File:Triple-Triple-Spiral-triskelion.svg
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[edit]DescriptionTriple-Triple-Spiral-triskelion.svg | A triskelion of three three-fold spirals, which is "wheeled" (enclosed within overall spirals); for simpler versions, see Image:Triple-Triple-Spiral-Trisk-simpler.svg and Image:Triple-Triple-Spiral-Trisk-simple.svg . This is an ornate version of the Triple-spiral symbol. For a basic version of the Triple-spiral symbol, and links to further variants, see Image:Triple-Spiral-Symbol.svg . |
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Own work - This image is a conversion of the following PostScript code: %! /archimdouble{ %%%%%%%%%%%%%%%% % PostScript program to display an Archimedean spiral by approximating % it with Bezier curves. Can display a double spiral (two spirals % rotated by 180 degrees with respect to each other). %%% Parameters: % centerx = horizontal coordinate of center of spiral % centery = vertical coordinate of center of spiral % rotf = degrees to rotate /sepwid 110 def % width separating successive turnings of spiral % (half this if double spiral is selected) /incrm 30 def % insert a curve point after this number of degrees /sweeps 1.34 def % number of 360 degree turnings to show /double 1 def % change to 0 to display single spiral /triple 1 def % change to 0 to for non-triple inner spiral %%% Procedures: /pi 3.1415926535898 def/radians 57.295779513082 def /sepwid sepwid pi div 2 div def gsave centerx centery translate rotf rotate /aspiral{/first 1 def lower incrm sweeps 360 mul{8{dup}repeat phase add cos/costh exch def phase add sin/sinth exch def costh mul radians div/thcosth exch def sinth mul radians div/thsinth exch def thcosth sepwid mul/x exch def thsinth sepwid mul/y exch def 0 eq phase 90 eq phase 270 eq or and{/slope 999999999 def}{/slope sinth thcosth add costh thsinth sub div def}ifelse sinth 0 gt sinth 0 eq costh -1 eq and or{/flag -1 def}{/flag 1 def}ifelse /A exch def phase 0 eq phase 180 eq or {A 49.29348 lt A 180 gt A 196.273450852 lt and A 360 gt A 368.8301 lt and A 540 gt A 545.9907 lt and A 720 gt A 724.5217 lt and A 900 gt A 903.6281968 lt and or or or or or{/flag flag neg def}if}if phase 120 eq phase 300 eq or{A 10 lt A 80 gt A 100 lt and or{/flag flag neg def}if}if incrm sub 3{dup}repeat phase add cos sepwid mul mul radians div /prevx exch def phase add sin sepwid mul mul radians div /prevy exch def incrm add 3{dup}repeat phase add cos sepwid mul mul radians div /nextx exch def phase add sin sepwid mul mul radians div /nexty exch def /prevdist x prevx sub dup mul y prevy sub dup mul add sqrt pi div def /nextdist x nextx sub dup mul y nexty sub dup mul add sqrt pi div def /normaliz slope slope mul 1 add sqrt def 0 eq{0 0 moveto/prevbezx phase cos nextdist mul def/prevbezy phase sin nextdist mul def/first 0 def}{first 1 eq{x y moveto/first 0 def}{prevbezx prevbezy x 1 flag mul normaliz div prevdist mul sub y slope flag mul normaliz div prevdist mul sub x y curveto}ifelse /prevbezx x 1 flag mul normaliz div nextdist mul add def /prevbezy y slope flag mul normaliz div nextdist mul add def}ifelse} for stroke}def /phase 0 def aspiral %%% If different sweeps parameter for second spiral, define here: double 0 ne{/sweeps 1.43 def/phase 180 def aspiral}if triple 0 ne{/sweeps 1.6 def/phase 120 def aspiral double 0 ne{/sweeps 1.1 def/phase 300 def aspiral}if /sweeps 1.26 def/phase 240 def aspiral double 0 ne{/sweeps 1.34 def/phase 60 def aspiral}if}if grestore %%%%%%%%%%%%%%%% }def -81 -75 translate .75 dup scale /curvedge{gsave centerx centery translate rotf rotate /lower 582.226 def/phase 60 def/incrm 15.562 def/sweeps 1.67 def aspiral /lower 500.305 def/phase 0 def/incrm 10.105 def/sweeps 1.46 def aspiral grestore/lower 0 def}def/lower 0 def /centerx 377.33333333333333333333333333333 def/centery 550 def/rotf 240 def archimdouble curvedge /centerx 670.66666666666666666666666666667 def/centery 550 def/rotf 0 def archimdouble curvedge /centerx 524 def/centery 804.03411844343533638402546342081 def/rotf 120 def archimdouble curvedge/incrm 30 def 524 634.67803948114511212800848780694 translate /tripl1{/phase 100 def aspiral/phase 220 def aspiral/phase 340 def aspiral}def /tripl2{/phase 40 def aspiral/phase 160 def aspiral/phase 280 def aspiral}def gsave .99463 dup scale/sweeps 3.7 def/lower 1070 def tripl1 grestore gsave .99493 dup scale/sweeps 3.85 def/lower 1130 def tripl2 grestore gsave .99395 dup scale/sweeps 2.9 def/lower 950 def tripl1 /incrm 5.49 def/lower 1040 def/sweeps 2.916 def tripl1 grestore /incrm 30 def gsave .9943 dup scale/sweeps 3.1 def/lower 1010 def tripl2 /incrm 13.267 def/lower 1100 def/sweeps 3.12 def tripl2 grestore showpage %EOF |
Author | AnonMoos |
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Licensing
[edit]Public domainPublic domainfalsefalse |
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. |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:51, 27 July 2011 | 600 × 600 (18 KB) | AnonMoos (talk | contribs) | not opaque in corners | |
20:01, 15 December 2006 | 600 × 600 (18 KB) | AnonMoos (talk | contribs) | A triskelion of three three-fold spirals, which is "wheeled" (enclosed within overall spirals). This is an ornate version of the Triple-spiral symbol. For a basic version of the Triple-spiral symbol, and links to further variants, see [[:Image:Triple-Sp |
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Short title | A "wheeled" triskelion of three three-fold spirals (variant of triple-spiral symbol), enclosed within overall spirals |
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