POV-Ray : Newsgroups : povray.binaries.images : <no subject> Server Time
29 Mar 2024 03:32:14 EDT (-0400)
  <no subject> (Message 1 to 10 of 14)  
Goto Latest 10 Messages Next 4 Messages >>>
From: Bald Eagle
Subject: <no subject>
Date: 20 Oct 2017 21:55:01
Message: <web.59eaa80bc23a6d95cafe28e0@news.povray.org>
Mostly because they didn't have a picture to go with the Wikipedia article...

https://en.wikipedia.org/wiki/Curve_of_constant_width


So here it is folks, the eighth-order polynomial defined by:

(x^2+y^2)^4 - 45(x^2+y^2)^3 - 41283(x^2+y^2)^2 + 7950960(x^2+y^2) +
16(x^2-3y^2)^3 + 48(x^2+y^2)(x^2-3y^2)^2 + (x^2-3y^2)x[16(x^2+y^2)^2 -
5544(x^2+y^2)+266382] - 720^3


[also see https://arxiv.org/pdf/1504.06733.pdf pg. 21]


Post a reply to this message


Attachments:
Download 'polynomial1.png' (316 KB)

Preview of image 'polynomial1.png'
polynomial1.png


 

From: Alain
Subject: Re: <no subject>
Date: 21 Oct 2017 12:08:42
Message: <59eb710a$1@news.povray.org>

> Mostly because they didn't have a picture to go with the Wikipedia article...
> 
> https://en.wikipedia.org/wiki/Curve_of_constant_width
> 
> 
> So here it is folks, the eighth-order polynomial defined by:
> 
> (x^2+y^2)^4 - 45(x^2+y^2)^3 - 41283(x^2+y^2)^2 + 7950960(x^2+y^2) +
> 16(x^2-3y^2)^3 + 48(x^2+y^2)(x^2-3y^2)^2 + (x^2-3y^2)x[16(x^2+y^2)^2 -
> 5544(x^2+y^2)+266382] - 720^3
> 
> 
> [also see https://arxiv.org/pdf/1504.06733.pdf pg. 21]
> 

And you did not already added it to the wiki page ?


Post a reply to this message

From: Bald Eagle
Subject: Re: <no subject>
Date: 23 Oct 2017 13:15:03
Message: <web.59ee227e6f92e856c437ac910@news.povray.org>
Alain <kua### [at] videotronca> wrote:

> > Mostly because they didn't have a picture to go with the Wikipedia article...

> And you did not already added it to the wiki page ?

Nope:

1.  I didn't have a wikipedia account
[I do now]
2.  When I tried to edit the article, some automated filter claimed the edit
didn't add anything important - or something similar.

I'll give it a another go when I have some more free time and I better
understand how to edit a wiki page.


Post a reply to this message

From: Kenneth
Subject: Re: <no subject>
Date: 24 Oct 2017 20:05:00
Message: <web.59efd49d6f92e85689df8d30@news.povray.org>
"Bald Eagle" <cre### [at] netscapenet> wrote:

>
> I'll give it a another go when I have some more free time and I better
> understand how to edit a wiki page.

Good! Then you can teach me how to do it ;-)


Post a reply to this message

From: Ive
Subject: Re: <no subject>
Date: 25 Oct 2017 04:29:54
Message: <59f04b82$1@news.povray.org>
Am 10/21/2017 um 3:51 schrieb Bald Eagle:
> Mostly because they didn't have a picture to go with the Wikipedia article...
> 
> https://en.wikipedia.org/wiki/Curve_of_constant_width
> 
> 
> So here it is folks, the eighth-order polynomial defined by:
> 
> (x^2+y^2)^4 - 45(x^2+y^2)^3 - 41283(x^2+y^2)^2 + 7950960(x^2+y^2) +
> 16(x^2-3y^2)^3 + 48(x^2+y^2)(x^2-3y^2)^2 + (x^2-3y^2)x[16(x^2+y^2)^2 -
> 5544(x^2+y^2)+266382] - 720^3
> 
> 
> [also see https://arxiv.org/pdf/1504.06733.pdf pg. 21]
> 

Please do not use this 3d-look text (that even throws shadows) with this 
image. Besides that it IMHO does not look good it is more importantly 
very hard to read.
And personally - e.g. on a wiki-page - I hate text information where 
copy and paste doesn't work ;)

-Ive


Post a reply to this message

From: Stephen
Subject: Re: <no subject>
Date: 25 Oct 2017 05:29:27
Message: <59f05977$1@news.povray.org>
On 25/10/2017 09:29, Ive wrote:
> Am 10/21/2017 um 3:51 schrieb Bald Eagle:
>> Mostly because they didn't have a picture to go with the Wikipedia 
>> article...
>>
>> https://en.wikipedia.org/wiki/Curve_of_constant_width
>>
>>
>> So here it is folks, the eighth-order polynomial defined by:
>>
>> (x^2+y^2)^4 - 45(x^2+y^2)^3 - 41283(x^2+y^2)^2 + 7950960(x^2+y^2) +
>> 16(x^2-3y^2)^3 + 48(x^2+y^2)(x^2-3y^2)^2 + (x^2-3y^2)x[16(x^2+y^2)^2 -
>> 5544(x^2+y^2)+266382] - 720^3
>>
>>
>> [also see https://arxiv.org/pdf/1504.06733.pdf pg. 21]
>>
> 
> Please do not use this 3d-look text (that even throws shadows) with this 
> image. Besides that it IMHO does not look good it is more importantly 
> very hard to read.

Oh! I liked it.

> And personally - e.g. on a wiki-page - I hate text information where 
> copy and paste doesn't work ;)
> 

In that case you might like capture2text. It is a utility that takes a 
screenshot of part of your screen then OCR's it and puts the text in the 
clipboard. I've been using it for a couple of years.
Although it doesn't work too well with Bald Eagle's 3D text.
It can also use Google Translate.

http://capture2text.sourceforge.net/

-- 

Regards
     Stephen


Post a reply to this message

From: Thomas de Groot
Subject: Re: <no subject>
Date: 25 Oct 2017 07:06:52
Message: <59f0704c$1@news.povray.org>
On 25-10-2017 11:29, Stephen wrote:
> On 25/10/2017 09:29, Ive wrote:
>> Am 10/21/2017 um 3:51 schrieb Bald Eagle:
>>> Mostly because they didn't have a picture to go with the Wikipedia 
>>> article...
>>>
>>> https://en.wikipedia.org/wiki/Curve_of_constant_width
>>>
>>>
>>> So here it is folks, the eighth-order polynomial defined by:
>>>
>>> (x^2+y^2)^4 - 45(x^2+y^2)^3 - 41283(x^2+y^2)^2 + 7950960(x^2+y^2) +
>>> 16(x^2-3y^2)^3 + 48(x^2+y^2)(x^2-3y^2)^2 + (x^2-3y^2)x[16(x^2+y^2)^2 -
>>> 5544(x^2+y^2)+266382] - 720^3
>>>
>>>
>>> [also see https://arxiv.org/pdf/1504.06733.pdf pg. 21]
>>>
>>
>> Please do not use this 3d-look text (that even throws shadows) with 
>> this image. Besides that it IMHO does not look good it is more 
>> importantly very hard to read.
> 
> Oh! I liked it.

Me too, but I must agree with Ive here. I would also add (sorry for 
this) that the object texture is misleading: it looks like a 3D surface, 
curved towards the viewer, while it is flat in reality. It took me a 
while before I understood what I was looking at.

-- 
Thomas


Post a reply to this message

From: Bald Eagle
Subject: Re: <no subject>
Date: 25 Oct 2017 12:40:00
Message: <web.59f0bd956f92e856c437ac910@news.povray.org>
Ive <ive### [at] lilysoftorg> wrote:

> Please do not use this 3d-look text (that even throws shadows) with this
> image. Besides that it IMHO does not look good it is more importantly
> very hard to read.

I usually use pretty flat, functional text, and I did think about the look and
readability.  I didn't think it looked TOO bad, but perhaps for a wikipedia
page, it out to be a little less artistic.

> And personally - e.g. on a wiki-page - I hate text information where
> copy and paste doesn't work ;)

Perhaps I can add the text info as plain text or formatted text or MathJax, but
I wanted to have the info in the graphic too - for inseparability purposes.
Along those lines, I wouldn't mind embedding the full POV-Ray scene used to
generate the graphic in the metadata header section of the file - I just have to
puzzle out _exactly_ how.

Thanks for the constructive feedback!

> -Ive


Post a reply to this message

From: Bald Eagle
Subject: Re: <no subject>
Date: 25 Oct 2017 12:45:01
Message: <web.59f0be8e6f92e856c437ac910@news.povray.org>
Thomas de Groot <tho### [at] degrootorg> wrote:

> Me too, but I must agree with Ive here. I would also add (sorry for
> this) that the object texture is misleading: it looks like a 3D surface,
> curved towards the viewer, while it is flat in reality. It took me a
> while before I understood what I was looking at.
>
> --
> Thomas

It's not really textured - I have it lit with 4 lights - white, magenta, yellow,
and blue.

It IS 3D - just not concave or convex, since the z components are all zero, and
that winds up giving a polynomial object that is infinitely scaled in the
z-direction.  So I intersected it with a thin box.

But I take your meaning.
This leads into a topic about the Documentation that I will post in a fresh
thread.

No need for apologies:  it's constructive, and honest feedback about how the
render comes out.


Post a reply to this message

From: Bald Eagle
Subject: Re: <no subject>
Date: 26 Oct 2017 06:45:01
Message: <web.59f1bc036f92e8565cafe28e0@news.povray.org>
Simpler version


Post a reply to this message


Attachments:
Download 'polynomial1.png' (224 KB)

Preview of image 'polynomial1.png'
polynomial1.png


 

Goto Latest 10 Messages Next 4 Messages >>>

Copyright 2003-2023 Persistence of Vision Raytracer Pty. Ltd.