Alessandro Coppo wrote:
> 
> > Michael Kent wrote:
> >
> > > Hello everyone,
> > >
> > > I've decided that it's time for POVRay to have a place to live, a
> > > place to call home, so I'm building it a city.
> 
> Is POV-Ray city back? It would be great!
> 
> a.c### [at] iolit
> www.geocities.com/SiliconValley/Way/8111/

It's predecessor. Pov Main Street, can be found at:

http://www.geocities.com/SiliconValley/Lab/6080/

-- 
Ken Tyler
  
mailto://tylereng@pacbell.net
http://home.pacbell.net/tylereng/links.htm

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Ken wrote:

> It's predecessor, Pov Main Street, can be found at:

Predecessor was not the correct term since Pov Main Street is the continuation
of the original. 

-- 
Ken Tyler
  
mailto://tylereng@pacbell.net
http://home.pacbell.net/tylereng/links.htm

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>>Predecessor was not the correct term since Pov Main Street is the
continuation
>>of the original.

Yea!  And with one contributor and my stuff, it's a pretty neked place.

All I ask is for a building or two from each contributor... in metric scale
1 meter=1 pov unit.

Robert J Becraft
aka cas### [at] aolcom

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Robert J Becraft wrote:

> Yea!  And with one contributor and my stuff, it's a pretty neked place.
> 
> All I ask is for a building or two from each contributor... in metric scale
> 1 meter=1 pov unit.
> 
> Robert J Becraft
> aka cas### [at] aolcom

Who won the argument in this thread about Y = UP ?

-- 
Ken Tyler
  
mailto://tylereng@pacbell.net
http://home.pacbell.net/tylereng/links.htm

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Ken wrote:
> 
> Who won the argument in this thread about Y = UP ?
> 

This argument can be won?!
Without military backup?

Margus

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Margus Ramst wrote:
> 
> Ken wrote:
> >
> > Who won the argument in this thread about Y = UP ?
> >
> 
> This argument can be won?!
> Without military backup?
> 
> Margus

  Well I have been threatening to nuke people over on c.g.r.r. I could as
easily extend the same courtesy warning here ; >)

-- 
Ken Tyler
  
mailto://tylereng@pacbell.net
http://home.pacbell.net/tylereng/links.htm

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Brook Monroe wrote:

> The Y axis is UP?  What country did YOU study geometry in? <G> This is
> going to ruddy well make things difficult to produce in Moray, you know.

    It was one of those fantasy POV universes not just a country.

    As to the general issue, consider writing ascii to the screen in the old
days or even today if anyone is still into it. 0,0 is top left corner, x
increases to the right, y down. It really sucked. With me so far?

    Now the right hand rule to find increasing Z it to "wrap" x into y and
your thumb points at z. With the above system z increases into the screen.
Voila!!! POV-ray. Rather the first incarnation when it was called something
else entirely.

    The next step is to set an arbitrary origin with respect to where the
camera looks. Once you do that 0,0 is no longer in the upper left corner.
This presents a minor problem in conceptualization. X still increases to the
right but y is down that is very annoying to most everyone with math
experience, even those who avoided math as much as possible. But since it is
arbitrary make it up just like all the early computers users thought it
should have been, with 0,0 in the lower left.

    Now where are we? We have corrected the major annoyance of the first
computer screens. However we have that annoying right hand rule making z
increasing coming out of the screen as opposed to the original which was the
opposite and what it is now.

    But which direction z increases is arbitrary so lets make it intuitive.
How far away is an object? The farther away the larger the number, intuitive
with the image.

    Second to lastly, someone comes back and says that is a left-handed
coordinate system. Not that it matters once you simply memorize the
directions of the ups.

    Lastly the docs get all technical on us and start off with saying it is
a left-handed and start confusing people "right" and "left" to so speak.

    Finally there is a solution! Rats become commonplace. Most people are
right handed. Only their left hands are free to figure out which way is up.

    And we have so many POV-ray users who consult their left hands before
getting out of bed so they don't fall to the ceiling. They are among the few
who have to think before they know which way is up.

> I'd like a plot in this little burg of yours, but I'm afraid that it'll
> never work since I'll be using Moray.

    Real men don't use modelers. ;)

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Kardal wrote:

> Being an American, using the metric system (1 unit = 25 meters) will be alien
> to me as well.  That is not so easily fixed.

    1 meter is 39.36 or for government work, 3 feet plus 10%. 100 meter 330 feet.
3*meters + .1*3*meters.

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Brook Monroe wrote:
> I'd like a plot in this little burg of yours, but I'm afraid that it'll
> never work since I'll be using Moray.

The two most useful transformations to know if you work back and 
forth between POV's native left handed system and Moray's 
pseudo-right handed system:

For any native POV creation you want to #include into a
Moray scene:

/*LHC -> RHC conversion*/ rotate 90*x scale <1,-1,1>

For any Moray creation you want to use in a native POV LHC
system...

/*RHC -> LHC conversion*/ rotate -90*x  scale <1,1,-1>

 
Matt Giwer wrote:
>>   Real men don't use modelers. ;)

Heh. Real raytracers can freely convert between both in their sleep,
and consider text editors just another form of specialty modeller.
:)


--
Charles

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Charles Fusner wrote:
> 
> Brook Monroe wrote:
> > I'd like a plot in this little burg of yours, but I'm afraid that it'll
> > never work since I'll be using Moray.
> 
> Heh. Real raytracers can freely convert between both in their sleep,
> and consider text editors just another form of specialty modeller.

Wait a minute... you mean vi *isn't* a modeller??
<grin>

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