Spacecrafts for Celestia

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Goofy
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Post #561by Goofy » 12.08.2018, 17:47

[quote=gironde]For those who want this modification it is enough to edit the cmod file in cmodview, to select the zone concerned and to modify the shade of color....[/quote]

Hi Gironde.
Sorry, but I don't understand if you like or not that I and some other people here are trying to give a little help to you 3D gurus, in order to have your big, difficult and very appreciated addition to Celestia of many missing spacecraft, the most alike the real thing.
In your message, I understand:

1- This is what has been done;
2- it's OK as it is;
3- if you want something else do it yourself.

I don't have cmodview, neither any 3D software, and even more I don't want to start now to learn 3D modelling, I'm too old, but I can see discrepancies and try to suggest (I repeat, "suggest") how to solve them. :smoke:
If this is not appreciated, never mind, I'll use my time for something else, and will do what most of people here are doing... nothing else than passively waiting for new things done by you and other people like you, most of them well done, but some not so good!
Just clarify, to avoid misunderstandings and waste of time, please.
Thank you.
Bye
Goofy :smile:
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gironde M
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Post #562by gironde » 12.08.2018, 22:06

Goofy,

Online translators are not always up to the mark and distort the meaning of words.

Of course, I appreciated your message on the nuances of color. :smile:

What I wanted to explain is that you can not do a version for every nuance. But if you want a particular hue, post a jpeg file of the hue you want and I will make the adaptation in the cmod file.


All remarks are welcome when they are constructive. :smile:


the cmodview program can be downloaded from https://celestia.space/
tab Add-Ons / Utilities / Others.
to change the colors we are talking about, it's pretty simple.
for textures it's more complex.
the program does not change the shape of the object.


Please continue to post messages, it always concerns us.


:smile: :hi:

Added after 8 minutes 41 seconds:
Goofy,

here is an example of changing the pink hue


:smile:
Attachments
exemple jwst.jpg

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Goofy
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Post #563by Goofy » 12.08.2018, 22:52

OK Gironde, I understand, it was a misunderstanding due to the fact that English is not our Native language, so all is OK.
Bye and nice 3Ds!

Goofy :smile:
"Something is always better than nothing!"
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gironde M
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Post #564by gironde » 13.08.2018, 08:46

Goofy and others

cmodview does not allow to modify the structure of a 3D model but only to modify the rendering of the colors.

In the attached image, I tried to explain its operation, although I did not assimilate everything on the textures.
Unlike the 3dstocmod program, cmodview accepts long names for texture files.

The cmodview program was made only for Celestia, so it uses its file structure. The 3D model must be in a 'models' folder and the textures in a 'textures / medres' folder.


The 3dstocmod program turns a .3ds file into a .cmod file. But as he misinterprets some properties of the 3ds, it is necessary to resume manually. At first I recover a cmod ascii to correct imperfections.

3dstocmod limits the size of the texture file name to 8 characters so you have to retype them manually. Properties like 'opacity' take erroneous values ​​which I correct by putting them back to 1. The .cmod ascii file is editable in any good text editor. (as Notepad ++).

Once the cmod file is passed through cmodview, it is always written in binary cmod.


A cmod file can not be converted back to 3ds (to my knowledge). It's a dead end. So I advise you to keep the original 3ds file.
A 3ds file can always be used in a 3D program (Blender, Meshlab, ...) to modify the structure of 3D vectors.

Cmod is a format unique to Celestia.


:hi:
Attachments
cmodview explications.jpg

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jujuapapa
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Post #565by jujuapapa » 13.08.2018, 11:49

gironde wrote:...
A cmod file can not be converted back to 3ds (to my knowledge). It's a dead end.
...

False !
You have several softwares which realize the updates like unwrap3d, anim8or, blender, ... :wink:
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Post #566by CM1215 » 13.08.2018, 13:22

gironde wrote:A cmod file can not be converted back to 3ds (to my knowledge). It's a dead end.
There is only one program I know of that can convert from a CMOD file to other model files: a program called 3D Object Converter.

The only problem is that it costs 50 USD for the registered version, and the program is made absolutely unusable unless it is registered, because if it is an unregistered version, it will delete every 5th polygon from the mesh upon export to a new format.
CM1215: Celestial master in learning.

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gironde M
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Post #567by gironde » 13.08.2018, 14:42

CM1215, thank for information

in discussing, we advance!


:hi:

Added after 7 minutes 2 seconds:
hello,

for ACE satellite, I search an method for convert .xyz GSE to .xyz Celestia's Earth Geocenter

ephemeris available on Caltech website :

GSE - Geocentric Solar Ecliptic
X = Earth-Sun Line (~~ opposite direction of axis X of Earth)
(Y = 90° of X)
Z = Ecliptic North Pole

J2000 GCI
Geocentric inertial reference frame using the Julian Epoch of Jan. 1, 2000.
At the Julian Epoch,
X = First point of Aries (Vernal Equinox, i.e. from Earth to the Sun in the first day of Spring)
(Y = 90° of X)
Z = Earth's mean spin axis


:hi:

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gironde M
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Post #568by gironde » 14.08.2018, 11:22

jujuapapa,

I have never managed to open a cmod with the software you quote.

:hi:

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jujuapapa
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Post #569by jujuapapa » 15.08.2018, 04:28

gironde wrote:jujuapapa,
I have never managed to open a cmod with the software you quote.
:hi:
All is possible with good plugins. :biggrin:
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CM1215 M
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Post #570by CM1215 » 15.08.2018, 12:55

jujuapapa wrote:All is possible with good plugins. :biggrin:

jujuapapa, there is no plugin for Blender or Anim8or that allows you to directly open CMOD files. As for this Unwrap3D that you speak of, I don't know for sure, but I'm doubtful.

However, there are plugins for Blender and Anim8or that allow you to export models of other formats to CMOD format, but these don't allow you to directly open CMOD files.
CM1215: Celestial master in learning.

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toutatis
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Post #571by toutatis » 16.08.2018, 05:32

PSP....
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capture-20180816-112218.jpg

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SpaceFanatic64
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Spacecrafts for Celestia

Post #572by SpaceFanatic64 » 16.08.2018, 05:36

Hello everyone! I'm new to the forums. Toutatis, nice work with the Parker Solar Probe! However, I will request for addons of certain spacecraft since I have Blender installed, but my antivirus blocks cmodview. :sad:

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gironde M
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Post #573by gironde » 16.08.2018, 11:05

as usual, jujuapapa announces possibilities but never goes further in the explanations.

Added after 2 minutes 38 seconds:
it's like the cows that pack Milka chocolate. It's in his head and not elsewhere.

Added after 1 minute 35 seconds:
Toutatis,

we are all looking forward to Parker Solar Probe :smile:

:clap: :clap:

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toutatis
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Post #574by toutatis » 16.08.2018, 14:29

Toutatis,

we are all looking forward to Parker Solar Probe :smile:

Thanks Gironde... PSP add-on will be ready soon, but I still think about texture of PSP model... need more photos of this spacecraft....

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Goofy
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Post #575by Goofy » 16.08.2018, 16:31

Hi Gironde.
Probably you have already seen, but here

http://parkersolarprobe.jhuapl.edu/index.php#spacecraft

are PSP Anti-Ram Facing View and Ram Facing View that look very detailed and realistic.
And here

http://parkersolarprobe.jhuapl.edu/Multimedia/Images.php#photos

you can find both artist's renderings and images of the real thing.
Hope this hrelps to solve your doubts.
Bye
Goofy :smile:
"Something is always better than nothing!"
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gironde M
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Post #576by gironde » 16.08.2018, 19:42

Goofy, it's nice to send me this last messgae but it's Toutatis who realizes Parker Solar Probe. But that concerns me all the same and I will go see your links

:smile:

Added after 6 minutes 40 seconds:
the PSP surface at the shield seems to be just white

Added after 8 minutes 39 seconds:
Many (real) photos on these sites

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Goofy
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Post #577by Goofy » 16.08.2018, 21:34

Hi Gironde, sorry for wrong addressing. :hi:
Anyway hope that Toutatis too will find something useful there.
Bye
Goofy :smile:
"Something is always better than nothing!"
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SpaceFanatic64
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Post #578by SpaceFanatic64 » 16.08.2018, 23:48

Hello. I want to request for the spacecraft RHESSI. It would be fine if gironde or toutatis created an addon for this obscure spacecraft. I found the 3D model from the NASA 3D Resource here: https://nasa3d.arc.nasa.gov/detail/HESSI-RHESSI

A complete list of orbital parameters from Wikipedia is here: https://en.wikipedia.org/wiki/Reuven_Ramaty_High_Energy_Solar_Spectroscopic_Imager

Regards, SpaceFanatic64. :smile:

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toutatis
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Post #579by toutatis » 17.08.2018, 01:15

Anyway hope that Toutatis too will find something useful there.

Yes Goofy... Thanks!

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jujuapapa
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Post #580by jujuapapa » 17.08.2018, 03:21

gironde wrote:as usual, jujuapapa announces possibilities but never goes further in the explanations.
it's like the cows that pack Milka chocolate. It's in his head and not elsewhere.

@gironde : Beaucoup de mauvaise foi et pas grand chose dans le cigare ! :clap:

plugin_anim8or.jpg


plugin_unwrap.jpg


Pour blender, j'ai désinstallé la version 2.7 et j'attends la prochaine (2.8) mais j'ai toujours le plugin en réserve... :wink:

@ CM1215 : speak without knowless is a federal crime ! :clap: :insane:
PC : Intel Core i9-9900K (3.6 GHz) , Chipset Z390 Exp, RAM 32 Go DDR4 3000 Mhz, SSD M.2 512 Go + HDD 3 To, MSI GeForce RTX 2080 8Go

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