New galaxy model, full of stars !

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Cham M
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Cham M
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#1by Cham » 30.09.2011, 03:35

Here's a - fictious - ring shaped galaxy with arms, full of dust and Orion-like nebulae. The stars are mainly concentrated in the arms (the stars distribution fits the nebula model). It's not finished yet, but the rendering is already great.
galaxy1.jpg
galaxy2.jpg
"Well! I've often seen a cat without a grin", thought Alice; "but a grin without a cat! It's the most curious thing I ever saw in all my life!"

Cham M
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Re: New galaxy model, full of stars !

#2by Cham » 30.09.2011, 03:46

More views, with Magn pushed to the max :

galac1.jpg
galac2.jpg


A view from the inside :
galact3.jpg


I'm not sure yet of what to do, for the central core. Maybe a simple yellowish blob full of stars...
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bh
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Re: New galaxy model, full of stars !

#3by bh » 30.09.2011, 07:30

That's impressive! FPS?
regards...bh.

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Re: New galaxy model, full of stars !

#4by Cham » 30.09.2011, 12:31

bh wrote:FPS?

Well, on my 2009 Mac mini, it's a bit slow (it depends on the view. About 10 to 15 FPS in the worst case). On my 2010 13" MacBook Pro, it's much higher.
"Well! I've often seen a cat without a grin", thought Alice; "but a grin without a cat! It's the most curious thing I ever saw in all my life!"

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Re: New galaxy model, full of stars !

#5by bh » 30.09.2011, 12:53

That's super... prob too much for my mini... it's a 2006 and it's a bit tired. I get around 5FPS in Earth orbit!
regards...bh.

Cham M
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Re: New galaxy model, full of stars !

#6by Cham » 30.09.2011, 13:03

Two more views from the inside (Magnitude isn't pushed to the max here). It's really fun to move inside this thing, especially when you slip in/out of the arms.
inside1.jpg
inside2.jpg
"Well! I've often seen a cat without a grin", thought Alice; "but a grin without a cat! It's the most curious thing I ever saw in all my life!"

Cham M
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Re: New galaxy model, full of stars !

#7by Cham » 01.10.2011, 00:38

More stars...

There's a total of 90 000 stars in the ring galaxy (60 000 Main Sequence stars + 30 000 higher luminosity classes). The view is superb in Celestia, and the frame rate is pretty high, despite the scene complexity.

RU1.jpg
RU2.jpg


Super massive black hole in the middle. A central bulge is yet to come with a nebula.
"Well! I've often seen a cat without a grin", thought Alice; "but a grin without a cat! It's the most curious thing I ever saw in all my life!"

Cham M
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Re: New galaxy model, full of stars !

#8by Cham » 01.10.2011, 01:19

There's a young star field in there ! :)

RU6.jpg
RU7.jpg


On average, the distance between adjacent stars in this galaxy is roughly 100 LY.
"Well! I've often seen a cat without a grin", thought Alice; "but a grin without a cat! It's the most curious thing I ever saw in all my life!"

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Re: New galaxy model, full of stars !

#9by Reiko » 01.10.2011, 05:16

This is fantastic! I can not wait to see the finished product. :D :D

Cham M
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Re: New galaxy model, full of stars !

#10by Cham » 01.10.2011, 13:30

This is my source of inspiration for that annular galaxy :

http://apod.nasa.gov/apod/ap020909.html

hoag_hst_big.jpg
"Well! I've often seen a cat without a grin", thought Alice; "but a grin without a cat! It's the most curious thing I ever saw in all my life!"

Cham M
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Re: New galaxy model, full of stars !

#11by Cham » 01.10.2011, 15:12

I'm adding more details and colors. The frame rate is decreasing a bit, but it's still fine on my 2009 Mac mini.

Some views to compare with the pictures posted above (click the images below for a large 1680 X 1050 view) :

Image

Image

Image

Image

Image

Image

Image

If only Chris was implementing the bug fix I was asking since a long time, about the nebulae sprites rendering at very large distance (white dots)... :cry: This would allow a massive production of sprites based nebulae in Celestia !
"Well! I've often seen a cat without a grin", thought Alice; "but a grin without a cat! It's the most curious thing I ever saw in all my life!"

Cham M
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Re: New galaxy model, full of stars !

#12by Cham » 02.10.2011, 03:30

I made the ring galaxy as a multi-layers object that can be toggled with a CELX script. This way, we can have several rendering of the same galaxy.

Here's the default representation, using a 256 X 256 custom PNG template (default rendering style in Celestia) :
RingUniverse.png


Unfortunately, this template needs to be placed in the base models folder, and isn't recognised by Celestia if it's placed in the extras folder.

Here's a preview of the default rendering in Celestia. The arms fits perfectly well with the stars distribution :
default.jpg


Here's the default template superposed with a part of the sprites model (the other part isn't shown here since we can't show more than three pictures in a message, and I'm too lazy to use my personnal server space :roll: ) :
superposed.jpg


I didn't made the central core yet.
"Well! I've often seen a cat without a grin", thought Alice; "but a grin without a cat! It's the most curious thing I ever saw in all my life!"

Cham M
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Re: New galaxy model, full of stars !

#13by Cham » 02.10.2011, 17:19

I added the galactic core :
core1.jpg
core2.jpg
core3.jpg


EDIT : I released the addon there (download link) :

viewtopic.php?f=23&t=16649&p=128069#p128069
"Well! I've often seen a cat without a grin", thought Alice; "but a grin without a cat! It's the most curious thing I ever saw in all my life!"


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