diff options
Diffstat (limited to 'Master/texmf-dist/metapost/cmarrows/tgbx0006.mp')
-rw-r--r-- | Master/texmf-dist/metapost/cmarrows/tgbx0006.mp | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/Master/texmf-dist/metapost/cmarrows/tgbx0006.mp b/Master/texmf-dist/metapost/cmarrows/tgbx0006.mp new file mode 100644 index 00000000000..fb135522d85 --- /dev/null +++ b/Master/texmf-dist/metapost/cmarrows/tgbx0006.mp @@ -0,0 +1,179 @@ +%% tgbx0006.mp +%% Copyright 2006 Tommy Ekola <tek@kth.se> +% +% This work may be distributed and/or modified under the conditions of +% the LaTeX Project Public License, either version 1.3 of this license +% or (at your option) any later version. The latest version of this +% license is in http://www.latex-project.org/lppl.txt +% +% This work has the LPPL maintenance status `maintained'. The Current +% Maintainer of this work is Tommy Ekola. The Base Interpreter is +% MetaPost. + +vardef setup_parallelarrows (expr source_file, cmdname) = + + scantokens ("input tgbx0000"); + + scantokens ("input " & source_file); + + expandafter def scantokens cmdname expr p = + scantokens (cmdname & "__tgbxww")(p) + enddef; + + expandafter vardef scantokens (cmdname & "__tgbxww " & "(expr apth) " & + "text text_ = " & + + "save math_spread, x_height, u, rule_thickness, bar, math_axis," & + " asc_height, eps, fudge, crisp, hair;" & + + "math_spread :=" & decimal math_spread & ";" & + "x_height# :=" & decimal x_height# & ";" & + "u# :=" & decimal u# & ";" & + "rule_thickness# :=" & decimal rule_thickness# & ";" & + "bar# :=" & decimal bar# & ";" & + "math_axis# :=" & decimal math_axis# & ";" & + "asc_height# :=" & decimal asc_height# & ";" & + "eps :=" & decimal eps & ";" & + "fudge :=" & decimal fudge & ";" & + "crisp# :=" & decimal crisp# & ";" & + "hair# :=" & decimal hair# & ";") + + save prevpen; + prevpen:=savepen; + + save x,y; + numeric x[], x[]', x[]l, x[]'l, x[]r, x[]'r, + y[], y[]', y[]l, y[]'l, y[]r, y[]'r; + + save spread, w; + numeric spread, w; + + if crisp#>fudge*hair#: + crisp#:=fudge*hair#; + fi + pickup if crisp#=0: nullpen else: pencircle scaled crisp# fi; + + spread = math_spread[.45x_height#, .55x_height#]; + w = 18u#; + + penpos1(rule_thickness#, 90); penpos2(rule_thickness#, 90); + penpos3(bar#, 0); penpos4(bar#, 0); + y0=y1=y2=math_axis#; x1-.5rule_thickness#=u#; rt x0=w-u#; + y3-y0=y0-y4=.24asc_height#+eps; + x3=x4=x0-3u#-eps; + penpos5(bar#, angle(z4-z0)); z5l=z0; + penpos6(bar#, angle(z3-z0)); z6l=z0; + z9=.381966[.5[z3,z4],z0]; + + save pp; path pp; pp = z4l{z9-z4}..z6r; + save t; numeric t; t = xpart(pp intersectiontimes ((0,y2l)--(w,y2l))); + x2=xpart point t of pp; + + save texarrowhead; + vardef texarrowhead(expr T) = + filldraw (z0..{z4-z9}z4r--subpath(0,t) of pp + --z2l--z2r--subpath(t,0) of (z3l{z9-z3}..z5r) + --z3r{z9-z3}..z0 & cycle) transformed T text_; + enddef; + + save mapto, n; + vardef mapto(text t) = + hide(numeric n; n:=0; + numeric x,x_[],y,y_[]; + for z=t: z_[incr n]:=z; endfor; + transform T; + z_2 = z_1 transformed T; + z_4 = z_3 transformed T; + z_6 = z_5 transformed T;) + T + enddef; + + save tt; numeric tt; tt = arctime(arclength apth - (x0-x3l)) of apth; + save ttt; numeric ttt; ttt = arctime(arclength apth - (x0-x2)) of apth; + + save parallelline; + vardef parallelline expr ppp = + save s, stp; + numeric s, stp; stp:=(arclength ppp) div 5pt; + if stp=0: stp:=1; fi + stp:=(arclength ppp)/stp; + + if stp>0: + draw for s=0 step stp until arclength ppp - stp: + point (arctime s of ppp) of ppp + + (.24asc_height#+eps)*(unitvector direction (arctime s of ppp) + of ppp rotated 90) + {direction (arctime s of ppp) of ppp}.. + endfor + {direction (length ppp) of ppp} + point (length ppp) of ppp + + (.24asc_height#+eps)*(unitvector direction (length ppp) + of ppp rotated 90) + withpen pencircle scaled rule_thickness# text_; + + draw for s=0 step stp until arclength ppp - stp: + point (arctime s of ppp) of ppp - + (.24asc_height#+eps)*(unitvector direction (arctime s of ppp) + of ppp rotated 90) + {direction (arctime s of ppp) of ppp}.. + endfor + {direction (length ppp) of ppp} + point (length ppp) of ppp - + (.24asc_height#+eps)*(unitvector direction (length ppp) + of ppp rotated 90) + withpen pencircle scaled rule_thickness# text_; + fi + enddef; + + if arclength apth > x0-x2: parallelline subpath(0,ttt) of apth; fi + + save T; transform T; + if arclength apth = 0: + T:=identity shifted (point (length apth) of apth - z0) + shifted (0,.24asc_height#+eps); + elseif arclength apth < x0-x3l: + T:=identity rotatedaround(z0,angle (direction (length apth) of apth)) + shifted (point (length apth) of apth - z0) + shifted ((.24asc_height#+eps)* + (unitvector (direction (length apth) of apth) rotated 90)); + else: + T:=mapto(z0, + point (length apth) of apth + + (.24asc_height#+eps)* + (unitvector (direction (length apth) of apth) rotated 90), + z2, + point ttt of apth + + (.24asc_height#+eps)* + (unitvector (direction (length apth) of apth) rotated 90), + z3l, + point tt of apth); + fi + texarrowhead(T); + + if arclength apth = 0: + T:=identity shifted (point (length apth) of apth - z0) + shifted (0,-.24asc_height#+eps); + elseif arclength apth < x0-x3l: + T:=identity rotatedaround(z0,angle (direction (length apth) of apth)) + shifted (point (length apth) of apth - z0) + shifted ((.24asc_height#+eps)* + (unitvector (direction (length apth) of apth) rotated -90)); + else: + T:=mapto(z0, + point (length apth) of apth - + (.24asc_height#+eps)* + (unitvector (direction (length apth) of apth) rotated 90), + z2, + point ttt of apth - + (.24asc_height#+eps)* + (unitvector (direction (length apth) of apth) rotated 90), + z4l, + point tt of apth); + fi + texarrowhead(T); + + pickup prevpen; + + enddef; + +enddef;
\ No newline at end of file |