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Diffstat (limited to 'Master/texmf-dist/metapost/cmarrows/tgbx0027.mp')
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diff --git a/Master/texmf-dist/metapost/cmarrows/tgbx0027.mp b/Master/texmf-dist/metapost/cmarrows/tgbx0027.mp new file mode 100644 index 00000000000..6e024dc85d5 --- /dev/null +++ b/Master/texmf-dist/metapost/cmarrows/tgbx0027.mp @@ -0,0 +1,216 @@ +%% tgbx0027.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_paren (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 u, designsize, curve, stem, rule_thickness, eps, fine, " & + " fudge, hair;" & + + "u# := " & decimal u# & ";" & + "designsize := " & decimal designsize & ";" & + "curve# := " & decimal curve# & ";" & + "stem# := " & decimal stem# & ";" & + "rule_thickness# := " & decimal rule_thickness# & ";" & + "eps := " & decimal eps & ";" & + "fine# := " & decimal fine# & ";" & + "fudge := " & decimal fudge & ";" & + "hair# := " & decimal hair# & ";" & + + % Time for middle piece + + "save st; numeric st;" & + "if unknown " & cmdname & "_middle_time:" & + " st := arctime (arclength apth)/2 of apth;" & + "else: st:=" & cmdname & "_middle_time; fi") + + save prevpen; + prevpen:=savepen; + + save w; numeric w; w :=12u#; + save h; numeric h; h :=0; + save dh; numeric dh; dh:=0.6designsize; + save dw; numeric dw; dw:=curve#-stem#; + save d; numeric d; d :=1.5dh; + save bold; numeric bold; bold := curve#; + save min_breadth; numeric min_breadth; + min_breadth:=rule_thickness#+0.6dw; + save max_breadth; numeric max_breadth; + max_breadth:=bold+2dw; + save heavy_rule_thickness; numeric heavy_rule_thickness#; + heavy_rule_thickness#:=3rule_thickness#; + + save x,y; + numeric x[],x[]',x[]l,x[]'l,x[]r,x[]'r, + y[],y[]',y[]l,y[]'l,y[]r,y[]'r; + + if fine#>fudge*hair#: + fine# := fudge*hair#; + fi + pickup if fine#=0: nullpen else: pencircle scaled fine# fi; + + penpos3(min_breadth,0); penpos4(max_breadth,0); + rt x3r = w-1.25u#+0.5min_breadth; lft x4l = 1.25u#; + bot y3=-d; y4=h; + + penpos1(min_breadth,0); penpos2(max_breadth,0); + rt x1r = w-1.25u#+0.5min_breadth; lft x2l = 1.25u#; + top y1 = h; y2=-d; + + 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; + + % The bottom part of the parenthesis + + save bottom_part; + vardef bottom_part(expr T) = + filldraw (z3l{3(x4l-x3l),y4-y3}..{up}z4l + --reverse(z3r{3(x4r-x3r),y4-y3}..{up}z4r) + --cycle) transformed T text_; + enddef; + + save f; + vardef f(expr s) = + abs(point 0 of apth - (point s of apth + + (w-2.5u#+0.5min_breadth+0.5*max_breadth) + *(unitvector (direction s of apth) rotated 90))) + < ((h+d) ++ (w-2.5u#+0.5min_breadth+0.5*max_breadth)) + enddef; + + save tolerence; tolerence:=epsilon; + save s; numeric s; + + save T; transform T; % transform the bottom part + if arclength apth=0: + T := identity shifted (point (length apth) of apth - z3r); + elseif arclength apth < y1-y2+y4-y3: + T := mapto(z4l, + 0.5[point 0 of apth, point (length apth) of apth] + + abs(x3r-x4l)*(unitvector (point (length apth) of apth - + point 0 of apth) rotated 90), + z4r, + 0.5[point 0 of apth, point (length apth) of apth] + + abs(x3r-x4r)*(unitvector (point (length apth) of apth - + point 0 of apth) rotated 90), + z3r, + point 0 of apth); + else: + s := solve f(0,length apth); + T := mapto(z4l, + point s of apth + (w-2.5u#+0.5min_breadth+0.5max_breadth) + *(unitvector (direction s of apth) rotated 90), + z4r, + point s of apth + (w-2.5u#+0.5min_breadth-0.5max_breadth) + *(unitvector (direction s of apth) rotated 90), + z3r, + point 0 of apth); + fi; + + bottom_part(T); + + % The top part of the parenthesis + + save top_part; + vardef top_part(expr T) = + filldraw (z1l{3(x2l-x1l),y2-y1}..{down}z2l + --reverse(z1r{3(x2r-x1r),y2-y1}..{down}z2r) + --cycle) transformed T text_; + enddef; + + save g; + vardef g(expr t) = + abs(point (length apth) of apth - (point t of apth + + (w-2.5u#+0.5min_breadth+0.5max_breadth) + *(unitvector (direction s of apth) rotated 90))) + < ((h+d) ++ (w-2.5u#+0.5min_breadth+0.5max_breadth)) + enddef; + + save t; numeric t; + transform T; % transform the top part + if arclength apth = 0: + T := identity shifted (point (length apth) of apth - z1r); + elseif arclength apth < y1-y2+y4-y3: + T := mapto(z2l, + 0.5[point 0 of apth, point (length apth) of apth] + +abs(x1r-x2l)*(unitvector (point (length apth) of apth + - point 0 of apth) rotated 90), + z2r, + 0.5[point 0 of apth, point (length apth) of apth] + +abs(x1r-x2r)*(unitvector (point (length apth) of apth + - point 0 of apth) rotated 90), + z1r, + point (length apth) of apth); + else: + t := solve g(length apth, 0); + T := mapto(z2l, + point t of apth + (w-2.5u#+0.5min_breadth+0.5max_breadth) + *(unitvector (direction t of apth) rotated 90), + z2r, + point t of apth + (w-2.5u#+0.5min_breadth-0.5max_breadth) + *(unitvector (direction t of apth) rotated 90), + z1r, + point (length apth) of apth); + fi; + + top_part(T); + + % The extension part + + save extension_part; + vardef extension_part(expr ss,tt) = + numeric stp; stp:=(ss-tt) div 5pt; + if stp=0: stp:=1; fi + stp:=(ss-tt)/stp; + + pickup pencircle scaled heavy_rule_thickness#; + + if stp>0: + draw for uu=ss step stp until tt-stp: + point uu of apth + (w-2.5u#+.5min_breadth) + *(unitvector (direction uu of apth) rotated 90) + {direction uu of apth} .. + endfor + {direction tt of apth} + point tt of apth + (w-2.5u#+.5min_breadth) + *(unitvector (direction tt of apth) rotated 90) text_; + fi + enddef; + + if arclength apth > y1-y2+y4-y3: + extension_part(s,t); + fi + + pickup prevpen; + + enddef; + +enddef; +
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