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Unreal Engine to move to using Y-up
(midwest.social)
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this post was submitted on 06 Jun 2025
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I don't follow why that means I'm wrong.
"Was" here refers to their old Z-Up, left-handed coordinates, where X was forward, Y was right, and Z was up.
You're right that I didn't sufficiently consider the "was" in that sentence. Perhaps there's something I'm missing though, because I haven't seen anything that would suggest X is left. When I put my right hand in the position indicated in the OP, my index finger (Y) points upwards, with my thumb (X) pointing right, making an L shape. My middle finger (z) comes out towards me.
However, most of my experience with coordinate systems is with abstract, mathsy stuff, and I don't have much experience with any of these softwares; there may be something obvious that I'm missing.
You can spin your hand 180° around Y (index / up). Then Z (middle) points away from you, "forward". And X (thumb) will point left.
Thus the "Left-Up-Forward" + Right-handed.