[3dem] Surface projection maps.

[Dimitry Tegunov]

Hi Everyone,

while the tools already suggested provide a great solution for regular
geometric bodies, distortion-free surface unwrapping can be more
challenging for irregular shapes. Membranorama
<https://github.com/dtegunov/membranorama> offers a range of tools to help
with that, projects the density information (or its integral along the
surface normals) in 2D or 3D, and lets you pick and visualize objects
adjacent to the surface.

Cheers,
Dimitry

On Wed, Feb 13, 2019 at 12:05 PM Steinar Halldorsson <
steinar.halldorsson at crick.ac.uk> wrote:

> Hi all
>
> Thanks for all the suggestions! Looks like the problem has been solved a
> few times.
>
> Cheers,
> Steinar
> ------------------------------
> *From:* Daniel Castano Diez <daniel.castano at unibas.ch>
> *Sent:* 12 February 2019 18:46
> *To:* Steinar Halldorsson
> *Cc:* 3dem at ncmir.ucsd.edu
> *Subject:* Re: [3dem] Surface projection maps.
>
> Hi Steinar,
>
> For small volumes you can use the Dynamo command "dcoordinates", I wrote a
> small walkthrough for this:
>
>
> https://wiki.dynamo.biozentrum.unibas.ch/w/index.php/Example_of_use_of_dcoordinates
> <https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwiki.dynamo.biozentrum.unibas.ch%2Fw%2Findex.php%2FExample_of_use_of_dcoordinates&data=02%7C01%7C%7Cf2ffca3c206f435b20df08d6911a7764%7C4eed7807ebad415aa7a99170947f4eae%7C0%7C0%7C636855940202674714&sdata=eCesWdEa%2F9opCvv%2FZZz6u9iLDuFrn87Ns0X%2BmuYCs7o%3D&reserved=0>
>
> Hope it helps,
> Daniel
>
> On 12 Feb 2019, at 17:41, Steinar Halldorsson <
> steinar.halldorsson at crick.ac.uk> wrote:
>
> Hi all
>
> I would like to do something which I'm hoping that someone else has done
> before, or at least something similar and might have a solution to share.
>
> I have some raw tomograms of spherical-ish viral particles and I would
> like to create a flattened (projected) 2D image of the surface of a single
> virion. I'm thinking that it would be sort of like making a world map using
> the Mercator projection, i.e. projecting a sphere onto a cylinder and
> "rolling out" the cylinder. Ideally there would be a way to average several
> pixels in each direction to enhance the contrast in the tomogram.
>
> Has anyone seen something like this done in a publication or has even done
> something like this themselves?
>
>
> Best wishes,
> Steinar
>
>
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