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//
// $Id: ODirection.m,v 1.1 1997/10/28 05:11:21 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: ODirection.m,v 1.1 1997/10/28 05:11:21 nygard Exp $");
#import "ODirection.h"
#import "Unit.h"
//======================================================================
//
// This instructs the unit to move in a given direction. If it is
// blocked, it tries to strip the horizontal component off the
// direction and move that way, and then the vertical direction if it
// is still blocked, before giving up.
//
// For example, if it's going northeast and is blocked, it then tries
// north. If it is still blocked, it tries moving east.
//
//======================================================================
#define ODirection_VERSION 1
@implementation ODirection
+ (void) initialize
{
if (self == [ODirection class])
{
[self setVersion:ODirection_VERSION];
}
}
//----------------------------------------------------------------------
- initForUnit:(Unit *)aUnit direction:(Direction)dir
{
[super initForUnit:aUnit];
direction = dir;
return self;
}
//----------------------------------------------------------------------
- (void) dealloc
{
[super dealloc];
}
//----------------------------------------------------------------------
- (NSString *) orderText
{
return [NSString stringWithFormat:@"Direction %@", EMShortDirectionName (direction)];
}
//----------------------------------------------------------------------
- (Direction) nextMove
{
Direction dir = direction;
Direction stripHorizontal[9] = {d_north, d_north, d_north, d_west, d_none, d_east, d_south, d_south, d_south};
Direction stripVertical[9] = {d_west, d_north, d_east, d_west, d_none, d_east, d_west, d_south, d_east};
// Try not to crash fighters.
if ([unit unitType] == u_fighter && [unit remainingFuel] == 10)
return d_none;
if (blockedCount == 1)
dir = stripHorizontal[dir];
else if (blockedCount == 2)
dir = stripVertical[dir];
return dir;
}
//----------------------------------------------------------------------
- (BOOL) wasBlocked
{
blockedCount++;
return blockedCount < 3;
}
@end
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.