63 lines
1013 B
C
63 lines
1013 B
C
#ifndef lint
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static char sccsid[] = "@(#)subr.c 1.1 94/10/31 SMI"; /* from UCB 4.1 6/27/83 */
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#endif
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#include <stdio.h>
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float obotx = 0.;
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float oboty = 0.;
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float botx = 0.;
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float boty = 0.;
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float scalex = 1.;
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float scaley = 1.;
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int scaleflag;
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int oloy = -1;
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int ohiy = -1;
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int ohix = -1;
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int oextra = -1;
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cont(x,y){
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int hix,hiy,lox,loy,extra;
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int n;
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x = (x-obotx)*scalex + botx;
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y = (y-oboty)*scaley + boty;
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hix=(x>>7) & 037;
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hiy=(y>>7) & 037;
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lox = (x>>2)&037;
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loy=(y>>2)&037;
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extra=(x & 03) | ((y & 03) << 2);
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n = (abs(hix-ohix) + abs(hiy-ohiy) + 6) / 12;
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if(hiy != ohiy){
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putch(hiy|040);
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ohiy=hiy;
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}
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if(hix != ohix){
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if(extra != oextra){
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putch(extra|0140);
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oextra=extra;
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}
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putch(loy|0140);
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putch(hix|040);
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ohix=hix;
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oloy=loy;
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}
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else{
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if(extra != oextra){
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putch(extra|0140);
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putch(loy|0140);
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oextra=extra;
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oloy=loy;
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}
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else if(loy != oloy){
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putch(loy|0140);
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oloy=loy;
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}
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}
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putch(lox|0100);
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while(n--)
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putch(0);
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}
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putch(c){
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putc(c,stdout);
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}
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