Sierpinski triangle/Graphical: Difference between revisions
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DrawSierpinskiTriangle(5) |
DrawSierpinskiTriangle(5) |
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</lang> |
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=={{header|Racket}}== |
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[[File : RacketSierpinski.png|thumb|right]] |
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<lang Racket> |
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#lang racket |
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(require 2htdp/image) |
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(define (sierpinski n) |
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(if (zero? n) |
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(triangle 2 'solid 'red) |
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(let ([t (sierpinski (- n 1))]) |
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(freeze (above t (beside t t)))))) |
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;; the following will show the graphics if run in DrRacket |
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(sierpinski 8) |
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;; or use this to dump the image into a file, shown on the right |
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(require file/convertible) |
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(display-to-file (convert (sierpinski 8) 'png-bytes) "sierpinski.png") |
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</lang> |
</lang> |
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