POV-Ray : Newsgroups : povray.binaries.images : Vapour trails Server Time
6 Nov 2024 00:28:08 EST (-0500)
  Vapour trails (Message 1 to 4 of 4)  
From: scott
Subject: Vapour trails
Date: 22 Apr 2005 05:54:46
Message: <4268c9e6@news.povray.org>
See off-topic.


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From: Rune
Subject: Re: Vapour trails
Date: 22 Apr 2005 06:10:48
Message: <4268cda8$1@news.povray.org>
scott wrote:
> See off-topic.

The white trail is almost right above the head of the observer, making its 
appearance almost vertical in the image, meaning that it would look straight 
no matter how much curved it was (well almost).

Putting the curved white line on the other side of the straight red one (or 
maybe just at the same location) would make for a better comparison - though 
the result might very well be that it still looks straight.

Rune
-- 
3D images and anims, include files, tutorials and more:
rune|vision:  http://runevision.com
POV-Ray Ring: http://webring.povray.co.uk


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From: scott
Subject: Re: Vapour trails
Date: 22 Apr 2005 06:31:25
Message: <4268d27d@news.povray.org>
Rune wrote:
> scott wrote:
>> See off-topic.
>
> The white trail is almost right above the head of the observer,
> making its appearance almost vertical in the image, meaning that it
> would look straight no matter how much curved it was (well almost).
>
> Putting the curved white line on the other side of the straight red
> one (or maybe just at the same location) would make for a better
> comparison - though the result might very well be that it still looks
> straight.
>
> Rune


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From: Phil Cook
Subject: Re: Vapour trails
Date: 22 Apr 2005 10:04:37
Message: <opspmz13r2c3xi7v@news.povray.org>
And lo on Fri, 22 Apr 2005 11:32:47 +0100, scott <sco### [at] spamcom> did  
spake, saying:

fun mod of my own using distinct spheres, each sphere is the same height  
 from the surface with the yellow spheres arc length being the same  
distance as the straight line between the red spheres. Just to show the  
obvious differences in distance vs time for straight vs curved paths.

EarthRadius=6378.1; //km
FlightHeight=16; //km
PersonHeight=(1.8/1000);//km

-- 
Phil Cook

--
All thoughts and comments are my own unless otherwise stated and I am  
happy to be proven wrong.


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Attachments:
Download 'vapor trail flat.png' (14 KB) Download 'vapor trail curve.png' (14 KB) Download 'vapor trail curve overhead.png' (15 KB)

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vapor trail flat.png

Preview of image 'vapor trail curve.png'
vapor trail curve.png

Preview of image 'vapor trail curve overhead.png'
vapor trail curve overhead.png


 

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