POV-Ray : Newsgroups : povray.advanced-users : Facebook 3D posts : Re: Facebook 3D posts Server Time
7 Jun 2023 21:36:56 EDT (-0400)
  Re: Facebook 3D posts  
From: Mike Horvath
Date: 27 Jun 2021 13:53:34
Message: <60d8bb1e$1@news.povray.org>
On 6/27/2021 8:19 AM, Bald Eagle wrote:
> There are plenty of examples of people creating POV-Ray renderings based on real
> things - things they often only have photographs of.
> But then I was thinking that there are probably actual POV-Ray renderings, but
> somehow the source to generate those renderings have been lost due to the code
> never being posted, a HDD crash, or just getting - lost.  People might want to
> recreate a scene, and having some basic information about the size and placement
> of the objects in the scene would greatly speed up the writing of a new scene
> file.
> I know that I have done some work to recreate some of the documentation images
> for things like isosurfaces, and didn't have the code for those images.   I had
> to make educated guesses.  I "knew" the probably size of the object, or at least
> its relative scale, and then I just needed to place the camera and light source
> in the right place to get the image to look the same.   But determining where
> the camera and light source are seems to me to be something that could be
> calculated using "photogrammetric image cues" and well-established equations.
> Let's take a photograph of a room.  It likely has tables and chairs and windows,
> and these all have right angles and typical sizes.  It seems to me that there
> might be a way to use photogrammetry to compute the 3D points of the corners and
> rapidly generate a basic set of vectors for the proper sizing and placement of
> everything in a basic rendered version of that same room.
> I know that they have cell phone apps that can generate a floor plan of your
> house just by snapping a few photos of the rooms from different angles.
> Also, the "augmented reality" apps for cell phones.

Can (most likely) already be done using general purpose external tools. 
At what stage is povray useful/necessary?


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