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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI" /* SVr4.0 1.2 */
/*LINTLIBRARY*/
#include <stdlib.h>
#include <math.h>
#include "con.h"
int ynow = 0;
static void
iline(int cx0, int cy0, int cx1, int cy1) {
int maxp, tt;
char chx, chy, command;
float xd, yd;
movep(cx0, cy0);
maxp = (int)(sqrt(dist2(cx0, cy0, cx1, cy1)) / 2.);
xd = cx1 - cx0;
yd = cy1 - cy0;
command = COM|((xd < 0) << 1)|(yd < 0);
if (maxp == 0) {
xd = 0;
yd = 0;
} else {
xd /= maxp;
yd /= maxp;
}
inplot();
spew(command);
for (tt = 0; tt <= maxp; tt++) {
chx = (char)(cx0 + xd * tt - xnow);
xnow += chx;
chx = abs(chx);
chy = (char)(cy0 + yd * tt - ynow);
ynow += chy;
chy = abs(chy);
spew(ADDR|chx<<3|chy);
}
outplot();
}
void
line(short x0, short y0, short x1, short y1) {
iline(xconv(xsc(x0)), yconv(ysc(y0)), xconv(xsc(x1)), yconv(ysc(y1)));
}
void
cont(short x0, short y0) {
iline(xnow, ynow, xconv(xsc(x0)), yconv(ysc(y0)));
}
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