A long day's work. Pure SDL job so far. Still a looooooooooooong way to 
go though.

Comments so far, anyone?

(Anyone can guess the engine type already? Um, well, not bloody likely I 
bet..)

Next thing on the agenda: Get the square-ish firebox fused with the 
round boiler... I wonder how I ever gonna make /that/...

Post a reply to this message

Attachments:
Download 'steam.png' (229 KB)

Preview of image 'steam.png'

clipka <ano### [at] anonymousorg> wrote:
> Next thing on the agenda: Get the square-ish firebox fused with the
> round boiler... I wonder how I ever gonna make /that/...

You have cone sections for the round boiler? Maybe tangence.inc will work. I
don't know.

Pure POV you say? Isosurfaces work; you can blob mathematical shapes together.

You could always cheat and use Blender's meta shapes. They fuse quickly and
you'll still be using free tools ;)

Sam

Post a reply to this message

"clipka" <ano### [at] anonymousorg> schreef in bericht 
news:4a8ca077@news.povray.org...
>A long day's work. Pure SDL job so far. Still a looooooooooooong way to
> go though.
>
> Comments so far, anyone?
>
> (Anyone can guess the engine type already? Um, well, not bloody likely I
> bet..)

Aaah.... memories.... Those were the days! The noise, the smells... and the 
soot on your face if you stayed too long at the open window :-) In my youth 
I often travelled by train between Amsterdam and Paris. Electrical traction 
till Brussels, then steam till Paris. That was the most interesting part of 
course for a young kid :-)

Thomas

Post a reply to this message

Samuel Benge schrieb:
> You have cone sections for the round boiler? Maybe tangence.inc will work. I
> don't know.

Sounds like something worth having a look at. Never heard of it before 
though - any idea where to find it? (Google's not my friend on this one.)


> Pure POV you say? Isosurfaces work; you can blob mathematical shapes together.

That would require me having a clear idea about the mathematical shape 
for both the boiler and firebox in the first place :P

But it may indeed be the way to go.


> You could always cheat and use Blender's meta shapes. They fuse quickly and
> you'll still be using free tools ;)

If it was about using free tools, I'd go for Wings 3D. Blender? No, 
thanks :P

Post a reply to this message

clipka schrieb:
>> You have cone sections for the round boiler? Maybe tangence.inc will 
>> work. I don't know.
> 
> Sounds like something worth having a look at. Never heard of it before 
> though - any idea where to find it? (Google's not my friend on this one.)

Ah well, Google is. Found it after all.

Doesn't appear to do my firebox thing though.

Post a reply to this message

Thomas de Groot wrote:
> "clipka" <ano### [at] anonymousorg> schreef in bericht 
> news:4a8ca077@news.povray.org...
> 
>>A long day's work. Pure SDL job so far. Still a looooooooooooong way to
>>go though.
>>
>>Comments so far, anyone?
>>
>>(Anyone can guess the engine type already? Um, well, not bloody likely I
>>bet..)
> 
> 
> Aaah.... memories.... Those were the days! The noise, the smells... and the 
> soot on your face if you stayed too long at the open window :-) In my youth 
> I often travelled by train between Amsterdam and Paris. Electrical traction 
> till Brussels, then steam till Paris. That was the most interesting part of 
> course for a young kid :-)
> 
> Thomas
> 
> 
You remember steam locomotives???  I'm gobsmacked!

Post a reply to this message

"Jim Charter" <jrc### [at] msncom> a écrit dans le message de news: 
4a8d41f8$1@news.povray.org...
>>
> You remember steam locomotives???  I'm gobsmacked!

When I was 12y old (in the 70's), I took one of the last french steam trains 
every second weekend to come back home from school and way back (wasn't 
Hogwarts BTW :-( )
The locomotive was a Pacific 231 (French notation) or 4-6-2.
Few years after they were replaced by diesel/electric locomotives.

Marc

Post a reply to this message

On Thu, 20 Aug 2009 08:30:32 -0400, Jim Charter <jrc### [at] msncom> wrote:

>> 
>You remember steam locomotives???  I'm gobsmacked!

He is not the only one :) The smell of them remains with me.

Also carriages without a connecting corridor or toilet. The phrase "Do you need
to go?" was said a lot to children.
-- 

Regards
     Stephen

Post a reply to this message

Only about thirty to thirty five years ago steam locomotives were a common 
sight and regular means of transport in East Germany. I rememember driving 
in them when I was a kid.

Then, here in Germany, there still is at least one railroad with two 
steamers still working - the "Harzquerbahn". 
http://en.wikipedia.org/wiki/Harzquerbahn

There is a webcam that is updated on every train's arrival. Sometimes you 
see the steamer, sometimes its a plain train.

http://www.hsb-wr.de/hsb_barrierefrei/webcams/dah/dah_bhf.htm


"Jim Charter" <jrc### [at] msncom> schrieb im Newsbeitrag 
news:4a8d41f8$1@news.povray.org...
> Thomas de Groot wrote:
>> "clipka" <ano### [at] anonymousorg> schreef in bericht 
>> news:4a8ca077@news.povray.org...
>>
>>>A long day's work. Pure SDL job so far. Still a looooooooooooong way to
>>>go though.
>>>
>>>Comments so far, anyone?
>>>
>>>(Anyone can guess the engine type already? Um, well, not bloody likely I
>>>bet..)
>>
>>
>> Aaah.... memories.... Those were the days! The noise, the smells... and 
>> the soot on your face if you stayed too long at the open window :-) In my 
>> youth I often travelled by train between Amsterdam and Paris. Electrical 
>> traction till Brussels, then steam till Paris. That was the most 
>> interesting part of course for a young kid :-)
>>
>> Thomas
>>
>>
> You remember steam locomotives???  I'm gobsmacked!

Post a reply to this message

TC wrote:
> Only about thirty to thirty five years ago steam locomotives were a common 
> sight and regular means of transport in East Germany. I rememember driving 
> in them when I was a kid.
> 
> Then, here in Germany, there still is at least one railroad with two 
> steamers still working - the "Harzquerbahn". 
> http://en.wikipedia.org/wiki/Harzquerbahn
> 
> There is a webcam that is updated on every train's arrival. Sometimes you 
> see the steamer, sometimes its a plain train.
> 
> http://www.hsb-wr.de/hsb_barrierefrei/webcams/dah/dah_bhf.htm
> 
> 
> "Jim Charter" <jrc### [at] msncom> schrieb im Newsbeitrag 
> news:4a8d41f8$1@news.povray.org...
> 
>>Thomas de Groot wrote:
>>
>>>"clipka" <ano### [at] anonymousorg> schreef in bericht 
>>>news:4a8ca077@news.povray.org...
>>>
>>>
>>>>A long day's work. Pure SDL job so far. Still a looooooooooooong way to
>>>>go though.
>>>>
>>>>Comments so far, anyone?
>>>>
>>>>(Anyone can guess the engine type already? Um, well, not bloody likely I
>>>>bet..)
>>>
>>>
>>>Aaah.... memories.... Those were the days! The noise, the smells... and 
>>>the soot on your face if you stayed too long at the open window :-) In my 
>>>youth I often travelled by train between Amsterdam and Paris. Electrical 
>>>traction till Brussels, then steam till Paris. That was the most 
>>>interesting part of course for a young kid :-)
>>>
>>>Thomas
>>>
>>>
>>
>>You remember steam locomotives???  I'm gobsmacked! 
> 
> 
> 
> 
My earliest memories of such things would date to the late fifties.  I 
never saw anything other than a deisel loc.

Post a reply to this message

> My earliest memories of such things would date to the late fifties.  I 
> never saw anything other than a deisel loc.

Well, travelling with a steamer is an overrated experience - like most 
things we regard as quaint or romantic.

Very nice if you do it from time to time, for pleasure, when you are in for 
a bit of romance. Beatuful to behold, especially on pictures.

But when have you do it often, every week, then the charming experience 
becomes less so. I remember how everbody rushed off to close the carriages 
windows whenever a tunnel was near. If you forgot - or did not know the 
line - let us say it was not very pleasant.

We all are longing for the past, but we tend to remember just the pleasant 
things. Rural life, 40 years past, was it nice? If in winter you had to go 
to an unheated outhouse, at temperatures of -25°C (-13°F)? Worse even than 
doing it in high summer, when the flies were swarming and the odour was 
horrible. No warm water boiler (you heated bath-water once a week on the 
coal stove), no showers, coal ovens as heating in the winter. That was rural 
life in East Germany in the late sixties and early seventies...

Post a reply to this message

> My earliest memories of such things would date to the late fifties.  I
> never saw anything other than a deisel loc.

Well, travelling with a steamer is an overrated experience - like most
things we regard as quaint or romantic.

Very nice if you do it from time to time, for pleasure, when you are in for
a bit of romance. Beatuful to behold, especially on pictures.

But when have you do it often, every week, then the charming experience
becomes less so. I remember how everbody rushed off to close the carriages
windows whenever a tunnel was near. If you forgot - or did not know the
line - let us say it was not very pleasant.

We all are longing for the past, but we tend to remember just the pleasant
things. Rural life, 40 years past, was it nice? If in winter you had to go
to an unheated outhouse, at temperatures of -25°C (-13°F)? Worse even than
doing it in high summer, when the flies were swarming and the odour was
horrible. No warm water boiler (you heated bath-water once a week on the
coal stove), no showers, coal ovens as heating in the winter. That was rural
life in East Germany in the late sixties and early seventies...

Post a reply to this message

"Jim Charter" <jrc### [at] msncom> schreef in bericht 
news:4a8d41f8$1@news.povray.org...
> You remember steam locomotives???  I'm gobsmacked!

1950's in France, until the line I travelled most often on (with my parents) 
was electrified, I think that was end 50's early 60's. I do not really 
remember diesel electrics in between. Before electrification, travelling on 
the line Paris-Amsterdam, the train switched locomotives at Brussels 
(steam -> diesel) and maybe again at Rosendaal (diesel -> electric).

Thomas

Post a reply to this message

"TC" <do-not-reply@i-do get-enough-spam-already-2498.com> schreef in bericht 
news:4a8dfce7$1@news.povray.org...
>
> Well, travelling with a steamer is an overrated experience - like most 
> things we regard as quaint or romantic.
>
> Very nice if you do it from time to time, for pleasure, when you are in 
> for a bit of romance. Beatuful to behold, especially on pictures.
>
> But when have you do it often, every week, then the charming experience 
> becomes less so. I remember how everbody rushed off to close the carriages 
> windows whenever a tunnel was near. If you forgot - or did not know the 
> line - let us say it was not very pleasant.
>
> We all are longing for the past, but we tend to remember just the pleasant 
> things. Rural life, 40 years past, was it nice? If in winter you had to go 
> to an unheated outhouse, at temperatures of -25°C (-13°F)? Worse even than 
> doing it in high summer, when the flies were swarming and the odour was 
> horrible. No warm water boiler (you heated bath-water once a week on the 
> coal stove), no showers, coal ovens as heating in the winter. That was 
> rural life in East Germany in the late sixties and early seventies...

I certainly do agree with you, and in East Germany that experience remained 
longer too. We (oldies) have now forgotten (younger generations never 
experienced it) about how the cities smelled and looked in winter in the 
1950's in most parts of Europe: coal and wood burning in every appartment, 
smelly cars and trucks (much more than nowadays), smog... We complain about 
pollution but forget that already a very long way has been travelled.

Thomas

Post a reply to this message

"m_a_r_c" <jac### [at] wanadoofr> schreef in bericht 
news:4a8d45f1@news.povray.org...
>
> When I was 12y old (in the 70's), I took one of the last french steam 
> trains every second weekend to come back home from school and way back 
> (wasn't Hogwarts BTW :-( )
> The locomotive was a Pacific 231 (French notation) or 4-6-2.
> Few years after they were replaced by diesel/electric locomotives.
>

My school in the Paris banlieue was alongside a railway station of one of 
the local lines. Steam traction was used there I think until about 1963/64. 
Every half hour, class had to be interrupted because of the noise of the 
steam loc starting from the station... and close the windows of course :-) 
I think that most steam engines were Pacifics in those days.

Thomas

Post a reply to this message

"Stephen" <mcavoysAT@aolDOTcom> schreef in bericht 
news:2lhq85pr154amevlvhu24p5c9a93n5h6dk@4ax.com...
>
> Also carriages without a connecting corridor or toilet. The phrase "Do you 
> need
> to go?" was said a lot to children.

I remember those only from the UK....

Thomas

Post a reply to this message

"TC" <do-not-reply@i-do get-enough-spam-already-2498.com> wrote:
> We all are longing for the past, but we tend to remember just the pleasant
> things. Rural life, 40 years past, was it nice? If in winter you had to go
> to an unheated outhouse, at temperatures of -25°C (-13°F)? Worse even than
> doing it in high summer, when the flies were swarming and the odour was
> horrible. No warm water boiler (you heated bath-water once a week on the
> coal stove), no showers, coal ovens as heating in the winter. That was rural
> life in East Germany in the late sixties and early seventies...

And worst of all... no POV-Ray! Arg!

Post a reply to this message

On Fri, 21 Aug 2009 09:37:12 +0200, "Thomas de Groot"
<tDOTdegroot@interDOTnlANOTHERDOTnet> wrote:

>> Also carriages without a connecting corridor or toilet. The phrase "Do you 
>> need
>> to go?" was said a lot to children.
>
>I remember those only from the UK....

We heard rumours that the train carriages on the continent were better. They
even had toilets and you could buy food :). Truthfully I can only vaguely
remember those sort of trains and they weren't long distance ones.
I remember in 1957 been taken from Glasgow to Sky on the train to catch the
steamer to Stornoway. That was a corridor train but the year before going to
Largs on a Sunday School trip, it had unconnected compartments.
-- 

Regards
     Stephen

Post a reply to this message

High!

Jim Charter wrote:

> You remember steam locomotives???  I'm gobsmacked!

Here in (Western) Germany, the last ones were put out of operation in 
1977... so I would not be too young to remember regular steam trains, 
but I hardly can remember any travels by train at all in my childhood 
days, as my parents both had a driving license and for a family of four, 
travelling by car was much cheaper than taking any train back then.

By the way, between 1977 and 1985, steam locomotives were formally 
outlawed in Western Germany!

Nowadays, I'm a die-hard train traveller (no car and no license - it's 
my ecological creed!), but I never had the chance to ride on a "museum 
train"... which would not please me that much, as I'm more into 
hyper-modern high-speed trains (as you see in my current POV-Ray 
project), zooming across France in a TGV or doing Japan by Shinkansen, 
that's me!

See you in Khyberspace!

Yadgar

Now playing: Juan Charrasqueado (Mariachi Nacional)

Post a reply to this message

Thomas de Groot a écrit :
> "TC" <do-not-reply@i-do get-enough-spam-already-2498.com> schreef in bericht 
> news:4a8dfce7$1@news.povray.org...
>> Well, travelling with a steamer is an overrated experience - like most 
>> things we regard as quaint or romantic.
>>
>> Very nice if you do it from time to time, for pleasure, when you are in 
>> for a bit of romance. Beatuful to behold, especially on pictures.
>>
>> But when have you do it often, every week, then the charming experience 
>> becomes less so. I remember how everbody rushed off to close the carriages 
>> windows whenever a tunnel was near. If you forgot - or did not know the 
>> line - let us say it was not very pleasant.
>>
>> We all are longing for the past, but we tend to remember just the pleasant 
>> things. Rural life, 40 years past, was it nice? If in winter you had to go 
>> to an unheated outhouse, at temperatures of -25°C (-13°F)? Worse even than 
>> doing it in high summer, when the flies were swarming and the odour was 
>> horrible. No warm water boiler (you heated bath-water once a week on the 
>> coal stove), no showers, coal ovens as heating in the winter. That was 
>> rural life in East Germany in the late sixties and early seventies...
> 
> I certainly do agree with you, and in East Germany that experience remained 
> longer too. We (oldies) have now forgotten (younger generations never 
> experienced it) about how the cities smelled and looked in winter in the 
> 1950's in most parts of Europe: coal and wood burning in every appartment, 
> smelly cars and trucks (much more than nowadays), smog... We complain about 
> pollution but forget that already a very long way has been travelled.
> 
> Thomas
> 
> 
Not by personal experience, but just by looking at old photographs on 
the Montreal skyline dating back to the 30's and 40's, then going to the 
approximate place from where those photos where taken can be instructive.

Back then, from the Mount Royal, you just can't see the horizon, in any 
direction. There was that low lying bank of dark gray smoke in the way.
Now, with a population over 20 time larger and largely more than 1000 
times more cars in the streets, you can see the horizon.
(most of the areas now covered by the city where fields)

Back then, the outer wall of any brick or granite house more than 5 
years old where mostly black.
Now, those same walls have recovered ther original colours, mostly due 
to the rain.

And, now, old peoples that lived during that time are complaining about 
the polution levels we expeiencing now... And say that in ther time 
there was no polution.
In my view, it's just that back then, nobody imagined that the polution 
could be mesured. Some did'nt even know of the word...

Now, there are trees in the city that bear some moss and/or lichen. 20 
years ago, NO trees had any moss nor lichen.


Alain

Post a reply to this message

You are completely right. While this was before my time, here is a link to 
"The great smog of London 1952", three days of smog causing 4000 dead, 
leading to anti-pollution legislation.

http://www.museumoflondon.org.uk/English/Collections/OnlineResources/X20L/themes/1388/1111

Post a reply to this message

Alain schrieb:
> Back then, the outer wall of any brick or granite house more than 5 
> years old where mostly black.
> Now, those same walls have recovered ther original colours, mostly due 
> to the rain.

This is how the spires of the Cologne Cathedral look like today:

   http://en.wikipedia.org/wiki/File:Koelner-dom-spire.jpg

And this is a photograph from ca. 1880:

   http://en.wikipedia.org/wiki/File:Detail,_Cologne_Cathedral_Tower.jpg

Note that the cathedral is - at least in parts - 750 years old. The dark 
color seen today is almost exclusively from soot, probably most of it 
from the nearby central railway station (the cathedral is just some 100 
meters from the platforms).

The soot has "eaten" its way so deep into the stone that any attempt to 
wash it off is futile. Only in the process of restoration of other 
damage does the cathedral regain its original bright color again in some 
sections.

Man, that must have been a beautiful building!

> And, now, old peoples that lived during that time are complaining about 
> the polution levels we expeiencing now... And say that in ther time 
> there was no polution.

Well, the pollution was entirely different. I'm not sure whether it was 
any better or worse back then: I'm sure it was more obviously bad, but 
given that we're consuming far more energy these days, I guess the grand 
total of today's emissions is just as bad.

For instance, there appears to be a correlation between particulates 
(which weren't that much of a problem in historic times, most of the 
emitted sold matter having been bound in larger, visible particles) and 
pollen allergies (i.e. people seem to more readily develop hayfever in 
regions with strong particulate pollution).

Post a reply to this message

Jörg 'Yadgar' Bleimann wrote:
> High!
> 
> Jim Charter wrote:
> 
>> You remember steam locomotives???  I'm gobsmacked!
> 
> 
> Here in (Western) Germany, the last ones were put out of operation in 
> 1977... so I would not be too young to remember regular steam trains, 
> but I hardly can remember any travels by train at all in my childhood 
> days, as my parents both had a driving license and for a family of four, 
> travelling by car was much cheaper than taking any train back then.

I also remember steam trains from my young days, but also not from 
riding them, rather from living near a train station (freight, not 
passengers, however).  Our house was about half a block from the tracks, 
and I remember that it would shake when the trains rolled by.  Of 
course, this got to be so normal it became barely noticeable.  But I 
also remember when we had out-of-town relatives visiting us who had kids 
around my age (pre-teen at the time), trains were a novelty to them and 
they'd run out to the street to be able to see them when they heard or 
felt them.

> Nowadays, I'm a die-hard train traveller (no car and no license - it's 
> my ecological creed!),

Well, I'm still not a train-traveler, and since I've lived virtually my 
whole life in Southern California I can't get along without driving a 
car.  It might not be politically or ecologically correct, but it is a 
reality.  :-)  I got my first license when I was 16, I'm now 72 and NOT 
ready to give up my car.

>                        but I never had the chance to ride on a "museum 
> train"... which would not please me that much, as I'm more into 
> hyper-modern high-speed trains (as you see in my current POV-Ray 
> project), zooming across France in a TGV or doing Japan by Shinkansen, 
> that's me!

One "museum train" I have ridden is in the redwood area of Northern 
California (spent MANY vacations camping in that beautiful area).  This 
is an old redwood logging train that is now strictly a tourist 
attraction.  It's called the Skunk Train -- it got that name in the 
logging days because they said you could smell it long before hearing or 
seeing it coming.  (It's no longer smelly, of course, but they kept that 
historic name.)  Check their website, www.skunktrain.com, to see the 
type of scenic area it goes through.

> See you in Khyberspace!
> 
> Yadgar
> 
> Now playing: Juan Charrasqueado (Mariachi Nacional)

      -=- Larry -=-

Now playing:  Art of the Fugue, The New York Woodwind Quintet

Post a reply to this message

clipka escribió:
> A long day's work. Pure SDL job so far. Still a looooooooooooong way to 
> go though.
> 
> Comments so far, anyone?

   Very good modeling... can I guess you did come up with the rad-proximity
hack just for this? ;)

   I'm trying to remember the name of the guy that years ago modeled some
very detailed and accurate trains with POV-Ray CSG... well, I give up... my
memory is usually good for names, but this time I had to google it: it was
David S. Merchant :

   http://www.nesys.com/images/pov/3d_berk.html

   Seems he is inactive for some years now: his page wasn't updated for 10
years. I hope he is doing well...

--
Jaime

Post a reply to this message

Jaime Vives Piqueres schrieb:
>   Very good modeling... can I guess you did come up with the rad-proximity
> hack just for this? ;)

Indeed. You gotta have dirt on these things - *lots* of dirt - and it 
must match the detail level of it, so it's probably a safe bet that a 
df3-based approach is prohibitive. Memory consumption should be ok (some 
300 MB of raw data should give me a resolution of 0.5 inch, which should 
suffice), but generating that data with a trace()-based SDL script... 
*DO NOT WANT!* >_<

>   I'm trying to remember the name of the guy that years ago modeled some
> very detailed and accurate trains with POV-Ray CSG... well, I give up... my
> memory is usually good for names, but this time I had to google it: it was
> David S. Merchant :
> 
>   http://www.nesys.com/images/pov/3d_berk.html

Duh. Not bad, just about what I'm going for (except that it's a 2-8-4, 
not a 2-8-2, but my choice was just due to what blueprints I could find 
on the net for free).

Though this work of his appears to be actually even closer to what I 
/really/ want:

http://www.irtc.org/irtc/irtc?_n&pg=ViewSubmission&id=StillImages_May-June1999_giants.jpg

Unfortunately I don't have blueprints of such a giant. And even more 
unfortunately, Dave didn't publish the SDL code... *DO WANT!* >_<

Post a reply to this message

clipka a écrit :
> Alain schrieb:
>> Back then, the outer wall of any brick or granite house more than 5 
>> years old where mostly black.
>> Now, those same walls have recovered ther original colours, mostly due 
>> to the rain.
> 
> This is how the spires of the Cologne Cathedral look like today:
> 
>   http://en.wikipedia.org/wiki/File:Koelner-dom-spire.jpg
> 
> And this is a photograph from ca. 1880:
> 
>   http://en.wikipedia.org/wiki/File:Detail,_Cologne_Cathedral_Tower.jpg
> 
> Note that the cathedral is - at least in parts - 750 years old. The dark 
> color seen today is almost exclusively from soot, probably most of it 
> from the nearby central railway station (the cathedral is just some 100 
> meters from the platforms).
> 
> The soot has "eaten" its way so deep into the stone that any attempt to 
> wash it off is futile. Only in the process of restoration of other 
> damage does the cathedral regain its original bright color again in some 
> sections.
> 
> Man, that must have been a beautiful building!
> 
>> And, now, old peoples that lived during that time are complaining 
>> about the polution levels we expeiencing now... And say that in ther 
>> time there was no polution.
> 
> Well, the pollution was entirely different. I'm not sure whether it was 
> any better or worse back then: I'm sure it was more obviously bad, but 
> given that we're consuming far more energy these days, I guess the grand 
> total of today's emissions is just as bad.
> 
> For instance, there appears to be a correlation between particulates 
> (which weren't that much of a problem in historic times, most of the 
> emitted sold matter having been bound in larger, visible particles) and 
> pollen allergies (i.e. people seem to more readily develop hayfever in 
> regions with strong particulate pollution).

Conserning hay feever and other alergies, there is a possible corelation 
with the general hygien levels and the use and over use of cleaning.

When a baby or chold imune system is not sufisiently solicited, it don't 
learn to make the difference between harmfull things, like virus and 
bacteria, and hamless things like odrinary dust, earth, polens and some 
food stuff.

Some studies seems to demonstrate that a baby who grew in a aseptised 
environment could be about 1000+ times more suceptible to devlop 
alergies than one who grew in a more hygien relaxed environment.



Alain

Post a reply to this message

"Alain" <aze### [at] qwertyorg> schreef in bericht 
news:4a907307$1@news.povray.org...
> Conserning hay feever and other alergies, there is a possible corelation 
> with the general hygien levels and the use and over use of cleaning.
>
> When a baby or chold imune system is not sufisiently solicited, it don't 
> learn to make the difference between harmfull things, like virus and 
> bacteria, and hamless things like odrinary dust, earth, polens and some 
> food stuff.
>
> Some studies seems to demonstrate that a baby who grew in a aseptised 
> environment could be about 1000+ times more suceptible to devlop alergies 
> than one who grew in a more hygien relaxed environment.
>

That seems indeed to be true. It is often adviced nowadays (to children 
*and* adults) not to be afraid too much of a little dirt... especially in 
the cities. Country people are far less subject to allergies and such. They 
have acquired a better resistance.

Thomas

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Thomas de Groot wrote:
> "Alain" <aze### [at] qwertyorg> schreef in bericht 
> news:4a907307$1@news.povray.org...
>> Conserning hay feever and other alergies, there is a possible corelation 
>> with the general hygien levels and the use and over use of cleaning.
<Snippage>
> 
> That seems indeed to be true. It is often adviced nowadays (to children 
> *and* adults) not to be afraid too much of a little dirt... especially in 
> the cities. Country people are far less subject to allergies and such. They 
> have acquired a better resistance.
> 
> Thomas
> 
> 
Judging from personal experience, and comparing notes with another "old 
F***", in our families the allergies are few.  He has none, sharing this 
with most of his family, I have two, blueberries and penicillin.  Both 
of us were raised in basically a farm environment, he being raised on 
the family farm, me being raised next to several farms.  This included 
going into the old barns with floors of dirt and "other things", with no 
ill effects that we know of.  I go one step further than he, I have no 
sensitivity to poison oak, ivy or sumac.  However I am aware that if I 
expose myself too much, I could develop that.

And we both can remember the black smoke of steam trains, but I seem to 
remember that the first diesels we saw were also pouring black smoke. 
At that time, no coal, just oil burning for the steamers.

Rich.

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clipka <ano### [at] anonymousorg> wrote:
> A long day's work. Pure SDL job so far. Still a looooooooooooong way to
> go though.
>
> Comments so far, anyone?
>
> (Anyone can guess the engine type already? Um, well, not bloody likely I
> bet..)
>
> Next thing on the agenda: Get the square-ish firebox fused with the
> round boiler... I wonder how I ever gonna make /that/...

This reminds me of a train I modelled several years ago (the royal scot) it was
pretty much the last image I did, in fact the effort probably finished be off..
;-) Hope it doesn't have the same effect on you..

The image and source is on the irtc site:

http://www.irtc.org/ftp/pub/stills/2006-08-31/oldroyal.jpg

I even had a go at animating the wheels..

Sean

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Attachments:
Download 'animation2.gif' (1293 KB)

Preview of image 'animation2.gif'

s.day schrieb:
> http://www.irtc.org/ftp/pub/stills/2006-08-31/oldroyal.jpg
> 
> I even had a go at animating the wheels..

That's really impressive quality. (You're aware though that the 
animation must be from a train going downhill? The reverse lever is 
apparently at neutral, effectively locking the valve in dead center 
position so it doesn't admit any steam to the cylinder...)

Would you mind me using parts of your code? (Probably not, or you 
wouldn't have published the code in the first place, but I rather ask 
anyway.)

Post a reply to this message

clipka <ano### [at] anonymousorg> wrote:

> That's really impressive quality. (You're aware though that the
> animation must be from a train going downhill? The reverse lever is
> apparently at neutral, effectively locking the valve in dead center
> position so it doesn't admit any steam to the cylinder...)
>
> Would you mind me using parts of your code? (Probably not, or you
> wouldn't have published the code in the first place, but I rather ask
> anyway.)

I didn't know how the levers work and the train was modelled from photos found
on the web so I was pretty sure it wasn't very accurate as most of the images
didn't show the wheels/levers in enough detail to model and I had no idea how
they should move.

When I modelled the train I had lots of scenes in my head that I was planning to
use it in but never got the carriages finished (I ran out of steam :~o ).

I would be glad to see any part of it in another picture so you are free to use
it (if you can make anything from my poorly written/commented code).

Sean

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AWESOME good looking animation! Just let the wheels turn in the right 
direction...

The wheels turn clockwise when the motive gear turns anti-clockwise? Is this 
an error in the animation or am I missing something? Even going downhill the 
wheels should turn the same direction as the gears.

BTW: here's a link to an animation (less beautiful - more technical)

http://en.wikipedia.org/wiki/File:Walschaerts_motion.gif


"clipka" <ano### [at] anonymousorg> schrieb im Newsbeitrag 
news:4a946d82$1@news.povray.org...
> s.day schrieb:
>> http://www.irtc.org/ftp/pub/stills/2006-08-31/oldroyal.jpg
>>
>> I even had a go at animating the wheels..
>
> That's really impressive quality. (You're aware though that the animation 
> must be from a train going downhill? The reverse lever is apparently at 
> neutral, effectively locking the valve in dead center position so it 
> doesn't admit any steam to the cylinder...)
>
> Would you mind me using parts of your code? (Probably not, or you wouldn't 
> have published the code in the first place, but I rather ask anyway.)
>

Post a reply to this message

"TC" <do-not-reply@i-do get-enough-spam-already-2498.com> wrote:
> AWESOME good looking animation! Just let the wheels turn in the right
> direction...
>
> The wheels turn clockwise when the motive gear turns anti-clockwise? Is this
> an error in the animation or am I missing something? Even going downhill the
> wheels should turn the same direction as the gears.
>
> BTW: here's a link to an animation (less beautiful - more technical)
>
> http://en.wikipedia.org/wiki/File:Walschaerts_motion.gif
>
>

Thanks for the link, the wheels are turning in the right direction, it is just
an illusion that make it look like they are not. The whole wheel object is
rotated so if they were not turning the correct way the part where the lever is
attached would also go the wrong way.

Even though I knew this I had to colour the spokes individually to make sure I
had not made some mistake somewhere as the effect just doesn't look right.

Sean

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"s.day" <s.d### [at] uelacuk> schreef in bericht 
news:web.4a946587d8f21fa2b51465700@news.povray.org...
> This reminds me of a train I modelled several years ago (the royal scot) 
> it was
> pretty much the last image I did, in fact the effort probably finished be 
> off..
> ;-) Hope it doesn't have the same effect on you..
>

That was an inspirational image, I remember. Still one of my top favourites.

I sincerely hope you will be back with us. Pity to have stopped...

Thomas

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"Thomas de Groot" <tDOTdegroot@interDOTnlANOTHERDOTnet> wrote:
> That was an inspirational image, I remember. Still one of my top favourites.
>
> I sincerely hope you will be back with us. Pity to have stopped...
>
> Thomas

Hi Thomas,

Thanks, I'm glad the effort was worth it. I recently found out the IRTC has been
resurrected so with only 2 weeks to go have attempted to put together an image
for the first round (this made me realise how rusty I am though, can't believe
it was 2006 last time I did an image..)

Not entirely happy with it but I will submit it and hope to do better in the
next round.

Sean

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s.day wrote:
...
> 
> Thanks for the link, the wheels are turning in the right direction, it is just
> an illusion that make it look like they are not. The whole wheel object is
> rotated so if they were not turning the correct way the part where the lever is
> attached would also go the wrong way.
> 
> Even though I knew this I had to colour the spokes individually to make sure I
> had not made some mistake somewhere as the effect just doesn't look right.
> 
> Sean
> 

It's just the same stroboscopic effect you often see in movies where the 
wagon wheels appear to go backward.

It's basically this -- assume for example, the spokes are 10 degrees 
apart and the timing lets them move 8 degrees clockwise each frame. 
This will give the appearance of them moving 2 degrees counterclockwise 
each frame.  Perhaps you can play with the timing to come up with better 
results, but I have no specific suggestions of how to do this.

      -=- Larry -=-

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In this case the solution is easy: simply add more frames (or less). I'd try 
either 17 or 34. If I've counted right then at 21 frames the wheels should 
seem to stand still ;-)

Then, since you already have 25 frames, why not go for 50 frames?

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TC a écrit :
> AWESOME good looking animation! Just let the wheels turn in the right 
> direction...
> 
> The wheels turn clockwise when the motive gear turns anti-clockwise? Is this 
> an error in the animation or am I missing something? Even going downhill the 
> wheels should turn the same direction as the gears.
> 
> BTW: here's a link to an animation (less beautiful - more technical)
> 
> http://en.wikipedia.org/wiki/File:Walschaerts_motion.gif
> 
> 
> "clipka" <ano### [at] anonymousorg> schrieb im Newsbeitrag 
> news:4a946d82$1@news.povray.org...
>> s.day schrieb:
>>> http://www.irtc.org/ftp/pub/stills/2006-08-31/oldroyal.jpg
>>>
>>> I even had a go at animating the wheels..
>> That's really impressive quality. (You're aware though that the animation 
>> must be from a train going downhill? The reverse lever is apparently at 
>> neutral, effectively locking the valve in dead center position so it 
>> doesn't admit any steam to the cylinder...)
>>
>> Would you mind me using parts of your code? (Probably not, or you wouldn't 
>> have published the code in the first place, but I rather ask anyway.)
>>
> 
> 
> 
It's just an illusion.
You can, sometimes, see just the same in a movie.

I remember one where you see a big agricole tractor spoked weel complete 
with heavy treads and 2 circles of bolts. You had the illusion that the 
treads and one circle of bolts where turning backward, at different 
speeds, one circle of bolts turned veeeeryyyy sloooowly in the right 
ditection, and the spokes turned to fast in the correct direction.

It was facinating :)


Alain

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s.day schrieb:

> This reminds me of a train I modelled several years ago (the royal scot) it was
> pretty much the last image I did, in fact the effort probably finished be off..
> ;-) Hope it doesn't have the same effect on you..

Well, I guess by now I'm getting a feeling of what you're talking about...

(still on the :-) side though... I think.)

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