File:Heraldic gurges (whirlpool) Gorges.svg

Summary[edit]

DescriptionHeraldic gurges (whirlpool) Gorges.svg	English: A heraldic whirlpool or gurges shown on a shield. This is a version of one coat of arms of the Gorges family of England. Sir Maurice Russell (2 February 1356 – 27 June 1416), a High Sheriff of Gloucestershire, was descended from this family.
Date	18 September 2011 (original upload date).
Source	Own work; vector equivalent of the former image GorgesArmsMediaevalShield.jpg.
Author	AnonMoos.
SVG development InfoField	The SVG code is valid.   This vector image was created with PostScript.

Technical details[edit]

The Archimedean spiral was generated from the following vector PostScript source code:

%!
300 396 translate -.42 .42 scale/pi 3.1415926535898 def/R 180 pi
div def/W 15 def/U 7.01 def/D 180 def/C 54 pi div def/L{/Y 0 def
0 W U 360 mul{7{dup}repeat D add cos/H exch def D add sin/G exch
def H mul R div/Q exch def G mul R div/E exch def Q C mul/x exch
def E C mul/y exch def/S G Q add H E sub div def G 0 gt G 0 eq H
-1 eq and or{/F -1 def}{/F 1 def}ifelse/A exch def A 49.294 lt A
180 gt A 196.274 lt and or{/F F neg def}if W sub dup dup dup D
add cos C mul mul R div/M exch def D add sin C mul mul R div/N
exch def W add dup dup dup D add cos C mul mul R div/O exch def D
add sin C mul mul R div/V exch def/P x M sub dup mul y N sub dup
mul add sqrt pi div def/Z x O sub dup mul y V sub dup mul add
sqrt pi div def/B S S mul 1 add sqrt def 0 eq{0 0 moveto/X D cos
Z mul def}{X Y x 1 F mul B div P mul sub y S F mul B div P mul
sub x y curveto /X x 1 F mul B div Z mul add def/Y y S F mul B
div Z mul add def}ifelse}for stroke}def L/U 6.51 def/D 0 def L
showpage
%EOF

Licensing[edit]

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.