____                _       __
    / __ )____  _____   | |     / /___ ___________
   / __  / __ \/ ___/   | | /| / / __ `/ ___/ ___/
  / /_/ / /_/ (__  )    | |/ |/ / /_/ / /  (__  )
 /_____/\____/____/     |__/|__/\__,_/_/  /____/

       A futuristic real-time strategy game.
          This file is part of Bos Wars.

(C) Copyright 2001-2007 by the Bos Wars and Stratagus Project. Distributed under the "GNU General Public License"

---

action_patrol.cpp

Go to the documentation of this file.

//     ____                _       __               
//    / __ )____  _____   | |     / /___ ___________
//   / __  / __ \/ ___/   | | /| / / __ `/ ___/ ___/
//  / /_/ / /_/ (__  )    | |/ |/ / /_/ / /  (__  ) 
// /_____/\____/____/     |__/|__/\__,_/_/  /____/  
//                                              
//       A futuristic real-time strategy game.
//          This file is part of Bos Wars.
//
//
//      (c) Copyright 1998-2007 by Lutz Sammer and Jimmy Salmon
//
//      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; only version 2 of the License.
//
//      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., 59 Temple Place - Suite 330, Boston, MA
//      02111-1307, USA.
//


/*----------------------------------------------------------------------------
--  Includes
----------------------------------------------------------------------------*/

#include <stdio.h>
#include <stdlib.h>

#include "stratagus.h"
#include "unit.h"
#include "unittype.h"
#include "actions.h"
#include "pathfinder.h"
#include "map.h"

/*----------------------------------------------------------------------------
--  Functions
----------------------------------------------------------------------------*/

extern bool AutoRepair(CUnit *unit);


static void SwapPatrolPoints(CUnit *unit)
{
    int tmp;

    tmp = unit->Orders[0]->Arg1.Patrol.X;
    unit->Orders[0]->Arg1.Patrol.X = unit->Orders[0]->X;
    unit->Orders[0]->X = tmp;
    tmp = unit->Orders[0]->Arg1.Patrol.Y;
    unit->Orders[0]->Arg1.Patrol.Y = unit->Orders[0]->Y;
    unit->Orders[0]->Y = tmp;

    NewResetPath(unit);
}

void HandleActionPatrol(CUnit *unit)
{
    if (unit->Wait) {
        unit->Wait--;
        return;
    }

    if (!unit->SubAction) { // first entry.
        NewResetPath(unit);
        unit->SubAction = 1;
    }

    switch (DoActionMove(unit)) {
        case PF_FAILED:
            unit->SubAction = 1;
            break;
        case PF_UNREACHABLE:
            // Increase range and try again
            unit->SubAction = 1;
            if (unit->Orders[0]->Range <= Map.Info.MapWidth ||
                    unit->Orders[0]->Range <= Map.Info.MapHeight) {
                unit->Orders[0]->Range++;
                break;
            }
            // FALL THROUGH
        case PF_REACHED:
            unit->SubAction = 1;
            unit->Orders[0]->Range = 0;
            SwapPatrolPoints(unit);
            break;
        case PF_WAIT:
            // Wait for a while then give up
            unit->SubAction++;
            if (unit->SubAction == 5) {
                unit->SubAction = 1;
                unit->Orders[0]->Range = 0;
                SwapPatrolPoints(unit);
            }
            break;
        default: // moving
            unit->SubAction = 1;
            break;
    }

    if (!unit->Anim.Unbreakable) {
        //
        // Attack any enemy in reaction range.
        //  If don't set the goal, the unit can then choose a
        //  better goal if moving nearer to enemy.
        //
        if (unit->Type->CanAttack) {
            const CUnit *goal = AttackUnitsInReactRange(unit);
            if (goal) {
                DebugPrint("Patrol attack %d\n" _C_ UnitNumber(goal));
                CommandAttack(unit, goal->X, goal->Y, NULL, FlushCommands);
                // Save current command to come back.
                unit->SavedOrder = *unit->Orders[0];
                unit->ClearAction();
                unit->Orders[0]->Goal = NoUnitP;
                return;
            }
        }

        // Look for something to auto repair
        if (AutoRepair(unit)) {
            return;
        }
    }
}

---