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/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
#ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.1 */
/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
/*
* Copyright (c) 1983, 1984 1985, 1986, 1987, 1988, Sun Microsystems, Inc.
* All Rights Reserved.
*/
#include <stdio.h>
#include "con.h"
abval(q)
{
return (q>=0 ? q : -q);
}
xconv (xp)
{
/* x position input is -2047 to +2047, output must be 0 to PAGSIZ*HORZRES */
xp += 2048;
/* the computation is newx = xp*(PAGSIZ*HORZRES)/4096 */
return (xoffset + xp /xscale);
}
yconv (yp)
{
/* see description of xconv */
yp += 2048;
return (yp / yscale);
}
inplot()
{
stty(OUTF, &PTTY);
spew (ACK);
}
outplot()
{
spew(ESC);
spew(ACK);
fflush(stdout);
stty(OUTF, &ITTY);
}
spew(ch)
{
if(ch == UP)putc(ESC,stdout);
putc(ch, stdout);
}
tobotleft ()
{
move(-2048,-2048);
}
reset()
{
outplot();
exit(0);
}
float
dist2 (x1, y1, x2, y2)
{
float t,v;
t = x2-x1;
v = y1-y2;
return (t*t+v*v);
}
swap (pa, pb)
int *pa, *pb;
{
int t;
t = *pa;
*pa = *pb;
*pb = t;
}
movep (xg, yg)
{
int i,ch;
if((xg == xnow) && (yg == ynow))return;
/* if we need to go to left margin, just CR */
if (xg < xnow/2)
{
spew(CR);
xnow = 0;
}
i = (xg-xnow)/HORZRES;
if(xnow < xg)ch = RIGHT;
else ch = LEFT;
xnow += i*HORZRES;
i = abval(i);
while(i--)spew(ch);
i = abval(xg-xnow);
inplot();
while(i--) spew(ch);
outplot();
i=(yg-ynow)/VERTRES;
if(ynow < yg)ch = UP;
else ch = DOWN;
ynow += i*VERTRES;
i = abval(i);
while(i--)spew(ch);
i=abval(yg-ynow);
inplot();
while(i--)spew(ch);
outplot();
xnow = xg; ynow = yg;
}
xsc(xi){
int xa;
xa = (xi - obotx) * scalex + botx;
return(xa);
}
ysc(yi){
int ya;
ya = (yi - oboty) *scaley +boty;
return(ya);
}
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