POV-Ray : Newsgroups : povray.binaries.images : Scary coronavirus WIP Server Time: 28 May 2020 22:46:24 GMT
  Scary coronavirus WIP (Message 1 to 6 of 6)  
From: Cousin Ricky
Subject: Scary coronavirus WIP
Date: 8 Apr 2020 02:06:05
Message: <5e8d318d@news.povray.org>
I think a Gorgon-like quality befits a depiction of the SARS-CoV-2 
agent.  I'm still working on collision avoidance between the 3 types of 
stud proteins, preferably faster than O(n²).


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Preview of image 'show_scov-wip1.jpg'
show_scov-wip1.jpg


 

From: jr
Subject: Re: Scary coronavirus WIP
Date: 8 Apr 2020 08:55:01
Message: <web.5e8d90898e415fef827e2b3e0@news.povray.org>
hi,

Cousin Ricky <ric### [at] yahoocom> wrote:
> I think a Gorgon-like quality befits a depiction of the SARS-CoV-2
> agent.

:-)  agree.  v nice.


regards, jr.


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From: Norbert Kern
Subject: Re: Scary coronavirus WIP
Date: 8 Apr 2020 13:30:00
Message: <web.5e8dd1318e415fefab765f000@news.povray.org>
Cousin Ricky <ric### [at] yahoocom> wrote:
> I think a Gorgon-like quality befits a depiction of the SARS-CoV-2
> agent.  I'm still working on collision avoidance between the 3 types of
> stud proteins, preferably faster than O(n²).


really nice model - did you use a pdb file or other coordinates to build the
monster?

by the way - perhaps you want to use a more dramatic or glamorous lighting and a
material to depicture the sticky properties of the hull proteins?

happy rendering
Norbert


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From: Cousin Ricky
Subject: Re: Scary coronavirus WIP
Date: 8 Apr 2020 21:52:15
Message: <5e8e478f@news.povray.org>
On 2020-04-08 9:27 AM (-4), Norbert Kern wrote:
> 
> really nice model - did you use a pdb file or other coordinates to build the
> monster?

No, I don't (yet) have the tools for that.  I just estimated dimensions 
from images on the Web:
   https://phil.cdc.gov/Details.aspx?pid=23313
   https://science.sciencemag.org/content/367/6483/1260
 
https://commons.wikimedia.org/wiki/File:6VSB_spike_protein_SARS-CoV-2_monomer_in_homotrimer.png

That last image has some benzene rings hanging out, so I extrapolated 
the size of the spike protein from those, and assumed an membrane 
thickness of 4nm to estimate how much of the spike is buried in the 
envelope.

It would be hard to overlay a face on top of a PDB model anyway.  But 
the receptor-binding domain (the projection that tricks lung cells into 
admitting the virus) turns out to be in a convenient position for a horn 
sticking out of a forehead.

> by the way - perhaps you want to use a more dramatic or glamorous lighting and a
> material to depicture the sticky properties of the hull proteins?

Here ya go!


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Attachments:
Download 'show_scov-wip2.jpg' (114 KB)

Preview of image 'show_scov-wip2.jpg'
show_scov-wip2.jpg


 

From: Cousin Ricky
Subject: Re: Scary coronavirus WIP
Date: 9 Apr 2020 21:35:10
Message: <5e8f950e$1@news.povray.org>
On 2020-04-07 10:06 PM (-4), Cousin Ricky wrote:
>   I'm still working on collision avoidance between the 3 types of 
> stud proteins, preferably faster than O(n²).

Well, so far all my attempts at algorithmic collision avoidance have 
succeeded in 100% collision avoidance, but with a glaring lack of 
uniform interspersion.  Some of my attempts are attached.  The best 
looking virion is the one with no collision avoidance at all!  Looks 
like I will have to go brute force.  (The WIPs posted above use the same 
non-avoidant algorithm as space_scov_proteins0.jpg, but with jittered 
spikes.)


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Attachments:
Download 'space_scov_proteins0.jpg' (38 KB)
Download 'space_scov_proteins2.jpg' (38 KB)
Download 'space_scov_proteins5.jpg' (39 KB)

Preview of image 'space_scov_proteins0.jpg'
space_scov_proteins0.jpg

Preview of image 'space_scov_proteins2.jpg'
space_scov_proteins2.jpg

Preview of image 'space_scov_proteins5.jpg'
space_scov_proteins5.jpg


 

From: Bald Eagle
Subject: Re: Scary coronavirus WIP
Date: 9 Apr 2020 22:05:01
Message: <web.5e8f9ba28e415feffb0b41570@news.povray.org>
What if you use one of POV-Ray's pigment patterns to map the sphere's surface,
and then use eval_pigment to place the features?

Something like bozo, crackle solid, or agate might give you a decent
distribution if you just scan the sphere surface with a grid.


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