diff options
Diffstat (limited to 'src/cmd/tpic/tex.c')
| -rw-r--r-- | src/cmd/tpic/tex.c | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/src/cmd/tpic/tex.c b/src/cmd/tpic/tex.c new file mode 100644 index 00000000..ade5df6b --- /dev/null +++ b/src/cmd/tpic/tex.c @@ -0,0 +1,203 @@ +#include <math.h> +#include <stdio.h> +#include "tex.h" + +void +devarc(double x1, double y1, double x2, double y2, double xc, double yc, int r) +{ + double t, start, stop; + int rad; + + /* tpic arcs go clockwise, and angles are measured clockwise */ + start = atan2(y2-yc, x2-xc); + stop = atan2(y1-yc, x1-xc); + if (r<0) { + t = start; start = stop; stop = t; + } + rad = SCX(sqrt((x1-xc)*(x1-xc)+(y1-yc)*(y1-yc))); + fprintf(TEXFILE, " \\special{ar %d %d %d %d %6.3f %6.3f}%%\n", + TRX(xc), TRY(yc), rad, rad, -start, -stop); +} + +void +box(double x0, double y0, double x1, double y1) +{ + fprintf(TEXFILE," \\special{pa %d %d}",TRX(x0),TRY(y0)); + fprintf(TEXFILE,"\\special{pa %d %d}",TRX(x1),TRY(y0)); + fprintf(TEXFILE,"\\special{pa %d %d}",TRX(x1),TRY(y1)); + fprintf(TEXFILE,"\\special{pa %d %d}",TRX(x0),TRY(y1)); + fprintf(TEXFILE,"\\special{pa %d %d}",TRX(x0),TRY(y0)); + switch(e1->pen){ + case DASHPEN: + fprintf(TEXFILE,"\\special{da %6.3f}%%\n", e1->dashlen); break; + case DOTPEN: + fprintf(TEXFILE,"\\special{dt %6.3f}%%\n", e1->dashlen); break; + case SOLIDPEN: + default: + fprintf(TEXFILE,"\\special{fp}%%\n"); break; + } +} + +void +circle(double xc, double yc, double r) +{ + int rad = SCX(r); + + fprintf(TEXFILE, " \\special{ar %d %d %d %d 0.0 6.2832}%%\n", + TRX(xc), TRY(yc), rad, rad); +} + +void +closepl(void) +{ + fprintf(TEXFILE, " \\kern %6.3fin\n }\\vss}%%\n", INCHES(e1->sidex)); + fprintf(TEXFILE, " \\kern %6.3fin\n}\n", INCHES(e1->sidey)); +} + +void +disc(double xc, double yc, double r) +{ + fprintf(TEXFILE, " \\special{bk}%%\n"); + circle(xc, yc, r); +} + +void +erase(void) +{ +} + +void +fill(int num[], double *ff[]) +{ + double *xp, *yp, **fp, x0, y0; + int i, *n; + n = num; + fp = ff; + while((i = *n++)){ + xp = *fp++; + yp = xp+1; + x0 = *xp; + y0 = *yp; + move(x0, y0); + while(--i){ + xp += 2; + yp += 2; + vec(*xp, *yp); + } + if (*(xp-2) != x0 || *(yp-2) != y0) + vec(x0, y0); + } +} + +void +frame(double xs, double ys, double xf, double yf) +{ + double osidex, osidey; + osidex = e1->sidex; + osidey = e1->sidey; + e1->left = xs * (e0->left + e0->sidex); + e1->bottom = ys* (e0->bottom + e0->sidey); + e1->sidex = (xf-xs) * e0->sidex; + e1->sidey = (yf-ys) * e0->sidey; + e1->scalex *= (e1->sidex / osidex); + e1->scaley *= (e1->sidey / osidey); +} + +void +line(double x0, double y0, double x1, double y1) +{ + move(x0, y0); + vec(x1, y1); +} + +void +move(double xx, double yy) +{ + e1->copyx = xx; + e1->copyy = yy; +} + +extern double xmin, ymin, xmax, ymax; + +/* tpic TeX coord system uses millinches, printer's points for pensize */ +/* positive y downward, origin at upper left */ + +#define pHEIGHT 5000. +#define pWIDTH 5000. +#define pPENSIZE 9 +#define pPSIZE 10 +#define pDLEN .05 +struct penvir E[2] = { +{0.,pHEIGHT,0.,0.,1.,-1.,pWIDTH,pHEIGHT,0.,0.,0,pPSIZE,SOLIDPEN,pPENSIZE,pDLEN}, +{0.,pHEIGHT,0.,0.,1.,-1.,pWIDTH,pHEIGHT,0.,0.,0,pPSIZE,SOLIDPEN,pPENSIZE,pDLEN} +}; +struct penvir *e0 = E, *e1 = &E[1]; +FILE *TEXFILE; + +void +openpl(void) +{ + TEXFILE = stdout; + + space(xmin, ymin, xmax, ymax); + fprintf(TEXFILE,"\\catcode`@=11\n"); + fprintf(TEXFILE, "\\expandafter\\ifx\\csname graph\\endcsname\\relax"); + fprintf(TEXFILE, " \\alloc@4\\box\\chardef\\insc@unt\\graph\\fi\n"); + fprintf(TEXFILE, "\\catcode`@=12\n"); + fprintf(TEXFILE, "\\setbox\\graph=\\vtop{%%\n"); + fprintf(TEXFILE, " \\baselineskip=0pt \\lineskip=0pt "); + fprintf(TEXFILE, "\\lineskiplimit=0pt\n"); + fprintf(TEXFILE, " \\vbox to0pt{\\hbox{%%\n"); + fprintf(TEXFILE, " \\special{pn %d}%%\n", e1->pdiam); +} + +void +range(double x0, double y0, double x1, double y1) +{ + e1->xmin = x0; + e1->ymin = y0; + if (x1-x0 < .0000001*e1->sidex) + x1=x0+.0000001; + if (y1-y0 < .0000001*e1->sidey) + y1=y0+.0000001; + e1->scalex = e0->scalex*e1->sidex / (x1 - x0); + e1->scaley = e0->scaley*e1->sidey / (y1 - y0); +} + +void +rmove(double xx, double yy) +{ + e1->copyx += xx; + e1->copyy += yy; +} + +void +rvec(double xx, double yy) +{ + vec(xx+e1->copyx, yy+e1->copyy); +} + +void +sbox(double x0, double y0, double x1, double y1) +{ + fprintf(TEXFILE," \\special{bk}%%\n"); + box(x0, y0, x1, y1); +} + +void +vec(double xx, double yy) +{ + fprintf(TEXFILE," \\special{pa %d %d}",TRX(e1->copyx),TRY(e1->copyy)); + e1->copyx = xx; + e1->copyy = yy; + fprintf(TEXFILE,"\\special{pa %d %d}",TRX(xx),TRY(yy)); + switch(e1->pen){ + case DASHPEN: + fprintf(TEXFILE,"\\special{da %6.3f}%%\n", e1->dashlen); break; + case DOTPEN: + fprintf(TEXFILE,"\\special{dt %6.3f}%%\n", e1->dashlen); break; + case SOLIDPEN: + default: + fprintf(TEXFILE,"\\special{fp}%%\n"); break; + } +} |