On Wed, Mar 24, 2021 at 4:14 AM Kurt Pagani <nil...@gmail.com> wrote: > > I'm gatecrashing the party as I have unfortunately missed most of the latest > conversation. I had a discussion with Ralf recently and we agree that the > current X11 graphics ought to be enough for illustrative purposes (it also > works > in jfricas and one can - in principle - include the graphics with ease into > the > notebook as described in the **deprecated** doc draft: > https://nilqed.github.io/jfricas.pip/sphinx/_build/html/usage.html#draw > > Since "graphics" is not may favourite subject either, enthusiasm has to be > fueled. Nevertheless I have been trying out various approaches with the > objective of "publication quality figures" in mind. I'd summarize the current > situation as follows: > > - X11 draw works fine (but some people find it ugly) > - Bill's gnuDraw (works, requires gnuplot) > - Martin's Scene Graph (works, sophisticated) > (https://www.euclideanspace.com/prog/scratchpad/mycode/graph/index.htm) > - Sixel graphics (requires xterm or similar sixel capable terminal (few) + > non-X gnuplot. I like it. > > Since (AFAIK) there is no graphics library for CL, I see no alternative other > than resorting to an external tool - nobody will write a lib from scratch ;)
there is no graphics in CL standard, but you certainly have plenty of choices to pick CL bindings to various graphics libraries https://www.cliki.net/graphics%20library > There a hundreds (maybe exaggerated) of such plotting libraries written in JS, > Java, Python etc. and some few written in C/C++. To narrow down the search it > should be at least BSD licensed, mature and provide pub quality: > > Asymptote is LGPL, so not first choice. > https://en.wikipedia.org/wiki/Asymptote_(vector_graphics_language) > > PGF/Tikz is GPL or LaTeX PPL > https://en.wikipedia.org/wiki/PGF/TikZ > The top-level PGF and TikZ commands are invoked as TeX macros, but in contrast > with PSTricks, the PGF/TikZ graphics themselves are described in a language > that > resembles MetaPost. This would be my second choice. > > GLE - my favourite, BSD with a QT frontend lic. LGPL > https://en.wikipedia.org/wiki/Graphics_Layout_Engine > > GLE satisfies all requirements. > https://glx.sourceforge.io/ > https://glx.sourceforge.io/examples/index.html > > It's essentially a command line tool which can produce a lot of formats e.g. > EPS, PS, PDF, JPEG, and PNG. The frontend (QGLE) is relatively new, yet very > handy in that one can manipulate the sources on the fly with automated update > of > what you see ... > > kfp@euler:~$ gle --help > GLE version 4.2.5 > Usage: gle [options] filename.gle > More information: gle -help > > Options: > -help Shows help about command line options > -info Outputs software version, build date, GLE_TOP, GLE_BIN, etc. > -verbosity Sets the verbosity level of GLE console output > -device Selects output device(s) > -cairo Use cairo output device > -resolution Sets the resolution for bitmap and PDF output > -fullpage Selects full page output > -landscape Selects full page landscape output > -output Specifies the name of the output file > -nosave Don't write output file to disk (dry-run) > -preview Previews the output with QGLE > -version Selects a GLE version to run > -compatibility Selects a GLE compatibility mode > -calc Runs GLE in "calculator" mode > -catcsv Pretty print a CSV file to standard output > -tex Indicates that the script includes LaTeX expressions > -inc Creates an .inc file with LaTeX code > -texincprefix Adds the given subdirectory to the path in the .inc file > -mkinittex Creates "inittex.ini" from "init.tex" > -finddeps Automatically finds dependencies > -nocolor Forces grayscale output > -inverse Render black as white for using on dark backgrounds > -transparent Creates transparent output (with -d png) > -noctrl-d Excludes CTRL-D from the PostScript output > -nomaxpath Disables the upper-bound on the drawing path complexity > -noligatures Disable the use of ligatures for 'fl' and 'fi' > -gsoptions Specify additional options for GhostScript > -safemode Disables reading/writing to the file system > -allowread Allows reading from the given path > -allowwrite Allows writing to the given path > -keep Don't delete temporary files > > Show expert options: -help expert > Give more help about a given option: -help option > > --- > > For the sake of completeness I mention that we (Ralf and me) tried Gnuplot 5+ > (http://www.gnuplot.info/) - the new HTML canvas) and matplotlib > (https://matplotlib.org/). The results can be seen in the attached > ipysh_and_mplot.html and in the **deprecated** > https://nilqed.github.io/jfricas.pip/sphinx/_build/html/gnuplot.html. These > seems to me, however, not a long-term perspective because dev/release cycles > of > this packages are quite rapid, users have to know/learn special syntax and > last > but not least it might depend on browser flavour and javascript libraries. > > So, coming to an end, my suggestion is to build upon GLE by utilizing the > Fricas > domains Plot and Plot3D. The idea is to create a graphic object (a Record in > SPAD) that may be manipulated (overwrite defaults) and displayed in QGLE, > Texmacs, Jupyter or finalized in one of the graphic formats (ps, png etc.). > > Instead of tiresome explanations I have attached a demo_gle.tar.gz containing > a > rudimentary prototype, albeit one has to install the prerequisites: > > sudo apt install gle-graphics > sudo apt install ghostscript # for TeX text/titles, otherwise optional > > # checks > apt list -a gle-graphics > gle-graphics/bionic,now 4.2.5-7 amd64 [installed] > > apt list -a ghostscript > ghostscript/bionic 9.22~dfsg+1-0ubuntu1 amd64 > > # test > > $ qgle > should open an window, and > > $ gle --version > GLE version 4.2.5 > Usage: gle [options] filename.gle > More information: gle -help > > To run the demo, extract "demo_gle.tar.gz" into /tmp or wherever, start > fricas and > > )read demo_qgle > > which compiles gle.spad and provides two functions, demo() and demo3d(). > Starting with > > demo() > > a first QGLE windows should open. The show will proceed when closing one > window > after another (by upper right [X]), about five times. This should give an > impression about the quality and the features of QGLE. > The same can be done with > > demo3d() -- only 2 windows ;) > > Another - more simple - approach could be to tune view2D.spad, view3D.spad and > draw.spad allowing (users choice) different frontends for the "draw" command. > I > did this 5y ago (https://github.com/nilqed/fricas_input/tree/master/spad/draw, > see the patches and drawfe.spad), the result of test_draw.input can be seen > here: https://kfp.bitbucket.io/drawfe/ (just an example as gnuplot sixel > (gnuplot itself provides a huge amount of 'set terminal' options). I would not > pursue this; too little gain for my taste compared to the builtin graphics. > > Now it's up to the community to set the agenda. If no one is interested, then > we > should allow the topic to rest awhile. The inventive mind will hardly produce > graphics form within fricas anyway? > > > On 23.03.2021 21:23, Ralf Hemmecke wrote: > >> How easy would it be to try KaTeX? https://katex.org/ Maybe someone > >> has already tried this? > > It has actually improved since I tried some years ago (was not complete, but > fast). Using it in Jupyter might certainly be an option. At the moment, > however, > MathJax is a dependency of Jupyter (installed with the core nb) and has some > advantages over KaTeX (AFAIK, might have changed) in that one can easily pick > the LaTeX source code by right clicking on the displayed formula. Moreover, > I'm > quite sure that the speed of MathJax will improve in the near future (it's not > so bad at all). > > > I cannot say. That is the first time I look at Katex. If it really > > renders faster that would be wonderful. But I wait until somebody throws > > a working .ipynb -> .html conversion at me that replaces mathjax with > > katex in the .html flle so that I would see how to actually use it. > >> It seems to me that Kurt has already experimented with several options > >> and that his opinion was that we should just pick one of these and run > >> with it. > > > > Yes, but I am not sure whether his stuff was already ripe for production. > > You're right, far from production, however if there is a compass, I guess it > will be doable in reasonable time, but as I am more the 'prototyper' (I dread > the last mile) it won't go without your discipline and persistency :) > > > > Ralf > > > > -- > You received this message because you are subscribed to the Google Groups > "FriCAS - computer algebra system" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to fricas-devel+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/fricas-devel/a560d11e-3726-ba62-89eb-32e5c106236a%40gmail.com. -- You received this message because you are subscribed to the Google Groups "FriCAS - computer algebra system" group. 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