<html><body><div style="color:#000; background-color:#fff; font-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif;font-size:14pt"><div>Dear folks,</div><div><br></div><div style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;">I just want to let you know the following. It may be a bug.</div><div style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;">Activating showpoints produces a compile error in PostScript phase.</div><div style="color: rgb(0, 0, 0);
font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;">\documentclass[pstricks,border=12pt]{standalone}</div><div>\usepackage{pstricks-add}</div><div>\psset{showpoints}% <--- source of error!</div><div>\begin{document}</div><div>\begin{pspicture}[showgrid](-5,-5)(5,5) </div><div> \psset{linecolor=blue}</div><div> \psline(1,0) </div><div> \pstVerb{/Angle 0 def}</div><div> \psStartPoint(1,0)% <--- why is it needed? </div><div> \multido{\i=1+1}{15}</div><div> {% <--- why is it needed?</div><div><span class="Apple-tab-span" style="white-space:pre">
</span>\pstVerb{Angle 1 \i\space 1 sub sqrt atan add /Angle exch def }</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>\psVector[arrows=-](! 1 Angle PtoC)</div><div> \psline(! cp.X cp.Y)</div><div> }</div><div>\end{pspicture}</div><div>\end{document}</div><div><br></div><div style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;">Thank you.</div><div style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;">Code
Mocker</div><div style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;"><br></div><div style="color: rgb(0, 0, 0); font-size: 19px; font-family: HelveticaNeue, 'Helvetica Neue', Helvetica, Arial, 'Lucida Grande', sans-serif; background-color: transparent; font-style: normal;">(http://tex.stackexchange.com/users/19356)</div></div></body></html>