<html><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I hadn't realized that the back-and-forth about clipping concerned my problem, until just now.<div>After fixing a few minor errors in Herbert's example (eg, the first two points in the \psline defining the first clip are identical) I got it working perfectly.</div><div><br></div><div>Thanks!<br><div> <span class="Apple-style-span" style="border-collapse: separate; color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; 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; "><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" style="font: normal normal normal 12px/normal Helvetica; "><br class="Apple-interchange-newline">Zbigniew Nitecki</font></p><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" style="font: normal normal normal 12px/normal Helvetica; ">Department of Mathematics</font></p><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" style="font: normal normal normal 12px/normal Helvetica; ">Tufts University</font></p><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" style="font: normal normal normal 12px/normal Helvetica; ">Medford, MA 02155</font></p><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 12px/normal Helvetica; min-height: 14px; "><br></p><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" style="font: normal normal normal 12px/normal Helvetica; ">telephones:</font></p><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" style="font: normal normal normal 12px/normal Helvetica; ">Office<span class="Apple-converted-space"><span class="Apple-converted-tab"> <span class="Apple-converted-space"> </span></span></span>(617)627-3843</font></p><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" style="font: normal normal normal 12px/normal Helvetica; ">Dept.<span class="Apple-converted-space"><span class="Apple-converted-tab"> <span class="Apple-converted-space"> </span></span></span>(617)627-3234</font></p><p style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; "><font face="Helvetica" size="3" style="font: normal normal normal 12px/normal Helvetica; ">Dept. fax<span class="Apple-converted-space"><span class="Apple-converted-tab"> <span class="Apple-converted-space"> </span></span></span>(617)627-3966</font></p><a href="http://www.tufts.edu/~znitecki/">http://www.tufts.edu/~znitecki/</a></span> </div><br><div><div>On Nov 22, 2008, at 14:59, Herbert Voss wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite"><div>Michael Sharpe schrieb:<br><blockquote type="cite">You can clip in each ThreeD plane to get something that may work. You <br></blockquote><blockquote type="cite">have to be very careful to not introduce glue which can mess up the <br></blockquote><blockquote type="cite">spacing----that's why all the % within the \multido.<br></blockquote><blockquote type="cite"><br></blockquote><blockquote type="cite">\documentclass[dvips]{article}<br></blockquote><blockquote type="cite">\usepackage{pst-3dplot}<br></blockquote><blockquote type="cite">\usepackage{pst-all}<br></blockquote><blockquote type="cite">\usepackage{fp}<br></blockquote><br>there is no need for the fp package<br><br> \documentclass[dvips]{article}<br>\usepackage{pst-3dplot}<br>\usepackage{multido}<br>\begin{document}<br>\psset{unit=1in}<br>\begin{pspicture}(-1.5,-1.5)(1.5,1.5)<br>\pstThreeDCoor[xMin=-2,xMax=2,yMin=-2,yMax=2,zMin=-2,zMax=2]<br>\multido{\nA=-1+.1}{21}{%<br>\begin{psclip}{%<br> \pstThreeDLine[linestyle=none]%<br> (\nA, 1 \nA\space dup mul sub sqrt neg,-1)%<br> (\nA, 1 \nA\space dup mul sub sqrt neg,-1)%<br> (\nA, 1 \nA\space dup mul sub sqrt,1)%<br> (\nA, 1 \nA\space dup mul sub sqrt neg,1)%<br> (\nA, 1 \nA\space dup mul sub sqrt neg,-1)}%<br> \parametricplotThreeD[linecolor=red](-1,1)%<br> {\nA\space t \nA\space dup mul t t mul sub}%<br>\end{psclip}%<br>%slices with y fixed---interchange x, y<br>\begin{psclip}{%<br> \pstThreeDLine[linestyle=none]%<br> (1 \nA\space dup mul sub sqrt neg,\nA,1)%<br> (1 \nA\space dup mul sub sqrt,\nA,-1)%<br> (1 \nA\space dup mul sub sqrt,\nA,1)%<br> (1 \nA\space dup mul sub sqrt neg,\nA,1)%<br> (1 \nA\space dup mul sub sqrt neg,\nA,-1)}<br> \parametricplotThreeD[linecolor=blue](-1,1)%<br> {t \nA\space t t mul \nA\space dup mul sub}%<br>\end{psclip}%<br>}<br>\end{pspicture}<br>\end{document}<br><br>Herbert<br>_______________________________________________<br>PSTricks mailing list<br><a href="mailto:PSTricks@tug.org">PSTricks@tug.org</a><br>http://tug.org/mailman/listinfo/pstricks<br></div></blockquote></div><br></div></body></html>