File:Impossible trefoil knot Isometric.png: Difference between revisions

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(Trefoil (three-crossing) knot of mathematical knot theory, depicted as an impossible object, shown in isometric projection pseudo-perspective. Self-made, declared to be in public domain, generated from the following PostScript source code: <pre>%! 300 33)
 
(simpler source)
 
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dup/xc exch def exch .5 add 144 mul xc -72 mul add exch .5 add
dup/xc exch def exch .5 add 144 mul xc -72 mul add exch .5 add
15552 sqrt mul exch}def/l{X lineto}def 0 3 X moveto 0 1 l 3 1 l 3
15552 sqrt mul exch}def/l{X lineto}def 0 3 X moveto 0 1 l 3 1 l 3
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2 l 1 2 l 1 0 l 2 0 l 2 3 l closepath 0 setgray 72 setlinewidth 1
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setlinejoin stroke 9 setlinewidth 1 0 X moveto .75 -.25 l 2 -.25
1.75 .25 l 1.75 1.75 l gsave 0 1 0 setrgbcolor fill grestore
l 2.25 0 l closepath gsave 1 1 0 setrgbcolor fill grestore stroke
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moveto 2.25 1.6 l 2 1.6 l 2 0.4 l gsave 0 .25 1 setrgbcolor fill
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closepath gsave 1 1 0 setrgbcolor fill grestore stroke 0 1 X
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%EOF</pre>
%EOF</pre>

Latest revision as of 17:52, 7 June 2011

Trefoil (three-crossing) knot of mathematical knot theory, depicted as an impossible object, shown in isometric projection pseudo-perspective.

Self-made, declared to be in public domain, generated from the following PostScript source code:

%!
300 335 translate .6 dup scale 180 rotate 9 setlinewidth/X{exch
dup/xc exch def exch .5 add 144 mul xc -72 mul add exch .5 add
15552 sqrt mul exch}def/l{X lineto}def 0 3 X moveto 0 1 l 3 1 l 3
2 l 1 2 l 1 0 l 2 0 l 2 3 l closepath 0 setgray 72 setlinewidth 1
setlinejoin stroke 9 setlinewidth 1 0 X moveto .75 -.25 l 2 -.25
l 2.25 0 l closepath gsave 1 1 0 setrgbcolor fill grestore stroke
0 1 X moveto -.25 .75 l 3 .75 l 3.25 1 l closepath gsave 1 1 0
setrgbcolor fill grestore stroke 1.25 2 X moveto 1.25 1.75 l 2.75
1.75 l 3 2 l closepath gsave 1 1 0 setrgbcolor fill grestore
stroke .25 3 X moveto .25 2.75 l 1.75 2.75 l 2 3 l closepath
gsave 1 1 0 setrgbcolor fill grestore stroke 0 3.25 X moveto 0 1
l -.25 .75 l -.25 3 l closepath gsave 0 .94 0 setrgbcolor fill
grestore stroke 2 .75 X moveto 2 .25 l 1.75 .25 l 1.75 .75 l
closepath gsave 0 .94 0 setrgbcolor fill grestore stroke 1 2.25 X
moveto 1 0 l .75 -.25 l .75 2 l closepath gsave 0 .94 0
setrgbcolor fill grestore stroke 2 1.25 X moveto 2 3 l 1.75 2.75
l 1.75 1.25 l closepath gsave 0 .94 0 setrgbcolor fill grestore
stroke 3 2 X moveto 3 1.25 l 2.75 1.25 l 2.75 1.75 l closepath
gsave 0 .94 0 setrgbcolor fill grestore stroke 2.25 1.25 X moveto
2.25 3.25 l 0 3.25 l 0 1 l .75 1 l .75 1.25 l .25 1.25 l .25 3 l
2 3 l 2 1.25 l closepath gsave 0 .25 1 setrgbcolor fill grestore
stroke 2.25 2.25 X moveto 3.25 2.25 l 3.25 1 l 1.25 1 l 1.25 1.25
l 3 1.25 l 3 2 l 2.25 2 l closepath gsave 0 .25 1 setrgbcolor
fill grestore stroke 2 0.75 X moveto 2 .25 l 1.25 .25 l 1.25 2 l
1.75 2 l 1.75 2.25 l 1 2.25 l 1 0 l 2.25 0 l 2.25 0.75 l
closepath gsave 0 .25 1 setrgbcolor fill grestore stroke showpage
%EOF

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Date/TimeThumbnailDimensionsUserComment
current22:39, 2 June 2011Thumbnail for version as of 22:39, 2 June 2011432 × 600 (7 KB)AnonMoos (talk | contribs)Trefoil (three-crossing) knot of mathematical knot theory, depicted as an impossible object, shown in isometric projection pseudo-perspective. Self-made, declared to be in public domain, generated from the following PostScript source code: <pre>%! 300 33

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