usr/src/lib/libplot/t4013/subr.c

/*-
 * Copyright (c) 1985, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This module is believed to contain source code proprietary to AT&T.
 * Use and redistribution is subject to the Berkeley Software License
 * Agreement and your Software Agreement with AT&T (Western Electric).
 */

#ifndef lint
static char sccsid[] = "@(#)subr.c      8.1 (Berkeley) 6/4/93";
#endif /* not lint */

#include <stdio.h>
float obotx = 0.;
float oboty = 0.;
float botx = 0.;
float boty = 0.;
float scalex = 1.;
float scaley = 1.;
int scaleflag;

int oloy = -1;
int ohiy = -1;
int ohix = -1;
cont(x,y){
        int hix,hiy,lox,loy;
        int n;
        x = (x-obotx)*scalex + botx;
        y = (y-oboty)*scaley + boty;
        hix=(x>>5) & 037;
        hiy=(y>>5) & 037;
        lox = x & 037;
        loy = y & 037;
        n = (abs(hix-ohix) + abs(hiy-ohiy) + 6) / 12;
        if(hiy != ohiy){
                putch(hiy|040);
                ohiy=hiy;
        }
        if(hix != ohix){
                putch(loy|0140);
                putch(hix|040);
                ohix=hix;
                oloy=loy;
        }
        else if(loy != oloy){
                putch(loy|0140);
                oloy=loy;
        }
        putch(lox|0100);
        while(n--)
                putch(0);
}

putch(c){
        putc(c,stdout);
}