• t0fr@lemmy.ca
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    2 days ago

    There are clearly more than two. In the top image that z-axis is pointing in the wrong direction.

    • grue@lemmy.world
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      2 days ago

      Z pointing in the other direction is the same as the bottom image, just rotated.

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        2 days ago

        No, the bottom image correctly follows the right hand rule (1,2,3=x, y, z on your thumb and two fingers at right angles), whereas the top one is wrong because it doesn’t. It would be OK if the z axis in the top one pointed towards us. Top one would be a mirror image as well as rotation of the bottom one.

        • grue@lemmy.world
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          2 days ago

          Right, that’s what I said: if Z in the top image were pointing the opposite direction (i.e. if it followed the right hand rule), it would be the same as the bottom image. Rotation is irrelevant; only handedness matters.

          • t0fr@lemmy.ca
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            1 day ago

            I think the comic is trying to illustrate the difference between people who consider Y to be the vertical axis or z to be the vertical axis.

            I think the right hand rule vs left hand rules coordinate systems was a mistake.