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<p class="MsoNormal"><span lang="FR-BE">Dear Herbert,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="FR-BE"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">I have some trouble with hiddenLine in pst-3dplot.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">From your example <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#0000CC;mso-fareast-language:FR">\begin</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:FR">{pspicture}</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">(-</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">2</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,-</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">1.25</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">)(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">3</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">4.25</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#006699;mso-fareast-language:FR">\psset</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">{Alpha=</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">30</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,Beta=</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">30</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">}</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#006699;mso-fareast-language:FR">\pstThreeDCoor</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">[xMin=-</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">3</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,xMax=</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">1</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,yMin=-</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">1</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,yMax=</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">2</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,zMin=-</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">1</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,zMax=</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">4</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">]</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#006699;mso-fareast-language:FR">\pstThreeDBox</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">[hiddenLine=true](-</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">1</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">1</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">2</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">)(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">0</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">0</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">2</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">)(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">2</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">0</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">0</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">)(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">0</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">1</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">0</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#006699;mso-fareast-language:FR">\pstThreeDDot</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">[drawCoor=true](-</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">1</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">1</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">2</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#0000CC;mso-fareast-language:FR">\end</span><span lang="EN-US" style="color:black;mso-fareast-language:FR">{pspicture}</span><span lang="EN-US"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">when hiddenLine is true the backsides are not drawn.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">If I use my example below, with hiddenLine true I got (1) dashed lines for the backsides, and (2) these lines are not correctly place.<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#0000CC;mso-fareast-language:FR">\begin</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:FR">{pspicture}</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">[showgrid=false](-</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">3</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,-</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">4</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">)(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">7</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">4.5</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#006699;mso-fareast-language:FR">\psset</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">{unit=</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">1</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,Alpha=</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">75</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,Beta=</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">30</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,nameX=</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:green;mso-fareast-language:FR">$1$</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,nameY=</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:green;mso-fareast-language:FR">$2$</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,nameZ=</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:green;mso-fareast-language:FR">$3$</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">}</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#006699;mso-fareast-language:FR">\pstThreeDCoor</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">[linecolor=red,xMax=</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">7</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,yMax=</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">6.5</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,zMax=</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">4.5</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">]</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#006699;mso-fareast-language:FR">\pstThreeDBox</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">[hiddenLine=true](</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">0</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">0</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">0</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">)(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">4</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,-</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">1</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">0</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">)(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">0</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">6</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">0</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">)(</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">0</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">1</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">,</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#660066;mso-fareast-language:FR">3</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#9A4D00;mso-fareast-language:FR">)</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:#0000CC;mso-fareast-language:FR">\end</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";color:black;mso-fareast-language:FR">{pspicture}</span><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:FR"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="font-size:10.0pt;font-family:"Courier New";mso-fareast-language:FR"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best regards,<o:p></o:p></p>
<p class="MsoNormal">Patrice<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:FR"><o:p> </o:p></span></p>
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