On Monday, January 27, 2025 at 07:09:21 AM EST, John David via Discuss <discuss@lists.openscad.org> wrote: >As mentioned elsewhere, I like Gerald Farin's books on CAGD and his NURBS books.   >Dianne Hansford also has several books on the subjects.  Even though these books  >are typically more advanced than something focusing on Bézier curves only, they make  >sure to address many of the more esoteric properties, as well as the basics. Thanks again for mentioning those --- I have them on my "Want to Read" list in Goodreads, and was able to find at least one on thriftbooks.com --- next up is finding the time to read through everything and then see how it applies in my project. William

On Sunday, January 26, 2025 at 10:56:45 PM EST, Adrian Mariano via Discuss <discuss@lists.openscad.org> wrote: >Well, you don't say what you want to do with conic sections.   I'm trying to model a specific toolpath and the 3D result. >I've never heard of anybody making much of of them in CAD modeling other than for simple things like roundings.   This use-case is a lot more complex. >It could be because the computations get annoying.  Beziers have simple computations.  That sounds right --- when I had a commercial tool calculate the toolpaths for a test 2" x 1" x 1" design it took about 20 minutes and resulted in a ~127MB file. William

Also take a look at abebooks.com. I can see several of the books on sale used for $10 to $20 a pop. Yea, the books, particularly Farin's book on curves and surfaces, is a tough read. If you get deep into this, see if you can find an extra tutorial on "blossoms" which is a mathematical notation he started using which simplifies the algorithms by abstracting into arbitrary dimensionality. On Mon, Jan 27, 2025 at 11:04 AM William F. Adams via Discuss < discuss@lists.openscad.org> wrote: > On Monday, January 27, 2025 at 07:09:21 AM EST, John David via Discuss < > discuss@lists.openscad.org> wrote: > > >As mentioned elsewhere, I like Gerald Farin's books on CAGD and his NURBS > books. > >Dianne Hansford also has several books on the subjects. Even though > these books > >are typically more advanced than something focusing on Bézier curves > only, they make > >sure to address many of the more esoteric properties, as well as the > basics. > > Thanks again for mentioning those --- I have them on my "Want to Read" > list in Goodreads, and was able to find at least one on thriftbooks.com > --- next up is finding the time to read through everything and then see how > it applies in my project. > > William > _______________________________________________ > OpenSCAD mailing list > To unsubscribe send an email to discuss-leave@lists.openscad.org >