File:Overhand-loop.png: Difference between revisions

Simple overhand knot of practical knot-tying; if the two loose ends are joined, it becomes a trefoil knot (3_1).

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

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sqrt def 1 setlinecap Q -2 mul 25 sub -50 Q sub moveto
Q neg -75 50 150 30 arcn Q -25 50 210 330 arc
0 0 100 -30 210 arc Q neg -25 50 210 330 arc
Q -75 50 150 30 arcn 25 Q neg rlineto gsave 33 setlinewidth
0 setgray stroke grestore stroke 33 setlinewidth 0 setgray
0 setlinecap
Q neg -75 50 128 150 arc -9 dup 3 sqrt mul rlineto stroke
Q -25 50 311 330 arc 0 0 100 -30 -18 arc stroke
Q neg -25 50 314 330 arc Q -75 50 150 134 arcn stroke
18 setlinewidth .8 .9 1 setrgbcolor
Q neg -75 50 127 150 arc -9.5 dup 3 sqrt mul rlineto stroke
Q -25 50 310 330 arc 0 0 100 -30 -17 arc stroke
Q neg -25 50 313 330 arc Q -75 50 150 133 arcn stroke showpage
%EOF