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  1. ACM SIGGRAPH 2006 Teapot Copyright restrictions prevent ACM from providing the full text for the Teapot exhibits (SIGGRAPH '06)
  2. 1630
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Tea set 113/114
Tea set 119/120
Community tea project
1630
The air-teapot
It's tea time!
Contrast
Teapot: the movie teaser
30th Anniversary teapot 1
Coming together/coming apart, teapots and flying saucers, up in smoke, pregnant pause
A terribly scratched teapot
Tempest (inquiry)
SIGGRAPH teapot
Alphabet word gestures: 1243
Wuyi mountains 1
Wuyi mountains 3
Wuyi mountains 8
Wuyi mountains 11
Tea four two
head full of dreams
In this, teapots are like typefaces
teapot
The common world of tea
From digital to analogue or the rebirth of a teapot (process demonstration)
From digital to analogue or the rebirth of a teapot (process demonstration)
Aggregated teapot
Teapot # 1
Teapot # 3
Martin Newell's original teapot
Amazing portrait [al·la prima]; process of drawing teapot (drawing of oils painterly rendering)
“Machined aluminum Utah teapot” by Gershon Elber
“Plastic Utah teapot” by Steve Sady
Animated embroidery: a teapot in modern blackwork
Boston skyline, rendered with teapots
3D Origami teapot
Teapot subdivision
The Utah teapot paperweight 1991
2D origami teapot with diagram
Alphabet word gestures: 1243-231
Alphabet word gestures: all
evolution of a creature
Perfectly rendered
Tea 43

1630

Content Provider ACM Digital Library
Author Godin, Guy
Abstract In 1630, on the year of foundation of Boston, Jean-Louis Sieur de Vaulezard published his treatise "Perspective cilindrique et conique, ou Traicté des apparences veuës par le moyen des miroirs cilindriques et coniques, soient convexes ou concaves" (Cylindrical and conical perspective, or Treatise on appearances seen using cylindrical and conical mirrors, either convex or concave). It proposed the first known exact geometric method for the construction of catoptric anamorphosis images. Cylindrical images, which are only seen correctly through a cylindrical mirror, had been popular in Europe for more than a decade, and were also known in China: it has been conjectured by Baltruöaitis that they were introduced to Europe from China, just as tea had been centuries earlier.Vaulezard showed how a rectangular grid projects onto the image surface using geometric optics (we would now call it ray-tracing). The reverse problem, known as Alhazenís problem (after the Arab scholar ibn Al-Haytham), had a known but more complex solution. Before Vaulezard, catoptric anamorphosis were probably realized using polar-grid approximations, or by painting while looking through the mirror. Since approximate solutions such as the one popularized later by Nicéron proved adequate for many contents, they eventually gained favor because of their simplicity.Contemporary lectures of catoptric anamorphosis often depict it as a juncture point between art and science, or mathematics, a position shared by computer graphics. Even in a media-rich era, this geometric optical transformation continues to fascinate. The iconic Utah teapot appeared in the 1976 Newell/Blinn paper describing reflection mechanism and texture mapping: Figure 5 of the paper showed the cylindrical anamorphosis of a photograph as an illustration of the technique.The piece 1630 shows a cylindrical catoptric anamorphic image, combining a diagram from Vaulezard's work with the Utah teapot: the straight lines of light propagation in the diagram warp into curves; the anamorphic images of the diagram resembles that of the teapot in its minimalist wireframe representation. While the cylindrical mirror reveals the original image, the anisotropic scaling of the diagram's pixels induced by the mapping emphasizes the discrete nature of the image.
ISBN 1595933646
DOI 10.1145/1180098.1180103
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2006-07-30
Publisher Place New York
Access Restriction Subscribed
Content Type Text
Resource Type Article
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