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I am trying to create a shaded picture of the part of the surface z=x^2+y^2 in a portion of the first octant.
<div>I have a few different questions:</div>
<div><b>1. Main Question:</b></div>
<div>While I like pst-solides3d, I am trying to do this within pstThreeD, in part because I don't see how to incorporate all the parameters needed for a SolidObject. </div>
<div>On p. 388 of Herbert Voss's "Graphics and Postscript for TeX and LaTeX" there is a picture that looks qualitatively like what I would want. In order to try to understand how this works, I have tried to copy (with obvious minor changes) the code he gives
for that picture. Here is what I wrote:</div>
<div>
<blockquote type="cite">
<div><br>
</div>
<div>\def\funct{x dup mul y dup mul add}</div>
<div><br>
</div>
<div>\begin{pspicture}(-2,3)(5,6)</div>
<div><span class="Apple-tab-span" style="white-space:pre"></span>\psset{Beta=20, Alpha=20, subticks=7}</div>
<div><span class="Apple-tab-span" style="white-space:pre"></span>\psset{unit=3}</div>
<div><span class="Apple-tab-span" style="white-space:pre"></span>\pstThreeDCoor[xMin=0, yMin=0, zMin=0, xMax=1, yMax=1, zMax=1, linewidth=1pt, linecolor=black]</div>
<div>\pstThreeDPlaneGrid(0,0)(1,1)</div>
<div>\pstThreeDPlaneGrid[planeGrid=xz,planeGridOffset=0](0,0)(1,1)</div>
<div>\pstThreeDPlaneGrid [planeGrid=yz,planeGridOffset=0](0,0)(1,1)</div>
<div><br>
</div>
<div>%{\psset{linewidth=1.5pt}</div>
<div>%<span class="Apple-tab-span" style="white-space:pre"> </span>\pscustom[fillstyle=gradient, plotstyle=curve]{</div>
<div>%<span class="Apple-tab-span" style="white-space:pre"> </span>\psplotThreeD[xPlotpoints=200,yPlotpoints=1, drawStyle=xlines](0,1)(0,0){\funct}</div>
<div>%<span class="Apple-tab-span" style="white-space:pre"> </span>\psplotThreeD[xPlotpoints=1,yPlotpoints=200, drawStyle=ylines](1,1)(0,1){\funct}</div>
<div>%<span class="Apple-tab-span" style="white-space:pre"> </span>\psplotThreeD[xPlotpoints=200,yPlotpoints=1, drawStyle=xlines](1,0)(1,1){\funct}</div>
<div>%<span class="Apple-tab-span" style="white-space:pre"> </span>\psplotThreeD[xPlotpoints=1,yPlotpoints=200, drawStyle=ylines](0,0)(1,0){\funct}</div>
<div>%<span class="Apple-tab-span" style="white-space:pre"> </span>}</div>
<div>%}</div>
<div>\end{pspicture}</div>
</blockquote>
<div><br>
</div>
The significance of the commenting out is this: with all of the commenting out in place (i.e., commented out), I get the expected: the three coordinate planes showing a grid. When they are uncommented (which of course is the whole point) I get the error message</div>
<div>"Bad draw style: \@pstrickserr…immediate help.}\errmessage{#1}\endgroup"</div>
<div>(I've left out liinebreaks)</div>
<div>My preamble calls the following pstricks packages:</div>
<div>
<blockquote type="cite">
<div>\usepackage{pst-plot, pst-math}</div>
<div>\usepackage{pst-solides3d}</div>
<div>\usepackage{pst-3dplot, pst-func}</div>
<div>\usepackage{pst-grad}</div>
<div>\usepackage{pstricks-add}</div>
<div>\usepackage{pst-text}</div>
<div>\usepackage{pst-node}</div>
</blockquote>
</div>
<div>
<div><br>
</div>
</div>
<div>Am I missing something that I should have called? Are the drawStyles xlines and ylines</div>
<div>obsolete? Any idea what is wrong?</div>
<div><br>
</div>
<div>Once I figure this out, my <b>SECOND QUESTION </b>is probably answered somewhere, but I can't find it. I want to put this "3d"</div>
<div>figure inside a larger pspicture. Is there a way for me to set it up, then create the whole thing as an object which I can </div>
<div>place (e.g., \rput) in my larger pspicture? I guess my main concern is how to get the (local) coordinates </div>
<div>(internal to the drawing of the object) protected from the global coordinates of the pspicture.</div>
<div><br>
</div>
<div>Any help would be appreciated.</div>
<div>
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