Celestia Forums

I used to have an older version of Celestia that had a file that listed all the HD numbers of stars and permitted additions of self-selected names and I could name stars to my whim and create asterisms with my own names.
I'm trying to create my own asterisms (with the nesest download of Celestia) and some of the stars only have HP or TYC numbers.
Making an asterisms file with those numbers doesn't work...
Help??

~ Alex

My guess is that the asterisms file may be loaded before user stc files are loaded. As a result, it can't draw lines between them

One way around this is to create a CMOD model consisting of lines between Celestia's xyz locations and use it as a DSC Nebula object. An advantage is that you can use whatever colors you want for the lines. Sime disadvantages are that it can't be enabled and disabled while Celestia is running (except by disabling all Nebula objects) and you have to do the spherical trig yourself to convert RA, Dec (or Galactic l2, b2) and distance into appropriate x,y,z vaiues.

I wrote a Fortran program to do this for an Addon that I'm working on, but it is not designed to be "user friendly" if you don't know Fortran. I could provide it if you want. I use the g77 compiler, which is avaiable free as part of Cygwin.

In another thread, Vincent is considering making line drawing availble to Lua coding. This could be another way to do what you want. Let him know if you want it. See http://celestiaproject.net/forum/viewtopic.php?p=82982&82982

Yeah Fortran 77! I wrote my major qualifying project for airfoil shape optimization using genetic algorithms in college with Fortran. Ah the memories.

selden wrote:My guess is that the asterisms file may be loaded before user stc files are loaded. As a result, it can't draw lines between them

I'll check tonight, but if that is really the case, it's very easy to fix.

--Chris

selden wrote:My guess is that the asterisms file may be loaded before user stc files are loaded. As a result, it can't draw lines between them

One way around this is to create a CMOD model consisting of lines between Celestia's xyz locations and use it as a DSC Nebula object....

Thanks!
Don't have the knowledge or time to do all that but thanks.
I'll pop over and give the Lua-person my plea...

~ Alex