//----- Begin of function Nation::consider_trade_embargo -----//
//
int Nation::consider_trade_embargo(TalkMsg* talkMsg)
{
int fromRelationRating = ai_overall_relation_rating(talkMsg->from_nation_recno);
int againstRelationRating = ai_overall_relation_rating(talkMsg->talk_para1);
NationRelation* fromRelation = get_relation(talkMsg->from_nation_recno);
NationRelation* againstRelation = get_relation(talkMsg->talk_para1);
//--- if we don't have a good enough relation with the requesting nation, turn down the request ---//
if( fromRelation->good_relation_duration_rating < 5 )
return 0;
//--- if we are more friendly with the against nation than the requesting nation, turn down the request ---//
if( againstRelation->good_relation_duration_rating >
fromRelation->good_relation_duration_rating )
{
return 0;
}
//--- if we have a large trade with the against nation or have a larger trade with the against nation than the requesting nation ---//
int fromTrade = trade_rating(talkMsg->from_nation_recno);
int againstTrade = trade_rating(talkMsg->talk_para1);
if( againstTrade > 40 ||
( againstTrade > 10 && againstTrade - fromTrade > 15 ) )
{
return 0;
}
//--- if the nation is having a financial difficulty, it won't agree ---//
if( cash < 2000 * pref_cash_reserve / 100 )
return 0;
//--------------------------------------------//
int acceptRating = 75;
//--- it won't declare war with a friendly or allied nation easily ---//
if( againstRelation->status >= RELATION_FRIENDLY ) // no need to handle RELATION_ALLIANCE separately as ai_overall_relation_relation() has already taken it into account
acceptRating += 100;
return fromRelationRating - againstRelationRating > acceptRating;
}
//--------- Begin of function Nation::ai_improve_relation --------//
//
// This function is called once every year.
//
void Nation::ai_improve_relation()
{
NationRelation* nationRelation;
for( int i=nation_array.size() ; i>0 ; i-- )
{
if( nation_array.is_deleted(i) )
continue;
nationRelation = get_relation(i);
if( nationRelation->status == NATION_HOSTILE )
continue;
//--- It improves the AI relation with nations that have trade with us. ---//
change_ai_relation_level( i, trade_rating(i) / 10 );
//--- decrease the started_war_on_us_count once per year, gradually forgiving other nations' wrong doing ---//
if( nationRelation->started_war_on_us_count > 0
&& misc.random(5-pref_forgiveness/20) > 0 )
{
nationRelation->started_war_on_us_count--;
}
}
}
//----- Begin of function Nation::consider_alliance_rating -----//
//
// Return a rating from 0 to 100 for whether this nation should ally
// with the given nation.
//
int Nation::consider_alliance_rating(int nationRecno)
{
Nation* nationPtr = nation_array[nationRecno];
//---- the current relation affect the alliance tendency ---//
NationRelation* nationRelation = get_relation(nationRecno);
int allianceRating = nationRelation->ai_relation_level-20;
//--- if the nation has a bad record of starting wars with us before, decrease the rating ---//
allianceRating -= nationRelation->started_war_on_us_count * 20;
//------ add the trade rating -------//
int tradeRating = trade_rating(nationRecno) + // existing trade amount
ai_trade_with_rating(nationRecno)/2; // possible trade
allianceRating += tradeRating;
//---- if the nation's power is larger than us, it's a plus ----//
int powerRating = nationPtr->military_rank_rating() - military_rank_rating(); // if the nation's power is larger than ours, it's good to form treaty with them
if( powerRating > 0 )
allianceRating += powerRating;
return allianceRating;
}
//----- Begin of function Nation::ai_overall_relation_rating -----//
//
// Return the overall relation rating of this nation with the
// specific nation.
//
int Nation::ai_overall_relation_rating(int withNationRecno)
{
NationRelation* nationRelation = get_relation(withNationRecno);
Nation* nationPtr = nation_array[withNationRecno];
int overallRating = nationRelation->ai_relation_level +
(int) nationRelation->good_relation_duration_rating +
(int) nationPtr->reputation +
nationPtr->military_rank_rating() +
trade_rating(withNationRecno) +
ai_trade_with_rating(withNationRecno)/2 +
nationPtr->total_alliance_military();
return overallRating;
}
//----- Begin of function Nation::ai_should_attack_friendly -----//
//
// This function returns whether this nation should attack
// the given friendly nation.
//
// <int> friendlyNationRecno - the nation recno of the friendly nation.
// <int> attackTemptation - a rating from 0 to 100 indicating
// temptation of attacking the target.
//
int Nation::ai_should_attack_friendly(int friendlyNationRecno, int attackTemptation)
{
Nation *friendlyNation = nation_array[friendlyNationRecno];
NationRelation *nationRelation = get_relation(friendlyNationRecno);
//--- don't change terminate treaty too soon ---//
if( info.game_date < nationRelation->last_change_status_date+60+pref_honesty/2 ) // only after 60 to 110 days
return 0;
//------------------------------------------------//
int resistanceRating = friendlyNation->military_rank_rating()
- military_rank_rating();
resistanceRating += nationRelation->ai_relation_level - 50;
resistanceRating += trade_rating(friendlyNationRecno);
return attackTemptation > resistanceRating;
}
//----- Begin of function Nation::think_demand_tribute_aid -----//
//
// Demand tribute when the nation's economy is good and its
// military is weak.
//
int Nation::think_demand_tribute_aid()
{
if( info.game_date < info.game_start_date + 180 + nation_recno*50 ) // don't ask for tribute too soon, as in the beginning, the ranking are all the same for all nations
return 0;
//--------------------------------------//
Nation* nationPtr;
int totalNation=nation_array.size();
int nationRecno=m.random(totalNation)+1;
int curRating, requestRating;
int talkId;
int ourMilitary = military_rank_rating();
int ourEconomy = economic_rank_rating();
for( int i=totalNation ; i>0 ; i-- )
{
if( ++nationRecno > totalNation )
nationRecno = 1;
if( nation_array.is_deleted(nationRecno) || nationRecno==nation_recno )
continue;
nationPtr = nation_array[nationRecno];
//-- only demand tribute from non-friendly nations --//
if( get_relation(nationRecno)->status <= RELATION_NEUTRAL )
talkId = TALK_DEMAND_TRIBUTE;
else
talkId = TALK_DEMAND_AID;
//-----------------------------------------------//
float fixedExpense = fixed_expense_365days();
if( talkId == TALK_DEMAND_TRIBUTE )
{
if( !should_diplomacy_retry(talkId, nationRecno) )
continue;
curRating = ourMilitary - nationPtr->military_rank_rating();
//---- if this is a Fryhtan nation, the tendency to request tribute is higher -----//
if( is_monster() && nationPtr->is_human() ) // and the target is a human nation
{
curRating *= 2;
//-- if we are running low of live points, it's time to kill somebody --//
if( live_points < 500 * (100+pref_live_points_reserve) / 100 )
curRating *= 2;
}
if( curRating < 0 )
continue;
//----------------------------------------------//
//
// Some nation will actually consider the ability
// of the target nation to pay tribute, so nation
// will not and just ask anyway.
//
//----------------------------------------------//
if( pref_economic_development > 50 )
{
int addRating = nationPtr->economic_rank_rating()-ourEconomy;
if( addRating > 0 )
curRating += addRating;
}
requestRating = 20 + trade_rating(nationRecno)/2 +
(100-pref_peacefulness)/3;
if( cash < fixedExpense && fixedExpense != 0 )
requestRating -= int( (float) requestRating * cash / fixedExpense);
}
else
{
if( cash >= fixedExpense )
continue;
if( cash > fixedExpense * (50+pref_cash_reserve) / 300 && // if the nation is runing short of cash, don't wait a while until next retry, retry immediately
!should_diplomacy_retry(talkId, nationRecno) )
{
continue;
}
//----- only ask for aid when the nation is short of cash ----//
curRating = (ourMilitary - nationPtr->military_rank_rating())/2 +
( nationPtr->economic_rank_rating()-ourEconomy );
requestRating = 20 + 50 * (int)(cash / fixedExpense);
}
//----- if the target is a human player's nation -----//
if( !nationPtr->is_ai() )
{
switch( config.ai_aggressiveness )
{
case OPTION_NONE:
requestRating += 60; // don't go against the player too easily
break;
case OPTION_LOW:
requestRating += 40; // don't go against the player too easily
break;
case OPTION_HIGH:
requestRating -= 20;
break;
case OPTION_VERY_HIGH:
requestRating -= 40;
break;
}
//--- if the nation has plenty of cash, demand from it ----//
if( nationPtr->cash > cash && config.ai_aggressiveness >= OPTION_HIGH )
{
requestRating -= (int) (nationPtr->cash - cash)/500;
}
}
//--------------------------------------//
if( curRating > requestRating )
{
int tributeAmount;
if( curRating - requestRating > 120 )
tributeAmount = 4000;
else if( curRating - requestRating > 80 )
tributeAmount = 3000;
else if( curRating - requestRating > 40 )
tributeAmount = 2000;
else if( curRating - requestRating > 20 )
tributeAmount = 1000;
else
tributeAmount = 500;
//------ stop in here if in tutorial mode -----//
if( game.game_mode != GAME_TUTORIAL )
{
cash += tributeAmount;
return 0;
}
talk_res.ai_send_talk_msg(nationRecno, nation_recno, talkId, tributeAmount);
return 1;
}
}
return 0;
}
//----- Begin of function Nation::think_declare_war -----//
//
int Nation::think_declare_war()
{
NationRelation* nationRelation;
int rc=0;
//---- don't declare a new war if we already has enemies ---//
int i;
for( i=1 ; i<=nation_array.size() ; i++ )
{
if( nation_array.is_deleted(i) || i==nation_recno )
continue;
if( get_relation(i)->status == RELATION_HOSTILE )
return 0;
}
//------------------------------------------------//
int targetStrength, minStrength=0x1000, bestTargetNation=0;
for( i=1 ; i<=nation_array.size() ; i++ )
{
if( nation_array.is_deleted(i) || i==nation_recno )
continue;
nationRelation = get_relation(i);
if( !nationRelation->has_contact )
continue;
if( nationRelation->status == RELATION_HOSTILE ) // already at war
continue;
if( nationRelation->ai_relation_level >= 10 )
continue;
if( !ai_should_spend( 100-trade_rating(i) ) ) // if trade_rating is 0, importanceRating will be 100, if trade_rating is 100, importanceRating will be 0
continue;
//----------------------------------------//
Nation* targetNation = nation_array[i];
targetStrength = targetNation->military_rank_rating() +
targetNation->population_rank_rating()/2 +
targetNation->economic_rank_rating()/3;
if( targetStrength < minStrength )
{
minStrength = targetStrength;
bestTargetNation = i;
}
}
//------------------------------------------//
if( bestTargetNation )
{
if( should_diplomacy_retry(TALK_DECLARE_WAR, bestTargetNation) )
{
talk_res.ai_send_talk_msg(bestTargetNation, nation_recno, TALK_DECLARE_WAR);
return 1;
}
}
return 0;
}
//----- Begin of function Nation::think_end_treaty -----//
//
int Nation::think_end_treaty()
{
if( pref_honesty < 30 ) // never formally end a treaty if the honesty is < 30
return 0;
Nation* nationPtr;
NationRelation* nationRelation;
for( int i=1 ; i<=nation_array.size() ; i++ )
{
if( nation_array.is_deleted(i) || i==nation_recno )
continue;
nationRelation = get_relation(i);
if( nationRelation->status < RELATION_FRIENDLY )
continue;
if( nationRelation->ai_secret_attack ||
( nationRelation->ai_relation_level < 30 && trade_rating(i) < 50 ) )
{
//--- don't change terminate treaty too soon ---//
if( info.game_date < nationRelation->last_change_status_date+60+pref_honesty/2 ) // only after 60 to 110 days
continue;
//----------------------------------------//
if( !talk_res.can_send_msg(i, nation_recno, nationRelation->status==RELATION_FRIENDLY ? TALK_END_FRIENDLY_TREATY : TALK_END_ALLIANCE_TREATY) )
continue;
nationPtr = nation_array[i];
//-----------------------------------------//
// What makes it tend to end treaty:
// -higher honesty
// -a larger overall power over the target nation.
//
// If honesty is > 50, if will end treaty
// if its power is equal to the enemy.
//
// If honesty is < 50, if will end treaty
// if its power is larger than the enemy.
//
// If honesty is > 50, if will end treaty
// even if its power is lower than the enemy.
//-----------------------------------------//
if( pref_honesty-50 > nationPtr->overall_rating - overall_rating )
{
if( nationRelation->status == RELATION_FRIENDLY )
talk_res.ai_send_talk_msg(i, nation_recno, TALK_END_FRIENDLY_TREATY);
else
talk_res.ai_send_talk_msg(i, nation_recno, TALK_END_ALLIANCE_TREATY);
return 1;
}
}
}
return 0;
}
//----- 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;
}
//----- Begin of function Nation::think_ally_against_big_enemy -----//
//
// Think about allying against a big enemy
//
int Nation::think_ally_against_big_enemy()
{
if( info.game_date < info.game_start_date + 365 + nation_recno*70 ) // don't ask for tribute too soon, as in the beginning, the ranking are all the same for all nations
return 0;
//---------------------------------------//
int enemyNationRecno = nation_array.max_overall_nation_recno;
if( enemyNationRecno == nation_recno )
return 0;
//-- if AI aggressiveness > high, only deal against the player, but not other kingdoms ---//
if( config.ai_aggressiveness >= OPTION_HIGH )
{
if( nation_array[enemyNationRecno]->is_ai() )
return 0;
}
//-- if AI aggressiveness is low, don't do this against the human player --//
else if( config.ai_aggressiveness == OPTION_LOW )
{
if( !nation_array[enemyNationRecno]->is_ai() )
return 0;
}
//--- increase the ai_relation_level towards other nations except the enemy so we can ally against the enemy ---//
Nation* enemyNation = nation_array[enemyNationRecno];
int incRelationLevel = (100-overall_rank_rating())/10;
int i;
for( i=nation_array.size() ; i>0 ; i-- )
{
if( nation_array.is_deleted(i) )
continue;
if( i==nation_recno || i==enemyNationRecno )
continue;
int thisIncLevel = incRelationLevel * (100-get_relation(i)->ai_relation_level) / 100;
change_ai_relation_level( i, thisIncLevel );
}
//---- don't have all nations doing it the same time ----//
if( misc.random(nation_array.ai_nation_count)==0 )
return 0;
//---- if the trade rating is high, stay war-less with it ----//
if( trade_rating(enemyNationRecno) +
ai_trade_with_rating(enemyNationRecno) > 100 - pref_trading_tendency/3 )
{
return 0;
}
//---- if the nation relation level is still high, then request aid/tribute ----//
NationRelation* nationRelation = get_relation(enemyNationRecno);
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, enemyNationRecno) )
{
static short aidAmountArray[] = { 500, 1000, 2000 };
int aidAmount = aidAmountArray[misc.random(3)];
talk_res.ai_send_talk_msg(enemyNationRecno, nation_recno, talkId, aidAmount);
}
return 0;
}
//-------------------------------------//
Nation* nationPtr;
NationRelation *ourNationRelation, *enemyNationRelation;
for( i=nation_array.size() ; i>0 ; i-- )
{
if( nation_array.is_deleted(i) )
continue;
if( i==nation_recno || i==enemyNationRecno )
continue;
nationPtr = nation_array[i];
ourNationRelation = get_relation(i);
enemyNationRelation = enemyNation->get_relation(i);
}
return 0;
}