<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">In an exchange between Minsu Kim and Ulrike Fischer <div><br></div><div>(see </div><div><a href="http://newsgroups.derkeiler.com/Archive/Comp/comp.text.tex/2009-07/msg00425.html">http://newsgroups.derkeiler.com/Archive/Comp/comp.text.tex/2009-07/msg00425.html</a></div><div>)<br><div><br class="webkit-block-placeholder"></div><div>the focus is on how to create *text* in the shape of a spiral. (See source below.) They use the digits of Pi for text in a successful example.</div><div><br></div><div>I tried to insert a mathematical formula bookended by $s (say $a^2 + b^2 =c^2$) but the source does not deliver and stops with an (odd) error message.</div><div><br></div><div>Is there a remedy? Is there a way to get mathematical formulas in the shape of a spiral?</div><div><br></div><div>Iraj.</div><div><br class="webkit-block-placeholder"></div><div><br class="webkit-block-placeholder"></div><div>=========================</div><div><br class="webkit-block-placeholder"></div><div><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\documentclass{article}</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\usepackage{pst-plot}</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\usepackage{pst-text}</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\usepackage{pstricks-add}</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\begin{document}</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\makeatletter</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\hspace*{4cm}</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\begin{pspicture}(2,2)(2,2)</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">% A \DoPerCharacter macro adapted from Juergen Schlegelmilch</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">% (posted on comp.text.tex - January 1998)</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\def\DoPerCharacter#1#2#3\@nil{%</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">#1#2%</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\edef\@tempa{#3}%</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\ifx\@tempa\empty</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\else</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\DoPerCharacter#1#3\@nil</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\fi}</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\def\PerCharacter#1#2{\DoPerCharacter#1#2\@nil}</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\pst@dimh=0.7pt</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\def\CharacterAction#1{%</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\psscalebox{1 \pst@number{\pst@dimh}}{#1}</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\advance\pst@dimh by 0.04pt}</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\pstextpath{\psplot</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">[linestyle=none,polarplot=true,plotpoints=300,unit=5]</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">{500}{-500}{1 2.7182818 x 200 div exp 1 add div}}% Spiral</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">{\PerCharacter{\CharacterAction}{%</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">3,141592653589793238462643383279502884197169399375%</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">10582097494459230781640}}</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\end{pspicture}</span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; "><br></span><span class="Apple-style-span" style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 11px; ">\end{document}</span></div><div><br class="webkit-block-placeholder"></div><div><br class="webkit-block-placeholder"></div><div>
<span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: 'Comic Sans MS'; font-size: 16px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0; "><span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: 'Comic Sans MS'; font-size: 16px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; -webkit-text-decorations-in-effect: none; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; "><div style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; "><div><br class="Apple-interchange-newline"><br></div><div><br></div><div><br></div><div><br></div><div><br></div><div>••••••••••••••••</div></div></span></span>
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