usr/src/games/trek/visual.c

/*
 * Copyright (c) 1980, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)visual.c    8.1 (Berkeley) 5/31/93";
#endif /* not lint */

# include       "trek.h"

/*
**  VISUAL SCAN
**
**      A visual scan is made in a particular direction of three sectors
**      in the general direction specified.  This takes time, and
**      Klingons can attack you, so it should be done only when sensors
**      are out.
*/

/* This struct[] has the delta x, delta y for particular directions */
struct xy       Visdelta[11] =
{
        -1,     -1,
        -1,      0,
        -1,      1,
         0,      1,
         1,      1,
         1,      0,
         1,     -1,
         0,     -1,
        -1,     -1,
        -1,      0,
        -1,      1
};

visual()
{
        register int            ix, iy;
        int                     co;
        register struct xy      *v;

        co = getintpar("direction");
        if (co < 0 || co > 360)
                return;
        co = (co + 22) / 45;
        v = &Visdelta[co];
        ix = Ship.sectx + v->x;
        iy = Ship.secty + v->y;
        if (ix < 0 || ix >= NSECTS || iy < 0 || iy >= NSECTS)
                co = '?';
        else
                co = Sect[ix][iy];
        printf("%d,%d %c ", ix, iy, co);
        v++;
        ix = Ship.sectx + v->x;
        iy = Ship.secty + v->y;
        if (ix < 0 || ix >= NSECTS || iy < 0 || iy >= NSECTS)
                co = '?';
        else
                co = Sect[ix][iy];
        printf("%c ", co);
        v++;
        ix = Ship.sectx + v->x;
        iy = Ship.secty + v->y;
        if (ix < 0 || ix >= NSECTS || iy < 0 || iy >= NSECTS)
                co = '?';
        else
                co = Sect[ix][iy];
        printf("%c %d,%d\n", co, ix, iy);
        Move.time = 0.05;
        Move.free = 0;
}