Celestia Forums

1. How do I use the "modify" definition in an .ssc file in the "extras" directory to override the "CustomOrbit" definition for a default object in the "data" directory, such as the sun? I'm looking to make my "Apollo" addon more realistic without having to have the end-user modify a file in the "data" directory.

2. How do I use the "modify" feature to add new names to a pre-existing object?

And is either of this possible?

Celestia ignores invalid custom orbits, so changing its name to something unrecognizable will cause the EllipticalOrbit definition (if one is present) to take effect.
e.g.


(Modifying the orbit of the Sun around the Solar System Barycenter will have no effect on a spacecraft's orbit around the Earth or Moon: they're relative to wherever the Sun happens to be.)

To add new directives to an existing definition, just include them in the Modify statement.

e.g.

I'm having trouble getting the default DEL Tri stars to disappear.

This is what I have right now in the extras directory:

I don't think that Visible works in STC files.

One way to change or replace a cataloged star is to define a new star using that Star's Hipparcos catalog number.

See http://www.lepp.cornell.edu/~seb/celest ... s.html#4.0

Doesn't work for DEL Tri, apparently.

Oh well.

Thank you for your help.