ftp.nice.ch/Attic/openStep/games/Empire.0.6.m.NIS.bs.tgz#/Empire.0.6/src/Orders.subproj/OSentry.m

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//
// $Id: OSentry.m,v 1.1 1997/10/28 05:11:42 nygard Exp $
//

//
//  This file is a part of Empire, a game of exploration and conquest.
//  Copyright (C) 1996  Steve Nygard
//
//  This program is free software; you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation; either version 2 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program; if not, write to the Free Software
//  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
//
//  You may contact the author by:
//     e-mail:  nygard@telusplanet.net
//

#import "Empire.h"

RCSID ("$Id: OSentry.m,v 1.1 1997/10/28 05:11:42 nygard Exp $");

#import "OSentry.h"

#import "Unit.h"

//======================================================================
//
// This makes a unit wait for enemy activity, or to be loaded on a ship,
// so the user doesn't have to deal with the unit each turn.  The unit
// will "wake up" when it encounters an enemy unit, allowing the player
// to give new orders.  This doesn't make sense for fighters unless they
// are within a city or on board a ship, since they will run out of fuel,
// but it tries not to crash them.
//
// A sentried unit doesn't use up it's movement points until the end of
// the turn, so that they can be reactivated during survey mode if
// desired.
//
//======================================================================

#define OSentry_VERSION 1

@implementation OSentry

+ (void) initialize
{
    if (self == [OSentry class])
    {
        [self setVersion:OSentry_VERSION];
    }
}

//----------------------------------------------------------------------

- initForUnit:(Unit *)aUnit
{
    [super initForUnit:aUnit];

    return self;
}

//----------------------------------------------------------------------

- (void) dealloc
{
    [super dealloc];
}

//----------------------------------------------------------------------

- (NSString *) orderText
{
    return @"Sentry";
}

//----------------------------------------------------------------------

- (void) aboutToMove
{
    // Try not to crash fighters.
    if ([unit unitType] != u_fighter || [unit currentRange] > 10 || [unit isOnBoardShip] == YES || [unit isInCity] == YES)
        [unit skipMove];
}

//----------------------------------------------------------------------

- (Direction) nextMove
{
    // Skip move...

    return d_none;
}

//----------------------------------------------------------------------

- (BOOL) wasBlocked
{
    return NO;
}

//----------------------------------------------------------------------

- (BOOL) isSentried
{
    return YES;
}

@end

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