check this out: http://www.geocities.com/Area51/3450/gallery/index.html
how does he do it?  how do you create a triangle like that, and how do you
create a reflection like that? anybody know how i can contact the dude?

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In article <3a280440@news.povray.org>, "DreyWerx" 
<you### [at] hotmailcom> wrote:

> how do you create a triangle like that,

You can't. :-)
However, you *can* make something that looks like that from a certain 
angle. The triangle doesn't actually connect, but the ends are in line 
with the point of view so it looks like the object is a closed triangle.


> and how do you create a reflection like that?

You could use MegaPOV features like no_reflection and no_image, or you 
could do fancy bounding so the object is only visible from certain 
points...there have been several discussions about these "phantom" or 
"ghost" objects in these newsgroups, especially in povray.general, 
povray.advanced-users, and povray.binaries.images. Or you could attempt 
to fake the mirror, put a sheet of glass there instead and duplicate 
mirror-images of the objects behind it, but this will be difficult, 
viewpoint-dependant, and still not quite accurate. That isn't done in 
this image, you can see the reflection of the ground is at a different 
angle and the illumination is what you would expect from a real mirror.


> anybody know how i can contact the dude?

Maybe searching for "Erwin Bonsma" on Google or Alltheweb would turn up 
an e-mail address, I didn't see one on the site.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

<><

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For a wonderful "tutorial" on building an impossible
object, check out the second place winner from July's
IRTC.  Says it better than words :-)

http://www.irtc.org/anims/2000-07-15.html


"DreyWerx" <you### [at] hotmailcom> wrote in message
news:3a280440@news.povray.org...
> check this out: http://www.geocities.com/Area51/3450/gallery/index.html
> how does he do it?  how do you create a triangle like that, and how do you
> create a reflection like that? anybody know how i can contact the dude?
>
>

Post a reply to this message

in povray.newusers, DreyWerx says...
> check this out: http://www.geocities.com/Area51/3450/gallery/index.html
> how does he do it?  how do you create a triangle like that, and how do you
> create a reflection like that? anybody know how i can contact the dude?

Wouln't it be possible to make a drawing of this 'impossible triangle' 
and map the image on a flat object of the correct shape and size that 
throws the _seemingly_ correct shadows? You can't see it's 3D structure!!
-- 
Regards,  Sander

Post a reply to this message

In article <MPG.1494d78d915e0b349896b6@news.povray.org>, Sander 
<san### [at] stolscom> wrote:

> Wouln't it be possible to make a drawing of this 'impossible triangle' 
> and map the image on a flat object of the correct shape and size that 
> throws the _seemingly_ correct shadows? You can't see it's 3D structure!!

Make a *real* triangular shape and use image_map to simulate the 
lighting and shading? That might work...the shadow wouldn't be exactly 
correct, but close enough that most people wouldn't notice the 
difference.
Or easier, use MegaPOV and no_shadow for the visible "broken" triangle 
and no_image for another triangle to cast correct-looking shadows.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

<><

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DreyWerx wrote:

> check this out: http://www.geocities.com/Area51/3450/gallery/index.html
> how does he do it?  how do you create a triangle like that,

Memories... Here's a script I wrote for Pov 1.0 in 1993, now adapted for 3.1g
:
#include "colors.inc"
#include "textures.inc"
camera{translate <-12, -11.2, -11.5>    direction z*4   up y   right 4*x/3
look_at <4.7, 3.2, 2.5> }
background{SkyBlue}
light_source {<-1, 1, -1>*1000  color White*2}
box{-1,1 scale <2.5, 0.3, 0.3> translate <2.5, 0.3, 0.3> texture {DMFWood4}}
box{-1,1 scale <0.3, 2.5, 0.3> translate <4.7, 2.5,-0.3> texture {DMFWood4
rotate z*90}}
box{-1,1 scale <0.3, 0.3, 2.5> translate <4.1, 4.7, 1.9> texture {DMFWood4
rotate y*90}}

G.

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In case you were still wondering, he has an email listed at this address:
mai### [at] spamgourmetcom.


"DreyWerx" <you### [at] hotmailcom> wrote in message
news:3a280440@news.povray.org...
> check this out: http://www.geocities.com/Area51/3450/gallery/index.html
> how does he do it?  how do you create a triangle like that, and how do you
> create a reflection like that? anybody know how i can contact the dude?
>
>

Post a reply to this message