POV-Ray : Newsgroups : povray.binaries.images : Georgia still on my mind! Server Time: 27 Sep 2020 20:39:07 GMT
  Georgia still on my mind! (Message 1 to 2 of 2)  
From: Jörg "Yadgar" Bleimann
Subject: Georgia still on my mind!
Date: 14 Aug 2020 02:01:50
Message: <5f35f08e$1@news.povray.org>
Hi(gh)!

Having fixed my technical problems (almost), I continue with producing 
vistas of Georgia... the first image shows the view across Mtkvari river 
(where the capital Tbilisi would be built in a later version and in 
collaboration with Giorgi Partskhaladze) from a hill southwest of Tbilisi.

The second image is a view from the eastern edge of the tile westward, 
at a camera height of 20,000 metres above sea level. There obviously 
still are some artifacts (black areas), I'm not sure whether they might 
be just shadows...

And yet another issue: while generating the mesh2 with taking the 
Earth's flattening already into account when calculating the vertices 
did (strangely!) result in empty scenes, I rather simply compressed the 
whole union of Earth sphere, ocean sphere and mesh2 by the flattening 
factor along the y axis - which geometrically is not correct! And of 
course, as the trace vector for the camera placement is tested against 
the undistorted mesh2, camera locations in the rendered scene are also 
not really precise... perhaps I still better go with a non-flattened Earth!

See you in Khyberspace!

Yadgar


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Attachments:
Download '2020-08-14 tbilisi area, take 6 - view across mtkvari river.jpg' (29 KB)
Download '2020-08-14 tbilisi area, take 7 - view westward across entire n41e044 tile.jpg' (59 KB)

Preview of image '2020-08-14 tbilisi area, take 6 - view across mtkvari river.jpg'
2020-08-14 tbilisi area, take 6 - view across mtkvari river.jpg

Preview of image '2020-08-14 tbilisi area, take 7 - view westward across entire n41e044 tile.jpg'
2020-08-14 tbilisi area, take 7 - view westward across entire n41e044 tile.jpg


 

From: Alain Martel
Subject: Re: Georgia still on my mind!
Date: 14 Aug 2020 15:47:46
Message: <5f36b222$1@news.povray.org>
Le 2020-08-13 à 22:02, Jörg "Yadgar" Bleimann a écrit :
>. perhaps I still better go with a non-flattened Earth!
> 
> See you in Khyberspace!
> 
> Yadgar


Given that Earth's oblateness is only about 0.3%, that would be very 
acceptable, not to mention much simpler to implement.


Alain


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