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Well, I got the idea from illusionworks.com and I just had to try it.
What do you think? Is it more confusing that it's 4x4 and 3x3 at the
same time or that it eternally de/ascends? Is it worth developing into
a scene?
My other question is this. Is there any way to 'fake' perspective? Can
you map a texture so that it decreases in size with distance? I can't
take much more of this orthographic stuff...
- Rico
Post a reply to this message
Attachments:
Download 'staircase.jpg' (63 KB)
Preview of image 'staircase.jpg'
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HOW DO YOU PEOPLE DO THESE COOL THINGS!!!! ARRRRGGGGHHHH!!!!
-ok, I am better now....
wow, that is so cool!
nice job.
paul
Reusser wrote:
> Well, I got the idea from illusionworks.com and I just had to try it.
> What do you think? Is it more confusing that it's 4x4 and 3x3 at the
> same time or that it eternally de/ascends? Is it worth developing into
> a scene?
>
> My other question is this. Is there any way to 'fake' perspective? Can
> you map a texture so that it decreases in size with distance? I can't
> take much more of this orthographic stuff...
>
> - Rico
>
> ------------------------------------------------------------------------
> [Image]
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Paul wrote:
> HOW DO YOU PEOPLE DO THESE COOL THINGS!!!! ARRRRGGGGHHHH!!!!
Thanks. Seriously, take a look at illusionworks.com. Under "impossible
staircase", it has a couple drawings and a great sketch showing how it's done.
It's actually quite simple.
- Rico
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Reusser wrote:
>
> Well, I got the idea from illusionworks.com and I just had to try it.
> What do you think? Is it more confusing that it's 4x4 and 3x3 at the
> same time or that it eternally de/ascends? Is it worth developing into
> a scene?
IMO it looks good as it is, but adding some more absurdities could be
interesting of course.
I must admit i don't know how it works, could you post the geometry?
>
> My other question is this. Is there any way to 'fake' perspective? Can
> you map a texture so that it decreases in size with distance? I can't
> take much more of this orthographic stuff...
>
You can use a gradient pattern with a texture map and a lot of differently
scaled textures. Another possibility would ba a megapov displace warp.
Christoph
--
Christoph Hormann <chr### [at] gmx de>
IsoWood include, radiosity tutorial, TransSkin and other
things on: http://www.schunter.etc.tu-bs.de/~chris/
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Please don't post images like this on a Friday. It's been a hard week.
Any chance of an animated rotating version? (w/o radiosity unless you're feeling
maschocistic).
BTW Bravo.
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I remember seeing more complex version of this made in pov.
There is also audio version of the impossible staircase:
http://www.pp.htv.fi/kkivisal/down.mp3
_____________
Kari Kivisalo
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Kari Kivisalo wrote:
> There is also audio version of the impossible staircase:
> http://www.pp.htv.fi/kkivisal/down.mp3
Cool. The illusionworks website talked about this but it was in some
format that I didn't have the plugin for. It said that the pitch is
played in multiple octaves at the same time. The intensity of the pitch
in each octave is fit to a bell curve so each tone fades in, then out.
Thanks!
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Reusser wrote:
>
> It said that the pitch is
> played in multiple octaves at the same time. The intensity of the pitch
> in each octave is fit to a bell curve so each tone fades in, then out.
I made the sample with AudioMulch Risset Tone Generator. It also has
Risset Filter which has a filter bank instead of oscillator bank.
http://www.audiomulch.com
_____________
Kari Kivisalo
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Tom Melly wrote:
> Any chance of an animated rotating version? (w/o radiosity unless you're feeling
> maschocistic).
>
> BTW Bravo.
Thanks. It's on p.b.a. (with faked radiosity in the beginning ;) ).
Maschocistic? Websters is as puzzled as I am.
- Rico
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In article <3B3C901F.4943BEF6@chorus.net>, Reusser says...
> Well, I got the idea from illusionworks.com and I just had to try it.
> What do you think? Is it more confusing that it's 4x4 and 3x3 at the
> same time or that it eternally de/ascends? Is it worth developing into
> a scene?
>
> My other question is this. Is there any way to 'fake' perspective? Can
> you map a texture so that it decreases in size with distance? I can't
> take much more of this orthographic stuff...
>
> - Rico
>
> [image/jpeg,Unknown Document]
>
Really very shocking! I must have seen somewhere someplace how it works:
some kind of overlapping partial images ?
Do you know M.C. Escher's graphical work? Famous 'Waterfall' perpetuum
mobile type? Now if you could animate THAT, that would really be
astounding :-)
--
Regards, Sander
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Reusser wrote in message <3B3### [at] chorusnet>...
>
>Thanks. It's on p.b.a. (with faked radiosity in the beginning ;) ).
Ah!! Much appreciated. Sweet.
BTW any chance of posting either the code or putting a larger version on the
web - I've a hankering for a new desktop...
>
>Maschocistic? Websters is as puzzled as I am.
>
Should have been masochistic:
masochism /"mæs…'kîz(…)m/ n.
1 a form of (esp. sexual) perversion characterized by gratification derived
from one's own pain or humiliation (cf. SADISM).
2 colloq. the enjoyment of what appears to be painful or tiresome.
and I was thinking of the second sense...
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Tom Melly wrote:
> >Maschocistic? Websters is as puzzled as I am.
> >
>
> Should have been masochistic:
>
> masochism /"mæs…'kîz(…)m/ n.
> 1 a form of (esp. sexual) perversion characterized by gratification derived
> from one's own pain or humiliation (cf. SADISM).
> 2 colloq. the enjoyment of what appears to be painful or tiresome.
>
> and I was thinking of the second sense...
I prefer - schadenfreude \SHAH-dun-froy-duh\
: enjoyment obtained from the troubles of others
--
Ken Tyler
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Kari Kivisalo wrote:
>
> I remember seeing more complex version of this made in pov.
I think it was an IRTC entry by Sonya Roberts (BIG Maybe).
--
Ken Tyler
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Aha, I found it. It still baffles me after staring at this picture for a few
minutes how he managed to put it in perspective. Oh well, I guess that's the
advantage of two dimensional drawings versus three dimensional scenes.
http://www.worldofescher.com/gallery/AscendingDescendingLg.html
- Rico
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On Fri, 29 Jun 2001 22:28:45 +0100, Tom Melly wrote:
>masochism /"mæs…'kîz(…)m/ n.
Don't thing that regex is going to work:-)
--
Cheers
Steve email mailto:ste### [at] zeroppsuklinuxnet
%HAV-A-NICEDAY Error not enough coffee 0 pps.
web http://www.zeropps.uklinux.net/
or http://start.at/zero-pps
2:03am up 148 days, 2:54, 2 users, load average: 1.00, 1.10, 1.23
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Beautiful image.
--
Cheers
Steve email mailto:ste### [at] zeroppsuklinuxnet
%HAV-A-NICEDAY Error not enough coffee 0 pps.
web http://www.zeropps.uklinux.net/
or http://start.at/zero-pps
2:06am up 148 days, 2:58, 2 users, load average: 1.00, 1.05, 1.17
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>Really very shocking! I must have seen somewhere someplace how it works:
>some kind of overlapping partial images ?
>
>Do you know M.C. Escher's graphical work? Famous 'Waterfall' perpetuum
>mobile type? Now if you could animate THAT, that would really be
>astounding :-)
It has been animated...IRTC animation entry for April-July called "That's
Impossible"..
Oldstench................
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Reusser <reu### [at] chorusnet> wrote:
>Well, I got the idea from illusionworks.com and I just had to try it.
>What do you think? Is it more confusing that it's 4x4 and 3x3 at the
>same time or that it eternally de/ascends? Is it worth developing into
>a scene?
>
>My other question is this. Is there any way to 'fake' perspective? Can
>you map a texture so that it decreases in size with distance? I can't
>take much more of this orthographic stuff...
>
> - Rico
Great picture...any possibilty of posting the scene file? I am really
interested in your lighting and radiosity.
Oldstench................
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In article <lharjt4itm4gpnhu45a7ch4go67dtej8il@4ax.com>, Oldstench
says...
> >Do you know M.C. Escher's graphical work? Famous 'Waterfall' perpetuum
> >mobile type? Now if you could animate THAT, that would really be
> >astounding :-)
>
> It has been animated...IRTC animation entry for April-July called "That's
> Impossible"..
>
> Oldstench................
>
This one: http://www.worldofescher.com/gallery/WaterfallLg.html ?
--
Regards, Sander
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Oldstench wrote:
> Great picture...any possibilty of posting the scene file? I am really
> interested in your lighting and radiosity.
> Oldstench................
Well, okay. I cleaned up the code quite a bit. Now there's a variable so
you can change the height of each step and have the camera angle calculated
automatically, but I didn't do too much about optimizing the features. To
me, as long as it is finished by morning, it doesn't make too much of a
difference whether it takes four hours or eight. Also, the lighting just
consists of a yellow/orange area light with high intensity, and a blue sky
sphere for radiosity. That's about the extent of what you'll find in the
file, but I'll post it in p.b.s-f.
- Rico
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On Fri, 29 Jun 2001 18:52:05 -0700, Ken wrote:
>
>
>Kari Kivisalo wrote:
>>
>> I remember seeing more complex version of this made in pov.
>
>I think it was an IRTC entry by Sonya Roberts (BIG Maybe).
I think I've also seen a rework of that stuff by our very own
Bob H not sure which url, but they're both his:
http://users.aol.com/persistenceofv/all.htm
http://members.aol.com/persistenceofv/anims.htm
--
Cheers
Steve email mailto:ste### [at] zeroppsuklinuxnet
%HAV-A-NICEDAY Error not enough coffee 0 pps.
web http://www.zeropps.uklinux.net/
or http://start.at/zero-pps
11:42pm up 149 days, 33 min, 2 users, load average: 1.00, 1.02, 1.00
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"Steve" <ste### [at] zeroppsuklinuxnet> wrote in message
news:slr### [at] zero-ppslocaldomain...
> On Fri, 29 Jun 2001 18:52:05 -0700, Ken wrote:
> >
> >Kari Kivisalo wrote:
> >>
> >> I remember seeing more complex version of this made in pov.
> >
> >I think it was an IRTC entry by Sonya Roberts (BIG Maybe).
>
> I think I've also seen a rework of that stuff by our very own
> Bob H not sure which url, but they're both his:
>
> http://users.aol.com/persistenceofv/all.htm
> http://members.aol.com/persistenceofv/anims.htm
You made me go look, I never uploaded it to the web space FAIK though.
Wasn't my perpetual waterfall by Escher model anyhow, was one from a 3D site
with free models. I guess I only posted the rendering to
povray.binaries.images or the animation to p.b.a. because I remember some
comments on it. Mainly about that perspective trouble.
Noticed now that I'm not uploading anything lately since this brought that
to my attention, pretty pitiful of me.
Bob H.
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On Sun, 1 Jul 2001 03:41:06 -0500, Bob H. wrote:
>You made me go look, I never uploaded it to the web space FAIK though.
>Wasn't my perpetual waterfall by Escher model anyhow, was one from a 3D site
>with free models. I guess I only posted the rendering to
>povray.binaries.images or the animation to p.b.a. because I remember some
>comments on it. Mainly about that perspective trouble.
I think I remember a steriogram version too.
--
Cheers
Steve email mailto:ste### [at] zeroppsuklinuxnet
%HAV-A-NICEDAY Error not enough coffee 0 pps.
web http://www.zeropps.uklinux.net/
or http://start.at/zero-pps
1:16pm up 149 days, 14:08, 2 users, load average: 1.03, 1.10, 1.08
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"Reusser" <reu### [at] chorusnet> wrote in message
news:3B3E10D6.F2E2B1EE@chorus.net...
<snip>
Thanks - got a nice big version for my desktop now. One curiosity, when you know
what to look for, the radiosity gives the game away, since it is missing on the
fake join (i.e. the face of the step casts no colour onto the next step).
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Tom Melly wrote:
> Thanks - got a nice big version for my desktop now. One curiosity, when you know
> what to look for, the radiosity gives the game away, since it is missing on the
> fake join (i.e. the face of the step casts no colour onto the next step).
Hmmmm. Didn't think about that. If I had really been trying, I would have used
megapov's no_image statement on a fake step above the highest. Would that work or
would it be no better than no step? If not that, it would be possible to just put
a step cut in half so it could cast a shadow on the highest step while also showing
radiosity.
- Rico
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