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FSX Round Earth Math Bug

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Hi Guys,

I'm trying to track down information on the round earth calculation bug in FSX that leads to stuff like generic buildings drifting from their real lat/lon location.

Does anyone have any information on this?

Arno I seem to remember you mentioned something back in 2006, it was fixed in one area before RTM but I think one other area got skipped.
 
Oh I found the information. Math for the round earth was fixed for the airport surface markings but looks like the generic buildings weren't fixed and had the inaccurate round earth math.
 
Hi Dean:

IIUC, there may be multiple "gotchas" involving this FSX / P3D 3D world correction (or non-correction ;)) calculation issue which might involve other mechanisms, as I tried to summarize and link to in this discussion on P3D with Rob Ainscough:

http://www.fsdeveloper.com/forum/threads/emitter-offset.426791/#post-700554


Regarding curious display anomalies of positioning with "Generic" buildings which, IIUC, are created from BGLCompXML source code, I'm wondering if the same quirk may also apply in this scenario that Arno investigated involving Latitude-related 'distortion' (IIUC, heading 'rotation' and NOT warping) of such 3D building objects when used as autogen:

http://www.scenerydesign.org/2014/05/autogen-object-distortion/

http://www.fsdeveloper.com/forum/th...buildings-with-incorrect-orientations.430094/


Hope this might prove pertinent to your current (or subsequent) inquiry. :)

GaryGB
 
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