File:Op-art-4-sided-spiral-tunnel.svg

Description An "Op art" looking spiraling four-sided tunnel generated by an extremely simple iterative mathematical transformation: Draw a square, then inside that square draw a smaller centered square in negative color rotated by 5°, and with sides 92.30623% the length of the sides of the enclosing square.
Date
Source

Self-made SVG file, corresponding to the following vector PostScript source code:

%!
306 396 translate .3 dup scale/col 0 def 42{-1000 -1000 moveto 2000 0 rlineto
0 2000 rlineto -2000 0 rlineto closepath fill 5 rotate 0.9230623 dup scale/col
1 col sub def col setgray}repeat showpage
%EOF
Author AnonMoos
Permission
(Reusing this file)
Public domain I, the copyright holder of this work, release this work into the public domain. This applies worldwide.
In some countries this may not be legally possible; if so:
I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
Category:Self-published work#Op-art-4-sided-spiral-tunnel.svgCategory:PD-self#Op-art-4-sided-spiral-tunnel.svg
Category:Geometry and art Category:Logarithmic spirals Category:Self-similarity Category:Images with PostScript source code Category:4-fold rotational symmetry
Category:4-fold rotational symmetry Category:Geometry and art Category:Images with PostScript source code Category:Logarithmic spirals Category:PD-self Category:Self-published work Category:Self-similarity