A Chair for Escher

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A Chair for Escher

Postby Dave R » Wed Jun 28, 2023 3:16 pm

I did this at the request of someone on one of the woodworking fora I look at.

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Etaoin Shrdlu


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Re: A Chair for Escher

Postby Rich O Brien » Wed Jun 28, 2023 3:24 pm

Looks like an ikea chair you put together without instructions. its hurts my eyes if i look too long
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Re: A Chair for Escher

Postby ntxdave » Wed Jun 28, 2023 3:48 pm

One of the bottom rails and rear leg (the one on the left side) needs to be behind the other rails and legs. Dave, that is not like you. You are usually ver accurate/precise with your models. :ecstatic:
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Re: A Chair for Escher

Postby Dave R » Wed Jun 28, 2023 3:58 pm

ntxdave wrote:Dave, that is not like you. You are usually ver accurate/precise with your models. :ecstatic:


What? This one is very precisely modeled as intended. I believe M. C. Escher would approve even if it makes Rich's eyes hurt. :D
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Re: A Chair for Escher

Postby ntxdave » Wed Jun 28, 2023 4:20 pm

Maybe I am having eyesight problems. Look at the front right leg and the top right rail. Am I see things in fron of them that should be behind them?

Oh well, I have an appointment with my cataract surgeon in August for my annual checkup. Maybe she can resolve the issue. DUH!
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Re: A Chair for Escher

Postby Box » Wed Jun 28, 2023 4:23 pm

Oh dear, I really hope you are making a joke I'm missing.
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Re: A Chair for Escher

Postby Dave R » Wed Jun 28, 2023 4:26 pm

ntxdave wrote:Oh well, I have an appointment with my cataract surgeon in August for my annual checkup. Maybe she can resolve the issue. DUH!


I hope so. You might want to have a look at the work of M. C. Escher. For example this:

Screenshot - 6_28_2023 , 10_24_43 AM.png
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Etaoin Shrdlu


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Re: A Chair for Escher

Postby ntxdave » Wed Jun 28, 2023 5:02 pm

OK guys, here is what I see!

SketchUcation Chair Model.jpg


Maybe I have gone whacko!
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Re: A Chair for Escher

Postby Box » Wed Jun 28, 2023 5:06 pm

OMG Seriously, have you never heard of Escher!
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Re: A Chair for Escher

Postby Dave R » Wed Jun 28, 2023 5:15 pm

ntxdave wrote:OK guys, here is what I see!


I worked really hard to make that. Well, not really hard. It isn't hard to do at all but it is intentional.
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Re: A Chair for Escher

Postby ntxdave » Wed Jun 28, 2023 5:25 pm

Box wrote:OMG Seriously, have you never heard of Escher!


Dave R wrote:I worked really hard to make that. Well, not really hard. It isn't hard to do at all but it is intentional.


Sorry guys. No I have never heard of Escher. I was trying to be honest. If I need to apologize, then that is what I am doing. :oops:
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Re: A Chair for Escher

Postby Box » Wed Jun 28, 2023 5:33 pm

No need to apologise, just google search escher and look.
I can't imagine working in any sort of imaged based industry and not be aware of M.C.Escher.
Do the search and click the images button, then do the reading.
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Re: A Chair for Escher

Postby ntxdave » Wed Jun 28, 2023 5:43 pm

I looked at some of the stuff on the website but did not read at the bottom.

Got started in all of this stuff by drawing 3D car wash equipment and layouts. I am pretty naive to some of the stuff you guys share.
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Re: A Chair for Escher

Postby Box » Wed Jun 28, 2023 5:58 pm

Scroll back up to the image Dave posted, look at the waterfall and how it drops into a 'canal' now follow the canal to see where the water goes.
Now model that path.
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Re: A Chair for Escher

Postby ntxdave » Wed Jun 28, 2023 6:41 pm

Box wrote:Scroll back up to the image Dave posted, look at the waterfall and how it drops into a 'canal' now follow the canal to see where the water goes.
Now model that path.

OK I get it now......... :thumb:
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Re: A Chair for Escher

Postby pcmoor » Thu Jun 29, 2023 3:00 am

Dave R wrote:
ntxdave wrote:Dave, that is not like you. You are usually ver accurate/precise with your models. :ecstatic:


What? This one is very precisely modeled as intended. I believe M. C. Escher would approve even if it makes Rich's eyes hurt. :D


mine too! so want the correction
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Re: A Chair for Escher

Postby L i am » Thu Jun 29, 2023 11:17 am

Really nice work Dave. As far as Escher I dont know, he had his ups AND downs though ;)
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Re: A Chair for Escher

Postby psylo » Fri Jun 30, 2023 8:52 am

Hi! Nice work!
Can we see an orbiting animation of the model starting from the right viewpoint? It might help some to understand the trick! ;)
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Re: A Chair for Escher

Postby Dave R » Fri Jun 30, 2023 12:57 pm

It's modeled in the same way it would need to be made in reality. Here's something to show that. Click on the image if the GIF doesn't run.

MCE.gif


I wonder how you might achieve this. I found a quick and easy way. I've been thinking about possible ways to apply the method in a more practical sense.
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Re: A Chair for Escher

Postby psylo » Fri Jun 30, 2023 1:57 pm

Thanks !
It's great to see the method you used. I was actually thinking of a different approach, more along the lines of a perspective trick like this (not mine, found on giphy):

I think it might be challenging to achieve accurate shadows though...
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Re: A Chair for Escher

Postby Dave R » Fri Jun 30, 2023 2:24 pm

Accurate shadows would be a challenge but probably easier in mine since the straight parts aren't curved.
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Re: A Chair for Escher

Postby davidheim1 » Sat Jul 01, 2023 8:01 pm

SHalf the woodworkers I know probably don't see anything wrong with your design.
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Re: A Chair for Escher

Postby pcmoor » Sun Jul 02, 2023 12:44 am

It was okay until I sat on it! the joints were quite good, but not for 80kg
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