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

       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_still.cpp

Go to the documentation of this file.

//     ____                _       __               
//    / __ )____  _____   | |     / /___ ___________
//   / __  / __ \/ ___/   | | /| / / __ `/ ___/ ___/
//  / /_/ / /_/ (__  )    | |/ |/ / /_/ / /  (__  ) 
// /_____/\____/____/     |__/|__/\__,_/_/  /____/  
//                                              
//       A futuristic real-time strategy game.
//          This file is part of Bos Wars.
//
//
//      (c) Copyright 1998-2008 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 "missile.h"
#include "unittype.h"
#include "animation.h"
#include "actions.h"
#include "unit.h"
#include "unit_cache.h"
#include "map.h"
#include "pathfinder.h"
#include "spells.h"
#include "player.h"

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

static bool AutoCast(CUnit *unit)
{
    if (unit->AutoCastSpell) {
        for (int i = 0; i < (int)SpellTypeTable.size(); ++i) {
            if (unit->AutoCastSpell[i] && AutoCastSpell(unit, SpellTypeTable[i])) {
                return true;
            }
        }
    }
    return false;
}

static CUnit *UnitToRepairInRange(CUnit *unit, int range)
{
    CUnit *table[UnitMax];
    int n;

    n = UnitCache.Select(unit->X - range, unit->Y - range,
        unit->X + unit->Type->TileWidth + range,
        unit->Y + unit->Type->TileHeight + range,
        table, UnitMax);
    for (int i = 0; i < n; ++i) {
        if (table[i]->IsTeamed(unit) &&
                table[i]->Type->RepairHP &&
                table[i]->Variable[HP_INDEX].Value < table[i]->Variable[HP_INDEX].Max &&
                table[i]->IsVisibleAsGoal(unit->Player)) {
            return table[i];
        }
    }
    return NoUnitP;
}

bool AutoRepair(CUnit *unit)
{
    if (unit->AutoRepair && unit->Type->Variable[AUTOREPAIRRANGE_INDEX].Value) {
        CUnit *repairedUnit = UnitToRepairInRange(unit,
            unit->Type->Variable[AUTOREPAIRRANGE_INDEX].Value);
        if (repairedUnit != NoUnitP) {
            COrder order = *unit->Orders[0];
            CommandRepair(unit, -1, -1, repairedUnit, FlushCommands);
            unit->SavedOrder = order;
            return true;
        }
    }
    return false;
}

static void AutoAttack(CUnit *unit, bool stand_ground)
{
    CUnit *temp;
    CUnit *goal;

    if (unit->Wait) {
        unit->Wait--;
        return;
    }

    // Cowards don't attack unless ordered.
    if (unit->Type->CanAttack && !unit->Type->Coward) {
        // Normal units react in reaction range.
        if (CanMove(unit) && !unit->Removed && !stand_ground) {
            if ((goal = AttackUnitsInReactRange(unit))) {
                // Weak goal, can choose other unit, come back after attack
                CommandAttack(unit, goal->X, goal->Y, NULL, FlushCommands);
                Assert(unit->SavedOrder.Action == UnitActionStill);
                Assert(!unit->SavedOrder.Goal);
                unit->SavedOrder.Action = UnitActionAttack;
                unit->SavedOrder.Range = 0;
                unit->SavedOrder.X = unit->X;
                unit->SavedOrder.Y = unit->Y;
                unit->SavedOrder.Goal = NoUnitP;
            } else {
                unit->Wait = 15;
            }
        // Removed units can only attack in AttackRange, from bunker
        } else if ((goal = AttackUnitsInRange(unit))) {
            temp = unit->Orders[0]->Goal;
            if (temp && temp->Orders[0]->Action == UnitActionDie) {
                temp->RefsDecrease();
                unit->Orders[0]->Goal = temp = NoUnitP;
            }
            if (!unit->SubAction || temp != goal) {
                // New target.
                if (temp) {
                    temp->RefsDecrease();
                }
                unit->Orders[0]->Goal = goal;
                goal->RefsIncrease();
                unit->State = 0;
                unit->SubAction = 1; // Mark attacking.
                UnitHeadingFromDeltaXY(unit,
                    goal->X + (goal->Type->TileWidth - 1) / 2 - unit->X,
                    goal->Y + (goal->Type->TileHeight - 1) / 2 - unit->Y);
            }
            return;
        }
    } else {
        unit->Wait = 15;
    }

    if (unit->SubAction) { // was attacking.
        if ((temp = unit->Orders[0]->Goal)) {
            temp->RefsDecrease();
            unit->Orders[0]->Goal = NoUnitP;
        }
        unit->SubAction = unit->State = 0; // No attacking, restart
    }
    Assert(!unit->Orders[0]->Goal);
}

void ActionStillGeneric(CUnit *unit, bool stand_ground)
{
    // If unit is not bunkered and removed, wait
    if (unit->Removed && (!unit->Container ||
            !unit->Container->Type->CanTransport ||
            !unit->Container->Type->AttackFromTransporter ||
            unit->Type->Missile.Missile->Class == MissileClassNone)) {
        // If unit is in building or transporter it is removed.
        return;
    }

    // Animations
    if (unit->SubAction) { // attacking unit in attack range.
        AnimateActionAttack(unit);
    } else {
        UnitShowAnimation(unit, unit->Type->Animations->Still);
    }

    if (unit->Anim.Unbreakable) { // animation can't be aborted here
        return;
    }

    if (AutoCast(unit) || AutoRepair(unit)) {
        return;
    }

    AutoAttack(unit, stand_ground);

    // Sea and air units are floating up/down.
    // FIXME: remove this and use animations instead
    if (unit->Type->SeaUnit || unit->Type->AirUnit) {
        unit->IY = (MyRand() >> 15) & 1;
    }
}

void HandleActionStill(CUnit *unit)
{
    ActionStillGeneric(unit, false);
}

---