#133 xyz OrbitFrame referenced to path, not Center

[Selden Ball]

When an OrbitFrame is used to position an XYZ trajectory, the trajectory is positioned relative to the object's path. It should be positioned relative to the OrbitFrame's Center.

An Addon demonstrating this problem is available at
http://www.lns.cornell.edu/~seb/celestia/files/ssb_issues.zip (4KB)

[Chris Laurel]

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I think that this is exactly the same bug as 1754480:
http://sourceforge.net/tracker/index.php?func=detail&aid=1754480&group_id=21302&atid=121302

The problem occurs when translating between reference frames centered on different stars (which internally is what the SSB and Sun are.)

[Selden Ball]

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I know you're right about it being the same one.
Sorry: I couldn't find it when I looked and thought I hadn't submitted
it to Tracker.

I'm not sure what you mean by "the problem". Do you think that the two SSC OrbitFrames actually should work, producing different orbits (my preference),
or that one of the constructs should be considered invalid and Celestia should complain about it?

[Chris Laurel]

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The two SSC OrbitFrames should both work and produce two different orbits.

[Selden Ball]

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The patch recently posted to the developers' mailing list does indeed seem to correct for this problem. I'll rashly assume the code will be submitted to cvs in the near future. ;)

s.