OT: mate recons impossible circle is possible

A mate of mine recons those impossible circle gifs are possible otherwise they'd be impossible to draw.... https://66.media.tumblr.com/7caaa46e278e910e9b120c47765851bf/1dc2e160bff82cd1-d5/s1280x1920/16be070d5a2258851d4dc185271111e5f8536af7.gifv
I think not?
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On Sat, 16 May 2020 19:10:51 +0100 (GMT+01:00), Jimk

Then introduce him to the work of M.C. Escher.
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wrote:

+1
--

Chris

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On 16/05/2020 19:04, Mr Sandman wrote:

You could make a static model that looked "right" when viewed from a particular angle. However you would not be able to rotate it (or change your viewpoint)
e.g:
https://laughingsquid.com/m-c-escher-impossible-cube/
--
Cheers,

John.
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On 16/05/20 19:04, Mr Sandman wrote:

As others have pointed out, Escher created the first impossible cube. Other examples here: <https://en.wikipedia.org/wiki/Impossible_object#Notable_examples>
The problem with the impossible circle is that it is carefully designed, like all of these things, to fool the eye. Even if carefully viewed in stop/start motion, or perhaps as individual frames, it is not easy to see why it is impossible.
--

Jeff

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The example linked to at the top of this thread is not a hard one to pick f ault with, in terms of physical plausibility. If you watch a particular par t of it while holding in your mind the notion of a particular orientation o f the object as a whole and axis of spin, at the point when the orientation /spin appears to change, you can actually see a change in the geometry of t he pieces that enforce the apparent change. In other words, it does not mai ntain the illusion of being composed of solid parts that hold a fixed shape .
Bill.
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Argh! My eyes!
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