emissive   true
Oblateness   0.5

   EllipticalOrbit
      {
      Period      0.0005
      SemiMajorAxis   0.00383
      Inclination   90
      MeanAnomaly   90
      }

   Atmosphere {
      Height      0
      CloudHeight   10
      CloudSpeed   00
      CloudMap   "th_sunflare1.png"
      }

RotationPeriod   0.09
Obliquity   45
}





"_sunflare2" "Gliese 581"
{
Mesh      "th_placeholder.3ds"
Radius      280000
Emissive   true
Oblateness   0.4

   EllipticalOrbit
      {
      Period      0.0005
      SemiMajorAxis   0.003599
      Inclination   180
      MeanAnomaly   90
      }


   Atmosphere {
      Height      0
      CloudHeight   100
      CloudSpeed   00
      CloudMap   "th_sunflare2.png"
      }

RotationPeriod   0.092
Obliquity   25
}





"_sunflare3" "Gliese 581"
{
Mesh      "th_placeholder.3ds"
Radius      210000
Emissive   true
Oblateness   0.4

   EllipticalOrbit
      {
      Period      0.0005
      SemiMajorAxis   0.0041
      Inclination   0
      AscendingNode   90
      MeanAnomaly   45
      }


   Atmosphere {
      Height      0
      CloudHeight   100
      CloudSpeed   00
      CloudMap   "th_sunflare3.png"
      }

RotationPeriod   0.075
Obliquity   225
}






"_sunflare4" "Gliese 581"
{
Mesh      "th_placeholder.3ds"
Radius      180000
Emissive   true
Oblateness   0.7

   EllipticalOrbit
      {
      Period      0.0005
      SemiMajorAxis   0.0045
      Inclination   25
      }

   Atmosphere {
      Height      0
      CloudHeight   70
      CloudSpeed   00
      CloudMap   "th_sunflare4.png"
      }

RotationPeriod   -0.095
Obliquity   90
}






"_sunflare5" "Gliese 581"
{
Mesh      "th_placeholder.3ds"
Radius      250000
Emissive   true
Oblateness   0.2

   EllipticalOrbit
      {
      Period            0.0005
      SemiMajorAxis     0.0044
      Inclination 90
      MeanAnomaly 90
      }

   Atmosphere {
      Height      0
      CloudHeight   100
      CloudSpeed   00
      CloudMap   "th_sunflare5.png"
      }

RotationPeriod   0.07
Obliquity   45
}

"_sunflare6" "Gliese 581"
{
      Mesh   "th_placeholder.3ds"
   Texture "gliesecsurface.jpg"
   Color [ 0.85 0.85 1.0 ]
   SpecularColor [ 0.3 0.3 0.3 ]
   SpecularPower 25.0
   HazeColor [ 0.50 0.7 2.0 ]
   HazeDensity 0.35
   Radius 9500.140  # equatorial
   # Oblateness 0.0034

   NormalMap "gliesecnormap.png"
   # BumpMap "earthbump.*"
   # BumpHeight 4.5

   Atmosphere {
      Height 75
      Lower [ 0.43 0.52 0.65 ]
      Upper [ 0.26 0.47 0.84 ]
      Sky [ 0.40 0.6 1.0 ]
      Sunset [ 1.0 0.6 0.2 ]
      # Sunset [ 0.3 1.0 0.5 ]
      CloudHeight 10
      CloudSpeed 50
      CloudMap "TMC-1.png"

      Mie 0.001
      MieAsymmetry -0.25
      Rayleigh [ 0.001 0.0025 0.006 ]
      MieScaleHeight 12
   }

   EllipticalOrbit {   
      Period            1.0000
      SemiMajorAxis     1.0000
      Eccentricity      0.0167
      Inclination       0.0001
      AscendingNode   348.739
      LongOfPericenter 102.947
           MeanLongitude   100.464
   }

   RotationPeriod   #23.9344694 # 23.93419
   Obliquity        -3.45
   RotationOffset   280.5    # offset at default epoch J2000

   Albedo            0.41
}


[Don. Edwards]

Chuft-Captain,

I get you now, a good idea. As far as I am concerned this is an open add-on. Anyone can do what they wish and add links to the modified work, or give a link to me and I can host it with the original and make a link here. Of course we must keep in mind who made the originals, and the acompaning read-me files need to go along with them in addition to any additional read-me files that get added as it goes on.

Frank, who originaly made the basic add-on, has discovered that the star is acualy the wrong size and he is changiing that himself. This will also mean that the orbit for the flares have to be ajusted as well. He is contacting Runar for instructions on this.

I think I kind of like the idea of making an open project, posting it in its early stages and letting everyone work on it and modify it as time goes by. I very well might do this again in the near future.

Don. Edwards

[Don. Edwards]

Hey Everyone,

I thought I would post a couple of shots of my new texture for Gliese 581, or Red Dwarf stars in general. So have a look and give me some input as to what you all think of it.





Don. Edwards

[bh]

Looks superb Don... great job as usual!

[fsgregs]

Looks great Don. let's go with it.

Just a quick point. In the screenshot, it looks like one of the flares (the left one) is far off the star, perhaps circling an empty point in space. Is that just an artifact of the screenshot, or ...

Frank

[Don. Edwards]

Hey Frank,

Its just an illusion. It is orbiting right, the angle just makes it look the way it is.

Don. Edwards