Yes! I have that book - thanks for reminding me! On Thu, Feb 18, 2021 at 2:09 PM Ian Clark <earthspo...@gmail.com> wrote:
> Cliff Reiter's book! Chapter Six! How could I have forgotten that? > > On Thu, 18 Feb 2021 at 19:00, Raoul Schorer <raoul.scho...@gmail.com> > wrote: > > > Devon, > > > > Check out the book: > > > > Fractals, visualization and J 4th edition 1&2 > > > > You can find it on lulu.com and the pdf version is free, I think! The > book > > uses a lib that can be found in pacman and is full of examples: hexagons, > > game of life and lots of cellular automata. I have it, and it really > cool! > > > > Raoul > > > > Le jeu. 18 févr. 2021 à 18:21, Devon McCormick <devon...@gmail.com> a > > écrit : > > > > > I think someone did a 3D version in APL quite a while ago but I have no > > > idea where it may have gotten to. > > > > > > On Thu, Feb 18, 2021 at 12:19 PM Ian Clark <earthspo...@gmail.com> > > wrote: > > > > > > > @ Devon > > > > A hexagonal grid for game of Life sounds really fascinating! Even > > though > > > > it's been tried (and works fine): > > > > https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life#Variations > > > > Unfortunately the illustration there is a gif, not a svg. Else it > might > > > > have given you a flying start with your hexagonal universe. > > > > > > > > …Having said that, there's a hexagonal grid here: > > > > > > > > > > > > > > https://en.wikipedia.org/wiki/Euclidean_tilings_by_convex_regular_polygons#/media/File:1-uniform_n1.svg > > > > …and it looks like there's a row for each hexagon, and they could in > > > > principle be individually filled (or the rows shuffled using J into 2 > > or > > > > more blocks with a different value of "fill:") > > > > > > > > Keep us informed. 3D next: close-packed spheres. If you can't make it > > > work > > > > pleasingly, how about varying the probability of a stochastic > breeding > > > > rule? > > > > > > > > After Conway's Game of Life, the Ising Model ought to be interesting > in > > > 3D. > > > > > > > > Plus I'm feeling the need for a hexagonal variant of viewmat (it's > just > > > > alternately staggered matrix rows after all)! > > > > > > > > …and I was just wondering what I was going to do this evening! > > > > > > > > Ian > > > > > > > > On Thu, 18 Feb 2021 at 16:28, Ian Clark <earthspo...@gmail.com> > wrote: > > > > > > > > > Yes, I'm sorry. Attachments used not to work – and then I thought I > > saw > > > > > evidence that they did. > > > > > > > > > > I had actually given the link to its wiki page in my first post, > but > > > not > > > > > the full path: > > > > > > > > > > > > > > > https://en.wikipedia.org/wiki/SVG_animation#/media/File:Morphing_SMIL.svg > > > > > > > > > > On Thu, 18 Feb 2021 at 15:24, Hauke Rehr <hauke.r...@uni-jena.de> > > > wrote: > > > > > > > > > >> the attachment didn’t make it through > > > > >> I got used to just adding a .txt extension > > > > >> and it usually works with non-binary stuff > > > > >> (or at least txt-like mime types) > > > > >> I even managed to get pdfs through that way, > > > > >> iirc. > > > > >> > > > > >> Am 18.02.21 um 16:15 schrieb Ian Clark: > > > > >> > Glad to find enthusiasts for SVG – I thought mine was a minority > > > > >> interest. > > > > >> > > > > > >> > And thanks Bill for letting me know there's a dedicated SVG > > widget: > > > > >> svgview. > > > > >> > Long time since I played with isigraph/isidraw. I recall a html > > > widget > > > > >> in > > > > >> > Qt, of limited capability, and didn't expect it to handle SVG > too. > > > But > > > > >> > webview, I see, is what addon 'debug/jig' actually uses to > > display a > > > > >> SVG, > > > > >> > which it builds from the ground up. > > > > >> > > > > > >> > One big advantage of SVG is there's so much sample code, all > > nicely > > > > >> > catalogued. All SVG pics used in Wikipedia are listed here: > > > > >> > https://commons.wikimedia.org/wiki/Category:SVG_by_subject > > > > >> > > > > > >> > Also most laser-cutting services accept SVG as the customer's > > spec. > > > > >> > Inkscape seems to be the tool of choice, because AFAICT SVG is > its > > > > >> native > > > > >> > format. So laser-cutting templates promise to be a good source > of > > > > simple > > > > >> > clip-art for hacking. > > > > >> > > > > > >> > Bob writes > > > > >> >> Inkscape is not bad although the SVG's produced are not always > > > > optimal > > > > >> > (but much quicker to develop than building by hand). > > > > >> > > > > > >> > Inkscape has the worst UX I've ever come across in popular > > freeware, > > > > but > > > > >> > dedicated hacks get used to anything. One big feature that > blinds > > me > > > > to > > > > >> its > > > > >> > failings is its ability to vectorize a (monochrome) photo, as > > bitmap > > > > or > > > > >> > jpeg say, into a SVG of little closed bezier curves – and to > > > > >> progessively > > > > >> > coarsen the picture. Some pretty inventive minimalist cartoons > can > > > be > > > > >> > produced this way, because this gives you self-adjusting pixels > of > > > > >> > arbitrary shape. In the same way it will progressively smooth a > > > > >> hand-drawn > > > > >> > curve, taking curve-fitting to a whole new level. > > > > >> > > > > > >> > I dabbled with this a decade ago, aiming to animate mathematical > > > > models > > > > >> for > > > > >> > educational purposes, and to get pleasing flexible graphics with > > the > > > > >> least > > > > >> > effort. I was led to it from book cover design, in which SVG > has a > > > big > > > > >> part > > > > >> > to play. Here's my fav SVG from Wikipedia showing the > technique's > > > > power > > > > >> > (attached). To view the XML contents, edit the .svg (in jqt). To > > > > display > > > > >> > it, drop it onto your web-browser. > > > > >> > > > > > >> > All this reminds me of the illustrators' saying that if it works > > as > > > a > > > > >> > tattoo, it will work as a Kindle illustration. (Now there's > > another > > > > >> fund of > > > > >> > clip-art for manageable SVGs: tats!) > > > > >> > > > > > >> > HTML5 is another human-readable format with a lot in common with > > SVG > > > > (in > > > > >> > principle). But I fancy there are far fewer code-samples > available > > > > free > > > > >> on > > > > >> > the web, with an unknowable number of websites actually using > it. > > So > > > > it > > > > >> > looks like I'd have to slog through the manual to get anything > > > done: a > > > > >> > ball-and-chain to creative use. > > > > >> > > > > > >> > But if anyone knows better, and can point me to a fund of free > > HTML5 > > > > >> > samples, do let me know. I'd like a reason to spend time on > HTML5. > > > > >> > Rotatable 3D images would be an inducement – but then I'd > > certainly > > > > >> want a > > > > >> > library of 3D images to hack. Planes, spaceships, land vehicles, > > > > >> geography: > > > > >> > forget the witchy fantasy figures. > > > > >> > > > > > >> > Ian Clark > > > > >> > > > > > >> > On Wed, 17 Feb 2021 at 23:28, 'robert therriault' via > Programming > > < > > > > >> > programm...@jsoftware.com> wrote: > > > > >> > > > > > >> >> The Jig debug addon is based on SVG and I think that the > results > > > look > > > > >> >> pretty good, if I do say so myself. Jig is presented in a > webview > > > > >> container > > > > >> >> in jqt. > > > > >> >> > > > > >> >> JHS is very compatible with SVG because it is already browser > > > based. > > > > As > > > > >> >> Ian points out, SVG is compact and readable. > > > > >> >> > > > > >> >> Inkscape is not bad although the SVG's produced are not always > > > > optimal > > > > >> >> (but much quicker to develop than building by hand). > > > > >> >> > > > > >> >> Cheers, bob > > > > >> >> > > > > >> >>> On Feb 17, 2021, at 15:02, Ian Clark <earthspo...@gmail.com> > > > wrote: > > > > >> >>> > > > > >> >>> (IMHO) jgl2 is clunky and hard to debug, as bad as turtle > > > graphics, > > > > >> and > > > > >> >> the > > > > >> >>> results look like "business graphics" from the 1980s. > > > > >> >>> Probably better to use the *plot* addon instead, which is > > > > >> well-integrated > > > > >> >>> with J and has a similar feel to it when you use it at the pd > > > level, > > > > >> but > > > > >> >>> not so clunky and low-level. > > > > >> >>> > > > > >> >>> Don't overlook the humble SVG format (file ext: .svg). It's > > > > supported > > > > >> by > > > > >> >>> all the main browsers, and doesn't need any special add-ons. > The > > > > >> results > > > > >> >>> typically look richer and more professional than jgl2 (for the > > > same > > > > >> time > > > > >> >>> spent). > > > > >> >>> Sadly though, it doesn't seem to be supported by > > > > Qt/isidraw/isigraph. > > > > >> >>> It's an XML file format, which means it's human-readable text > > > which > > > > >> can > > > > >> >> be > > > > >> >>> massaged in J as a byte string using rplc. > > > > >> >>> It's not that hard to read and edit by hand, either, and there > > are > > > > >> plenty > > > > >> >>> of samples on the web to raid. Many of them are surprisingly > > > brief, > > > > >> >>> considering what they do. > > > > >> >>> > > > > >> >>> Suggest you get started with the sample pics in > > > > >> >>> https://en.wikipedia.org/wiki/SVG_animation > > > > >> >>> which lets you build up a recipe book of handy shapes. > > > Alternatively > > > > >> use > > > > >> >>> *Inkscape* (freeware from www.inkscape.org) to generate a > > > prototype > > > > >> >>> picture, and customize it using J to text-process the XML – > > > mostly a > > > > >> >> matter > > > > >> >>> of substituting numerals. You can make respectable animations > in > > > > SVG. > > > > >> >>> > > > > >> >>> Ian > > > > >> >>> > > > > >> >>> On Wed, 17 Feb 2021 at 07:10, Raoul Schorer < > > > > raoul.scho...@gmail.com> > > > > >> >> wrote: > > > > >> >>> > > > > >> >>>> There is also graphics/fvj4 with the companion books, > depending > > > on > > > > >> what > > > > >> >>>> you're doing. > > > > >> >>>> > > > > >> >>>> Le mer. 17 févr. 2021 à 00:30, bill lam <bbill....@gmail.com > > > > a > > > > >> écrit : > > > > >> >>>> > > > > >> >>>>> there is an addon demos/isigraph. > > > > >> >>>>> and IIRC there is also a lab for it. > > > > >> >>>>> > > > > >> >>>>> On Wed, Feb 17, 2021, 6:49 AM Devon McCormick < > > > devon...@gmail.com > > > > > > > > > >> >>>> wrote: > > > > >> >>>>> > > > > >> >>>>>> Thanks! This is exactly what I was looking for. I vaguely > > > > >> remembered > > > > >> >>>>> the > > > > >> >>>>>> isigraph package but could not find documentation on the > > > > Jsoftware > > > > >> >>>> site. > > > > >> >>>>>> > > > > >> >>>>>> On Tue, Feb 16, 2021 at 5:39 PM Michal Wallace < > > > > >> >>>> michal.wall...@gmail.com > > > > >> >>>>>> > > > > >> >>>>>> wrote: > > > > >> >>>>>> > > > > >> >>>>>>> you can use an isidraw / isigraph component to draw > > arbitrary > > > > >> lines, > > > > >> >>>>>>> curves, etc. > > > > >> >>>>>>> Here's an example to get you started: > > > > >> >>>>>>> > > > > >> >>>>>>> > > > > >> >>>>>>> > > > > >> >>>>>> > > > > >> >>>>> > > > > >> >>>> > > > > >> >> > > > > >> > > > > > > > > > > https://code.jsoftware.com/wiki/Guides/Window_Driver/Animation/Animated_JGL2 > > > > >> >>>>>>> > > > > >> >>>>>>> and the drawing commands: > > > > >> >>>>>>> > > > > >> >>>>>>> > > > > >> >>>>>> > > > > >> >>>>> > > > > >> >>>> > > > > >> >> > > > > >> > > > > > > > > > > https://code.jsoftware.com/wiki/Guides/Window_Driver/gl2_Command_Reference > > > > >> >>>>>>> > > > > >> >>>>>>> > > > > >> >>>>>>> On Tue, Feb 16, 2021 at 5:21 PM Devon McCormick < > > > > >> devon...@gmail.com> > > > > >> >>>>>>> wrote: > > > > >> >>>>>>> > > > > >> >>>>>>>> Is there anything in J to allow me to draw arbitrary > > > pictures? > > > > >> I'm > > > > >> >>>>>>> looking > > > > >> >>>>>>>> for something that has commands to draw a line and fill a > > > > defined > > > > >> >>>>> area > > > > >> >>>>>>> with > > > > >> >>>>>>>> a color. I have also considered possibly using Jsh and > > > > >> Javascript > > > > >> >>>> or > > > > >> >>>>>>> HTML5 > > > > >> >>>>>>>> but would prefer something where I could work in J and > have > > > > basic > > > > >> >>>>>> drawing > > > > >> >>>>>>>> primitives defined. > > > > >> >>>>>>>> > > > > >> >>>>>>>> Thanks, > > > > >> >>>>>>>> > > > > >> >>>>>>>> -- > > > > >> >>>>>>>> > > > > >> >>>>>>>> Devon McCormick, CFA > > > > >> >>>>>>>> > > > > >> >>>>>>>> Quantitative Consultant > > > > >> >>>>>>>> > > > > >> >>>>> > > > > >> > > ---------------------------------------------------------------------- > > > > >> >>>>>>>> For information about J forums see > > > > >> >>>>> http://www.jsoftware.com/forums.htm > > > > >> >>>>>>>> > > > > >> >>>>>>> > > > > >> >>>> > > > > >> > > ---------------------------------------------------------------------- > > > > >> >>>>>>> For information about J forums see > > > > >> >>>> http://www.jsoftware.com/forums.htm > > > > >> >>>>>>> > > > > >> >>>>>> > > > > >> >>>>>> > > > > >> >>>>>> -- > > > > >> >>>>>> > > > > >> >>>>>> Devon McCormick, CFA > > > > >> >>>>>> > > > > >> >>>>>> Quantitative Consultant > > > > >> >>>>>> > > > > >> > > ---------------------------------------------------------------------- > > > > >> >>>>>> For information about J forums see > > > > >> >> http://www.jsoftware.com/forums.htm > > > > >> >>>>>> > > > > >> >>>>> > > > > >> > > ---------------------------------------------------------------------- > > > > >> >>>>> For information about J forums see > > > > >> http://www.jsoftware.com/forums.htm > > > > >> >>>>> > > > > >> >>>> > > > > >> > > ---------------------------------------------------------------------- > > > > >> >>>> For information about J forums see > > > > >> http://www.jsoftware.com/forums.htm > > > > >> >>>> > > > > >> >>> > > > > > ---------------------------------------------------------------------- > > > > >> >>> For information about J forums see > > > > >> http://www.jsoftware.com/forums.htm > > > > >> >> > > > > >> >> > > > > > ---------------------------------------------------------------------- > > > > >> >> For information about J forums see > > > > http://www.jsoftware.com/forums.htm > > > > >> >> > > > > >> > > > > ---------------------------------------------------------------------- > > > > >> > For information about J forums see > > > > http://www.jsoftware.com/forums.htm > > > > >> > > > > > >> > > > > >> -- > > > > >> ---------------------- > > > > >> mail written using NEO > > > > >> neo-layout.org > > > > >> > > > > >> > > ---------------------------------------------------------------------- > > > > >> For information about J forums see > > > http://www.jsoftware.com/forums.htm > > > > >> > > > > > > > > > > ---------------------------------------------------------------------- > > > > For information about J forums see > http://www.jsoftware.com/forums.htm > > > > > > > > > > > > > -- > > > > > > Devon McCormick, CFA > > > > > > Quantitative Consultant > > > ---------------------------------------------------------------------- > > > For information about J forums see http://www.jsoftware.com/forums.htm > > > > > ---------------------------------------------------------------------- > > For information about J forums see http://www.jsoftware.com/forums.htm > > > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm > -- Devon McCormick, CFA Quantitative Consultant ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
