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E18 MAPS 39 Kees van der Laan First-In-First-Out paradigm, as published in MAPS92.2 revised 1995, titled FIFO and LIFO sing the BLUes- --Got it? To end recursion a (classical) sentinel is appended and macro tokens are gobbled, the latter instead of Knuth’s multiple use of \next. The assignment inhibits processing in the mouth, which in general I do not consider that relevant. This gobbling up of macro text in the mouth I use abundantly, e.g. in my TEX macro for quicksort, as published in MAPS96.2. It also shows that sometimes we have to test for spaces and that sometimes the %-character is mandatory, especially wheninadventory spaces turnyoudown. My currentsolution reads \def\fifo#1{\ifx\ofif#1\ofif \else \ifx\space#1\space \else\blankbox{#1}% \fi \fi \fifo} \def\ofif#1\fifo{\fi} % \def\blankbox#1{\setbox0=\hbox{#1} \hbox{\lower\dp0 \vbox{\hrule \hbox{\vrule\phantom{#1}\vrule} \hrule}}} % \def\demobox#1{\leavevmode\fifo#1\ofif} %with use \demobox{My case rests. Have fun and all the best.} Is the use of \ifx essential, or could \if, respectively \ifcat, have beenused? Earlier, I had a solution where I read the line word by word using a space as parameter separator, circumventing explicit testing for spaces. So, at least three variants are available for discussing the pro-and-cons. Iamcuriousfor GUST’sapproach,becausetheyhavethe boundingboxesofeachcharacterinGUSTaspartoftheir logo. Undoubtedly ingenious. Knuth uses the functionality in as well the TEXbook ch18, to illustrate his explanation of the transformation of a math formula specication into a sequence of (boxed) atoms, as the MetaFontbook ch12 on Boxes. Reuse, aha! Wind macros Despite the powerful MetaPost, I will talk for the rst time about my plain TEX turtle line drawing graphics macrosof ≈13yearsago,whichIhaveusedforavariant solutionoftheTEXbookexercise22.14(seelater),butalso for drawing some fractals, e.g. my favorite the Binary tree and the H-fractal (to be introduced later), a square spiral, and a Pythagorean tree, as well as a variant of the Sierpinsky triangle given at the end, as application ofKnuth’sdragonguresapproachinappendixDofthe TEXbook.Theincludedsmileysarenew,theyreplacethe old ones in pic.dat, because like Hans Hagen I guess, I’ll do all my graphics in MetaPost or PS from now on. Revision, aha! The wind macros can still be handy for sketches in TEX alone, although I programmed already some fractals in PS directly. If time permits I might nish my fractals note, withthe graphics in PSand MP. \N, \E, \S, and \W, draw a line element from the point (\x, \y) of size as supplied by the argument in the direction North, East, South, or West, respectively. The line element is encapsulated in a box of size 0, meaning the drawingdoes not change the referencepoint. \def\N#1{\xy{\kern-.5\linethickness \vbox to0pt{\vss \hrule height#1\unitlength width\linethickness}}% \advance\y#1\unitlength} % \def\S#1{\advance\y-#1\unitlength{\N{#1}}} % %\E and \W read similar, see my %Paradigms: the winds and halfwinds. MAPS 96.1 % \def\xy#1{%Function: place #1 at \x, \y \vbox to0pt{\kern-\y \hbox to0pt{\kern\x#1\hss}\vss}} \xyissimilartoKnuth’s\pointmacroofAppendixDof the TEXbook. A straight application of the wind macros is the above shown (inward) square spiral, which is drawn by the macro listed below, where the number of windings is supplied in the counter \k, and the coordinates (\x, \y) contain the starting point for the drawing. Note that during the drawing one has not to be aware of the coordinates, they are implicit. In order to display a centralized gure supply \x = −\k∗\unitlength \y = \k∗\unitlength andenclose it inabox ofheight,widthanddepth .5\k∗\unitlength.
TEX Education EUROTEX 2009 E19 \def\inwardspiral{{\offinterlineskip \loop\E{\the\k}\advance\k-1 \S{\the\k}\advance\k-1 \W{\the\k}\advance\k-1 \N{\the\k}\advance\k-1 \ifnum\k>4 \repeat}} Contest I needed for the graphics inclusion in this paper, and in the slides,aminimal markupmacro \jpg. DuringmypresentationIlaunchedaminimalmarkup problem. I wanted to replace the following markup with optional width... height... $$\pdfximage height..width... {filename.jpg} \pdfrefximage\pdflastximage$$ by either the minimal markup \jpgD filename or \jpgD width... filename or \jpgD height... filename or \jpgD height... width... filename Nosquarebrackets,nocurlybraces,andevennoexplicit le extension, becauseit isalready inthe macro name. Ichallenged the audience to write such amacro. There would be two winners one appointed by me and oneby the audience. 18 And... the winner is... Péter Szabó, by me and by the audience, withthe followingsolution \def\jpgfilename#1 {% \egroup %end \setbox0\vbox $$\pdfximage% \ifdim\wd0=0pt\else width\wd0\fi \ifdim\ht0=0pt\else height\ht0\fi {#1.jpg}% \pdfrefximage\pdflastximage$$ \endgroup} \def\jpgD{% \begingroup \setbox0\vbox\bgroup \hsize0pt \parindent0pt \everypar{\jpgfilename}% \hrule height0pt } Elegant, to associate the optional parameter with a \hrule and measure it by putting it in a box. Elegant it is. But... I must confess, it took me some time to understand it. A MasterClasswouldhavebeenbenecialforme,tolearn to understandthese kindsofmacros more quickly . The near winner was Bernd Raichle with a thorough, straight-forward solution, not avoiding the pitfall, and whichisabittoo long to includeinthisnote. But... it shows a superb, elaborate parsing technique looking for width.. height...andthentakeappropriateaction. Post conference Phil Taylor came up with a near, but intriguingsolutionandImyselfalsoboiledupone.Both are supplied in the Appendix I, because much can be learnedfromthem.Bothneglectthe(unintended)pitfall toconcentrateontheparsingoftheoptionalparameters. PhilandIjustpassontheoptionalparameters,ifany,to \pdfximage. 2D Graphics Line drawings with incremental diculties are included anddiscussed, such as straight linedrawings by the windmacros andby gkppicinplainTEX, and PS, such asfractalsand owcharts graphics withcurved lines by PS and MP, such as graphics composed ofobliquelines (andspurious envelopes),circles,andgeneralcurves, to be drawn by splines. Binary tree I consider my binary tree macro as very beautiful, because it can be programmed so nicely in TEX or PS, and has such interesting applications. I consider it much in the spirit of Knuth’s Turing award lecture Computer Programming asanArt. \def\bintree{\E{\the\kk}% \ifnum\kk=2 \eertnib\fi \divide\kk2 {\N{\the\kk}\bintree}% \S{\the\kk}\bintree}% \def\eertnib##1\bintree{\fi}%terminator This mean and lean macro from the past can be adapted to yourneeds. The above \bintree I used for a Turtle graphics, non-\alignment, solution of the TEXbook exercise 22.14, which reects the binary structure. En-passant, NTG’s VIPsreplace the original namesgiveninthe TEXbook.
Page 1 and 2: Proceedings MAPS 39 • TUGboat 30:
Page 3: Table of Contents EuroTEX 2009, Han
Page 8 and 9: E4 MAPS 39 TUG 2010 TEX’s 2 5 ann
Page 10 and 11: E6 MAPS 39 Kees van der Laan What T
Page 12 and 13: E8 MAPS 39 Kees van der Laan andthe
Page 14 and 15: E10 MAPS 39 Kees van der Laan I hav
Page 16 and 17: E12 MAPS 39 Kees van der Laan Knuth
Page 18 and 19: E14 MAPS 39 Kees van der Laan have
Page 20 and 21: E16 MAPS 39 Kees van der Laan I mus
Page 24 and 25: E20 MAPS 39 Kees van der Laan The p
Page 26 and 27: E22 MAPS 39 Kees van der Laan drawa
Page 28 and 29: E24 MAPS 39 Kees van der Laan Synta
Page 30 and 31: E26 MAPS 39 Kees van der Laan Essen
Page 32 and 33: E28 MAPS 39 Kees van der Laan NaumG
Page 34 and 35: E30 MAPS 39 Kees van der Laan The a
Page 36 and 37: E32 MAPS 39 Kees van der Laan 19. M
Page 38 and 39: E34 MAPS 39 Luigi Scarso LuaTEX lun
Page 40 and 41: E36 MAPS 39 Luigi Scarso It’s bet
Page 42 and 43: E38 MAPS 39 Luigi Scarso So we must
Page 44 and 45: E40 MAPS 39 Luigi Scarso luatex-sna
Page 46 and 47: E42 MAPS 39 Luigi Scarso it’s bou
Page 48 and 49: E44 MAPS 39 Luigi Scarso ghost.appe
Page 50 and 51: E46 MAPS 39 Luigi Scarso andimport
Page 52 and 53: E48 MAPS 39 Luigi Scarso \externalf
Page 54 and 55: E50 MAPS 39 Luigi Scarso %% \startl
Page 56 and 57: E52 MAPS 39 Luigi Scarso [8] http:/
Page 63 and 64: Willi Egger EUROTEX 2009 E59 Decora
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Decorating CD-ROMs and DVDs EUROTEX
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Decorating CD-ROMs and DVDs EUROTEX
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The language mix EUROTEX 2009 E73 S
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The language mix EUROTEX 2009 E75 \
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The language mix EUROTEX 2009 E77 T
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E16 & DEtool: typesetting language
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E16 & DEtool: typesetting language
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E86 MAPS 39 Siep Kroonenberg A netw
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E88 MAPS 39 Siep Kroonenberg machin
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E90 MAPS 39 Siep Kroonenberg Additi
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E92 MAPS 39 Jean-Michel Hufflen Usi
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E94 MAPS 39 Jean-Michel Hufflen fun
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E96 MAPS 39 Jean-Michel Hufflen (de
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E98 MAPS 39 Jean-Michel Hufflen Not
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E100 MAPS 39 A.-M. Aebischer, B. Ae
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Stanislav Jan Šarman EUROTEX 2009
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Writing Pitman shorthand with Metaf
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Writing Pitman shorthand with Metaf
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Optimizing PDF output size of TEX d
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Taco Hoekwater EUROTEX 2009 E131 Ge
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Generating PDF for e-reader devices
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Generating PDF for e-reader devices
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LuaTEX says goodbye to Pascal EUROT
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LuaTEX says goodbye to Pascal EUROT
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Taco Hoekwater EUROTEX 2009 E141 Th
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Hans Hagen & Taco Hoekwater EUROTEX
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John Trapp EUROTEX 2009 E145 Using
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Using L ATEX as a computing languag
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Experiences typesetting mathematica
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Abstracts without papers UsingTEXFo
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Abstracts without papers EUROTEX 20
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The information here comes from the
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