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<p class="MsoNormal">Dear list,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="EN-US">I am playing with pst-solide3D by making the examples of Herbert’s book.<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">In particular, example 23-06-14 and I wanted to see the effect of viewpoint.<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 correctly understand the spherical coordinates (r,\theta,\phi): r is the length of the vector OV, \theta is the angle between xz plane and the plane comprising vector OV and perpendicular to the xy plane and \phi
is the angle between vector OV and z axis.<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">So viewpoint=50 45 90 rtp2xyz is viewing the cube from the z axis and 45 degree away from the x axis. But the code below does not display what I expect: it seems that \theta is set to zero instead of 45 degree
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">If I put viewport=50 45 89.9 rtp2xyz, I get what I expect.<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">Look at the code below to see my trouble.<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">Bets regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US">Patrice<o:p></o:p></span></p>
<p class="MsoNormal"><u><span lang="EN-US" style="font-size:22.0pt;font-family:"Helvetica",sans-serif;color:gray;mso-fareast-language:FR"><o:p><span style="text-decoration:none"> </span></o:p></span></u></p>
<pre><span lang="EN-US" style="color:#606060">%% </span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#606060">%% A DANTE-Edition example</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#606060">%% </span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#606060">%% Example 23-06-14 on page 396.</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#606060">%% </span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#606060">%% Copyright (C) 2011 Herbert Voss</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#606060">%% </span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#606060">%% It may be distributed and/or modified under the conditions</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#606060">%% of the LaTeX Project Public License, either version 1.3</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#606060">%% of this license or (at your option) any later version.</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#606060">%% </span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#606060">%% See http://www.latex-project.org/lppl.txt for details.</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#606060">%% </span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#606060">%% </span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#606060">%% ==== </span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#606060">% Show page(s) 1</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#606060">%% </span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:maroon">\documentclass</span><span lang="EN-US" style="color:black">[]{article}</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:maroon">\pagestyle</span><span lang="EN-US" style="color:black">{empty}</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:maroon">\setlength\textwidth</span><span lang="EN-US" style="color:black">{105.<u>70511pt</u>}</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:maroon">\setlength\parindent</span><span lang="EN-US" style="color:black">{<u>0pt</u>}</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:maroon">\usepackage</span><span lang="EN-US" style="color:black">{pst-<u>solides3d</u>}</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-paragraph-type:empty;-qt-block-indent:0"><span lang="EN-US"><o:p> </o:p></span></pre>
<pre style="-qt-paragraph-type:empty;-qt-block-indent:0"><span lang="EN-US"><o:p> </o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#0000CC">\begin</span><span lang="EN-US" style="color:black">{document}</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-paragraph-type:empty;-qt-block-indent:0"><span lang="EN-US"><o:p> </o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:maroon">\psset</span><span lang="EN-US" style="color:black">{<u>viewpoint</u>=50 45 90 <u>rtp2xyz</u>,<u>Decran</u>=50}</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#0000CC">\begin</span><span lang="EN-US" style="color:black">{pspicture}</span><span lang="EN-US" style="color:#9A4D00">(-</span><span lang="EN-US" style="color:#660066">2</span><span lang="EN-US" style="color:#9A4D00">,-</span><span lang="EN-US" style="color:#660066">2</span><span lang="EN-US" style="color:#9A4D00">)(</span><span lang="EN-US" style="color:#660066">2</span><span lang="EN-US" style="color:#9A4D00">,</span><span lang="EN-US" style="color:#660066">2</span><span lang="EN-US" style="color:#9A4D00">)</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#006699">\psSolid</span><span lang="EN-US" style="color:#9A4D00">[object=cube]</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#006699">\axesIIID</span><span lang="EN-US" style="color:#9A4D00">[showOrigin=false](</span><span lang="EN-US" style="color:#660066">2</span><span lang="EN-US" style="color:#9A4D00">,</span><span lang="EN-US" style="color:#660066">2</span><span lang="EN-US" style="color:#9A4D00">,</span><span lang="EN-US" style="color:#660066">2</span><span lang="EN-US" style="color:#9A4D00">)(</span><span lang="EN-US" style="color:#660066">4</span><span lang="EN-US" style="color:#9A4D00">,</span><span lang="EN-US" style="color:#660066">4</span><span lang="EN-US" style="color:#9A4D00">,</span><span lang="EN-US" style="color:#660066">4</span><span lang="EN-US" style="color:#9A4D00">)</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#0000CC">\end</span><span lang="EN-US" style="color:black">{pspicture}</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-paragraph-type:empty;-qt-block-indent:0"><span lang="EN-US"><o:p> </o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:maroon">\vspace</span><span lang="EN-US" style="color:black">{<u>5cm</u>}</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-paragraph-type:empty;-qt-block-indent:0"><span lang="EN-US"><o:p> </o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:maroon">\psset</span><span lang="EN-US" style="color:black">{<u>viewpoint</u>=50 45 89.9 <u>rtp2xyz</u>,<u>Decran</u>=50}</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#0000CC">\begin</span><span lang="EN-US" style="color:black">{pspicture}</span><span lang="EN-US" style="color:#9A4D00">(-</span><span lang="EN-US" style="color:#660066">2</span><span lang="EN-US" style="color:#9A4D00">,-</span><span lang="EN-US" style="color:#660066">2</span><span lang="EN-US" style="color:#9A4D00">)(</span><span lang="EN-US" style="color:#660066">2</span><span lang="EN-US" style="color:#9A4D00">,</span><span lang="EN-US" style="color:#660066">2</span><span lang="EN-US" style="color:#9A4D00">)</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#006699">\psSolid</span><span lang="EN-US" style="color:#9A4D00">[object=cube]</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#006699">\axesIIID</span><span lang="EN-US" style="color:#9A4D00">[showOrigin=false](</span><span lang="EN-US" style="color:#660066">2</span><span lang="EN-US" style="color:#9A4D00">,</span><span lang="EN-US" style="color:#660066">2</span><span lang="EN-US" style="color:#9A4D00">,</span><span lang="EN-US" style="color:#660066">2</span><span lang="EN-US" style="color:#9A4D00">)(</span><span lang="EN-US" style="color:#660066">4</span><span lang="EN-US" style="color:#9A4D00">,</span><span lang="EN-US" style="color:#660066">4</span><span lang="EN-US" style="color:#9A4D00">,</span><span lang="EN-US" style="color:#660066">4</span><span lang="EN-US" style="color:#9A4D00">)</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-block-indent:0"><span lang="EN-US" style="color:#0000CC">\end</span><span lang="EN-US" style="color:black">{pspicture}</span><span lang="EN-US"><o:p></o:p></span></pre>
<pre style="-qt-paragraph-type:empty;-qt-block-indent:0"><span lang="EN-US"><o:p> </o:p></span></pre>
<pre style="-qt-block-indent:0"><span style="color:#0000CC">\end</span><span style="color:black">{document}</span><o:p></o:p></pre>
<p class="MsoNormal"><o:p> </o:p></p>
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