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| View Original: | Triple-Triple-Spiral-Trisk-simple.svg (600x600) | |||
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| Keywords: Triple-Triple-Spiral-Trisk-simple.svg A triskelion of three three-fold spirals which is wheeled a simplified version of Image Triple-Triple-Spiral-triskelion svg ; see also File Triple-Triple-Spiral-Trisk-simpler 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 own -- This image is a conversion of the following PostScript code <pre> /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 2 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 other spirals define here double 0 ne /sweeps 1 09 def/phase 180 def aspiral if triple 0 ne /sweeps 1 26 def/phase 120 def aspiral double 0 ne /sweeps 1 17 def/phase 300 def aspiral if /sweeps 1 35 def/phase 240 def aspiral double 0 ne /sweeps 1 def/phase 60 def aspiral if if grestore def -150 -150 translate 875 dup scale/lower 0 def /centerx 395 66666666666666666666666666667 def/centery 550 def/rotf 0 def archimdouble /centerx 652 33333333333333333333333333333 def/centery 550 def/rotf 120 def archimdouble /centerx 524 def/centery 772 27985363800591933602228049328 def/rotf 240 def archimdouble 524 624 0932845460019731120074268311 translate /tripl1 /phase 60 def aspiral/phase 180 def aspiral/phase 300 def aspiral def /tripl2 /phase 0 def aspiral/phase 120 def aspiral/phase 240 def aspiral def gsave 1 00534 dup scale/sweeps 2 92 def/lower 930 def tripl2 /sweeps 2 931 def/lower 1050 def/incrm 5 def tripl2 grestore 1 00572 dup scale/sweeps 2 76 def/lower 870 def tripl1 /sweeps 2 764 def/lower 990 def/incrm 5 def tripl1 showpage EOF</pre> 2007 AnonMoos Triple spiral Computer generated mandalas Archimedean spirals Images with PostScript source code | ||||
