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E22 MAPS 39 Kees van der Laan drawarrow boxb.e--z1--z2; z3=boxb.w-(20,0); z4=boxc.w-(20,0); drawarrow boxc.w--z4--z3--boxb.w; endfig end Note how the diamond diagram is obtained from the information created by the boxit invoke. Henderson’s previewerdoesnotallowtheuseof boxes.mp.Ifonecan writetheaboveowchartwiththeuseofgkppicmacros, one could have coded it equally well direct in PS. To code in PS the generality incorporated in the boxes.mp is substantial more work, and unnecessary in view of the neat boxes.mp macros, which come with the PD MetaPost. In Goossens’ et al. Graphics Companion the metaobjworkofRoegelismentionedasageneralization. To understand the boxes.mp macro is a good exercise in becomingfamiliarwiththesuffixconcept,aunication of index and record, which Knuth introduced to handle conveniently the many related parameters in a glyph. By the way, the resulting PS is not standard PS, but named puried PostScript which is incorrect, because of the used cmr fonts. The coupling of the TEX cmr fonts to PostScript fonts, an old problem, is done by the prologues:=3;. The name of the resulting output le can be composed to one’s wishes by assigning an appropriate string to outputtemplate. 19 The lename with extension .eps facilitates previewing via Acrobat. For previewing via CSview4.9 it does not matter. The inclusion of the string (100,100) translate as value of special hinders previewing: the Bounding Box is incorrect, the calculation of the BB does not account for this PostScript inclusion. I have the impression that the PostScript code is just passed through to the output. Insertingthedesiredfontviaspecialwouldnotworkeither.Ifounditconvenienttonameboxesbeginningwith box. . ., to avoid name clashes. See for more details and possibilities the (latest version ofthe)MetaPostmanual. If only the TEX Live DVD would have provided installation directions forMetaPost. Oblique lines When my youngest daughter was at school, she produced the following object created by ‘oblique lines’ withspuriousenvelopes(left).Myemulatedresultin MP isat the right, andcreated just forthisnote. The curves, not quarter circles by the way, suggested by the oblique lines which connect points on the sides, are spurious. Below Ihave included the MPcode. beginfig(1); numeric s; s=5cm; path l, u, cl, cr; %... cl=(-s,-s){up}..(-.5s,.5s).. {right}(s,s); cr=(s,s){down}..(.5s,-.5s)..{left}(-s,-s); for t= 0 step 0.5 until 20: draw point t/10 of cl -point t/10 of cr withcolor blue; endfor; pickup pencircle scaled 3pt; draw l..u--(s,-s)--cycle withcolor blue; endfigure; Ifwerotateandshrinkappropriatelywegettheinterestinggure In Goossens’ et al. The L ATEX Graphics Companion this gure isshownasanexampleofarecursive object. 20 beginfig(0); u=1cm; drawoptions(withcolor blue); for k=0 upto 15: draw((u,-u)--(u,u)--(-u,u)-- (-u,-u)--cycle)rotated 10k; u:=.86u; endfor endfig; TheseguresareapreludetoGabo’s3Dregularsurfaces. PostProcessing by Photoshop Mywife,SvetlanaMorozova,‘shoot-shoot’postprocessed the PS ower (left) interactively via Photoshop into the nice coloredower (right). The PScode forthe ower isgivenonthe nextpage.
TEX Education EUROTEX 2009 E23 %%!PS Flower. CGL june 96 %%BoundingBox: -25 -25 25 25 0 0 1 setrgbcolor 100 100 translate /r 18 def 10{r 0 r 90 180 arc 0 r r 270 360 arc 36 rotate}repeat stroke showpage %%EOF Haveatryincoloringit.ForcomparisonIhaveincluded the MPcode below. beginfig(1); r=18; path p; drawoptions(withcolor blue); p= (0,0){up}...{right}(r,r){down} ...{left}cycle; for i=1 upto 10: draw p rotated 36i; endfor endfig end Note. In MP we don’t have to translate the origin. The connection between the knots is tight, by three dots. Interesting is that PS can draw circles while MP approximates. PostScript spaces MF and MetaPost are nice graphical languages, with convenient and powerful high-level instructions. Postscript employs the notion of a 2D user space and a 2D device space, the latter can rotate. MetaPost has a path and a picture data structure, which can be rotated, well...transformed.AnotherdierenceisthatPostScript is stack oriented and MetaPost enjoys a declarative language withathorough syntaxes. Negative from MetaPost is that the resulting Post- Script code may not be concise and readable. Values of the MP variables are given in the resulting PS and not their symbolicnames. Loopsare unwinded. Raw PostScript can be included via MetaPost’s special, however. The best ofboth worlds? 21 M.C. Escher ←Bolspiraal CGL’s →Sortof Yin Yang Aneat timelessMetaPostcode Iborrowed from Hobby beginfig(1); u=1cm; path p; p = (-u, 0)..(0,-u)..(u,0); fill p{up}..(0,0){-1,-2}..{up}cycle; draw p..(0, u)..cycle; endfig; withoutthe ‘eyes’. 22 Below my enriched PostScript variant of Hobby’s MetaPostcode, forthe realYinYangpicture. %!PS-Adobe- Yin Yang. cgl July 2009 %%BoundingBox: -25 -25 25 25 /R 25 def /hR R 2 div def /mR R neg def /mhR hR neg def /r R 5 div def /mr r neg def /rcircle {translate % center on stack r 0 moveto 0 0 r 0 360 arc }def 0 mR moveto 0 0 R 270 90 arc 0 hR hR 90 270 arcn 0 mhR hR 90 270 arc fill R 0 moveto 0 0 R 0 360 arc stroke gsave 0 hR rcircle fill grestore gsave 0 mhR rcircle 1 setgray fill grestore It diers from the MP code, because there is no direction specication in PostScript. Procrusting direction has to be done by control points in general, which are not needed in this special case. If the small discs are omitted—Hobby’s original code—the PS code is not that much longer than the MP code. Orientation is immaterial. A picture with a genuine use of control points is the Malborkwindow below.
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 22 and 23: E18 MAPS 39 Kees van der Laan First
Page 24 and 25: E20 MAPS 39 Kees van der Laan The p
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
Page 65 and 66: 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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