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#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;
}
}
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