Hi all,
in this thread, I shall report on the status of my work on
10000+ galaxies from Steinicke's NGC/IC precision
catalog. For the time being the displays are based on Toti's
galaxy patch with an increasing number of modifications
by myself.
-- I now have derived the general and exact
transformations that automatically produce the correct
orientations of all 10000+ galaxies from a few catalog
parameters (d/D and position angle)!
-- for elliptical galaxies, I assumed a spheroidal
shape (rather than the circular pancake shape in case
of spirals) with dimensions according to the elliptical
subclass number int(10*(1-d/D)). This procedure emerged
in discussions with Selden.
-- I am desperately waiting for Toti's programme code with
which he generated the various galaxy templates, since a
number of them have flaws: like incorrect orientation of the
bars for SBx galaxies or a mirrored sense of rotation of
the spiral arms.
-- the appearance of elliptical galaxies can be dramatically
improved (so don't worry)
-- the next 3 comparisons with actual DSS survey
photos illustrate the high precision in orientation and
shape that my transformations have reached already!
I shall only report back in the forum once Chris
has managed to restore a decent forum performance,
since otherwise this costs too much time for me.
Sorry.
Bye Fridger
10000+ galaxies, Status report
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Topic authort00fri
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10000+ galaxies, Status report
Last edited by t00fri on 02.06.2005, 22:34, edited 3 times in total.
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Excellent work Fridger,
The orientation of the galaxies in Celestia seem to match the galaxies in the real pictures very well.....except for
...yes they do seem to stand out.
I hope if the coding of the wrong orientation to the spiral arms, and to the centre bar of SBx galaxies is solved while the forum is still acting up, then we may possibly hear from you then !?.
cheers,
TERRIER
The orientation of the galaxies in Celestia seem to match the galaxies in the real pictures very well.....except for
ElChristou wrote:I presume the 2 smaller of second pics are not part of those 10000+ as their orientation seems different...
...yes they do seem to stand out.
I hope if the coding of the wrong orientation to the spiral arms, and to the centre bar of SBx galaxies is solved while the forum is still acting up, then we may possibly hear from you then !?.
cheers,
TERRIER
1.6.0:AMDAth1.2GHz 1GbDDR266:Ge6200 256mbDDR250:WinXP-SP3:1280x1024x32FS:v196.21@AA4x:AF16x:IS=HQ:T.Buff=ON Earth16Kdds@15KkmArctic2000AD:FOV1:SPEC L5dds:NORM L5dxt5:CLOUD L5dds:
NIGHT L5dds:MOON L4dds:GALXY ON:MAG 15.2-SAP:TIME 1000x:RP=OGL2:10.3FPS
NIGHT L5dds:MOON L4dds:GALXY ON:MAG 15.2-SAP:TIME 1000x:RP=OGL2:10.3FPS
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Topic authort00fri
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ElChristou wrote:Fantastic...
I presume the 2 smaller of second pics are not part of those 10000+ as their orientation seems different...
What is the next work on this? colors?
All pictures are from the 10000+ sample. In the second picture (from the top), there is precisely two (small) galaxies the orientation of which is incorrect due to a flaw in Toti's galaxy templates. Everything else looks /pretty/ similar to the photos, except that the rotation sense of one spiral in the second photo is mirrored again because of a flaw in the galaxy template.
I first want to improve (rewrite) the code on elliptical galaxies and add other code improvements. Then comes color!
Bye Fridger
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This is depresing. Not the pictures or the add-on. Just the fact I had to wait ten minutes to see this thread.
Fridger this is something I am going to be keeping an eye on. Things are looking great. Please keep up the work on this as I feel it is probably one of the best futures add-ons for Celestia.
Don. Edwards
Fridger this is something I am going to be keeping an eye on. Things are looking great. Please keep up the work on this as I feel it is probably one of the best futures add-ons for Celestia.
Don. Edwards
I am officially a retired member.
I might answer a PM or a post if its relevant to something.
Ah, never say never!!
Past texture releases, Hmm let me think about it
Thanks for your understanding.
I might answer a PM or a post if its relevant to something.
Ah, never say never!!
Past texture releases, Hmm let me think about it
Thanks for your understanding.