POV-Ray : Newsgroups : povray.binaries.images : George Stephenson's Rocket Server Time: 16 Jun 2019 07:10:13 GMT
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From: Cousin Ricky
Subject: Re: George Stephenson's Rocket
Date: 2 May 2019 21:43:30
Message: <5ccb6482$1@news.povray.org>
On 2019-05-02 6:18 AM (-4), Ton wrote:
 > Thomas de Groot wrote:
>> What a beauty! I never realised somehow that the boiler was oval-shaped.
>> I assumed it was circular like the more recent steam locs.
> 
> Bedankt for the compliment.
> Is it oval? It's supposed to be a circle, a round circle.

Do the camera right & up vectors match the image aspect ratio (16:9)? 
If I force-view the image at the camera default ratio, which is 4:3, the 
boiler cross section looks circular.

If your camera block lacks these two vectors, you can fix the distortion 
by adding
   right 16/9 * x
to your camera block.


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From: Ton
Subject: Re: George Stephenson's Rocket
Date: 2 May 2019 22:50:01
Message: <web.5ccb73386bc50fb542d8ebd00@news.povray.org>
Cousin Ricky <ric### [at] yahoocom> wrote:
> On 2019-05-02 6:18 AM (-4), Ton wrote:
>  > Thomas de Groot wrote:
> >> What a beauty! I never realised somehow that the boiler was oval-shaped.
> >> I assumed it was circular like the more recent steam locs.
> >
> > Bedankt for the compliment.
> > Is it oval? It's supposed to be a circle, a round circle.
>
> Do the camera right & up vectors match the image aspect ratio (16:9)?
> If I force-view the image at the camera default ratio, which is 4:3, the
> boiler cross section looks circular.
>
> If your camera block lacks these two vectors, you can fix the distortion
> by adding
>    right 16/9 * x
> to your camera block.

This is highly embarrassing. Povray 3.8 sets the aspect ratio depending on the
image format. So I didn't set the right vector in the camera.
The #version in my pov-file was set to 3.7 however, and then the aspect ratio is
1.33.
There are some hawk-eyed people out there. Thanks everybody.

BTW as excuse for myself: As long as there are no circles in your object, you
hardly notice! Poor excuse, I know, but better than nothing.

Cheers
Ton.


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From: Thomas de Groot
Subject: Re: George Stephenson's Rocket
Date: 3 May 2019 06:46:46
Message: <5ccbe3d6$1@news.povray.org>
On 3-5-2019 0:46, Ton wrote:
> Cousin Ricky <ric### [at] yahoocom> wrote:
>> On 2019-05-02 6:18 AM (-4), Ton wrote:
>>   > Thomas de Groot wrote:
>>>> What a beauty! I never realised somehow that the boiler was oval-shaped.
>>>> I assumed it was circular like the more recent steam locs.
>>>
>>> Bedankt for the compliment.
>>> Is it oval? It's supposed to be a circle, a round circle.
>>
>> Do the camera right & up vectors match the image aspect ratio (16:9)?
>> If I force-view the image at the camera default ratio, which is 4:3, the
>> boiler cross section looks circular.
>>
>> If your camera block lacks these two vectors, you can fix the distortion
>> by adding
>>     right 16/9 * x
>> to your camera block.
> 
> This is highly embarrassing. Povray 3.8 sets the aspect ratio depending on the
> image format. So I didn't set the right vector in the camera.
> The #version in my pov-file was set to 3.7 however, and then the aspect ratio is
> 1.33.
> There are some hawk-eyed people out there. Thanks everybody.
> 
> BTW as excuse for myself: As long as there are no circles in your object, you
> hardly notice! Poor excuse, I know, but better than nothing.
> 
> Cheers
> Ton.
> 

You can leave all problems behind forever by using:

right x*image_width/image_height

in your camera block. That way your aspect ratio is always correct.

-- 
Thomas


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From: Ton
Subject: Re: George Stephenson's Rocket
Date: 8 May 2019 09:25:01
Message: <web.5cd29ffb6bc50fb5b7f0d98c0@news.povray.org>
I've continued with the Rocket, and managed some perfect round wheels!
Now onto the cylinders and pistons.

Cheers
Ton.


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From: Gregor Szaktilla
Subject: Re: George Stephenson's Rocket
Date: 8 May 2019 18:43:59
Message: <5cd3236f$1@news.povray.org>
Ton schrieb:
> I've continued with the Rocket ...
Great work!

I love that kind of modelmaking.

Gregor


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From: Ton
Subject: Re: George Stephenson's Rocket
Date: 8 May 2019 21:40:00
Message: <web.5cd34c446bc50fb5b7f0d98c0@news.povray.org>
Gregor Szaktilla <spa### [at] ktillade> wrote:
> Ton schrieb:
> > I've continued with the Rocket ...
> Great work!
>
> I love that kind of modelmaking.
>
> Gregor

Me too, it's fun.
Danke Gregor.


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From: Thomas de Groot
Subject: Re: George Stephenson's Rocket
Date: 9 May 2019 06:39:02
Message: <5cd3cb06$1@news.povray.org>
On 8-5-2019 11:23, Ton wrote:
> I've continued with the Rocket, and managed some perfect round wheels!
> Now onto the cylinders and pistons.
> 
> Cheers
> Ton.
> 

Is it just me? I believe that these early innovations (including also 
the Eifel Tower) have much more artistic/aesthetic appeal than, lets 
say... a Saturn 5 rocket! I know that modern design can be aesthetically 
attractive too once in a while, but it has not that same "glow" as those 
19th century products.

-- 
Thomas


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From: Ton
Subject: Re: George Stephenson's Rocket
Date: 9 May 2019 09:25:01
Message: <web.5cd3f1196bc50fb5b7f0d98c0@news.povray.org>
> Is it just me? I believe that these early innovations (including also
> the Eifel Tower) have much more artistic/aesthetic appeal than, lets
> say... a Saturn 5 rocket! I know that modern design can be aesthetically
> attractive too once in a while, but it has not that same "glow" as those
> 19th century products.
>
> --
> Thomas

I don't think it's just you. Compare Amsterdam Centraal Station with for
instance Eindhoven, or other modern railway stations.
A very fine example of Victorian design is this sewage pumping station in
England:
http://www.annandave.org/Abby%20Mills.htm

Its main purpose is (was) pumping London sewage into the Thames. It looks like a
castle, and inside.....

Cheers
Ton.


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From: Thomas de Groot
Subject: Re: George Stephenson's Rocket
Date: 10 May 2019 06:33:51
Message: <5cd51b4f$1@news.povray.org>
On 9-5-2019 11:21, Ton wrote:
>> Is it just me? I believe that these early innovations (including also
>> the Eifel Tower) have much more artistic/aesthetic appeal than, lets
>> say... a Saturn 5 rocket! I know that modern design can be aesthetically
>> attractive too once in a while, but it has not that same "glow" as those
>> 19th century products.
>>
>> --
>> Thomas
> 
> I don't think it's just you. Compare Amsterdam Centraal Station with for
> instance Eindhoven, or other modern railway stations.
> A very fine example of Victorian design is this sewage pumping station in
> England:
> http://www.annandave.org/Abby%20Mills.htm
> 
> Its main purpose is (was) pumping London sewage into the Thames. It looks like a
> castle, and inside.....
> 

I fully agree. So many examples could be mentioned, e.g.: The railway 
station of Haarlem (the first in NL if I remember correctly), the 
ancient Halles of Paris (replaced by that monstrous Centre Pompidou)...

-- 
Thomas


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From: Ton
Subject: Re: George Stephenson's Rocket
Date: 15 May 2019 09:55:02
Message: <web.5cdbe1306bc50fb5939601860@news.povray.org>
>
> I fully agree. So many examples could be mentioned, e.g.: The railway
> station of Haarlem (the first in NL if I remember correctly), the
> ancient Halles of Paris (replaced by that monstrous Centre Pompidou)...
>
> --
> Thomas

Haha, were you around in Haarlem in 1839, that you remember that station?

Here is an update on my Rocket-model. The only thing left are the pistons and
connecting rods, and then some pipes left, and then I can have a look at the
tender.

Cheers
Ton.


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