77 lines
1.2 KiB
C
77 lines
1.2 KiB
C
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
|
|
/* All Rights Reserved */
|
|
|
|
/* THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF AT&T */
|
|
/* The copyright notice above does not evidence any */
|
|
/* actual or intended publication of such source code. */
|
|
|
|
#ident "$Revision: 1.2 $"
|
|
|
|
#include <stdio.h>
|
|
|
|
extern int abs(int);
|
|
void putch(int);
|
|
|
|
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;
|
|
int oextra = -1;
|
|
|
|
void
|
|
cont(int x, int y)
|
|
{
|
|
int hix,hiy,lox,loy,extra;
|
|
int n;
|
|
x = (x-obotx)*scalex + botx;
|
|
y = (y-oboty)*scaley + boty;
|
|
hix=(x>>7) & 037;
|
|
hiy=(y>>7) & 037;
|
|
lox = (x>>2)&037;
|
|
loy=(y>>2)&037;
|
|
extra=x&03+(y<<2)&014;
|
|
n = (abs(hix-ohix) + abs(hiy-ohiy) + 6) / 12;
|
|
if(hiy != ohiy){
|
|
putch(hiy|040);
|
|
ohiy=hiy;
|
|
}
|
|
if(hix != ohix){
|
|
if(extra != oextra){
|
|
putch(extra|0140);
|
|
oextra=extra;
|
|
}
|
|
putch(loy|0140);
|
|
putch(hix|040);
|
|
ohix=hix;
|
|
oloy=loy;
|
|
}
|
|
else{
|
|
if(extra != oextra){
|
|
putch(extra|0140);
|
|
putch(loy|0140);
|
|
oextra=extra;
|
|
oloy=loy;
|
|
}
|
|
else if(loy != oloy){
|
|
putch(loy|0140);
|
|
oloy=loy;
|
|
}
|
|
}
|
|
putch(lox|0100);
|
|
while(n--)
|
|
putch(0);
|
|
}
|
|
|
|
void
|
|
putch(int c)
|
|
{
|
|
putc(c,stdout);
|
|
}
|