//--------- Begin of function Nation::attack_enemy_town_defense --------//
//
// Attack enemy's defending forces on the target town.
//
// <Town*> targetTown - the pointer to the target town.
// [int] useAllCamp - whether use troops in all camps to attack the enemy town
// (default: 0)
//
// return: <int> 1 - a troop has been sent to attack the target.
// 0 - we don't have sufficient troops for attacking the target.
// -1 - no defense on the target town, no attacking is needed.
//
int Nation::attack_enemy_town_defense(Town* targetTown, int useAllCamp)
{
err_when( targetTown->nation_recno == nation_recno ); // cannot attack itself
if( targetTown->nation_recno == 0 )
return -1;
//--- if there are any command bases linked to the town, attack them first ---//
int campCombatLevel, maxCampCombatLevel= -1;
Firm *firmPtr, *bestTargetFirm=NULL;
for( int i=targetTown->linked_firm_count-1 ; i>=0 ; i-- )
{
firmPtr = firm_array[ targetTown->linked_firm_array[i] ];
if( firmPtr->nation_recno == targetTown->nation_recno &&
firmPtr->firm_id == FIRM_CAMP )
{
campCombatLevel = ((FirmCamp*)firmPtr)->total_combat_level();
if( campCombatLevel > maxCampCombatLevel )
{
maxCampCombatLevel = campCombatLevel;
bestTargetFirm = firmPtr;
}
}
}
//----- get the defense combat level of the mobile units around the town ----//
int hasWar;
int townMobileCombatLevel = mobile_defense_combat_level(targetTown->center_x, targetTown->center_y, targetTown->nation_recno, 0, hasWar);
int totalDefenseCombatLevel = maxCampCombatLevel + townMobileCombatLevel;
//----------------------------------------//
if( bestTargetFirm )
{
Nation* targetNation = nation_array[bestTargetFirm->nation_recno];
if( targetNation->is_at_war() ) // use all camps force if the nation is at war
useAllCamp = 1;
return ai_attack_target(bestTargetFirm->loc_x1, bestTargetFirm->loc_y1, totalDefenseCombatLevel,
0, 0, 0, 0, useAllCamp );
}
else
{
//--- if there are any mobile defense force around the town ----//
if( townMobileCombatLevel > 0 )
return ai_attack_target(targetTown->center_x, targetTown->center_y, totalDefenseCombatLevel, 0, 1 ); // 1-just all move there and wait for the units to attack the enemies automatically
}
return -1;
}
//----- Begin of function Nation::think_eliminate_enemy_unit -----//
//
// This function is called to eliminate remaining enemy firms
// when all enemy towns have been destroyed.
//
int Nation::think_eliminate_enemy_unit(int enemyNationRecno)
{
Unit *unitPtr;
int hasWar;
for( int i=unit_array.size() ; i>0 ; i-- )
{
if( unit_array.is_deleted(i) )
continue;
unitPtr = unit_array[i];
if( unitPtr->nation_recno != enemyNationRecno )
continue;
if( !unitPtr->is_visible() || unitPtr->mobile_type != UNIT_LAND ) // only deal with land units now
continue;
//--- only attack if we have any base town in the enemy unit's region ---//
if( base_town_count_in_region(unitPtr->region_id()) == 0 )
continue;
//----- take into account of the mobile units around this town -----//
int mobileCombatLevel = mobile_defense_combat_level(unitPtr->next_x_loc(), unitPtr->next_y_loc(), unitPtr->nation_recno, 1, hasWar);
if( mobileCombatLevel == -1 ) // do not attack this town because a battle is already going on
continue;
return ai_attack_target(unitPtr->next_x_loc(), unitPtr->next_y_loc(), mobileCombatLevel + (int) unitPtr->unit_power());
}
return 0;
}
//----- Begin of function Nation::think_attack_enemy_firm -----//
//
// Think about attacking a specific type of firm of a specific enemy.
//
int Nation::think_attack_enemy_firm(int enemyNationRecno, int firmId)
{
if( !largest_town_recno )
return 0;
Town* ourLargestTown = town_array[largest_town_recno];
Nation *nationPtr = nation_array[enemyNationRecno];
Firm *firmPtr, *targetFirm=NULL;
int curRating, bestRating=0, targetCombatLevel, hasWar;
for( int i=firm_array.size() ; i>0 ; i-- )
{
if( firm_array.is_deleted(i) )
continue;
firmPtr = firm_array[i];
if( firmPtr->firm_id != firmId ||
firmPtr->nation_recno != enemyNationRecno )
{
continue;
}
int combatLevel = enemy_firm_combat_level(firmPtr, 1, hasWar);
if( combatLevel==0 ) // no protection with this mine
{
targetFirm = firmPtr;
targetCombatLevel = combatLevel;
break;
}
curRating = world.distance_rating( firmPtr->center_x, firmPtr->center_y,
ourLargestTown->center_x, ourLargestTown->center_y );
curRating += 1000 - combatLevel/5;
if( curRating > bestRating )
{
bestRating = curRating;
targetFirm = firmPtr;
targetCombatLevel = combatLevel;
}
}
if( !targetFirm )
return 0;
//---------------------------------------------//
int useAllCamp=1;
return ai_attack_target( targetFirm->loc_x1, targetFirm->loc_y1,
targetCombatLevel, 0, 0, 0, 0, useAllCamp );
}
int Nation::think_attack_units_standing_on_mine()
{
for( int i=site_array.size() ; i>0 ; i-- )
{
if( site_array.is_deleted(i) )
continue;
Site* sitePtr = site_array[i];
if( sitePtr->site_type != SITE_RAW )
continue;
Location* siteLocPtr = world.get_loc(sitePtr->map_x_loc, sitePtr->map_y_loc);
if( world.can_build_firm(sitePtr->map_x_loc, sitePtr->map_y_loc, FIRM_MINE) )
continue;
//----- attack enemy units standing on this location ----//
for( int yLoc=sitePtr->map_y_loc ; yLoc<=sitePtr->map_y2 ; yLoc++ )
{
for( int xLoc=sitePtr->map_x_loc ; xLoc<=sitePtr->map_x2 ; xLoc++ )
{
Location* locPtr = world.get_loc(xLoc, yLoc);
int unitRecno = locPtr->unit_recno('L');
if( !unitRecno )
continue;
if( unit_array[unitRecno]->cur_action != SPRITE_IDLE ) // only attack units that stand on the mine
continue;
int nationRecno = unit_array[unitRecno]->nation_recno;
if( nationRecno == nation_recno )
continue;
//--- attack the units standing on the mine if the units' relationship <= Neutral ---//
if( get_relation_status(nationRecno) <= RELATION_NEUTRAL )
{
ai_attack_target( xLoc, yLoc, unit_array[unitRecno]->obj_power(), 0, 0, 0, 0, 1 ); // 1-use all camps
return 1;
}
}
}
}
return 0;
}
int Nation::think_attack_monster()
{
if( config.monster_type == OPTION_MONSTER_NONE ) // no monsters in the game
return 0;
//--- if the AI has run out of money and is currently cheating, it will have a urgent need to attack monsters to get money ---//
int useAllCamp = income_365days(INCOME_CHEAT) > 0;
if( !useAllCamp ) // use all camps to attack the monster
{
if( !is_at_war() )
{
if( cash < 500 && military_rank_rating() >= 75-pref_attack_monster/4 ) // 50 to 75
useAllCamp = 1 ;
}
}
if( !useAllCamp )
{
if( military_rank_rating() < 50-pref_attack_monster/4 ) // don't attack if the military strength is too low, 25 to 50
return 0;
}
//------- select a monster target ---------//
int targetCombatLevel;
int targetFirmRecno = think_monster_target(targetCombatLevel);
if( !targetFirmRecno )
return 0;
targetCombatLevel = targetCombatLevel * 150 / 100; // X 150%
//--- we need to use veteran soldiers to attack powerful monsters ---//
FirmMonster* targetFirm = (FirmMonster*) firm_array[targetFirmRecno];
int monsterLevel = monster_res[targetFirm->monster_id]->level;
int attackerMinCombatLevel = 0;
if( targetCombatLevel > 100 ) // if the nation's cash runs very low, it will attack anyway
attackerMinCombatLevel = 20 + monsterLevel*3;
//--- call ai_attack_target() to attack the target town ---//
return ai_attack_target(targetFirm->loc_x1, targetFirm->loc_y1, targetCombatLevel, 0, 0, attackerMinCombatLevel, 0, useAllCamp );
}
//----- Begin of function Nation::think_eliminate_enemy_firm -----//
//
// This function is called to eliminate remaining enemy firms
// when all enemy towns have been destroyed.
//
int Nation::think_eliminate_enemy_firm(int enemyNationRecno)
{
//---- look for enemy firms to attack ----//
int hasWar;
Firm *firmPtr;
for( int i=firm_array.size() ; i>0 ; i-- )
{
if( firm_array.is_deleted(i) )
continue;
firmPtr = firm_array[i];
if( firmPtr->nation_recno != enemyNationRecno )
continue;
//--- only attack if we have any base town in the enemy firm's region ---//
if( base_town_count_in_region(firmPtr->region_id)==0 )
continue;
//----- take into account of the mobile units around this town -----//
int mobileCombatLevel = mobile_defense_combat_level(firmPtr->center_x, firmPtr->center_y, firmPtr->nation_recno, 1, hasWar);
if( mobileCombatLevel == -1 ) // do not attack this town because a battle is already going on
continue;
//---- calculate the combat level of this target firm ----//
int firmCombatLevel;
if( firmPtr->firm_id == FIRM_CAMP ) // other civilian firms
firmCombatLevel = ((FirmCamp*)firmPtr)->total_combat_level();
else
firmCombatLevel = firmPtr->worker_count * 10; // civilian firms have very low combat level
return ai_attack_target(firmPtr->loc_x1, firmPtr->loc_y1, mobileCombatLevel + firmCombatLevel);
}
return 0;
}
//----- Begin of function Nation::think_eliminate_enemy_town -----//
//
// This function is called to eliminate remaining enemy firms
// when all enemy towns have been destroyed.
//
int Nation::think_eliminate_enemy_town(int enemyNationRecno)
{
//---- look for enemy firms to attack ----//
int hasWar;
Town *townPtr;
for( int i=town_array.size() ; i>0 ; i-- )
{
if( town_array.is_deleted(i) )
continue;
townPtr = town_array[i];
if( townPtr->nation_recno != enemyNationRecno )
continue;
//--- only attack if we have any base town in the enemy town's region ---//
if( base_town_count_in_region(townPtr->region_id)==0 )
continue;
//----- take into account of the mobile units around this town -----//
int mobileCombatLevel = mobile_defense_combat_level(townPtr->center_x, townPtr->center_y, townPtr->nation_recno, 1, hasWar);
if( mobileCombatLevel == -1 ) // do not attack this town because a battle is already going on
continue;
//---- calculate the combat level of this target town ----//
int townCombatLevel = townPtr->protection_available();
return ai_attack_target(townPtr->loc_x1, townPtr->loc_y1, mobileCombatLevel + townCombatLevel);
}
return 0;
}
//--------- Begin of function Nation::think_destroy_raw_site_guard --------//
//
int Nation::think_destroy_raw_site_guard()
{
Site* sitePtr;
Location* locPtr;
Unit* unitPtr;
for( int i=site_array.size() ; i>0 ; i-- )
{
if( site_array.is_deleted(i) )
continue;
sitePtr = site_array[i];
//--- if there is already a mine built on this raw site ---//
if( sitePtr->has_mine )
continue;
//----- if there is a unit standing on this site -----//
locPtr = world.get_loc( sitePtr->map_x_loc, sitePtr->map_y_loc );
if( !locPtr->unit_recno(UNIT_LAND) )
continue;
unitPtr = unit_array[ locPtr->unit_recno(UNIT_LAND) ];
if( unitPtr->cur_action != SPRITE_IDLE ) // only attack if this unit is idle
continue;
if( unitPtr->nation_recno == nation_recno ) // don't attack our own units
continue;
//------ check if we have a presence in this region ----//
if( is_human() && base_town_count_in_region(sitePtr->region_id) == 0 )
continue;
//------ check the relationship with this unit ------//
//
// If we are friendly with this nation, don't attack it.
//
//---------------------------------------------------//
if( get_relation_status(unitPtr->nation_recno) >= RELATION_FRIENDLY )
continue;
//--------- attack the enemy unit ---------//
int hasWar;
int enemyCombatLevel = mobile_defense_combat_level( sitePtr->map_x_loc,
sitePtr->map_y_loc, unitPtr->nation_recno, 1, hasWar );
if( enemyCombatLevel == - 1 ) // a war is going on here, don't attack this target
continue;
if( ai_attack_target(sitePtr->map_x_loc, sitePtr->map_y_loc, enemyCombatLevel, 0, 0, 0, 0, 1) ) // 1-use all camps
return 1;
}
return 0;
}
//--------- Begin of function Nation::ai_attack_unit_in_area --------//
//
// AI attacks all units that are not friendly to us within the given area.
//
// <int> xLoc1, yLoc1, xLoc2, yLoc2 - coordination of the area.
//
void Nation::ai_attack_unit_in_area(int xLoc1, int yLoc1, int xLoc2, int yLoc2)
{
int enemyXLoc, enemyYLoc, enemyCombatLevel=0;
int enemyStatus = RELATION_FRIENDLY;
Location* locPtr;
Unit* unitPtr;
//--------------------------------------------------//
for( int yLoc=yLoc1 ; yLoc<=yLoc2 ; yLoc++ )
{
for( int xLoc=xLoc1 ; xLoc<=xLoc2 ; xLoc++ )
{
locPtr = world.get_loc(xLoc, yLoc);
if( !locPtr->unit_recno(UNIT_LAND) )
continue;
unitPtr = unit_array[ locPtr->unit_recno(UNIT_LAND) ];
//--- if there is an idle unit on the mine building site ---//
if( unitPtr->cur_action != SPRITE_IDLE || unitPtr->nation_recno==0 )
continue;
//----- if this is our spy cloaked in another nation, reveal its true identity -----//
if( unitPtr->nation_recno != nation_recno &&
unitPtr->true_nation_recno() == nation_recno )
{
unitPtr->spy_change_nation(nation_recno, COMMAND_AI);
}
//--- if this is our own unit, order him to stay out of the building site ---//
if( unitPtr->nation_recno == nation_recno )
{
unitPtr->think_normal_human_action(); // send the unit to a firm or a town
}
else //--- if it is an enemy unit, attack it ------//
{
int nationStatus = get_relation_status(unitPtr->nation_recno);
if( nationStatus < enemyStatus ) // if the status is worse than the current target
{
enemyXLoc = xLoc;
enemyYLoc = yLoc;
enemyStatus = nationStatus;
enemyCombatLevel += (int) unitPtr->obj_power();
}
}
}
}
//--- if there are enemies on our firm building site, attack them ---//
if( enemyCombatLevel )
{
ai_attack_target( enemyXLoc, enemyYLoc, enemyCombatLevel );
}
}
//----- Begin of function Nation::think_against_mine_monopoly -----//
//
int Nation::think_against_mine_monopoly()
{
//-- only think this after the game has been running for at least one year --//
if( config.ai_aggressiveness < OPTION_HIGH ) // only attack if aggressiveness >= high
return 0;
if( info.game_date - info.game_start_date > 365 )
return 0;
if( profit_365days() > 0 ) // if we are making a profit, don't attack
return 0;
//-- for high aggressiveness, it will check cash before attack, for very high aggressiveness, it won't check cash before attack ---//
if( config.ai_aggressiveness < OPTION_VERY_HIGH ) // only attack if aggressiveness >= high
{
if( cash > 2000 + 1000 * pref_cash_reserve / 100 ) // only attack if we run short of cash
return 0;
}
//--------------------------------------------------------//
if( !largest_town_recno )
return 0;
//--------------------------------------------------//
int baseRegionId = town_array[largest_town_recno]->region_id;
// no region stat (region is too small), don't care
if( !region_array[baseRegionId]->region_stat_id )
return 0;
RegionStat* regionStat = region_array.get_region_stat(baseRegionId);
//---- if we already have a mine in this region ----//
if( regionStat->mine_nation_count_array[nation_recno-1] > 0 )
return 0;
//----- if there is no mine in this region -----//
if( regionStat->raw_count == 0 )
return 0;
//----- if enemies have occupied all mines -----//
int mineCount, totalMineCount=0;
int curRating, bestRating=0, targetNationRecno=0;
int i;
for( i=nation_array.size() ; i>0 ; i-- )
{
if( nation_array.is_deleted(i) )
continue;
//------ only deal with human players ------//
if( nation_array[i]->is_ai() || i==nation_recno )
continue;
//------------------------------------------//
mineCount = regionStat->mine_nation_count_array[i-1];
totalMineCount += mineCount;
curRating = mineCount * 100
- get_relation(i)->ai_relation_level
- trade_rating(i);
if( curRating > bestRating )
{
bestRating = curRating;
targetNationRecno = i;
}
}
if( !targetNationRecno )
return 0;
//--- if the relationship with this nation is still good, don't attack yet, ask for aid first ---//
NationRelation* nationRelation = get_relation(targetNationRecno);
if( nationRelation->ai_relation_level > 30 )
{
int talkId;
if( nationRelation->status >= NATION_FRIENDLY )
talkId = TALK_DEMAND_AID;
else
talkId = TALK_DEMAND_TRIBUTE;
if( should_diplomacy_retry(talkId, targetNationRecno) )
{
static short aidAmountArray[] = { 500, 1000, 2000 };
int aidAmount = aidAmountArray[misc.random(3)];
talk_res.ai_send_talk_msg(targetNationRecno, nation_recno, talkId, aidAmount);
}
return 0;
}
//------- attack one of the target enemy's mines -------//
Firm* firmPtr;
for( i=firm_array.size() ; i>0 ; i-- )
{
if( firm_array.is_deleted(i) )
continue;
firmPtr = firm_array[i];
if( firmPtr->firm_id != FIRM_MINE ||
firmPtr->nation_recno != targetNationRecno ||
firmPtr->region_id != baseRegionId )
{
continue;
}
//--------------------------------------------//
int hasWar;
int targetCombatLevel = enemy_firm_combat_level(firmPtr, 1, hasWar);
return ai_attack_target( firmPtr->loc_x1, firmPtr->loc_y1,
targetCombatLevel, 0, 0, 0, 0, 1 ); // 1-use all camps
}
return 0;
}
void Nation::think_capturing_enemy_town()
{
if( !ai_capture_enemy_town_recno )
return;
if( town_array.is_deleted(ai_capture_enemy_town_recno) ||
town_array[ai_capture_enemy_town_recno]->nation_recno == nation_recno ) // this town has been captured already
{
ai_capture_enemy_town_recno = 0;
return;
}
//--- check the enemy's mobile defense combat level around the town ---//
Town* targetTown = town_array[ai_capture_enemy_town_recno];
int hasWar;
int mobileCombatLevel = mobile_defense_combat_level(targetTown->center_x, targetTown->center_y, targetTown->nation_recno, 0, hasWar); // 0-don't return immediately even if there is war around this town
//---- if we haven't started attacking the town yet -----//
if( !ai_capture_enemy_town_start_attack_date )
{
if( hasWar==2 ) // we are at war with the nation now
ai_capture_enemy_town_start_attack_date = info.game_date;
if( info.game_date > ai_capture_enemy_town_plan_date + 90 ) // when 3 months have gone and there still hasn't been any attack on the town, there must be something bad happened to our troop, cancel the entire action
ai_capture_enemy_town_recno = 0;
return; // do nothing if the attack hasn't started yet
}
//--------- check if we need reinforcement --------//
//-----------------------------------------------------------//
// Check how long we have started attacking because only
// when the it has been started for a while, our force
// will reach the target and the offensive and defensive force
// total can be calculated accurately.
//-----------------------------------------------------------//
if( info.game_date - ai_capture_enemy_town_start_attack_date >= 15 )
{
//-------- check if we need any reinforcement --------//
if( mobileCombatLevel > 0 && hasWar==2 ) // we are still in war with the enemy
{
ai_attack_target(targetTown->center_x, targetTown->center_y, mobileCombatLevel, 0, 1 ); // 1-just all move there and wait for the units to attack the enemies automatically
return;
}
}
//----- there is currently no war at the town -----//
//
// - either we are defeated or we have destroyed their command base.
//
//--------------------------------------------------//
if( hasWar != 2 )
{
//---- attack enemy's defending forces on the target town ----//
int rc = attack_enemy_town_defense(targetTown, ai_capture_enemy_town_use_all_camp);
if( rc == 1 ) // 1 means a troop has been sent to attack the town
{
ai_capture_enemy_town_start_attack_date = 0;
return;
}
//---------- reset the vars --------//
ai_capture_enemy_town_recno = 0;
ai_capture_enemy_town_start_attack_date = 0;
//--------- other situations --------//
if( rc == -1 ) // -1 means no defense on the target town, no attacking is needed.
{
start_capture( targetTown->town_recno ); // call AI functions in OAI_CAPT.CPP to capture the town
}
// 0 means we don't have enough troop to attack the enemy
}
}
//----- Begin of function Nation::consider_military_aid -----//
//
int Nation::consider_military_aid(TalkMsg* talkMsg)
{
Nation* fromNation = nation_array[talkMsg->from_nation_recno];
NationRelation* fromRelation = get_relation(talkMsg->from_nation_recno);
//----- don't aid too frequently ------//
if( info.game_date < fromRelation->last_military_aid_date + 200 - pref_allying_tendency )
return 0;
//------- only when the AI relation >= 60 --------//
if( fromRelation->ai_relation_level < 60 )
return 0;
//--- if the requesting nation is not at war now ----//
if( !fromNation->is_at_war() )
return 0;
//---- can't aid if we are at war ourselves -----//
if( is_at_war() )
return 0;
//--- if the nation is having a financial difficulty, it won't agree ---//
if( cash < 2000 * pref_cash_reserve / 100 )
return 0;
//----- can't aid if we are too weak ourselves ---//
if( ai_general_count*10 + total_human_count + total_monster_count
< 100-pref_military_courage/2 )
{
return 0;
}
//----- see what units are attacking the nation -----//
if( unit_array.is_deleted(fromNation->last_attacker_obj_recno) )
return 0;
BaseObj* baseObj = base_obj_array[ fromNation->last_attacker_obj_recno ];
if( baseObj->nation_recno == nation_recno ) // if it's our own units
return 0;
if( baseObj->nation_recno == 0 )
return 0;
if( !baseObj->is_visible() )
return 0;
//------ only attack if it's a common enemy to us and our ally -----//
if( get_relation(baseObj->nation_recno)->status != RELATION_HOSTILE )
return 0;
//------- calculate the combat level of the target units there ------//
int hasWar;
int targetCombatLevel = mobile_defense_combat_level( baseObj->obj_loc_x1(), baseObj->obj_loc_y1(),
baseObj->nation_recno, 0, hasWar );
if( ai_attack_target(baseObj->obj_loc_x1(), baseObj->obj_loc_y1(),
targetCombatLevel, 0, 1 ) ) //0-not defense mode, 1-just move to flag
{
fromRelation->last_military_aid_date = info.game_date;
return 1;
}
return 0;
}