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Posted 11 years ago
 If, like me, you missed Tau Day a few months back, you can still celebrate everyone's favourite underdog numerical constant. So let's make a "?-shirt" to counter those all those lame Pi shirts.Here's how to make a Tau shirt in Mathematica.Start by getting some digits of tau:digits = Characters @ ToString[N[2*Pi, 10000]];Now let's draw a really big Tau, and turn it into an array of pixels:tau = Style["?", FontSize -> 128, FontFamily -> "Times"];tau = Binarize @ Rasterize @ tau;Next, all we have to do is walk through the pixels in raster order, creating the next glyph at the location of each successive black pixel:i = 1;glyphs = MapIndexed[  If[#1 == 0, Text[ digits[[i++]], {1,-1.3} * Reverse[#2] ]&,  ImageData[tau], {2}];And render with a cool font:Graphics[Style[glyphs, FontFamily -> "Ubuntu"], ImageSize -> 420]Now to PDF for printing (and thence to https://www.shirts.io/).Export["?.pdf", %]Unfortunately the font isn't preserved, but the fight for tau equality was never going to be easy.
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Posted 11 years ago
 Hi Pete, Welcome to Community! I think you need to take a look at The Tau Manifesto by Michael Hartl. And, btw, in the first video there you can see the grandeur tau-shirt he is wearing. Great post, Tali! I think there should be a tali-constant with a quite complex outline for the symbol, - so that the t-shirt would look like something similar to the below. Now I especially did not post the output, because it is the enigma for you to uncover ;-)ImageCompose[  ImageTake[ImageResize[Import["http://goo.gl/0bCvLX"], 500], {70, 320}, {230, 500}],   ColorNegate[EdgeDetect[Import["http://goo.gl/lnuMog"]]]]For those who puzzled about what is going on you should take a good look at the author of this blog post about Turing machines ;)
Posted 11 years ago
 Nice! You found my very first (and last) Wolfram blog post..Here's a nice extension of the idea, as a challenge: recursive T-shirt. In other words, a T-shirt that features me wearing a T-shirt featuring me wearing a T-shirt, etc... Surely not as hard as this amazing blogpost by John McLoone.P.S. Why doesn't this forum use Ajax to speed things up a bit? Is commercial forum software this backward?
Posted 11 years ago
 tau = 2*Pithis is an "underdog" constant?can u explain?!?