From e0c6872cf40896c7be36b11dcc744620f10adf1d Mon Sep 17 00:00:00 2001 From: Norbert Preining Date: Mon, 2 Sep 2019 13:46:59 +0900 Subject: Initial commit --- macros/latex/contrib/epic/epic.sty | 559 +++++++++++++++++++++++++++++++++++++ 1 file changed, 559 insertions(+) create mode 100644 macros/latex/contrib/epic/epic.sty (limited to 'macros/latex/contrib/epic/epic.sty') diff --git a/macros/latex/contrib/epic/epic.sty b/macros/latex/contrib/epic/epic.sty new file mode 100644 index 0000000000..53f0f253dd --- /dev/null +++ b/macros/latex/contrib/epic/epic.sty @@ -0,0 +1,559 @@ +\typeout{% +Enhancements to Picture Environment. Version 1.2 - Released June 1, 1986} +%---------------------------------------------------------------------- +% Copyright (C) podar@sbcs (Sunil Podar) July 14,1986. +% You may use this file in whatever way you wish. You are requested to +% leave this notice intact, and report any bugs, enhancements, comments, +% suggestions, etc. to: +% USmail: Sunil Podar,Dept. of Computer Science,SUNY at Stony Brook,NY 11794. +% CSNET: podar@sbcs.csnet +% ARPA: podar%suny-sb.csnet@csnet-relay.arpa +% UUCP: {allegra, hocsd, philabs, ogcvax}!sbcs!podar +%---------------------------------------------------------------------- +% This file contains implementation of: +% \multiputlist \matrixput \grid \picsquare +% \dottedline \dashline \drawline \jput +% \putfile +% Environments: dottedjoin, dashjoin and drawjoin +% +% For documentation, see the accompanying manual. +%---------------------------------------------------------------------- +% usage: \multiputlist(x,y)(delta-x,delta-y)[tbrl]{item1,item2,item3,.....} +% \lop and \lopoff taken from TeXbook. +%---------------------------------------------------------------------- +\def\lop#1\to#2{\expandafter\lopoff#1\lopoff#1#2} +\long\def\lopoff,#1,#2\lopoff#3#4{\def#4{#1}\def#3{,#2}} +\def\@@mlistempty{,} +\newif\iflistnonempty +\def\multiputlist(#1,#2)(#3,#4){\@ifnextchar +[{\@imultiputlist(#1,#2)(#3,#4)}{\@imultiputlist(#1,#2)(#3,#4)[]}} + +\long\def\@imultiputlist(#1,#2)(#3,#4)[#5]#6{{% +\@xdim=#1\unitlength \@ydim=#2\unitlength +\listnonemptytrue \def\@@mlist{,#6,} % need this for end condition +\loop +\lop\@@mlist\to\@@firstoflist +\@killglue\raise\@ydim\hbox to\z@{\hskip +\@xdim\@imakepicbox(0,0)[#5]{\@@firstoflist}\hss} +\advance\@xdim #3\unitlength\advance\@ydim #4\unitlength +\ifx\@@mlist\@@mlistempty \listnonemptyfalse\fi +\iflistnonempty +\repeat\relax +\ignorespaces}} +%---------------------------------------------------------------------- +% two-dimensional version of \multiput +% \matrixput(0,0)(20,0){5}(0,20){3}{\circle{2}} +%---------------------------------------------------------------------- +\newcount\@@multicnt +\def\matrixput(#1,#2)(#3,#4)#5(#6,#7)#8#9{% +\ifnum#5>#8\@matrixput(#1,#2)(#3,#4){#5}(#6,#7){#8}{#9}% +\else\@matrixput(#1,#2)(#6,#7){#8}(#3,#4){#5}{#9}\fi} + +%% here #5 >= #8 +\long\def\@matrixput(#1,#2)(#3,#4)#5(#6,#7)#8#9{{\@killglue% +\@multicnt=#5\relax\@@multicnt=#8\relax% +\@xdim=0pt% +\@ydim=0pt% +\setbox\@tempboxa\hbox{\@whilenum \@multicnt > 0\do {% +%%\typeout{\the\@multicnt, \the\@@multicnt}% +\raise\@ydim\hbox to \z@{\hskip\@xdim #9\hss}% +\advance\@multicnt \m@ne% +\advance\@xdim #3\unitlength\advance\@ydim #4\unitlength}}% +\@xdim=#1\unitlength% +\@ydim=#2\unitlength% +\@whilenum \@@multicnt > 0\do {% +\raise\@ydim\hbox to \z@{\hskip\@xdim \copy\@tempboxa\hss}% +\advance\@@multicnt \m@ne% +\advance\@xdim #6\unitlength\advance\@ydim #7\unitlength}% +\ignorespaces}} +%---------------------------------------------------------------------- +%\grid(wd,ht)(delta-wd,delta-ht)[initial-X-integer,initial-Y-integer] +% example: 1. \put(0,0){\grid(95,100)(9.5,10)} +% 2. \put(0,0){\grid(100,100)(10,5)[-10,0]} +% or \put(0,0){\tiny \grid(100,100)(5,5)[0,0]}%numbers in \tiny font +%---------------------------------------------------------------------- +\newcount\d@lta +\newdimen\@delta +\newdimen\@@delta +\newcount\@gridcnt +\def\grid(#1,#2)(#3,#4){\@ifnextchar [{\@igrid(#1,#2)(#3,#4)}% +{\@igrid(#1,#2)(#3,#4)[@,@]}} + +\long\def\@igrid(#1,#2)(#3,#4)[#5,#6]{% +\makebox(#1,#2){% +\@delta=#1pt\@@delta=#3pt\divide\@delta \@@delta\d@lta=\@delta% +\advance\d@lta \@ne\relax\message{grid=\the\d@lta\space x}% +%% copied the definition of \line(0,1){#2} for some efficiency!. +\multiput(0,0)(#3,0){\d@lta}{\hbox to\z@{\hskip -\@halfwidth \vrule + \@width \@wholewidth \@height #2\unitlength \@depth \z@\hss}}% +\ifx#5@\relax\else% +\global\@gridcnt=#5% +\multiput(0,0)(#3,0){\d@lta}{% +\makebox(0,-2)[t]{\number\@gridcnt\global\advance\@gridcnt by #3}}% +\global\@gridcnt=#5% +\multiput(0,#2)(#3,0){\d@lta}{\makebox(0,0)[b]{\number\@gridcnt\vspace{2mm}% +\global\advance\@gridcnt by #3}}% +\fi% +\@delta=#2pt\@@delta=#4pt\divide\@delta \@@delta\d@lta=\@delta% +\advance\d@lta \@ne\relax\message{\the\d@lta . }% +%% copied the definition of \line(1,0){#1} for some efficiency!. +\multiput(0,0)(0,#4){\d@lta}{\vrule \@height \@halfwidth \@depth \@halfwidth + \@width #1\unitlength}% +\ifx#6@\relax\else +\global\@gridcnt=#6% +\multiput(0,0)(0,#4){\d@lta}{% +\makebox(0,0)[r]{\number\@gridcnt\ \global\advance\@gridcnt by #4}}% +\global\@gridcnt=#6% +\multiput(#1,0)(0,#4){\d@lta}{% +\makebox(0,0)[l]{\ \number\@gridcnt\global\advance\@gridcnt by #4}}% +\fi}} +%---------------------------------------------------------------------- +% \picsquare is a centered square of dimensions governed by \thinlines, +% \thicklines or \linethickness declarations. +\def\picsquare{\hskip -0.5\@wholewidth% +\vrule height \@halfwidth depth \@halfwidth width \@wholewidth} +% +% just a square dot with reference point at bottom-left +\def\picsquare@bl{\vrule height \@wholewidth depth \z@ width \@wholewidth} +%---------------------------------------------------------------------- +% \begin{dottedjoin}{interdot-gap in units} +% ..... +% \end{dottedjoin} +% \begin{dashjoin}{dash-length in units}{interdotgap in each dash} +% ..... +% \end{dashjoin} +% \begin{drawjoin} +% ..... +% \end{drawjoin} +% \jput(x,y){character} +% \dottedline[opt. dotcharacter]{dotgap in units}(x1,y1)(x2,y2)...(xN,yN) +% \dashline[#]{dash-length}[opt. dotgap](x1,y1)(x2,y2)...(xN,yN) +% \drawline[#](x1,y1)(x2,y2)...(xN,yN) +%---------------------------------------------------------------------- +% definitions for *join environment. had to do all this mess because of +% optional arguments. +%---------------------------------------------------------------------- +\newif\if@jointhem \global\@jointhemfalse +\newif\if@firstpoint \global\@firstpointtrue +\newcount\@joinkind +%\newenvironment{dottedjoin}[1]%[opt char]{dotgap} +%{\global\@jointhemtrue \gdef\dotgap@join{#1}\global\@joinkind=0\relax}% +%{\global\@jointhemfalse \global\@firstpointtrue} +%---------------------------------------------------------------------- +\def\dottedjoin{\global\@jointhemtrue \global\@joinkind=0\relax + \bgroup\@ifnextchar[{\@idottedjoin}{\@idottedjoin[\picsquare@bl]}} +\def\@idottedjoin[#1]#2{\gdef\dotchar@join{#1}\gdef\dotgap@join{#2}} +\def\enddottedjoin{\global\@jointhemfalse \global\@firstpointtrue\egroup} +%---------------------------------------------------------------------- +\def\dashjoin{\global\@jointhemtrue \global\@joinkind=1\relax + \bgroup\@ifnextchar[{\@idashjoin}{\@idashjoin[\dashlinestretch]}} +\def\@idashjoin[#1]#2{\edef\dashlinestretch{#1}\gdef\dashlen@join{#2}% +\@ifnextchar[{\@iidashjoin}{\gdef\dotgap@join{}}} +\def\@iidashjoin[#1]{\gdef\dotgap@join{#1}} +\let\enddashjoin\enddottedjoin +%---------------------------------------------------------------------- +\def\drawjoin{\global\@jointhemtrue \global\@joinkind=2\relax + \bgroup\@ifnextchar[{\@idrawjoin}{}} +\def\@idrawjoin[#1]{\def\drawlinestretch{#1}} +\let\enddrawjoin\enddottedjoin +%---------------------------------------------------------------------- +%% this is equiv to \put(x,y){#1} when not in {dot*join} environment. +\long\def\jput(#1,#2)#3{{\@killglue\raise#2\unitlength\hbox to \z@{\hskip +#1\unitlength #3\hss}\ignorespaces} +\if@jointhem + \if@firstpoint \gdef\x@one{#1} \gdef\y@one{#2} \global\@firstpointfalse + \else\ifcase\@joinkind + \@dottedline[\dotchar@join]{\dotgap@join\unitlength}% +(\x@one\unitlength,\y@one\unitlength)(#1\unitlength,#2\unitlength) + \or\@dashline[\dashlinestretch]{\dashlen@join}[\dotgap@join]% +(\x@one,\y@one)(#1,#2) + \else\@drawline[\drawlinestretch](\x@one,\y@one)(#1,#2)\fi + \gdef\x@one{#1} \gdef\y@one{#2} + \fi +\fi} +%---------------------------------------------------------------------- +\newdimen\@dotgap +\newdimen\@ddotgap +\newcount\@x@diff +\newcount\@y@diff +\newdimen\x@diff +\newdimen\y@diff +\newbox\@dotbox +\newcount\num@segments +\newcount\num@segmentsi +\newif\ifsqrt@done +%% from sqrtandstuff func basically need \num@segments. +%% given a deltax, deltay and dotgap, it calculates \num@segments = number of +%% segments along the hypotenuse. used by \dottedline & \dashline. +%% It finishes quickly if any of deltax or deltay are zero or close to zero. +\def\sqrtandstuff#1#2#3{ +\ifdim #1 <0pt \@x@diff= -#1 \else\@x@diff=#1\fi +\ifdim #2 <0pt \@y@diff= -#2 \else\@y@diff=#2\fi +%% @diff's will be positive and diff's will retain their sign. +\@dotgap=#3 \divide\@dotgap \tw@ +\advance\@x@diff \@dotgap \advance\@y@diff \@dotgap% for round-off errors +\@dotgap=#3 +\divide\@x@diff \@dotgap \divide\@y@diff \@dotgap +\sqrt@donefalse +\ifnum\@x@diff < 2 + \ifnum\@y@diff < 2 \num@segments=\@x@diff \advance\num@segments \@y@diff + \sqrt@donetrue + \else\num@segments=\@y@diff \sqrt@donetrue\fi + \else\ifnum\@y@diff < 2 \num@segments=\@x@diff \sqrt@donetrue\fi +\fi +\ifsqrt@done \ifnum\num@segments=\z@ \num@segments=\@ne\fi\relax + \else \ifnum\@y@diff >\@x@diff + \@tempcnta=\@x@diff \@x@diff=\@y@diff \@y@diff=\@tempcnta + \fi %exchange @x@diff & @y@diff, so now @x@diff > @y@diff + \num@segments=\@y@diff + \multiply\num@segments \num@segments + \multiply\num@segments by 457 + \divide\num@segments \@x@diff + \advance\num@segments by 750 % for round-off, going to divide by 1000. + \divide\num@segments \@m + \advance\num@segments \@x@diff + %num@segments = @x@diff + (0.457*sqr(@y@diff)/@x@diff) +\fi} +%---------------------------------------------------------------------- +% \dottedline[opt. char]{interdot gap in units}(x1,y1)(x2,y2)....(xN,yN) +%---------------------------------------------------------------------- +%% Used the following construction earlier but that results in box memory +%% full much too soon although it works perfectly. +%% \setbox\@dotbox\vbox to\z@{\vss \hbox to\z@{\hss #1\hss}\vss}\relax} +%% The cenetering of characters is achieved by substracting half the ht, wd +%% of character from the (x,y) coordinates where they are to be put. We +%% chose to use a macro for the ``dot'' instead of \copy\box to save memory +%% at the expense of extra cpu, since memory becomes an issue very soon. +%% \picsquare is already centered, whereas other characters, except \circle, +%% will not be cenetered, hence to handle them all in a similar fashion, +%% used \picsquare@bl. +% +% kind of tail recursion. +\def\dottedline{\@ifnextchar [{\@idottedline}{\@idottedline[\picsquare@bl]}} +\def\@idottedline[#1]#2(#3,#4){\@ifnextchar (% +{\@iidottedline[#1]{#2}(#3,#4)}{\relax}} +\def\@iidottedline[#1]#2(#3,#4)(#5,#6){\@dottedline[#1]{#2\unitlength}% +(#3\unitlength,#4\unitlength)(#5\unitlength,#6\unitlength)% +\@idottedline[#1]{#2}(#5,#6)} +% +%% user not supposed to use this directly. arguments in absolute dimensions. +%% need to pass absolute dimens here because dashline calls dottedline and +%% can supply only absolute dimensions. +\long\def\@dottedline[#1]#2(#3,#4)(#5,#6){{% +\x@diff=#5\relax\advance\x@diff by -#3\relax +\y@diff=#6\relax\advance\y@diff by -#4\relax +\sqrtandstuff{\x@diff}{\y@diff}{#2} +\divide\x@diff \num@segments +\divide\y@diff \num@segments +\advance\num@segments \@ne % to put the last point at destination. +%%\typeout{num@segments= \the\num@segments} +\setbox\@dotbox\hbox{#1}% just to get the dimensions of the character. +\@xdim=#3 \@ydim=#4 +\ifdim\ht\@dotbox >\z@% otherwise its a circle. + \advance\@xdim -0.5\wd\@dotbox + \advance\@ydim -0.5\ht\@dotbox + \advance\@ydim .5\dp\@dotbox\fi +%%circle's have a ht=0, this is one way I could think of to catch circles. +%%following loop is equiv to +%%\multiput(\@xdim,\@ydim)(\x@diff,\y@diff){\num@segments}{#1} +%%with arguments in absolute dimensions. +\@killglue +\loop \ifnum\num@segments > 0 +\unskip\raise\@ydim\hbox to\z@{\hskip\@xdim #1\hss}% +\advance\num@segments \m@ne\advance\@xdim\x@diff\advance\@ydim\y@diff% +\repeat +\ignorespaces}} +%---------------------------------------------------------------------- +% \dashline[#]{dash-length}[optional dotgap](x1,y1)(x2,y2)...(xN,yN) +% The minimum # of dashes put is 2, one at either end point; dash-length is +% reduced accordingly if necessary. Also have to some dirty work to account +% for stretch & shrink. +% \renewcommand{\dashlinestretch}{-50} %ONLY INTEGERS PERMITTED. +%---------------------------------------------------------------------- +\def\dashlinestretch{0} %well, could have used a counter. +\def\dashline{\@ifnextchar [{\@idashline}{\@idashline[\dashlinestretch]}} +\def\@idashline[#1]#2{\@ifnextchar [{\@iidashline[#1]{#2}}% +{\@iidashline[#1]{#2}[\@empty]}} %\@empty needed-- later checked with \ifx +\def\@iidashline[#1]#2[#3](#4,#5){\@ifnextchar (% +{\@iiidashline[#1]{#2}[#3](#4,#5)}{\relax}} +% +\def\@iiidashline[#1]#2[#3](#4,#5)(#6,#7){% +\@dashline[#1]{#2}[#3](#4,#5)(#6,#7)% +\@iidashline[#1]{#2}[#3](#6,#7)} +% +\long\def\@dashline[#1]#2[#3](#4,#5)(#6,#7){{% +\x@diff=#6\unitlength \advance\x@diff by -#4\unitlength +\y@diff=#7\unitlength \advance\y@diff by -#5\unitlength +%% correction to get actual width since the dash-length as taken in arguement +%% is the center-to-center of the end-points. +\@tempdima=#2\unitlength \advance\@tempdima -\@wholewidth +\sqrtandstuff{\x@diff}{\y@diff}{\@tempdima} +\ifnum\num@segments <3 \num@segments=3\fi% min number of dashes I can plot +% is 2, 1 at either end, thus min num@segments is 3 (including 'empty dash'). +\@tempdima=\x@diff \@tempdimb=\y@diff +\divide\@tempdimb by\num@segments +\divide\@tempdima by\num@segments +%% ugly if-then-else. If optional dotgap specified, then use it otherwise +%% make a solid looking dash. +{\ifx#3\@empty \relax + \ifdim\@tempdima < 0pt \x@diff=-\@tempdima\else\x@diff=\@tempdima\fi + \ifdim\@tempdimb < 0pt \y@diff=-\@tempdimb\else\y@diff=\@tempdimb\fi + \ifdim\x@diff < 0.3pt %it's a vertical dashline + \ifdim\@tempdimb > 0pt + \global\setbox\@dotbox\hbox{\hskip -\@halfwidth \vrule + \@width \@wholewidth \@height \@tempdimb} + \else\global\setbox\@dotbox\hbox{\hskip -\@halfwidth \vrule + \@width \@wholewidth \@height\z@ \@depth -\@tempdimb}\fi + \else\ifdim\y@diff < 0.3pt %it's a horizontal dashline + \ifdim\@tempdima >0pt + \global\setbox\@dotbox\hbox{\vrule \@height \@halfwidth + \@depth \@halfwidth \@width \@tempdima} + \else\global\setbox\@dotbox\hbox{\hskip \@tempdima + \vrule \@height \@halfwidth \@depth \@halfwidth + \@width -\@tempdima \hskip \@tempdima}\fi + \else\global\setbox\@dotbox\hbox{% +\@dottedline[\picsquare]{0.98\@wholewidth}(0pt,0pt)(\@tempdima,\@tempdimb)} +\fi\fi +\else\global\setbox\@dotbox\hbox{% +\@dottedline[\picsquare]{#3\unitlength}(0pt,0pt)(\@tempdima,\@tempdimb)} +\fi} +\advance\x@diff by -\@tempdima % both have same sign +\advance\y@diff by -\@tempdimb +% +%%here we correct the number of dashes to be put by reducing them +%%appropriately. (num@segments*\@wholewidth) is in some way the slack we +%%have,and division by dash-length gives the reduction. reduction = +%%(2*num@segments*\@wholewidth)/dash-length +%% (num@segments includes empty ones) +\@tempdima=\num@segments\@wholewidth \@tempdima=2\@tempdima +\@tempcnta=\@tempdima \@tempdima=#2\unitlength \@tempdimb=0.5\@tempdima +\@tempcntb=\@tempdimb \advance\@tempcnta by \@tempcntb % round-off error +\divide\@tempcnta by\@tempdima \advance\num@segments by -\@tempcnta +% +\ifnum #1=0 \relax\else\ifnum #1 < -100 + \typeout{***dashline: reduction > -100 percent implies blankness!***} +\else\num@segmentsi=#1 \advance\num@segmentsi by 100 + \multiply\num@segments by\num@segmentsi \divide\num@segments by 100 +\fi\fi +% +\divide\num@segments by 2 % earlier num@segments included 'empty dashes' too. +\ifnum\num@segments >0 % if =0 then don't divide => \x@diff & \y@diff + \divide\x@diff by\num@segments% remain same. + \divide\y@diff by\num@segments + \advance\num@segments by\@ne %for the last segment for which I subtracted + %\@tempdima & \@tempdimb from \x@diff & \y@diff + \else\num@segments=2 % one at each end. +\fi +%%\typeout{num@segments finally = \the\num@segments} +%% equiv to \multiput(#4,#5)(\x@diff,\y@diff){\num@segments}{\copy\@dotbox} +%% with arguements in absolute dimensions. +\@xdim=#4\unitlength \@ydim=#5\unitlength +\@killglue +\loop \ifnum\num@segments > 0 +\unskip\raise\@ydim\hbox to\z@{\hskip\@xdim \copy\@dotbox\hss}% +\advance\num@segments \m@ne\advance\@xdim\x@diff\advance\@ydim\y@diff% +\repeat +\ignorespaces}} +%---------------------------------------------------------------------- +%%1.00 .833333 .80 .75 .66666 .60 .50 .40 .33333 .25 .20 .16666 +%% .916666 .816666 .775 .708333 .633333 .55 .45 .366666 .291666 .225 .183333 +%% 0.0 +%%0.083333 +%% the first line has absolute slopes corresponding to various permissible +%% integer combinations representing slopes. The second line is the midpoint +%% of all those slopes (attempted to show them in the middle of two entries). +%% +%% \lineslope(x@diff dimen, y@diff dimen) +%% Given base (x@diff) and height (y@diff) in dimensions, determines the +%% closest available slope and returns the two required integers in \@xarg +%% and \@yarg. The given base and height can be ANYTHING, -ve or +ve, or +%% even 0pt. \lineslope knows about (0,1) and (1,0) slopes too and returns +%% correct values if the conditions regarding x@diff & y@diff are obeyed +%% (see NOTE). Used by \drawline. This is the simplest and only way I could +%% figure out to accomplish it!. +%% NOTE: both the dimensions (x@diff & y@diff) must be in SAME units and the +%% larger of the two dimensions must be atleast 1pt (i.e. 65536sp). To avoid +%% dividing by 0, I make the larger dimension = 1pt if it is < 1pt. +%% will need a similar one for vectors, or maybe this can be used. For +%% vectors the range is -4, 4 unlike lines where it is -6, 6. +\newif\if@flippedargs +\def\lineslope(#1,#2){% +\ifdim #1 <0pt \@xdim= -#1 \else\@xdim=#1\fi +\ifdim #2 <0pt \@ydim= -#2 \else\@ydim=#2\fi +%%\typeout{xdim,ydim= \the\@xdim, \the\@ydim} +\ifdim\@xdim >\@ydim \@tempdima=\@xdim \@xdim=\@ydim \@ydim=\@tempdima +\@flippedargstrue\else\@flippedargsfalse\fi% x < y +\ifdim\@ydim >1pt \@tempcnta=\@ydim + \divide\@tempcnta by 65536% now \@tempcnta=integral part of #1. + \divide\@xdim \@tempcnta\fi +\ifdim\@xdim <.083333pt \@xarg=1 \@yarg=0 + \else\ifdim\@xdim <.183333pt \@xarg=6 \@yarg=1 + \else\ifdim\@xdim <.225pt \@xarg=5 \@yarg=1 + \else\ifdim\@xdim <.291666pt \@xarg=4 \@yarg=1 + \else\ifdim\@xdim <.366666pt \@xarg=3 \@yarg=1 + \else\ifdim\@xdim <.45pt \@xarg=5 \@yarg=2 + \else\ifdim\@xdim <.55pt \@xarg=2 \@yarg=1 + \else\ifdim\@xdim <.633333pt \@xarg=5 \@yarg=3 + \else\ifdim\@xdim <.708333pt \@xarg=3 \@yarg=2 + \else\ifdim\@xdim <.775pt \@xarg=4 \@yarg=3 + \else\ifdim\@xdim <.816666pt \@xarg=5 \@yarg=4 + \else\ifdim\@xdim <.916666pt \@xarg=6 \@yarg=5 + \else \@xarg=1 \@yarg=1% +\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi +\if@flippedargs\relax\else\@tempcnta=\@xarg \@xarg=\@yarg + \@yarg=\@tempcnta\fi +\ifdim #1 <0pt \@xarg= -\@xarg\fi +\ifdim #2 <0pt \@yarg= -\@yarg\fi +%%\typeout{closest slope integers = \the\@xarg, \the\@yarg} +} +%---------------------------------------------------------------------- +% usage: \drawline[#](x1,y1)(x2,y2)....(xN,yN) +% % # is an optional integer between -100 & infinity. +% \renewcommand{\drawlinestretch}{-50} %ONLY INTEGERS PERMITTED. +%---------------------------------------------------------------------- +\newif\if@toosmall +\newif\if@drawit +\newif\if@horvline +\def\drawlinestretch{0} %well, could have used a counter. +% kind of tail recursion. +\def\drawline{\@ifnextchar [{\@idrawline}{\@idrawline[\drawlinestretch]}} +\def\@idrawline[#1](#2,#3){\@ifnextchar ({\@iidrawline[#1](#2,#3)}{\relax}} +\def\@iidrawline[#1](#2,#3)(#4,#5){\@drawline[#1](#2,#3)(#4,#5)% +\@idrawline[#1](#4,#5)} +% +\def\@drawline[#1](#2,#3)(#4,#5){{% +\x@diff=#4\unitlength \advance\x@diff by -#2\unitlength +\y@diff=#5\unitlength \advance\y@diff by -#3\unitlength +%% override any linethickness declarations, and since horiz & vertical lines +%% come out thinner than the slanted ones, assign slightly larger values. +%% default values are: thinlines=0.4pt, thicklines=0.8pt +\ifx\@linefnt\tenln \linethickness{0.5pt} \else \linethickness{0.9pt}\fi +\lineslope(\x@diff,\y@diff)% returns the two integers in \@xarg & \@yarg. +%------ +\@toosmalltrue +{\ifdim\x@diff <\z@ \x@diff=-\x@diff\fi + \ifdim\y@diff <\z@ \y@diff=-\y@diff\fi + \ifdim\x@diff >10pt \global\@toosmallfalse\fi + \ifdim\y@diff >10pt \global\@toosmallfalse\fi} +%------ +%% For efficiency, if the line is horiz or vertical then we draw it in one +%% shot, only if the stretch is not -ve and the line is not too small. +\@drawitfalse\@horvlinefalse +\ifnum#1 <0 \relax\else\@horvlinetrue\fi +\if@toosmall\@horvlinetrue\fi% to get 'or' condition. We necessarily draw a +% solid line if the line is too small ignoring any -ve stretch. +\if@horvline + \ifdim\x@diff =0pt \put(#2,#3){\ifdim\y@diff >0pt \@linelen=\y@diff \@upline + \else\@linelen=-\y@diff \@downline\fi}% + \else\ifdim\y@diff =0pt + \ifdim\x@diff >0pt \put(#2,#3){\vrule \@height \@halfwidth \@depth + \@halfwidth \@width \x@diff} + \else \put(#4,#5){\vrule \@height \@halfwidth \@depth + \@halfwidth \@width -\x@diff}\fi + \else\@drawittrue\fi\fi % construct the line explicitly +\else\@drawittrue\fi +%------------------------------- +\if@drawit +\ifnum\@xarg< 0 \@negargtrue\else\@negargfalse\fi +\ifnum\@xarg =0 \setbox\@linechar% +\hbox{\hskip -\@halfwidth \vrule \@width \@wholewidth \@height 10.2pt + \@depth \z@} +\else \ifnum\@yarg =0 \setbox\@linechar% +\hbox{\vrule \@height \@halfwidth \@depth \@halfwidth \@width 10.2pt} +\else \if@negarg \@xarg -\@xarg \@yyarg -\@yarg + \else \@yyarg \@yarg\fi +\ifnum\@yyarg >0 \@tempcnta\@yyarg \else \@tempcnta -\@yyarg\fi +\setbox\@linechar\hbox{\@linefnt\@getlinechar(\@xarg,\@yyarg)}% +\fi\fi +%------ +\if@toosmall% => it isn't a horiz or vert line and is toosmall. + \@dottedline[\picsquare]{.98\@wholewidth}% +(#2\unitlength,#3\unitlength)(#4\unitlength,#5\unitlength)% +\else +%% following is neat. The last segment takes \wd\@linechar & \ht\@linechar +%% so plot the line as though it were from (#2,#3) to +%% (#4-\wd\@linechar,#5-\ht\@linechar) (i.e. for positive slope; of course, +%% signs are reversed for other slopes). For horizontal & vertical dashes we +%% don't have to subtract the ht & wd resp. since they are already centered. +\ifnum\@xarg=0\relax\else\ifdim\x@diff >\z@ \advance\x@diff -\wd\@linechar + \else\advance\x@diff \wd\@linechar\fi\fi +\ifnum\@yarg=0\relax\else\ifdim\y@diff >\z@\advance\y@diff -\ht\@linechar + \else\advance\y@diff \ht\@linechar\fi\fi +\ifdim\x@diff <\z@ \@x@diff=-\x@diff \else\@x@diff=\x@diff\fi +\ifdim\y@diff <\z@ \@y@diff=-\y@diff \else\@y@diff=\y@diff\fi +%%\typeout{x@diff,y@diff=\the\x@diff , \the\y@diff} +\num@segments=0 \num@segmentsi=0 +\ifdim\wd\@linechar >1pt + \num@segmentsi=\@x@diff \divide\num@segmentsi \wd\@linechar\fi +\ifdim\ht\@linechar >1pt + \num@segments=\@y@diff \divide\num@segments \ht\@linechar\fi +\ifnum\num@segmentsi >\num@segments \num@segments=\num@segmentsi\fi +\advance\num@segments \@ne %to account for round-off error +% +\ifnum #1=0 \relax \else\ifnum #1 < -99 + \typeout{***drawline: reduction <= -100 percent implies blankness!***} +\else\num@segmentsi=#1 \advance\num@segmentsi by 100 + \multiply\num@segments \num@segmentsi + \divide\num@segments by 100 + \ifnum \num@segments=0 \num@segments=1 \fi +\fi\fi +%%\typeout{num@segments after = \the\num@segments} +% +\divide\x@diff \num@segments +\divide\y@diff \num@segments +\advance\num@segments \@ne %for the last segment for which I subtracted + %\wd & \ht of \@linechar from \@x@diff & \@y@diff. +%%\typeout{numseg,x@diff,y@diff= \the\num@segments, \the\x@diff, \the\y@diff} +% +\@xdim=#2\unitlength \@ydim=#3\unitlength +\if@negarg \advance\@xdim -\wd\@linechar\fi +\ifnum\@yarg <0 \advance\@ydim -\ht\@linechar\fi +%%following loop equiv to \multiput@abs(\@xdim,\@ydim)% +%%(\x@diff,\y@diff){\num@segments}{\copy\@linechar} +%%with arguements in absolute dimensions. +\@killglue +\loop \ifnum\num@segments > 0 +\unskip\raise\@ydim\hbox to\z@{\hskip\@xdim \copy\@linechar\hss}% +\advance\num@segments \m@ne\advance\@xdim\x@diff\advance\@ydim\y@diff% +\repeat +\ignorespaces +\fi%the if of @toosmall +\fi}}% for \if@drawit +%---------------------------------------------------------------------- +%usage: \putfile{datafile}{OBJECT} +% The OBJECT is plotted at EACH of the coordinates read from the datafile. +% The idea of these macros is to generate (x,y) pairs using some program +% and then directly use those coordinates. Since TeX doesn't have real +% floating point calculations, it is much more efficient and accurate to do +% things this way. One can also use the unix facility 'spline' now to +% generate smooth curves with equidistant ``dots''. +% NOTE: the external file of coordinates must have x y pairs with a space +% between them. Also it is suggested that some extension such as '.put' +% be used for such datafiles to distinguish them in which case it must +% be explicitely specified in the 1st argument so that TeX doesn't look +% for a .tex extension. +% The % char remains valid as a comment char and such lines are ignored; +% however, there should be atleast one space after the second entry if a +% comment is on the same line as data since % eats up the newline. +%----------------------------------------------------------------------- +\long\def\splittwoargs#1 #2 {(#1,#2)} +% +\newif\if@stillmore +\newread\@datafile +\long\def\putfile#1#2{\openin\@datafile = #1 +\@stillmoretrue +\loop +\ifeof\@datafile\relax\else\read\@datafile to\@dataline\fi +%if file nonexistent, do nothing. +\ifeof\@datafile\@stillmorefalse +\else\ifx\@dataline\@empty \relax + \else +\expandafter\expandafter\expandafter\put\expandafter\splittwoargs% +\@dataline{#2} + \fi +\fi +\if@stillmore +\repeat +\closein\@datafile +} +%---------------------------------------------------------------------- -- cgit v1.2.3