File:Triple-Spiral-Symbol-4turns-filled.svg
Original file (SVG file, nominally 639 × 600 pixels, file size: 28 KB)
Captions
Summary
[edit]DescriptionTriple-Spiral-Symbol-4turns-filled.svg | Most elaborate version of Triple Spiral symbol constructed from mathematical Archimedean spirals (see Image:Triple-Spiral-Symbol.svg). This version consists of filled spirals with four turns. See also Image:Triskele-Symbol-spiral.svg (with two turns) and Image:Triple-Spiral-Symbol-filled.svg (with three). Image:Triple-Spiral-4turns_green_transparent.png is another variant. For a basic triple-spiral, see Image:Triple-Spiral-Symbol.svg, and for "wheeled" forms of the spiral triskelion/triple spiral symbol, see Image:Wheeled-Triskelion-basic.svg , Image:Roissy triskelion iron ring signet.png , Image:Triple-spiral-wheeled-simple.svg , or Image:Triskelion-spiral-threespoked-inspiral.svg . For a spiral triskelion with a hollow triangle in the center, see Image:Triskele-hollow-triangle.svg . For versions of a triple-spiral labyrinth, see Image:Triple-Spiral-labyrinth.svg and Image:Triple-Spiral-labyrinth-variant.svg . |
Date | (PostScript source and PNG), 2006 (SVG) |
Source |
SVG version of Image:Triple-Spiral-Symbol-4turns-filled.png .
%! /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 = insert a curve point every these degrees /sweeps swp2 def % number of 360 degree turnings to show % double - 0 to display single spiral, else double %%% Procedures: /pi 3.1415926535898 def/radians 57.295779513082 def /sepwid sepwid pi div 2 div def gsave centerx centery translate rotf rotate /aspiral{/prevbezy 0 def/first 1 def lower incrm sweeps 360 mul{7{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 /slope sinth thcosth add costh thsinth sub div def sinth 0 gt sinth 0 eq costh -1 eq and or{/flag -1 def}{/flag 1 def}ifelse /A exch def 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 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/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: /sweeps 3.67 def %%% double 0 ne{/phase 180 def aspiral}if grestore %%%%%%%%%%%%%%%% }def gsave 573.5 100 translate -.36 dup neg scale -1 rotate /lower 0 def/double 1 def/swp2 4 def/incrm 15 def /centerx 304 def/centery 550 def/rotf 0 def archimdouble /centerx 1147.334 def/centery 550 def/rotf 120 def archimdouble /centerx 725.667 def/centery 1280.3486 def/rotf 240 def archimdouble /lower 1460.31 def/double 0 def/swp2 1480 360 div def/incrm 9.83 def /centerx 304 def/centery 550 def/rotf 0 def archimdouble /centerx 1147.334 def/centery 550 def/rotf 120 def archimdouble /centerx 725.667 def/centery 1280.3486 def/rotf 240 def archimdouble grestore showpage %EOF |
Author | AnonMoos |
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. |
File history
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 10:51, 2 January 2015 | 639 × 600 (28 KB) | AnonMoos (talk | contribs) | slightly adjusting margins | |
16:32, 10 October 2011 | 642 × 600 (28 KB) | AnonMoos (talk | contribs) | opaque only near symbol | ||
12:27, 18 December 2006 | 642 × 600 (27 KB) | AnonMoos (talk | contribs) | adding white background | ||
06:52, 7 July 2006 | 642 × 600 (27 KB) | AnonMoos (talk | contribs) | == Summary == Most elaborate version of Triple Spiral symbol constructed from mathematical Archimedean spirals (see Image:Triple-Spiral-Symbol.svg). This version consists of filled spirals with four turns. See also [[:Image:Triskele-Symbol-spiral.s |
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Short title | Triple Spiral symbol -- three filled Archimedean spirals, four turns |
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Width | 639 |
Height | 600 |