problem with the constellation Hydra

[gironde]

The name of the constellation Hydra appears outside its boundaries, within the borders of the constellation Crater. Is there a way to move it? In which file should you intervene? (Celestia 1.6.1 and 1.6.2.2)

In the picture, the marked pulsar is in Hydra but we can see that the name of the constellation is inside Crater

[SevenSpheres]

On my end Hydra's label is within its boundaries (although part of the constellation lines do cross over into Crater for some reason). Are you using the default asterisms.dat and boundaries.dat?

Also, try my pulsar catalog. It's up to date and doesn't use fake HIP numbers.

[ajtribick]

although part of the constellation lines do cross over into Crater for some reason

As far as I'm aware, the Celestia asterisms are based on the IAU/Sky&Telescope ones. Their diagram for Hydra draws the constellation line through Alpha and Beta Crateris.

[gironde]

here is the header of my asterism.dat file :

Code: Select all

#  =================================================
#  asterisns.dat
#  Ханс Аугусто Рей. Звезды. Новые очертанния старых созвездий.
#  Очертания созвездий Алана МакРоберта (Alan MacRobert) на основе идей Рея. Астрономический журнал "Sky & Telescope
#  Перерисовка очертаний Лыгин Геннадий (aka Croc). Редакция от 12.06.2016

# Hans Augusto Rey. Stars. New outlines of the old constellations.
# Alan MacRobert constellation outlines based on Ray's ideas. Astronomical magazine "Sky & Telescope
# Redrawing the outlines of Lygin Gennady (aka Croc). Edition of 12.06.2016
#  =================================================

my boundaries.dat file has no header

I put the 2 files delivered with celestia 1.6.2.2, the result is the same

[SevenSpheres]

here is the header of my asterism.dat file :

That's not the default asterisms.dat. Did you try the default file?

asterisms.zip

(3.33 KiB) Downloaded 260 times

[gironde]

With your asterisms.dat file

the Hydra label is still positioned outside the boundaries of the constellation. I don't think it's asterisms.dat that positions the label. He just draws the stylized constellations. The boundaries are drawn by boundaries.dat. Is the label also positioned by this file?

I have recovered atnf_pulsar 1.66, thanks

[SevenSpheres]

the Hydra label is still positioned outside the boundaries of the constellation. I don't think it's asterisms.dat that positions the label. He just draws the stylized constellations. The boundaries are drawn by boundaries.dat. Is the label also positioned by this file?

Corvus still looks different in your screenshot than in mine; your Celestia may still be reading the custom asterisms.dat. I don't think anyone has modified boundaries.dat, but here's the default version anyway:

boundaries.zip

(131.58 KiB) Downloaded 221 times

[ajtribick]

Looking at render.cpp, the constellation label is positioned at the average position of the first chain of the constellation diagram. For the default file in 1.6.x, this would be the chain consisting of "Gamma Hya", "Beta Hya" and "Xi Hya".

Maybe there's a problem with your asterisms.dat file (or starnames.dat, if the relevant names haven't been defined)

[gironde]

since the beginning of the evening, I have been killing myself to make the modifications in the wrong celestia folder. (I have 2 installations). Now that I understand this, SevenSpheres files are working fine.

Thank you all for your help