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(⬤ᴥ⬤)@lemmy.blahaj.zone to 196@lemmy.blahaj.zone ·
edit-2
9 months ago

2d trulesformations

lemmy.blahaj.zone

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2d trulesformations

lemmy.blahaj.zone

(⬤ᴥ⬤)@lemmy.blahaj.zone to 196@lemmy.blahaj.zone ·
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9 months ago
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  • Ashelyn@lemmy.blahaj.zone
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    9 months ago

    The scaled down rectangle should be narrower; it’s not scaled in this diagram, it’s squished.

    (Yes I know you can ‘scale’ objects on one axis but that’s usually not how it’s taught on an introductory level. Standard scaling assumes object similarity, which is not present in the diagram’s ‘scaled’ rectangle.)

    • Peppycito@sh.itjust.works
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      9 months ago

      This is some quality pedantry.

    • woodgen@lemm.ee
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      9 months ago

      Scaling in 2D has 2 parameters, X and Y, in the example X was at 1 while Y was below 1. You are referring to a subset of scaling transformation where X = Y and the aspect ratio is kept.

      • Ashelyn@lemmy.blahaj.zone
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        9 months ago

        Yes, and introductory geometry courses teach students how to do uniform scaling far before they teach them axis-based because it’s better illustrative of the concepts of similarity and congruence

      • shundi82@sh.itjust.works
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        9 months ago

        And what about the arrow?

        It’s pointing down diagonally, which - at least to me (and for pretty much any GUI I can think of) - indicates, that it should be affecting both axes.

        Then again, that whole illustration isn’t all that great to begin with. So who knows, what that arrow is supposed to signify…

    • Gobbel2000@programming.dev
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      9 months ago

      No, I wod say scaling is any diagonal matrix and thus even includes mirroring.

      • Ashelyn@lemmy.blahaj.zone
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        9 months ago

        Cool, now explain that to a class of 7th graders for me

        edit: raised grade, it may been set a low but it varies. I think most kids start to learn this stuff in/around middle school

        edit 2: also mirrored objects are generally considered similar so that’s fine

    • chad@sh.itjust.works
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      9 months ago

      Ackchuawually, this example depicts a squish and a translation. A true scaling would have the scaling being done in place, resulting in an overlayed and smaller rectangle.

    • germanatlas@lemmy.blahaj.zone
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      9 months ago

      Damnit, I wanted to say that

  • aeronmelon@lemmy.world
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    9 months ago

    I’m at a loss.

    • lugal@sopuli.xyz
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      9 months ago

      I honestly needed this comment to get it

  • spankinspinach@sh.itjust.works
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    9 months ago

    For the first time, I caught loss before loss was pointed out to me 😅

    • MHanak@lemmy.world
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      9 months ago

    • tyler@programming.dev
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      9 months ago

      Same lol. I hate this stupid meme, but I felt better about recognizing it in the wild.

  • 10_0@lemmy.ml
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    7 months ago

    deleted by creator

  • xantoxis@lemmy.world
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    9 months ago

    In spring, a man plants a tree.
    In summer, he plants another.
    In the fall, they stood together.
    In winter, one fell.

  • alien@lemm.ee
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    9 months ago

    IS THAT LOSS?!!

  • someguy3@lemmy.world
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    9 months ago

    Rotation isn’t even rotation which implies rotating around a point on that rectangle. That’s rotation and translation. Such a loss.

    • LMagicalus@discuss.tchncs.de
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      4 months ago

      deleted by creator

    • needanke@feddit.org
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      9 months ago

      Scaling does not include translation either yet it does here by your logic.

  • kittenzrulz123@lemmy.blahaj.zone
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    9 months ago

    :.|:;

  • brognak@lemm.ee
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    9 months ago

    I’m a simple man, I see a Loss meme and I down vote. Shit hasn’t been funny for over a decade, just more hurr durr dumb shit.

    • Peppycito@sh.itjust.works
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      9 months ago

      Your loss.

    • 10_0@lemmy.ml
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      7 months ago

      deleted by creator

    • Klear@lemmy.world
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      9 months ago

      Your loss.

    • shneancy@lemmy.world
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      9 months ago

      Your loss.

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