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monster.cpp
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monster.cpp
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//////////////////////////////////////////////////////////////////////
// OpenTibia - an opensource roleplaying game
//////////////////////////////////////////////////////////////////////
//
//////////////////////////////////////////////////////////////////////
// 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//////////////////////////////////////////////////////////////////////
#include "otpch.h"
#include "monster.h"
#include "monsters.h"
#include "game.h"
#include "spells.h"
#include "combat.h"
#include "spawn.h"
#include "configmanager.h"
#include "party.h"
#include <vector>
#include <string>
#include <sstream>
#include <algorithm>
extern Game g_game;
extern ConfigManager g_config;
extern Monsters g_monsters;
AutoList<Monster>Monster::listMonster;
#ifdef __ENABLE_SERVER_DIAGNOSTIC__
uint32_t Monster::monsterCount = 0;
#endif
Monster* Monster::createMonster(MonsterType* mType)
{
return new Monster(mType);
}
Monster* Monster::createMonster(const std::string& name)
{
MonsterType* mType = g_monsters.getMonsterType(name);
if(!mType){
return NULL;
}
return createMonster(mType);
}
Monster::Monster(MonsterType* _mtype) :
Creature()
{
isIdle = true;
semiIdle = false;
isMasterInRange = false;
mType = _mtype;
spawn = NULL;
defaultOutfit = mType->outfit;
currentOutfit = mType->outfit;
health = mType->health;
healthMax = mType->health_max;
baseSpeed = mType->base_speed;
internalLight.level = mType->lightLevel;
internalLight.color = mType->lightColor;
minCombatValue = 0;
maxCombatValue = 0;
targetTicks = 0;
targetChangeTicks = 0;
targetChangeCooldown = 0;
attackTicks = 0;
defenseTicks = 0;
yellTicks = 0;
extraMeleeAttack = false;
timeOfLastHit = 0;
hadRecentBattleVar = false;
strDescription = mType->nameDescription;
toLowerCaseString(strDescription);
// register creature events
MonsterScriptList::iterator it;
for(it = mType->scriptList.begin(); it != mType->scriptList.end(); ++it){
if(!registerCreatureEvent(*it)){
std::cout << "Warning: [Monster::Monster]. Unknown event name - " << *it << std::endl;
}
}
#ifdef __ENABLE_SERVER_DIAGNOSTIC__
monsterCount++;
#endif
}
Monster::~Monster()
{
clearTargetList();
clearFriendList();
#ifdef __ENABLE_SERVER_DIAGNOSTIC__
monsterCount--;
#endif
}
void Monster::onAttackedCreatureDissapear(bool isLogout)
{
#ifdef __DEBUG__
std::cout << "Attacked creature dissapeared." << std::endl;
#endif
attackTicks = 0;
extraMeleeAttack = true;
}
void Monster::onFollowCreatureDissapear(bool isLogout)
{
#ifdef __DEBUG__
std::cout << "Follow creature dissapeared." << std::endl;
#endif
}
void Monster::onAttackedCreature(Creature* target)
{
Creature::onAttackedCreature(target);
if(isSummon()){
getMaster()->onSummonAttackedCreature(this, target);
}
}
void Monster::onAttackedCreatureDrainHealth(Creature* target, int32_t points)
{
Creature::onAttackedCreatureDrainHealth(target, points);
if(isSummon()){
getMaster()->onSummonAttackedCreatureDrainHealth(this, target, points);
}
}
void Monster::onAttackedCreatureDrainMana(Creature* target, int32_t points)
{
Creature::onAttackedCreatureDrainMana(target, points);
if(isSummon()){
getMaster()->onSummonAttackedCreatureDrainMana(this, target, points);
}
}
void Monster::onCreatureAppear(const Creature* creature, bool isLogin)
{
Creature::onCreatureAppear(creature, isLogin);
if(creature == this){
//We just spawned lets look around to see who is there.
if(isSummon()){
isMasterInRange = canSee(getMaster()->getPosition());
}
updateTargetList();
updateIdleStatus();
}
else{
onCreatureEnter(const_cast<Creature*>(creature));
}
}
void Monster::onCreatureDisappear(const Creature* creature, bool isLogout)
{
Creature::onCreatureDisappear(creature, isLogout);
if(creature == this){
if(spawn){
spawn->startSpawnCheck();
}
setIdle(true);
}
else{
onCreatureLeave(const_cast<Creature*>(creature));
}
}
void Monster::onCreatureMove(const Creature* creature, const Tile* newTile, const Position& newPos,
const Tile* oldTile, const Position& oldPos, bool teleport)
{
Creature::onCreatureMove(creature, newTile, newPos, oldTile, oldPos, teleport);
if(creature == this){
if(isSummon()){
isMasterInRange = canSee(getMaster()->getPosition());
}
updateTargetList();
updateIdleStatus();
/*
TODO: Optimizations here
if(teleport){
//do a full update of the friend/target list
}
else{
//partial update of the friend/target list
}
*/
}
else{
bool canSeeNewPos = canSee(newPos);
bool canSeeOldPos = canSee(oldPos);
if(canSeeNewPos && !canSeeOldPos){
onCreatureEnter(const_cast<Creature*>(creature));
}
else if(!canSeeNewPos && canSeeOldPos){
onCreatureLeave(const_cast<Creature*>(creature));
}
if(isSummon() && getMaster() == creature){
if(canSeeNewPos){
//Turn the summon on again
isMasterInRange = true;
}
}
updateIdleStatus();
if(!followCreature && !isSummon()){
//we have no target lets try pick this one
if(isOpponent(creature)){
selectTarget(const_cast<Creature*>(creature));
}
}
}
}
void Monster::updateTargetList()
{
CreatureList::iterator it;
for(it = friendList.begin(); it != friendList.end();){
if((*it)->getHealth() <= 0 || !canSee((*it)->getPosition())){
(*it)->releaseThing2();
it = friendList.erase(it);
}
else
++it;
}
for(it = targetList.begin(); it != targetList.end();){
if((*it)->getHealth() <= 0 || !canSee((*it)->getPosition())){
(*it)->releaseThing2();
it = targetList.erase(it);
}
else
++it;
}
const SpectatorVec& list = g_game.getSpectators(getPosition());
for(SpectatorVec::const_iterator it = list.begin(); it != list.end(); ++it){
if((*it) != this && canSee((*it)->getPosition())){
onCreatureFound(*it);
}
}
}
void Monster::clearTargetList()
{
for(CreatureList::iterator it = targetList.begin(); it != targetList.end(); ++it){
(*it)->releaseThing2();
}
targetList.clear();
}
void Monster::clearFriendList()
{
for(CreatureList::iterator it = friendList.begin(); it != friendList.end(); ++it){
(*it)->releaseThing2();
}
friendList.clear();
}
void Monster::onCreatureFound(Creature* creature, bool pushFront /*= false*/)
{
if(isFriend(creature)){
assert(creature != this);
if(std::find(friendList.begin(), friendList.end(), creature) == friendList.end()){
creature->useThing2();
friendList.push_back(creature);
}
}
if(isOpponent(creature)){
assert(creature != this);
if(std::find(targetList.begin(), targetList.end(), creature) == targetList.end()){
creature->useThing2();
if(pushFront){
targetList.push_front(creature);
}
else{
targetList.push_back(creature);
}
}
}
updateIdleStatus();
}
void Monster::onCreatureEnter(Creature* creature)
{
//std::cout << "onCreatureEnter - " << creature->getName() << std::endl;
if(getMaster() == creature){
//Turn the summon on again
isMasterInRange = true;
updateIdleStatus();
}
onCreatureFound(creature, true);
}
bool Monster::isFriend(const Creature* creature)
{
if(isPlayerSummon()){
const Player* masterPlayer = getPlayerMaster();
const Player* tmpPlayer = NULL;
if(creature->getPlayer()){
tmpPlayer = creature->getPlayer();
}
else if(creature->isPlayerSummon()){
tmpPlayer = creature->getPlayerMaster();
}
if(tmpPlayer && (tmpPlayer == getMaster() || masterPlayer->isPartner(tmpPlayer)) ){
return true;
}
}
else{
if(creature->getMonster() && !creature->isSummon()){
return true;
}
}
return false;
}
bool Monster::isOpponent(const Creature* creature)
{
if(isPlayerSummon()){
if(creature != getMaster()){
return true;
}
}
else{
if( (creature->getPlayer() && !creature->getPlayer()->hasFlag(PlayerFlag_IgnoredByMonsters)) ||
(creature->isPlayerSummon()) ) {
return true;
}
}
return false;
}
void Monster::onCreatureLeave(Creature* creature)
{
//std::cout << "onCreatureLeave - " << creature->getName() << std::endl;
if(getMaster() == creature){
//Turn the monster off until its master comes back
isMasterInRange = false;
updateIdleStatus();
}
//update friendList
if(isFriend(creature)){
CreatureList::iterator it = std::find(friendList.begin(), friendList.end(), creature);
if(it != friendList.end()){
(*it)->releaseThing2();
friendList.erase(it);
}
#ifdef __DEBUG__
else{
std::cout << "Monster: " << creature->getName() << " not found in the friendList." << std::endl;
}
#endif
}
//update targetList
if(isOpponent(creature)){
CreatureList::iterator it = std::find(targetList.begin(), targetList.end(), creature);
if(it != targetList.end()){
(*it)->releaseThing2();
targetList.erase(it);
if(targetList.empty()){
updateIdleStatus();
}
}
#ifdef __DEBUG__
else{
std::cout << "Player: " << creature->getName() << " not found in the targetList." << std::endl;
}
#endif
}
}
bool Monster::searchTarget(TargetSearchType_t searchType /*= TARGETSEARCH_DEFAULT*/)
{
#ifdef __DEBUG__
std::cout << "Searching target... " << std::endl;
#endif
std::list<Creature*> resultList;
const Position& myPos = getPosition();
for(CreatureList::iterator it = targetList.begin(); it != targetList.end(); ++it){
if(followCreature != (*it) && isTarget(*it)){
if(searchType == TARGETSEARCH_RANDOM || canUseAttack(myPos, *it)){
resultList.push_back(*it);
}
}
}
switch(searchType){
case TARGETSEARCH_NEAREAST:
{
Creature* target = NULL;
int32_t minRange = -1;
for(std::list<Creature*>::iterator it = resultList.begin(); it != resultList.end(); ++it){
if(minRange == -1 || std::max(std::abs(myPos.x - (*it)->getPosition().x), std::abs(myPos.y - (*it)->getPosition().y)) < minRange){
target = *it;
minRange = std::max(std::abs(myPos.x - (*it)->getPosition().x), std::abs(myPos.y - (*it)->getPosition().y));
}
}
if(target && selectTarget(target)){
return true;
}
break;
}
case TARGETSEARCH_DEFAULT:
case TARGETSEARCH_ATTACKRANGE:
case TARGETSEARCH_RANDOM:
default:
{
if(!resultList.empty()){
uint32_t index = random_range(0, resultList.size() - 1);
CreatureList::iterator it = resultList.begin();
std::advance(it, index);
#ifdef __DEBUG__
std::cout << "Selecting target " << (*it)->getName() << std::endl;
#endif
return selectTarget(*it);
}
if(searchType == TARGETSEARCH_ATTACKRANGE){
return false;
}
break;
}
}
//lets just pick the first target in the list
for(CreatureList::iterator it = targetList.begin(); it != targetList.end(); ++it){
if(followCreature != (*it) && selectTarget(*it)){
#ifdef __DEBUG__
std::cout << "Selecting target " << (*it)->getName() << std::endl;
#endif
return true;
}
}
return false;
}
void Monster::onFollowCreatureComplete(const Creature* creature)
{
if(creature){
CreatureList::iterator it = std::find(targetList.begin(), targetList.end(), creature);
Creature* target;
if(it != targetList.end()){
target = (*it);
targetList.erase(it);
if(hasFollowPath){
//push target we have found a path to the front
targetList.push_front(target);
}
else if(!isSummon()){
//push target we have not found a path to the back
targetList.push_back(target);
}
else{
//Since we removed the creature from the targetList (and not put it back) we have to release it too
target->releaseThing2();
}
}
}
}
BlockType_t Monster::blockHit(Creature* attacker, CombatType_t combatType, int32_t& damage,
bool checkDefense /* = false*/, bool checkArmor /* = false*/)
{
BlockType_t blockType = Creature::blockHit(attacker, combatType, damage, checkDefense, checkArmor);
if(damage != 0){
int32_t elementMod = 0;
ElementMap::iterator it = mType->elementMap.find(combatType);
if(it != mType->elementMap.end()){
elementMod = it->second;
}
if(elementMod != 0)
damage = (int32_t)std::ceil(damage * ((float)(100 - elementMod) / 100));
if(damage <= 0){
damage = 0;
blockType = BLOCK_DEFENSE;
}
}
return blockType;
}
bool Monster::isTarget(Creature* creature)
{
if( creature->isRemoved() ||
!creature->isAttackable() ||
creature->getZone() == ZONE_PROTECTION ||
!canSeeCreature(creature)){
return false;
}
if(creature->getPosition().z != getPosition().z){
return false;
}
return true;
}
bool Monster::selectTarget(Creature* creature)
{
#ifdef __DEBUG__
std::cout << "Selecting target... " << std::endl;
#endif
if(!isTarget(creature)){
return false;
}
CreatureList::iterator it = std::find(targetList.begin(), targetList.end(), creature);
if(it == targetList.end()){
//Target not found in our target list.
#ifdef __DEBUG__
std::cout << "Target not found in targetList." << std::endl;
#endif
return false;
}
if(isHostile() || isSummon()){
if(setAttackedCreature(creature) && !isSummon()){
g_dispatcher.addTask(createTask(
boost::bind(&Game::checkCreatureAttack, &g_game, getID())));
}
}
return setFollowCreature(creature, true);
}
void Monster::setIdle(bool _idle)
{
if(isRemoved() || getHealth() <= 0){
return;
}
isIdle = _idle;
if(!isIdle){
g_game.addCreatureCheck(this);
}
else{
semiIdle = false;
onIdleStatus();
clearTargetList();
clearFriendList();
g_game.removeCreatureCheck(this);
}
}
void Monster::updateIdleStatus()
{
//heightMinimum is declared static to avoid
//several calls for getNumber (updateIdleStatus is called often)
static int heightMinimum = 0;
if (heightMinimum <= 0)
heightMinimum = std::max(g_config.getNumber(ConfigManager::HEIGHT_MINIMUM_FOR_IDLE),(int64_t)1);
bool idle = false;
semiIdle = false;
if(conditions.empty()){
if(isSummon()){
if(!isMasterInRange){
idle = true;
}
else if(getMaster()->getMonster() && getMaster()->getMonster()->getIdleStatus()){
idle = true;
}
}
else{
idle = targetList.empty();
semiIdle = !idle;
for(CreatureList::iterator it = targetList.begin(); it != targetList.end(); ++it){
if (std::abs((*it)->getPosition().z - getPosition().z) < heightMinimum) {
semiIdle = false;
break;
}
}
}
}
setIdle(idle);
}
void Monster::onAddCondition(ConditionType_t type, bool hadCondition)
{
Creature::onAddCondition(type, hadCondition);
//the walkCache need to be updated if the monster becomes "resistent" to the damage, see Tile::__queryAdd()
if(type == CONDITION_FIRE || type == CONDITION_ENERGY || type == CONDITION_POISON){
updateMapCache();
}
updateIdleStatus();
}
void Monster::onEndCondition(ConditionType_t type, bool lastCondition)
{
Creature::onEndCondition(type, lastCondition);
//the walkCache need to be updated if the monster loose the "resistent" to the damage, see Tile::__queryAdd()
if(type == CONDITION_FIRE || type == CONDITION_ENERGY || type == CONDITION_POISON){
updateMapCache();
}
updateIdleStatus();
}
void Monster::onThink(uint32_t interval)
{
updateHadRecentBattleVar();
Creature::onThink(interval);
if(despawn()){
g_game.removeCreature(this, true);
setIdle(true);
}
else{
updateIdleStatus();
if(!isIdle && !semiIdle){
addEventWalk();
if(isSummon()){
if(!attackedCreature){
if(getMaster() && getMaster()->getAttackedCreature()){
///This happens if the monster is summoned during combat
selectTarget(getMaster()->getAttackedCreature());
}
else if(getMaster() != followCreature){
//Our master has not ordered us to attack anything, lets follow him around instead.
setFollowCreature(getMaster());
}
}
else if(attackedCreature == this){
setFollowCreature(NULL);
}
else if(followCreature != attackedCreature){
//This happens just after a master orders an attack, so lets follow it aswell.
setFollowCreature(attackedCreature);
}
}
else if(!targetList.empty()){
if(!followCreature || !hasFollowPath){
searchTarget();
}
else if(isFleeing()){
if(attackedCreature && !canUseAttack(getPosition(), attackedCreature)){
searchTarget(TARGETSEARCH_ATTACKRANGE);
}
}
}
onThinkTarget(interval);
onThinkYell(interval);
onThinkDefense(interval);
}
}
}
void Monster::doAttacking(uint32_t interval)
{
if(!attackedCreature || (isSummon() && attackedCreature == this)){
return;
}
bool updateLook = true;
resetTicks = interval != 0;
attackTicks += interval;
for(SpellList::iterator it = mType->spellAttackList.begin(); it != mType->spellAttackList.end(); ++it){
bool inRange = false;
/* updates positions and check if there is still an attackedCreature
as it all may be changed at the previous spell (if the spell teleports attacked creature) */
if(!attackedCreature){
break;
}
const Position& myPos = getPosition();
const Position& targetPos = attackedCreature->getPosition();
if(canUseSpell(myPos, targetPos, *it, interval, inRange)){
if(it->chance >= (uint32_t)random_range(1, 100)){
if(updateLook){
updateLookDirection();
updateLook = false;
}
minCombatValue = it->minCombatValue;
maxCombatValue = it->maxCombatValue;
it->spell->castSpell(this, attackedCreature);
if(it->isMelee){
extraMeleeAttack = false;
}
#ifdef __DEBUG__
static uint64_t prevTicks = OTSYS_TIME();
std::cout << "doAttacking ticks: " << OTSYS_TIME() - prevTicks << std::endl;
prevTicks = OTSYS_TIME();
#endif
}
}
if(!inRange && it->isMelee){
//melee swing out of reach
extraMeleeAttack = true;
}
}
if(updateLook){
updateLookDirection();
}
if(resetTicks){
attackTicks = 0;
}
}
bool Monster::canUseAttack(const Position& pos, const Creature* target) const
{
if(isHostile()){
const Position& targetPos = target->getPosition();
for(SpellList::iterator it = mType->spellAttackList.begin(); it != mType->spellAttackList.end(); ++it){
if((*it).range != 0 && std::max(std::abs(pos.x - targetPos.x), std::abs(pos.y - targetPos.y)) <= (int32_t)(*it).range){
return g_game.isSightClear(pos, targetPos, true);
}
}
return false;
}
return true;
}
bool Monster::canUseSpell(const Position& pos, const Position& targetPos,
const spellBlock_t& sb, uint32_t interval, bool& inRange)
{
inRange = true;
if(!sb.isMelee || !extraMeleeAttack){
if(sb.speed > attackTicks){
resetTicks = false;
return false;
}
if(attackTicks % sb.speed >= interval){
//already used this spell for this round
return false;
}
}
if(sb.range != 0 && std::max(std::abs(pos.x - targetPos.x), std::abs(pos.y - targetPos.y)) > (int32_t)sb.range){
inRange = false;
return false;
}
return true;
}
void Monster::onThinkTarget(uint32_t interval)
{
if(!isSummon()){
if(mType->changeTargetSpeed > 0){
bool canChangeTarget = true;
if(targetChangeCooldown > 0){
targetChangeCooldown -= interval;
if(targetChangeCooldown <= 0){
targetChangeCooldown = 0;
targetChangeTicks = (uint32_t)mType->changeTargetSpeed;
}
else{
canChangeTarget = false;
}
}
if(canChangeTarget){
targetChangeTicks += interval;
if(targetChangeTicks >= (uint32_t)mType->changeTargetSpeed){
targetChangeTicks = 0;
targetChangeCooldown = (uint32_t)mType->changeTargetSpeed;
if(mType->changeTargetChance >= random_range(1, 100)){
if(mType->targetDistance <= 1){
searchTarget(TARGETSEARCH_RANDOM);
}
else{
searchTarget(TARGETSEARCH_NEAREAST);
}
}
}
}
}
}
}
void Monster::onThinkDefense(uint32_t interval)
{
resetTicks = true;
defenseTicks += interval;
for(SpellList::iterator it = mType->spellDefenseList.begin(); it != mType->spellDefenseList.end(); ++it){
if(it->speed > defenseTicks){
resetTicks = false;
continue;
}
if(defenseTicks % it->speed >= interval){
//already used this spell for this round
continue;
}
if((it->chance >= (uint32_t)random_range(1, 100))){
minCombatValue = it->minCombatValue;
maxCombatValue = it->maxCombatValue;
it->spell->castSpell(this, this);
}
}
if(!isSummon() && (int32_t)summons.size() < mType->maxSummons){
for(SummonList::iterator it = mType->summonList.begin(); it != mType->summonList.end(); ++it){
if(it->speed > defenseTicks){
resetTicks = false;
continue;
}
if((int32_t)summons.size() >= mType->maxSummons){
continue;
}
if(defenseTicks % it->speed >= interval){
//already used this spell for this round
continue;
}
if((it->chance >= (uint32_t)random_range(1, 100)) && getSummonCount(it->name) < it->max){
Monster* summon = Monster::createMonster(it->name);
if(summon){
const Position& summonPos = getPosition();
addSummon(summon);
if(g_game.placeCreature(summon, summonPos)){
g_game.addMagicEffect(summon->getPosition(), NM_ME_TELEPORT);
g_game.addMagicEffect(getPosition(), NM_ME_MAGIC_ENERGY);
}
else{
removeSummon(summon);
}
}
}
}
}
if(resetTicks){
defenseTicks = 0;
}
}
void Monster::onThinkYell(uint32_t interval)
{
if(mType->yellSpeedTicks > 0){
yellTicks += interval;
if(yellTicks >= mType->yellSpeedTicks){
yellTicks = 0;
if(!mType->voiceVector.empty() && (mType->yellChance >= (uint32_t)random_range(1, 100))){
uint32_t index = random_range(0, mType->voiceVector.size() - 1);
const voiceBlock_t& vb = mType->voiceVector[index];
if(vb.yellText){
g_game.internalCreatureSay(this, SPEAK_MONSTER_YELL, vb.text);
}
else{
g_game.internalCreatureSay(this, SPEAK_MONSTER_SAY, vb.text);
}
}
}
}
}
void Monster::onWalk()
{
Creature::onWalk();
}
bool Monster::pushItem(Item* item, int32_t radius)
{
const Position& centerPos = item->getPosition();
typedef std::pair<int32_t, int32_t> relPair;
std::vector<relPair> relList;
relList.push_back(relPair(-1, -1));
relList.push_back(relPair(-1, 0));
relList.push_back(relPair(-1, 1));
relList.push_back(relPair(0, -1));
relList.push_back(relPair(0, 1));
relList.push_back(relPair(1, -1));
relList.push_back(relPair(1, 0));
relList.push_back(relPair(1, 1));
std::random_shuffle(relList.begin(), relList.end());
Position tryPos;
for(int32_t n = 1; n <= radius; ++n){
for(std::vector<relPair>::iterator it = relList.begin(); it != relList.end(); ++it){
int32_t dx = it->first * n;
int32_t dy = it->second * n;
tryPos = centerPos;
tryPos.x = tryPos.x + dx;
tryPos.y = tryPos.y + dy;
Tile* tile = g_game.getTile(tryPos.x, tryPos.y, tryPos.z);
if(tile && g_game.canThrowObjectTo(centerPos, tryPos)){
if(g_game.internalMoveItem(item->getParent(), tile,
INDEX_WHEREEVER, item, item->getItemCount(), NULL) == RET_NOERROR){
return true;
}
}
}
}
return false;
}
void Monster::pushItems(Tile* tile)
{
//We can not use iterators here since we can push the item to another tile
//which will invalidate the iterator.
//start from the end to minimize the amount of traffic
if(TileItemVector* items = tile->getItemList()){
uint32_t moveCount = 0;
uint32_t removeCount = 0;
int32_t downItemSize = tile->getDownItemCount();
for(int32_t i = downItemSize - 1; i >= 0; --i){
assert(i >= 0 && i < downItemSize);
Item* item = items->at(i);
if(item && item->hasProperty(MOVEABLE) && (item->hasProperty(BLOCKPATH)
|| item->hasProperty(BLOCKSOLID))){
if(moveCount < 20 && pushItem(item, 1)){
moveCount++;
}
else if(g_game.internalRemoveItem(item) == RET_NOERROR){
++removeCount;
}
}
}
if(removeCount > 0){
g_game.addMagicEffect(tile->getPosition(), NM_ME_PUFF);