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Diffstat (limited to 'Master/texmf-dist/doc/metapost/base/source/examples.mp')
-rw-r--r-- | Master/texmf-dist/doc/metapost/base/source/examples.mp | 247 |
1 files changed, 247 insertions, 0 deletions
diff --git a/Master/texmf-dist/doc/metapost/base/source/examples.mp b/Master/texmf-dist/doc/metapost/base/source/examples.mp new file mode 100644 index 00000000000..0e2a8dc0a65 --- /dev/null +++ b/Master/texmf-dist/doc/metapost/base/source/examples.mp @@ -0,0 +1,247 @@ +beginfig(1); +a=.7in; b=0.5in; +z0=(0,0); z1=(a,0); z2=(0,b); +z0=.5[z1,z3]=.5[z2,z4]; +draw z1..z2..z3..z4..cycle; +drawarrow z0..z1; +drawarrow z0..z2; +label.top(btex $a$ etex, .5[z0,z1]); +label.lft(btex $b$ etex, .5[z0,z2]); +endfig; + + + + +beginfig(2); + +h=2in; w=2.7in; +path p[], q[], pp; +for i=1.5,2,4: + ii := i**2; + p[i] = (w/ii,h){1/ii,-1}...(w/i,h/i)...(w,h/ii){1,-1/ii}; +endfor +for i=.5,1.5: + q[i] = origin..(w,i*h) cutafter p1.5; +endfor + +pp = buildcycle(q0.5, p2, q1.5, p4); + +fill pp withcolor .8white; +z0=center pp; +picture lab; lab=thelabel(btex $f>0$ etex, z0); +unfill bbox lab; draw lab; +draw q0.5; draw p2; draw q1.5; draw p4; +makelabel.top(btex $P$ etex, p2 intersectionpoint q0.5); +makelabel.rt(btex $Q$ etex, p2 intersectionpoint q1.5); +endfig; + + + + +beginfig(3); + +3.2scf = 2.4in; +path fun; +# = .1; % Keep the function single-valued +fun = ((0,-1#)..(1,.5#){right}..(1.9,.2#){right}..{curl .1}(3.2,2#)) + scaled scf yscaled(1/#); + +vardef vertline primary x = (x,-infinity)..(x,infinity) enddef; +primarydef f atx x = (f intersectionpoint vertline x) enddef; +primarydef f whenx x = xpart(f intersectiontimes vertline x) enddef; + +z1a = (2.5scf,0); +z1 = fun atx x1a; +y2a=0; z1-z2a=whatever*direction fun whenx x1 of fun; +z2 = fun atx x2a; +y3a=0; z2-z3a=whatever*direction fun whenx x2 of fun; + +draw fun withpen pencircle scaled 1pt; +drawarrow (0,0)..(3.2scf,0); + +label.bot(btex $x_1$ etex, z1a); +draw z1a..z1 dashed evenly; +makelabel(nullpicture, z1); +draw z1..z2a withpen pencircle scaled .3; +label.bot(btex $x_2$ etex, z2a); +draw z2a..z2 dashed evenly; +makelabel(nullpicture, z2); +draw z2..z3a withpen pencircle scaled .3; +label.bot(btex $x_3$ etex, z3a); +endfig; + + + +beginfig(4); +for i=0 upto 2: + z[i]=(0,40i); z[i+3]-z[i]=(100,30); +endfor +pickup pencircle scaled 18; +def gray = withcolor .8white enddef; +draw z0..z3 gray; +linecap:=butt; draw z1..z4 gray; +linecap:=squared; draw z2..z5 gray; +labels.top(0,1,2,3,4,5); +endfig; linecap:=rounded; + + + +beginfig(5); +for i=0 upto 2: + z[i]=(0,50i); z[i+3]-z[i]=(60,40); + z[i+6]-z[i]=(120,0); +endfor +pickup pencircle scaled 24; +def gray = withcolor .8white enddef; +draw z0--z3--z6 gray; +linejoin:=mitered; draw z1..z4--z7 gray; +linejoin:=beveled; draw z2..z5--z8 gray; +labels.bot(0,1,2,3,4,5,6,7,8); +endfig; linejoin:=rounded; + + + +input boxes + + +\beginfig(6); +fill unitsquare xscaled 1.1in yscaled .7in withcolor .9white; +boxit(currentpicture); +dx = dy = .25in; +clearit; drawboxed(); +forsuffixes $=n,c: makelabel.top(str $, $); endfor +makelabel.bot("s",s); +forsuffixes $=ne,e,se: makelabel.rt(str $, $); endfor +forsuffixes $=nw,w,sw: makelabel.lft(str $, $); endfor +pickup pencircle scaled .3bp; +vardef larrow@#(expr a, da, s) = + drawdblarrow a..a+da; label@#(s,a+.5da); enddef; +larrow.rt(n, (0,-dy), "dy"); +larrow.rt(s, (0,dy), "dy"); +larrow.top(e, (-dx,0), "dx"); +larrow.top(w, (dx,0), "dx"); +endfig; + + + +beginfig(7); +boxjoin(a.se=b.sw; a.ne=b.nw ); +boxit.a(btex $\cdots$ etex); +boxit.ni(btex $n_i$ etex); +boxit.di(btex $d_i$ etex); +boxit.nii(btex $n_{i+1}$ etex); +boxit.dii(btex $d_{i+1}$ etex); +boxit.aa(pic_.a); +boxit.nk(btex $n_k$ etex); +boxit.dk(btex $d_k$ etex); + +di.dy = 2; +drawboxed(a,ni,di,nii,dii,aa,nk,dk); +label.lft("ndtable:", a.w); + +boxjoin(a.sw=b.nw; a.se=b.ne); +interim defaultdy:=7; +boxit.ba(); +boxit.bb(); +boxit.bc(); +boxit.bd(btex $\vdots$ etex); +boxit.be(); +boxit.bf(); +bd.dx = 8; +ba.ne = a.sw - (15,10); + +drawboxed(ba,bb,bc,bd,be,bf); +label.lft("hashtab:", ba.w); + +def ndblock suffix $ = + boxjoin(a.sw=b.nw; a.se=b.ne); + forsuffixes $$=$a,$b,$c: + boxit$$(); ($$dx,$$dy)=(5.5,4); + endfor; +enddef; + +ndblock nda; +ndblock ndb; +ndblock ndc; +nda.a.c - bb.c = ndb.a.c - nda.c.c = (whatever,0); +xpart ndb.c.se = xpart ndc.a.ne = xpart di.c; +ndc.a.c - be.c = (whatever,0); + +drawboxes(nda.a,nda.b,nda.c, ndb.a,ndb.b,ndb.c, ndc.a,ndc.b,ndc.c); + +drawarrow bb.c .. nda.a.w; +drawarrow be.c .. ndc.a.w; +drawarrow nda.c.c .. ndb.a.w; +drawarrow nda.a.c{right}..{curl0}ni.c cutafter bpath ni; +drawarrow nda.b.c{right}..{curl0}di.c cutafter bpath di; +drawarrow ndc.a.c{right}..{curl0}nii.c cutafter bpath nii; +drawarrow ndc.b.c{right}..{curl0}dii.c cutafter bpath dii; +drawarrow ndb.a.c{right}..nk.c cutafter bpath nk; +drawarrow ndb.b.c{right}..dk.c cutafter bpath dk; + +x.ptr = xpart aa.c; +y.ptr = ypart ndc.a.ne; +drawarrow subpath (0,.7) of (z.ptr..{left}ndc.c.c) dashed evenly; +label.rt(btex ndblock etex, z.ptr); +endfig; + + + + +beginfig(8) +interim circmargin := .07in; +fill unitsquare xscaled 1.1in yscaled .7in withcolor .9white; +circleit(currentpicture); +dx = dy; +clearit; drawboxed(); +forsuffixes $=n,c: makelabel.top(str $, $); endfor +makelabel.bot("s",s); +makelabel.rt("e", e); +makelabel.lft("w", w); +pickup pencircle scaled .3bp; +vardef larrow@#(expr a, da, s) = + drawdblarrow a..a+da; label@#(s,a+.5da); enddef; +larrow.rt(n, (0,-dy), "dy"); +larrow.rt(s, (0,dy), "dy"); +larrow.top(e, (-dx,0), "dx"); +larrow.top(w, (dx,0), "dx"); +endfig; + + + + +beginfig(9); +vardef cuta(suffix a,b) expr p = + drawarrow p cutbefore bpath.a cutafter bpath.b; + point .5*length p of p +enddef; + +vardef self@# expr p = + cuta(@#,@#) @#.c{curl0}..@#.c+p..{curl0}@#.c enddef; + +verbatimtex \def\stk#1#2{$\displaystyle{\matrix{#1\cr#2\cr}}$} etex +circleit.aa("Start"); aa.dx=aa.dy; +circleit.bb(btex \stk B{(a|b)^*a} etex); +circleit.cc(btex \stk C{b^*} etex); +circleit.dd(btex \stk D{(a|b)^*ab} etex); +circleit.ee("Stop"); ee.dx=ee.dy; + +numeric hsep; +bb.c-aa.c = dd.c-bb.c = ee.c-dd.c = (hsep,0); +cc.c-bb.c = (0,.8hsep); +xpart(ee.e - aa.w) = 3.8in; +drawboxed(aa,bb,cc,dd,ee); + +label.ulft(btex$b$etex, cuta(aa,cc) aa.c{dir50}..cc.c); +label.top(btex$b$etex, self.cc(0,30pt)); +label.rt(btex$a$etex, cuta(cc,bb) cc.c..bb.c); +label.top(btex$a$etex, cuta(aa,bb) aa.c..bb.c); +label.llft(btex$a$etex, self.bb(-20pt,-35pt)); +label.top(btex$b$etex, cuta(bb,dd) bb.c..dd.c); +label.top(btex$b$etex, cuta(dd,ee) dd.c..ee.c); +label.lrt(btex$a$etex, cuta(dd,bb) dd.c..{dir140}bb.c); +label.bot(btex$a$etex, cuta(ee,bb) ee.c..tension1.3 ..{dir115}bb.c); +label.urt(btex$b$etex, cuta(ee,cc) ee.c{(cc.c-ee.c)rotated-15}..cc.c); +endfig; + +end |