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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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Is this project still active? All the links are dead now, but I live in
hope that it's merely been moved...
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.
> The first phase of the building is a series of 9 * 9 blocks, with
> roads 1 unit wide seperating them.
> Phase 2 will be a park, shopping complex, residential area and
> whatever else I think of.
>
> If YOU would like to build in POVRay City mail me and I will allocate
> you a plot. You then mail me your scene file, and I will "include" it
> in the city scene file. I will put all of the scene files on my web
> page so that anyone who wants to can get them and trace the city.
>
> Anyone interested ????
>
> HTTP://homepages.enterprise.net/michaelkent
> e-mail mic### [at] enterprise net
> Fidonet 2:258/69.10
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On Thu, 22 Nov 2001 12:02:47 +0000, s1631001 wrote:
> Is this project still active? All the links are dead now, but I live in
> hope that it's merely been moved...
As far as I know, it's dead. It's been at least three years since I heard
anything about it.
--
#macro R(L P)sphere{L F}cylinder{L P F}#end#macro P(V)merge{R(z+a z)R(-z a-z)R(a
-z-z-z a+z)torus{1F clipped_by{plane{a 0}}}translate V}#end#macro Z(a F T)merge{
P(z+a)P(z-a)R(-z-z-x a)pigment{rgbt 1}hollow interior{media{emission T}}finish{
reflection.1}}#end Z(-x-x.2y)Z(-x-x.4x)camera{location z*-10rotate x*90}
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"Ron Parker" <ron### [at] povrayorg> wrote in message
news:slr### [at] fwicom...
> On Thu, 22 Nov 2001 12:02:47 +0000, s1631001 wrote:
> > Is this project still active? All the links are dead now, but I live in
> > hope that it's merely been moved...
>
> As far as I know, it's dead. It's been at least three years since I heard
> anything about it.
There is at least one place I found about it.
http://www.geocities.com/SiliconValley/Lab/6080/povcity.htm
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I'm remaking my website at the minute, so do you think anyone would be interested if
I were to resurrect POV-City as part of it? (Obviously I'll Need Michael's
premission first)
From the Grey Knight
//@---signature---
// Grey Knight's site of the week: http://mathworld.wolfram.com
Ron Parker wrote:
> On Thu, 22 Nov 2001 12:02:47 +0000, s1631001 wrote:
> > Is this project still active? All the links are dead now, but I live in
> > hope that it's merely been moved...
>
> As far as I know, it's dead. It's been at least three years since I heard
> anything about it.
>
> --
> #macro R(L P)sphere{L F}cylinder{L P F}#end#macro P(V)merge{R(z+a z)R(-z a-z)R(a
> -z-z-z a+z)torus{1F clipped_by{plane{a 0}}}translate V}#end#macro Z(a F T)merge{
> P(z+a)P(z-a)R(-z-z-x a)pigment{rgbt 1}hollow interior{media{emission T}}finish{
> reflection.1}}#end Z(-x-x.2y)Z(-x-x.4x)camera{location z*-10rotate x*90}
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If I was to incorporate POV-City in my forthcoming website, would there
still be interest in it? I don't want to step on POV-Street's toes, so
perhaps we could work something out between us?
Ron Parker wrote:
>
> On Thu, 22 Nov 2001 12:02:47 +0000, s1631001 wrote:
> > Is this project still active? All the links are dead now, but I live in
> > hope that it's merely been moved...
>
> As far as I know, it's dead. It's been at least three years since I heard
> anything about it.
>
> --
> #macro R(L P)sphere{L F}cylinder{L P F}#end#macro P(V)merge{R(z+a z)R(-z a-z)R(a
> -z-z-z a+z)torus{1F clipped_by{plane{a 0}}}translate V}#end#macro Z(a F T)merge{
> P(z+a)P(z-a)R(-z-z-x a)pigment{rgbt 1}hollow interior{media{emission T}}finish{
> reflection.1}}#end Z(-x-x.2y)Z(-x-x.4x)camera{location z*-10rotate x*90}
--
From the Grey Knight
//@---signature---
// Grey Knight's site of the week:
url{ "http://mathworld.wolfram.com" }
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slr### [at] fwicom...
> As far as I know, it's dead. It's been at least three years since I heard
> anything about it.
I remember that the first (and last) time I was there there was a building
with a big swastika right in front... It was a little bit strange, to say
the less, and may have had something to do with the disappearance of the
project.
G.
--
**********************
http://www.oyonale.com
**********************
- Graphic experiments
- POV-Ray and Poser computer images
- Posters
> --
> #macro R(L P)sphere{L F}cylinder{L P F}#end#macro P(V)merge{R(z+a z)R(-z
a-z)R(a
> -z-z-z a+z)torus{1F clipped_by{plane{a 0}}}translate V}#end#macro Z(a F
T)merge{
> P(z+a)P(z-a)R(-z-z-x a)pigment{rgbt 1}hollow interior{media{emission
T}}finish{
> reflection.1}}#end Z(-x-x.2y)Z(-x-x.4x)camera{location z*-10rotate x*90}
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