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Dear all,</div>
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I am working on a second-semester calculus textbook, and have managed to get some nice volumes of revolution illustrations with non-3d PSTricks with a bit of effort (for my first-semester book), and some nice graphics for series, improper integrals, and the
like. I'm not a power-user by any measure.<br>
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I would like to include a PSTricks-generated illustration for conic sections if possible, showing how a plane intersecting a conic gets you such a curve. Basically, the first illustration in the wikipedia article on conic sections is what I would like to reproduce.</div>
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<a href="https://en.wikipedia.org/wiki/Conic_section" id="LPlnkOWALinkPreview">https://en.wikipedia.org/wiki/Conic_section</a><br>
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<a target="_blank" id="LPImageAnchor284434" href="https://en.wikipedia.org/wiki/Conic_section"><img id="LPThumbnailImageId284434" alt="" style="display: block;" width="160" height="160" src="https://upload.wikimedia.org/wikipedia/commons/thumb/c/cc/TypesOfConicSections.jpg/1200px-TypesOfConicSections.jpg"></a></div>
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<a target="_blank" id="LPUrlAnchor284434" href="https://en.wikipedia.org/wiki/Conic_section" style="text-decoration: none; color: var(--themePrimary);">Conic section - Wikipedia</a></div>
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In mathematics, a conic section (or simply conic) is a curve obtained as the intersection of the surface of a cone with a plane.The three types of conic section are the hyperbola, the parabola, and the ellipse; the circle is a special case of the ellipse, though
historically it was sometimes called a fourth type. The ancient Greek mathematicians studied conic sections, culminating around 200 ...</div>
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en.wikipedia.org</div>
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I can just include that graphic, according to the publisher, but the book is not in color, and finding shades that work to show everything in grayscale seems to be a problem.</div>
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So I'm just wondering if those who have played with such things can point me in the right direction to accomplish this. I have Herbert's 2011 book on PSTricks. (I tried the 3-d packages a long time ago, and am getting back to this problem now, and hope not
to go down too many dead ends if I can avoid them.) Thanks in advance.<br>
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Also, I noticed that my current pdfTeX (Version 3.14159265-2.6-1.40.20 (TeX Live 2019/Debian) on Linux Mint 20.2) has [showorigin=true] being default with \psaxes, and I'm pretty sure that wasn't the case before. I may be misremembering, but I found myself
changing a lot of graphs in my 750-page first-semester calculus book to include [showorigin=false] in those commands, because the two zeros did not fit well with those axes. I apologize if this has been addressed before. (Now when I look at prevoius PDF
files I do see that the origins weren't shown, by default.) Maybe there's a global tweak I can make?<br>
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That said, PSTricks was a godsend when I wanted to make these books, and when I discovered it in the 1990s as a lowly assistant professor of mathematics. My colleagues appreciated seeing it as well, and they found "tricks" within it I was unaware of, as they
learned it.<br>
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Kind regards,<br>
Mike Dougherty<br>
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