Eero Ahonen <aer### [at] removethiszbxtnetinvalid> wrote:

> Though I wouldn't consider raytracing as geeky hobby. I think it's more
> mathematical hobby.
>
> -Aero

Exactly, math is key, hence my triangulation.inc:

I wrote it and would be lost without it, because just figuring all that stuff
out doesn't mean I memorized it, I only know how to use it. I saw the some math
show on pbs about 8 years ago and hit record on the VCR, it was sine and cosine
laws. Everything fell into place after that ...

******************************************************************************
Triangulation.inc      ABC=vectors abc=floats

3D Macros:
  incenter(A,B,C)
  centroid(A,B,C)
  ccenter(A,B,C)                   circumcenter
  orthocenter(A,B,C)
  normal_vector(A,B,C)
  midpoint(A,B)

  rotation(r,Axis,Point)
  _rotate(sine,cosine,Axis,Point)

  circumradius(A,B,C)              float
  inner_radius(A,B,C)              float
  radang3(A,B,C)                   Angle at B in radians
  pyramid_volume(A,B,C,D,E)
  tetrahedron_volume(A,B,C,D)

Functions:
  inneradius(a,b,c)      3 lens
  outeradius(a,b,c)

  sss_area(a,b,c)
  sas_area(s,a,s2)
  bh_area(b,h)           Base Height

  sss_height(a,b,c)      height to side2
  sas_cos(s,a,s2)        Side Angle Side - solve length of missing side

  aas_sin(a,b,s)         AAS solve opposing side of angle2 (b)
  asa_sin(a,s,b)         ASA solve opposing side of angle2 (b)
  sss_cos(a,b,c)         SSS solve angle opposite side2    (b)
  ssa_acute(s,s2,a)      SSA solve angle opposite side2


Float Macros:
  ssa_obtuse(s,s2,a)
  sa_height(s,a)         Side Angle unknown base


etc

Post a reply to this message

"Thomas de Groot" <tDOTdegroot@interDOTnlANOTHERDOTnet> wrote:

> I still cannot remember the name... :-(  ...Age...   <grumbling in beard>
> Indeed, the bricks were white and red, and also transparant. They often did
> not hold too well either.
>
> Thomas


Yah I noticed something about my new LEGO set; once you place them, they dont
ever fall apart while you're trying to build something, cool! sticky LEGO

Post a reply to this message

Thomas de Groot wrote:
> "stbenge" <^@hotmail.com> schreef in bericht
>> Thomas de Groot wrote:
>>> "clipka" <nomail@nomail> schreef in bericht
>>>> (*... wanders off into nostalgic dreams...*)
>>>>
>>> We, grumbling old men, lwe ived before your blessed Lego generation :-)
>> Hah, I knew it :)
> 
> <grin>

We all get older, and there's nothing wrong with that :)

>>> with! Ah! Those were the days! I also owned a kind of forerunner to Lego 
>>> (don't remember the name just now) also with plastic bricks but a bit 
>>> larger...
>> American Building Bricks? For building houses mainly? If so, we had some 
>> hand-me-downs from our mother. Red and white blocks mostly, with smaller, 
>> narrower pegs which didn't hold tight. We had a very incomplete set 
>> though...
>>
> I still cannot remember the name... :-(  ...Age...   <grumbling in beard>
> Indeed, the bricks were white and red, and also transparant. They often did 
> not hold too well either.

What you describe sounds like the ones we had. My dad swears to the name 
I mentioned, though the last word might be Blocks and not Bricks.

Sam

Post a reply to this message

alphaQuad wrote:
> Eero Ahonen <aer### [at] removethiszbxtnetinvalid> wrote:
> 
>> Though I wouldn't consider raytracing as geeky hobby. I think it's more
>> mathematical hobby.
>>
>> -Aero
> 
> Exactly, math is key, hence my triangulation.inc:
> 
> I wrote it and would be lost without it, because just figuring all that stuff
> out doesn't mean I memorized it, I only know how to use it. I saw the some math
> show on pbs about 8 years ago and hit record on the VCR, it was sine and cosine
> laws. Everything fell into place after that ...

Thanks to my older brother and his Tandy Color Computer talents, I 
learned the ways of sin/cos before POV. The loop is the engine, sin/cos 
are two parts of a gear, and pi is the number of teeth. It's too much 
fun sometimes :)

Sam

Post a reply to this message

On Wed, 31 Dec 2008 17:12:06 +0200, Eero Ahonen
<aer### [at] removethiszbxtnetinvalid> wrote:

>Stephen wrote:
>> On Wed, 31 Dec 2008 09:20:32 +0100, "Thomas de Groot"
>> <tDOTdegroot@interDOTnlANOTHERDOTnet> wrote:
>> 
>>> I have the hunch that the average age of these groups is higher than you 
>>> imagine.... :-)
>>>
>> 

>
>...radiosity settings
>

LOL Hamlet :)
 
>>> And geeks come indeed at any age... but we take our hobby veeeerrrryyyy 
>>> seriously!
>> 
>> Indeed we do ;)
>
>Though I wouldn't consider raytracing as geeky hobby. I think it's more
>mathematical hobby.
>

Artistic perchance?

With a litle bit of hard sums thrown in ;)
-- 

Regards
     Stephen

Post a reply to this message

Eero Ahonen wrote:
> Larry Hudson wrote:
> 
>>I was born in '37 so I'm also a grumbling old man (more of a curmudgeon
>>actually).   ;-)   So my childhood was also pre-plastics.  My equivalent
>>nostalgia is for (all metal) Erector Sets.
> 
> 
> I have a strange feeling that that name would be considered somewhat
> weird and/or unsuitable for children's set.
> 
LOL

Nevertheless, "Erector Sets" as they were called, were very well known 
and popular toy construction sets at that time (late 40's, early 50's or 
so).  I had great fun with mine -- a mid-range set.  Always dreamed of 
having their biggest set, but could never afford it -- or rather, my 
parents couldn't.  ;-)  Of course, earlier than this were the all-wood 
Tinker Toys, also very well-known and popular at the time.

Tinker Toys consisted of a bunch of wooden wheels and rods (dowels) of 
various lengths.  I don't remember any other shapes, but there might 
have been.  The wheels had a hole in their center and eight more around 
the rim where the rods could be inserted to connect them.  The ends of 
the rods had a slight taper and a narrow slit.  This slit gave tnem a 
slight springiness, and could also take other things like strings as 
additional ways of connecting them.

Going by my very imperfect memory, they looked somewhat like the 
attached picture.

Tinkey Toys were more for toddlers and Erector Sets more for "budding 
engineers"  ;-)  Of course, sadly, these days something like an original 
Erector Set could never make it to market -- too dangerous.  Lots of 
nuts and bolts and stuff that could be swallowed, and the pieces were 
thin sheet metal which could cut or poke an eye.  I really pity the 
current younger generation for being so coddled and overprotected.  "In 
my day", sure we got hurt, but that was just a normal part of growing 
up.  And we learned a lot on the way.

      -=- Larry -=-

Post a reply to this message

Attachments:
Download 'ttoy.png' (18 KB)

Preview of image 'ttoy.png'

Eero Ahonen wrote:
> Though I wouldn't consider raytracing as geeky hobby. I think it's more
> mathematical hobby.

I would say that math as a hobby is pretty geeky.    ;-)

      -=- Larry -=-

Post a reply to this message

Larry Hudson <org### [at] yahoocom> wrote:
> Eero Ahonen wrote:
> > Larry Hudson wrote:
> >
> >>I was born in '37 so I'm also a grumbling old man (more of a curmudgeon
> >>actually).   ;-)   So my childhood was also pre-plastics.  My equivalent
> >>nostalgia is for (all metal) Erector Sets.
> >
> >
> > I have a strange feeling that that name would be considered somewhat
> > weird and/or unsuitable for children's set.
> >
> LOL
>
> Nevertheless, "Erector Sets" as they were called, were very well known
> and popular toy construction sets at that time (late 40's, early 50's or
> so).  I had great fun with mine -- a mid-range set.  Always dreamed of
> having their biggest set, but could never afford it -- or rather, my
> parents couldn't.  ;-)  Of course, earlier than this were the all-wood
> Tinker Toys, also very well-known and popular at the time.
>
> Tinker Toys consisted of a bunch of wooden wheels and rods (dowels) of
> various lengths.  I don't remember any other shapes, but there might
> have been.  The wheels had a hole in their center and eight more around
> the rim where the rods could be inserted to connect them.  The ends of
> the rods had a slight taper and a narrow slit.  This slit gave tnem a
> slight springiness, and could also take other things like strings as
> additional ways of connecting them.
>
> Going by my very imperfect memory, they looked somewhat like the
> attached picture.
>
> Tinkey Toys were more for toddlers and Erector Sets more for "budding
> engineers"  ;-)  Of course, sadly, these days something like an original
> Erector Set could never make it to market -- too dangerous.  Lots of
> nuts and bolts and stuff that could be swallowed, and the pieces were
> thin sheet metal which could cut or poke an eye.  I really pity the
> current younger generation for being so coddled and overprotected.  "In
> my day", sure we got hurt, but that was just a normal part of growing
> up.  And we learned a lot on the way.
>
>       -=- Larry -=-

Yah must have got cut or hurt on the erector set a few times.
Lincoln Logs would be easy CSG for a log cabin.

Airy new age can't compare to Nostalgia Factor. Everything was so right, once
upon a time ...

Post a reply to this message

"stbenge" <^@hotmail.com> schreef in bericht 
news:495be481@news.povray.org...
>
> What you describe sounds like the ones we had. My dad swears to the name I 
> mentioned, though the last word might be Blocks and not Bricks.
>

Well, the name American Building Blocks (or Bricks) does not ring a name, 
but it might have been the same product, under another one. After all, in 
those days there were not dozens of different identical products. 
Interesting phraseology: different identical....  :-)

What I still own, is a wooden building blocks set I inherited from my uncle. 
It dates from before the first world war. It is probably german. The libel 
is gone for as long as I remember so I am not sure. It is beautifully made 
of plain, very fine-grained wood.

Thomas

Post a reply to this message

"alphaQuad" <alp### [at] earthlinknet> schreef in bericht 
news:web.495c4aa8877dfbf3722e572a0@news.povray.org...
>
> Yah must have got cut or hurt on the erector set a few times.
> Lincoln Logs would be easy CSG for a log cabin.
>
> Airy new age can't compare to Nostalgia Factor. Everything was so right, 
> once
> upon a time ...
>

...and with each day passing the nostalgia grows    :-)

Don't forget Meat Loaf's undying words: "Don't worry about the future, soon 
it will be the past" (or something like that)

Thomas

Post a reply to this message