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Diffstat (limited to 'Master/texmf-dist/tex/plain/base/picmac.tex')
-rw-r--r-- | Master/texmf-dist/tex/plain/base/picmac.tex | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/Master/texmf-dist/tex/plain/base/picmac.tex b/Master/texmf-dist/tex/plain/base/picmac.tex new file mode 100644 index 00000000000..0e1b537ab8b --- /dev/null +++ b/Master/texmf-dist/tex/plain/base/picmac.tex @@ -0,0 +1,178 @@ +% Pictures (a subset of \LaTeX's conventions, plus squines) +\catcode`@=11 % enable private control sequences +\def\wlog#1{} % don't put allocation info into the log + +\newskip\hsssglue \hsssglue=0pt plus 1fill minus 1fill \def\hsss{\hskip\hsssglue} + +\newdimen\unitlength \newdimen\linethickness +\newdimen\@picheight \newdimen\@xdim \newdimen\@ydim \newdimen\@len \newdimen\@save +\newcount\@multicount \newcount\@xarg \newcount\@yarg +\newbox\@picbox \newbox\@mpbox + +\font\tenln=line10 \font\tenlnw=linew10 +\font\tencirc=lcircle10 \font\tencircw=lcirclew10 + +\def\thinlines{\let\linefont=\tenln \let\circlefont=\tencirc + \linethickness=\fontdimen8\linefont} +\def\thicklines{\let\linefont=\tenlnw \let\circlefont=\tencircw + \linethickness=\fontdimen8\linefont} +\thinlines + +\def\beginpicture(#1,#2)(#3,#4){\@picheight=#2\unitlength + \setbox\@picbox=\hbox to#1\unitlength\bgroup \let\line=\@line + \kern-#3\unitlength \lower#4\unitlength\hbox\bgroup\ignorespaces} +\def\endpicture{\egroup\hss\egroup + \ht\@picbox=\@picheight \dp\@picbox=\z@ + \leavevmode\box\@picbox} + +\def\put(#1,#2)#3{\raise#2\unitlength\rlap{\kern#1\unitlength #3}\ignorespaces} + +\def\multiput(#1,#2)(#3,#4)#5#6{\@multicount=#5\relax + \@xdim=#1\unitlength \@ydim=#2\unitlength \setbox\@mpbox=\hbox{#6}% + \loop\ifnum\@multicount>0 + \raise\@ydim\rlap{\kern\@xdim \unhcopy\@mpbox}% + \advance\@xdim#3\unitlength \advance\@ydim#4\unitlength + \advance\@multicount\m@ne \repeat\ignorespaces} + +\def\makebox(#1,#2)#3{\setbox\@picbox=\hbox to#1\unitlength{\hss#3\hss}% + \@ydim=\ht\@picbox \advance\@ydim-\dp\@picbox + \ht\@picbox=#2\unitlength \dp\@picbox=\z@ + \leavevmode\lower.5\@ydim\box\@picbox} + +\newif\ifneg +\def\@line(#1,#2)#3{\@xarg=#1 \@yarg=#2 \@len=#3\unitlength \leavevmode + \ifnum\@xarg<0 \reverseline \else \negfalse \@ydim=\z@\fi + \ifnum\@xarg=0 \@vline + \else\ifnum\@yarg=0 \@hline \else\@sline\fi\fi + \ifneg\kern-\@len\else\@save=\@ydim\fi} +\def\reverseline{\negtrue \kern-\@len \@xarg=-\@xarg + \@ydim=\@len \multiply\@ydim\@yarg \divide\@ydim\@xarg \@yarg=-\@yarg} + +\def\@hline{\vrule height.5\linethickness depth.5\linethickness width\@len} +\def\@vline{\kern-.5\linethickness\vrule width\linethickness + \ifnum\@yarg<0 height\z@ depth\else depth\z@ height\fi\@len + \kern-.5\linethickness} + +\def\@sline{\setbox\@picbox=\hbox{\linefont \count@=\@xarg \multiply\count@ 8 + \ifnum\@yarg>0 \advance\count@\@yarg \advance\count@-9 + \else \advance\count@-\@yarg \advance\count@ 55 \fi \char\count@}% + \ifnum\@yarg<0 \@picheight=-\ht\@picbox \advance\@ydim\@picheight + \else \@picheight=\ht\@picbox \fi + \@xdim=\wd\@picbox \@save=\@ydim + \loop\ifdim\@xdim<\@len \raise\@ydim\copy\@picbox + \advance\@xdim\wd\@picbox \advance\@ydim\@picheight \repeat + \advance\@xdim-\@len \kern-\@xdim + \multiply\@xdim\@yarg \divide\@xdim\@xarg \advance\@ydim-\@xdim + \raise\@ydim\box\@picbox} + +\def\vector(#1,#2)#3{\@line(#1,#2){#3}% + \ifnum\@xarg=0 \@vvector \else\ifnum\@yarg=0 \@hvector \else\@svector\fi\fi} +\def\@hvector{\ifneg\rlap{\linefont\char27}\else + \smash{\llap{\linefont\char45}}\fi} % we have to smash because of font bug +\def\@vvector{\ifnum\@yarg<0 \raise-\@len\rlap{\linefont\char63}% + \else\setbox\@picbox=\rlap{\linefont\char54}\advance\@len-\ht\@picbox + \raise\@len\box\@picbox\fi} + +\def\@svector{\setbox\@picbox=\hbox to\z@{\linefont + \ifnum\@yarg<0 \count@=55 \@yarg=-\@yarg \else\count@=-9 \fi + \ifneg\multiply\@xarg16 \multiply\@yarg2 + \else\hss % \llap + \ifnum\@xarg>2 \multiply\@xarg9 \multiply\@yarg2 \advance\count@29 + \else\ifnum\@yarg>2 \multiply\@xarg16 \multiply\@yarg9 \advance\count@-20 + \else\multiply\@xarg24 \multiply\@yarg3 \fi\fi\fi + \advance\count@\@xarg \advance\count@\@yarg \char\count@ + \ifneg\hss\fi}% \rlap + \raise\@save\box\@picbox} + +\def\disk#1{\@len=#1\unitlength \count@='160 \@diskcirc} +\def\circle#1{\@len=#1\unitlength \count@='140 \@diskcirc} +\def\@diskcirc{\setbox\@picbox=\hbox{\circlefont\char\count@}\@xdim=\wd\@picbox + \leavevmode \ifdim\@len>15.499\@xdim \@bigdc \else \@smalldc\fi} +\def\@bigdc{\ifnum\count@<'160 \@bigcirc + \else \@len=15\@xdim \@diskcirc\fi} +\def\@smalldc{{\advance\@len-.5\@xdim + \loop\ifdim\@xdim<\@len \advance\count@\@ne \advance\@xdim\wd\@picbox\repeat + \hbox{\circlefont\char\count@}}} +\def\@bigcirc{{\circlefont\count@=15 + \setbox\@picbox=\hbox{\char\count@}\@xdim=\wd\@picbox + \ifdim\@len>2.5\@xdim \@len=2.5\@xdim\fi + \advance\@len-.125\wd\@picbox + \loop\ifdim\@xdim<\@len \advance\count@ 4 \advance\@xdim.25\wd\@picbox\repeat + \@ydim=.5\@xdim \advance\@ydim.5\linethickness + \setbox\@picbox=\vbox{\hbox{\char\count@\advance\count@-3\char\count@}% + \nointerlineskip + \hbox{\advance\count@\m@ne\char\count@\advance\count@\m@ne\char\count@}}% + \kern-\@ydim\lower\@ydim\box\@picbox}} + +\newif\ifovaltl \newif\ifovaltr \newif\ifovalbl \newif\ifovalbr +\ovaltltrue \ovaltrtrue \ovalbltrue \ovalbrtrue +\def\oval(#1,#2){\@xdim=#1\unitlength \@ydim=#2\unitlength + {\circlefont \setbox\@picbox=\hbox{\char0} + \ifdim\@xdim<\wd\@picbox \@xdim=\wd\@picbox\fi + \ifdim\@ydim<\wd\@picbox \@ydim=\wd\@picbox\fi + \@save=\@xdim \ifdim\@ydim<\@save \@save=\@ydim \fi + \count@=39 + \loop \setbox\@picbox=\hbox{\char\count@}\ifdim\@save<\wd\@picbox + \advance\count@-4 \repeat + \setbox\strutbox=\hbox{\vrule height\ht\@picbox depth\dp\@picbox width\z@ + \kern\wd\@picbox}% + \@save=.5\wd\@picbox \advance\@save-.5\linethickness + \setbox0=\hbox to\@xdim{\ifovaltl\char\count@\else\strut\fi + \kern-\@save\leaders\hrule height\ifovaltl\linethickness\else\z@\fi\hfil + \leaders\hrule height\ifovaltr\linethickness\else\z@\fi\hfil\kern\@save + \ifovaltr\advance\count@-3\char\count@\else\strut\fi\kern-\wd\@picbox}% + \advance\count@\m@ne + \setbox2=\hbox to\@xdim{\ifovalbl\char\count@\else\strut\fi + \kern-\@save\leaders\hrule height\ifovalbl\linethickness\else\z@\fi\hfil + \leaders\hrule height\ifovalbr\linethickness\else\z@\fi\hfil\kern\@save + \ifovalbr\advance\count@\m@ne\char\count@\else\strut\fi\kern-\wd\@picbox}% + \@save=\@ydim \advance\@save-\wd\@picbox \divide\@save 2 + \setbox\@picbox=\vbox{\box0\nointerlineskip + \hbox to\@xdim{\vrule height\@save width\ifovaltl\linethickness\else\z@\fi + \hfil\ifovaltr\vrule width\linethickness\kern-\linethickness\fi}% + \nointerlineskip + \hbox to\@xdim{\vrule height\@save width\ifovalbl\linethickness\else\z@\fi + \hfil\ifovalbr\vrule width\linethickness\kern-\linethickness\fi}% + \nointerlineskip\box2}% + \@save=.5\@ydim \advance\@save.5\linethickness \leavevmode + \kern-.5\@xdim \kern-.5\linethickness \lower\@save\box\@picbox}} + +\def\cpic#1\endcpic{\vcenter{\hbox{\beginpicture#1\endpicture}}} + +% Squines (quadratic splines) +% example of use: to plot f(x) between x0 and x1, you can say +% \put(0,0){\squine(x0,xm,x1,y0,ym,y1)}, where y0=f(x0), y1=f(x1) +% xm=(y0-y1+s1x1-s0x0)/(s1-s0), ym=(s0(s1x1-y1)-s1(s0x0-y0))/(s1-s0), +% s0=f'(x0), and s1=f'(x1). + +\newdimen\@xi \newdimen\@xii \newdimen\@xiii \newdimen\@xiv +\newdimen\@xpt \newdimen\@xoldpt +\newdimen\@yi \newdimen\@yii \newdimen\@yiii \newdimen\@yiv +\newdimen\@ypt \newdimen\@yoldpt +\def\squine(#1,#2,#3,#4,#5,#6){\setbox\@picbox\hbox{\tencirc q}% + \global\@xoldpt=#1\unitlength \global\@yoldpt=#4\unitlength \kern\@xoldpt + \@xi=\@xoldpt \@xii=#2\unitlength \@xiii=#3\unitlength + \@yi=\@yoldpt \@yii=#5\unitlength \@yiii=#6\unitlength + \squinerec + \@xpt=#3\unitlength \@ypt=#6\unitlength \@addpoint + \raise\@ypt\copy\@picbox} +\newif\iffar +\def\squinerec{\farfalse \testnear\@xi\@xiii \testnear\@yi\@yiii + \iffar \decast \fi} +\def\testnear#1#2{\@save=#1\advance\@save-#2% + \ifdim\@save<\z@ \@save=-\@save\fi \ifdim\@save>\p@ \fartrue \fi} +\def\decast{\@xpt=\@xi \advance\@xpt\@xii \divide\@xpt2 + \advance\@xii\@xiii \divide\@xii2 + \@xiv=\@xpt \advance\@xiv\@xii \divide\@xiv2 + \@ypt=\@yi \advance\@ypt\@yii \divide\@ypt2 + \advance\@yii\@yiii \divide\@yii2 + \@yiv=\@ypt \advance\@yiv\@yii \divide\@yiv2 + \begingroup\@xii=\@xpt \@xiii=\@xiv + \@yii=\@ypt \@yiii=\@yiv \squinerec\endgroup + \@xpt=\@xiv \@ypt=\@yiv \@addpoint + \@xi=\@xiv \@yi=\@yiv \squinerec} +\def\@addpoint{%\message{(\the\@xpt,\the\@ypt)}% + \global\advance\@xoldpt-\@xpt \wd\@picbox=-\@xoldpt + \raise\@yoldpt\copy\@picbox \global\@xoldpt=\@xpt \global\@yoldpt=\@ypt} + +\catcode`\@=12 % disable private control sequences |