• yopyop@feddit.de
    1·
    1 year ago

    I work in 3D metrology and the consensus is right handed and Z up. Had no idea left handed existed!

    • heeplr@feddit.de
      1·
      1 year ago

      How does projection work in your field? X, Y, Z get converted to X, Z and 2D screen planars have no Y axis?

      Who invented this, why did she do it and where to send my official letter of complaint?

      • Pelicanen@sopuli.xyz
        1·
        1 year ago

        I thought right-hand rule with Z up as thumb was standard in science? You usually project on the xy-plane, for example when calculating the distance to objects on a flat surface.

        • heeplr@feddit.de
          1·
          1 year ago

          I only know thumb = motion/current but now since you say, it’s clear: people used x/y for 2D logically but the 2D plane used to be paper. which is parallel to the earth surface (usually). Computer screens are perpendicular so Y points up, not away from you.

          So this makes sense with paper, TIL. With computers, Z traditionally means depth.

  • JATtho@sopuli.xyz
    1·
    1 year ago

    It gets more cursed the more you look at it:

    • you have to convert the coordinate axes (swap z,x,y)
    • then you find out the right/left handed is flipped
    • now your brain melts if you even try think how to solve this with transformation/rotation, what ever.