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268 alternative := alternative mod 10 ; If you read closely, you will notice that when we add 10 to the alternative, we get a page dependant graphic. So, in fact we have five alternatives. We use CONTEXT macros to fetch the (real) page number and the number of the last page. In further calculations we use the lower alternative numbers, which is why we apply a mod. The rest of the code is not so much different from the previous definition. The hard coded point sizes match the page dimensions (600pt by 450pt) quite well. t := identity if alternative=3: shifted (9pt,-9pt) fi ; randomseed := seed ; p := Field[Text][Text] enlarged if alternative = 1 : 36pt superellipsed superness elseif alternative = 2 : 36pt squeezed squeezeness elseif alternative = 3 : 36pt randomized randomness else : 36pt fi ; pickup pencircle scaled 3pt ; fill Page withcolor \MPcolor{yellow} ; fill p withcolor \MPcolor{white} ; draw p withcolor \MPcolor{red} ; randomseed := seed ; p := ( Field[Text][Text] enlarged if alternative = 1 : 48pt superellipsed superness elseif alternative = 2 : 48pt squeezed squeezeness elseif alternative = 3 : 36pt randomized randomness else : 48pt fi ) transformed t ; def right_menu_button (expr nn, rr, pp, xx, yy, ww, hh, dd) = if (pp>0) and (rr>0) : q := rightsuperbutton(p,xx,yy,RightEdgeWidth,hh) ; fill q withcolor \MPcolor{white} ; draw q withcolor if rr=2 : \MPcolor{gray} else : \MPcolor{red} fi ; fi ; enddef ; \MPmenubuttons{right} StopPage ; \stopuseMPgraphic When we choose the alternatives 21 and 22 we get this result: Defining styles Adaptive buttons
A Few Nice Quotes A Simple Style Demo Hans Hagen, August 2000 A Few Nice Quotes A Simple Style Demo Hans Hagen, August 2000 Douglas R. Hofstadter Donald E. Knuth Edward R. Tufte Hermann Zapf close Douglas R. Hofstadter Donald Knuth has spent the past several years working on a system allowing him to control many aspects of the design of his forthcoming books.from the typesetting and layout down to the very shapes of the letters! Seldom has an author had anything remotely like this power to control the final appearance of his or her work. Knuth's TEX typesetting system has become well-known and available in many countries around the world. By contrast, his METAFONT system for designing families of typefaces has not become as well known or available. In his article “The Concept of a Meta-Font”, Knuth sets forth for the first time the underlying philosophy of METAFONT, as well as some of its products. Not only is the concept exiting and clearly well executed, but in my opinion the article is charmingly written as well. However, despite my overall enthusiasm for Knuth's idea and article, there are some points in it that I feel might be taken wrongly by many readers, and since they are points that touch close to my deepest interests in artificial intelligence and esthetic theory, I felt compelled to make some comments to clarify certain important issues raised by “The Concept of a Meta-Font”. Douglas R. Hofstadter Donald E. Knuth Edward R. Tufte Hermann Zapf close Donald E. Knuth Thus, I came to the conclusion that the designer of a new system must not only be the implementer and first large--scale user; the designer should also write the first user manual. The separation of any of these four components would have hurt TEX significantly. If I had not participated fully in all these activities, literally hundreds of improvements would never have been made, because I would never have thought of them or perceived why they were important. But a system cannot be successful if it is too strongly influenced by a single person. Once the initial design is complete and fairly robust, the real test begins as people with many different viewpoints undertake their own experiments. Douglas R. Hofstadter Donald E. Knuth Edward R. Tufte Hermann Zapf Adaptive buttons Defining styles close Edward R. Tufte We thrive in information--thick worlds because of our marvelous and everyday capacity to select, edit, single out, structure, highlight, group, pair, merge, harmonize, synthesize, focus, organize, condense, reduce, boil down, choose, categorize, catalog, classify, list, abstract, scan, look into, idealize, isolate, discriminate, distinguish, screen, pigeonhole, pick over, sort, integrate, blend, inspect, filter, lump, skip, smooth, chunk, average, approximate, cluster, aggregate, outline, summarize, itemize, review, dip into, flip through, browse, glance into, leaf through, skim, refine, enumerate, glean, synopsize, winnow the wheat from the chaff and separate the sheep from the goats. Douglas R. Hofstadter Donald E. Knuth Edward R. Tufte Hermann Zapf close Hermann Zapf Coming back to the use of typefaces in electronic publishing: many of the new typographers receive their knowledge and information about the rules of typography from books, from computer magazines or the instruction manuals which they get with the purchase of a PC or software. There is not so much basic instruction, as of now, as there was in the old days, showing the differences between good and bad typographic design. Many people are just fascinated by their PC's tricks, and think that a widely--praised program, called up on the screen, will make everything automatic from now on. page 1 page 2 page 3 page 4 page 5 Douglas R. Hofstadter Donald E. Knuth Edward R. Tufte Hermann Zapf close Douglas R. Hofstadter Donald Knuth has spent the past several years working on a system allowing him to control many aspects of the design of his forthcoming books.from the typesetting and layout down to the very shapes of the letters! Seldom has an author had anything remotely like this power to control the final appearance of his or her work. Knuth's TEX typesetting system has become well-known and available in many countries around the world. By contrast, his METAFONT system for designing families of typefaces has not become as well known or available. In his article “The Concept of a Meta-Font”, Knuth sets forth for the first time the underlying philosophy of METAFONT, as well as some of its products. Not only is the concept exiting and clearly well executed, but in my opinion the article is charmingly written as well. However, despite my overall enthusiasm for Knuth's idea and article, there are some points in it that I feel might be taken wrongly by many readers, and since they are points that touch close to my deepest interests in artificial intelligence and esthetic theory, I felt compelled to make some comments to clarify certain important issues raised by “The Concept of a Meta-Font”. Douglas R. Hofstadter Donald E. Knuth Edward R. Tufte Hermann Zapf close Donald E. Knuth Thus, I came to the conclusion that the designer of a new system must not only be the implementer and first large--scale user; the designer should also write the first user manual. The separation of any of these four components would have hurt TEX significantly. If I had not participated fully in all these activities, literally hundreds of improvements would never have been made, because I would never have thought of them or perceived why they were important. But a system cannot be successful if it is too strongly influenced by a single person. Once the initial design is complete and fairly robust, the real test begins as people with many different viewpoints undertake their own experiments. Douglas R. Hofstadter Donald E. Knuth Edward R. Tufte Hermann Zapf close Edward R. Tufte We thrive in information--thick worlds because of our marvelous and everyday capacity to select, edit, single out, structure, highlight, group, pair, merge, harmonize, synthesize, focus, organize, condense, reduce, boil down, choose, categorize, catalog, classify, list, abstract, scan, look into, idealize, isolate, discriminate, distinguish, screen, pigeonhole, pick over, sort, integrate, blend, inspect, filter, lump, skip, smooth, chunk, average, approximate, cluster, aggregate, outline, summarize, itemize, review, dip into, flip through, browse, glance into, leaf through, skim, refine, enumerate, glean, synopsize, winnow the wheat from the chaff and separate the sheep from the goats. Douglas R. Hofstadter Donald E. Knuth Edward R. Tufte Hermann Zapf close Hermann Zapf Coming back to the use of typefaces in electronic publishing: many of the new typographers receive their knowledge and information about the rules of typography from books, from computer magazines or the instruction manuals which they get with the purchase of a PC or software. There is not so much basic instruction, as of now, as there was in the old days, showing the differences between good and bad typographic design. Many people are just fascinated by their PC's tricks, and think that a widely--praised program, called up on the screen, will make everything automatic from now on. page 1 page 2 page 3 page 4 page 5 Douglas R. Hofstadter Donald E. Knuth Edward R. Tufte Hermann Zapf close Douglas R. Hofstadter Donald E. Knuth Edward R. Tufte Hermann Zapf close 269
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Hans Hagen metafun context mkiv
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Introduction This document is about
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Content Conventions . . . . . . . .
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1 Conventions When reading this man
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1 Welcome to MetaPost 1.1 Paths 2 I
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The open path is defined as: (1cm,1
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1.2 Transformations We can store a
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(x,y) zscaled (u,v) (xu − yv,xv +
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z0 = (0.5cm,1.5cm) ; z1 = (2.5cm,2.
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4 0 1 3 2 "z0..z1..z2..z3..z0" Only
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0 1 3 2 "z0..z1..z2--z3" Watch how
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0 1 0 2 2 1 "(z0..z1..z2..z3) cutaf
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2 0 1 Using ( ) is not mandatory bu
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0 4 1 3 2 0 These two graphics were
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Since we don't consider this unfill
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First there is the concept of varia
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1.8 Loops Yet another programming c
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If in the definition of doublescale
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test (a) (b) (c) (d) ; test (a,b) (
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If you forget about the colors, the
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linejoin=mitered linecap=butt linej
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1.15 Text Most dashpatterns can be
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Z13 Z24 Z14 Z1 Z12 Z2 Z21 Z23 Z11 Z
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3 Because we want to call this macr
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dotlabel.rt ("$Z_{3}$", z3) ; dotla
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A different approach is to use a tw
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The graphic extends beyond the boun
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p := (p shifted (5cm,0)) randomized
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path p ; p := (0,0) -- (2cm,3cm) ;
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path p ; p := (0cm,0cm) -- (4cm,1cm
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Here, the image macro creates an (a
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So, in addition to on to specify a
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Watch how we can pass a point (poin
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2 A few more details In this chapte
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The second line does just as it say
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fill shape ; draw shape ; filldraw
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2.3 Units 6 As you can see here, as
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2.4 Scaling and shifting When we dr
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Especially when a path results from
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points first order curve second ord
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first iteration second iteration th
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and get: We don't even need that mu
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Figure 2.3 Circles with minimized i
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The tension specifier can be used t
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The asymetrical tensions are less p
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z0 .. z1 .. z2 z0 {curl 1} .. z1 ..
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7 In literature concerning POSTSCRI
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currentpicture := currentpicture sl
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We can achieve this by defining poi
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We're still not there. Like in a pr
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Due to the thicker line width used
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left up down right The previous def
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Here the & glues strings together,
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picture p ; p := "MetaFun" normalin
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pickup pencircle scaled 2pt ; draw
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Because the z--variables are used f
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3 Embedded graphics In addition to
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\startMPcode fill fullcircle scaled
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\startuniqueMPgraphic{right or wron
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{\externalfigure[mprun:extrafun::my
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\startlinecorrection[blank] \proces
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In order to prevent problems, we ad
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There are a few more low level swit
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When we convert color to gray, we u
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4 Enhancing the layout One of the m
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4.2 Overlay variables [offset=3pt,f
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This background demonstrates that a
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As you may know, TEX's ambassador i
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This works as expected: \RotatedTex
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We will now apply this knowledge of
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p := p shifted (2o,OverlayHeight-yp
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We demonstrated that when defining
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5 Positional graphics In this chapt
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5.2 Anchors and layers In a previou
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pab := pab cutafter (pab intersecti
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fill p withcolor \MPcolor{lightgray
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The previous example also demonstra
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\setMPlayer [test] [somepos-1] [loc
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6 Page backgrounds Especially in in
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As soon as you want to make an elec
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do_it (1,4,false) ; do_it (5,4,fals
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gigigi Watch how the bounding boxes
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You can test this concept yourself
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StartPage ; fill Area[Text][Text] s
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fi ; Main := Main enlarged 6pt ; pi
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ulcorner Field[Text] [Text] -urcorn
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The left picture demonstrates what
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There are two more operators: inner
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7 Shapes, symbols and buttons One c
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Table 7.1 demonstrates how scratch
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for i := 1 upto \MPvar{n} : xpos :=
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This table is defined as: \bTABLE[f
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Since we have collected some nice b
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8 Special effects Sometimes we want
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Because of this implementation, sha
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test_shade(origin shifted (.25cm,0)
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fill p shifted (3cm,0) withcolor .5
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\definecolor [tred] [r=1,t=.5,a=exc
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Figure 8.4 Another clipped cow. \pl
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withpen pencircle scaled 4mm withco
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Because this graphic is the result
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The resulting PDF file can be inclu
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Including another METAPOST graphic,
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After these examples your are proba
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In this graphic, we have two text f
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} {}} Here we feed some MATHML int
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9 Functions METAPOST provides a wid
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9.2 Grids Some day you may want to
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13 13 13 13 Figure 9.1 Quick and di
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Page 223 and 224: Figure 9.3 By using transparent col
Page 225 and 226: There are enough applications out t
Page 227 and 228: Of course we could extend this LUA
Page 229 and 230: 10 Typesetting in METAPOST It is sa
Page 231 and 232: Meta is a female lion! Figure 10.2
Page 233 and 234: We use the low level CONTEXT macro
Page 235 and 236: So, now we have: M etaPostisFun! Wh
Page 237 and 238: n := n + 1 ; len[n] := \the\wd\MPbo
Page 239 and 240: ap := point at of RotPath ; ad := d
Page 241 and 242: \startoverlay {\startuseMPgraphic{f
Page 243 and 244: \startuseMPgraphic{text draw} draw
Page 245 and 246: vsize := ypart urcorner p - ypart l
Page 247 and 248: We are now ready for an attempt to
Page 249 and 250: We can manipulate the heigth and de
Page 251 and 252: \strutheight) ; % height of first l
Page 253 and 254: w := h := 6cm ; o := 6pt ; path p ;
Page 255 and 256: Donald Knuth has spent the past sev
Page 257 and 258: Donald Knuth has spent the past sev
Page 259 and 260: 11 Debugging Those familiar with CO
Page 261 and 262: 4 3 5 2 6 1 0 7 8 You can pass opti
Page 263 and 264: 3 4 0 2 1 Of course you may want to
Page 265 and 266: 12 Defining styles Since the integr
Page 267 and 268: color=gray, contrastcolor=gray, sty
Page 269 and 270: def right_menu_button (expr nn, rr,
Page 271: \Topic {Edward R. Tufte} \input tuf
Page 275 and 276: 13 A few applications For those who
Page 277 and 278: vardef spring (expr a, b, w, h, n)
Page 279 and 280: There is a numeric constant labelof
Page 281 and 282: text text text text text text text
Page 283 and 284: p := fullcircle scaled (2*length(lo
Page 285 and 286: These definitions of anglebetween a
Page 287 and 288: Because in most cases we want the l
Page 289 and 290: γ δ β ɛ α ζ δ γ β ɛ metho
Page 291 and 292: There are for sure more (efficient)
Page 293 and 294: The next circle that we draw shows
Page 295 and 296: popcurrentpicture ; enddef ; Here,
Page 297 and 298: draw (u,i) -- (2u,i) withcolor .5wh
Page 299 and 300: Figure 13.4 Koffka's examples of ma
Page 301 and 302: \startbuffer[a] def start_everythin
Page 303 and 304: pointC := circleA intersectionpoint
Page 305 and 306: draw_basics ; draw_circles ; draw_i
Page 307 and 308: Figure 13.6 Bisecting a line segmen
Page 309 and 310: z1 = (0, height/2) ; z2 = (width/2-
Page 311 and 312: The clipping path is applied by say
Page 313 and 314: 13.8 Music sheets The next example
Page 315 and 316: The euro symbol A few applications
Page 317 and 318: draw i withpen pencircle scaled 1pt
Page 319 and 320: 16 draw b withpen pencircle scaled
Page 321 and 322: \startMPcode \includeMPgraphic{gamb
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14 METAFUN macros CONTEXT comes wit
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A METAPOST syntax In the METAFONT b
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〈number or fraction〉 → 〈num
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〈suffix〉 → 〈empty〉 | 〈s
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〈assignment〉 → 〈variable〉
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〈command〉 → clip 〈picture v
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〈if test〉 → if 〈boolean exp
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B This document This document is pr
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C Reference C.1 Paths In this chapt
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tension atleast numeric (0,0)..(.75
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angle origin--dir(angle(1,1)) metap
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circle bcircle metafun variable lci
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path randomized numeric/pair unitsq
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path stretched numeric/pair (fullci
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path zscaled pair fullcircle zscale
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path llenlarged numeric fullcircle
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path urmoved numeric fullcircle urm
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everse path reverse fullcircle shif
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oundingbox path boundingbox fullcir
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C.3 Points top pair top center full
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C.4 Attributes withcolor rgbcolor w
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draw draw fullcircle metapost macro
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ounded linecap := rounded metapost
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label.top label.top("MetaFun",origi
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D Literature There is undoubtly mor
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Index a anchoring 143, 145 angles 2
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This document introduces you in the
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