[SOLVED!] coordinate-handedness confusion

RE: coordinate-handedness confusion
(2021-08-28, 12:31)KristyB Wrote: What coordinate system do lDraw parts ACTUALLY use? The documentation *says* "Right handed with -y up", but shows a picture of a left-handed -y up coordinate axis.

Further - how would I go about translating the matrix to a left-handed +y-up format? I am trying to read ldr files inside of UE4, and the typical method of flopping the y/z coords and negating x/y/z is not working.

It is right handed, to get the y up it only rotates 180 degrees around x.

the picture might be confusing because it shows an arrow pointing up labeled -Y (if it was left handed it would be labeled just Y)
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RE: coordinate-handedness confusion - by Roland Melkert - 2021-08-28, 16:20

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