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  • I'm at the Computer History Museum in Mountain View, California,

  • and amongst all the thousands of artifacts here is this:

  • a regular, everyday teapot.

  • The world's most famous teapot.

  • It's called the Utah Teapot, and you've almost certainly seen it before,

  • even if you don't realise it.

  • Or at least, a digital version of it.

  • In the old Windows Pipes screensaver,

  • occasionally instead of a ball joint,

  • a teapot would appear.

  • This teapot.

  • It's in the background of that 3D-animated Simpsons episode from the 90s,

  • and it's in a couple of Pixar films.

  • It's an in-joke amongst animators,

  • and that's because it was the first realistic, complex object

  • to be widely used in computer graphics.

  • In 1974, a researcher at the University of Utah called Martin Newell

  • needed a reference object, something simple to test the algorithms he was designing.

  • The story goes that he told his wife this as they were sitting down for tea --

  • Newell was born in Britain, so tea --

  • and she suggested that modelling the teapot.

  • And it was ideal.

  • It has concave and convex surfaces.

  • It can cast shadows on itself,

  • which is a problem that some algorithms might find difficult to solve.

  • It's immediately recognisable:

  • you can tell by eye if the teapot looks like a teapot,

  • or if something's gone wrong with your rendering.

  • And you don't have to texture it to make it look good.

  • As long as it has a plain, light colour, and it...

  • well, it... it looks like a teapot.

  • But it's also not too complicated: back in the seventies,

  • computer graphics involved a lot of working by hand.

  • Newell sketched the teapot on graph paper,

  • and then typed in the resulting coordinates by hand.

  • And here's what I really like about the teapot:

  • over the forty-something years that the digital version of it has existed,

  • details about it have been lost to history.

  • It's said that it was used so much for early graphics experiments

  • that some people could remember all of its data in their head

  • and just type it in when they needed it.

  • Can I find a reliable source for that?

  • Absolutely not,

  • but it's a great story.

  • And at some point, the teapot got squished a bit:

  • some people claim that it's because of old displays with non-square pixels,

  • and some claim it's just because it looked better that way.

  • This is a artifact of the digital era that's got urban legends around it.

  • And whether they're true or not,

  • there's now a canonical version of the teapot:

  • a digital object that's been copied and copied and copied into all sorts of modern culture.

  • Literally billions of people have seen -- well, not this teapot --

  • but a version of it that can be described in one page of numbers.

  • Thanks very much to the Computer History Museum in Mountain View, California!

  • Pull down the description for links to them and the amazing exhibits they've got here.

I'm at the Computer History Museum in Mountain View, California,

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世界上最著名的茶壺。猶他茶壺 (The World's Most Famous Teapot: The Utah Teapot)

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    林宜悉 發佈於 2021 年 01 月 14 日
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