//----- Begin of function Nation::think_deal_with_all_enemy -----//
//
// Think about dealing with the enemy. The following are the
// actions a nation can take to deal with its enemies.
//
// >ask our allies to attack the enemy.
//
// >try to break the enemy's existing alliance/friendly treaty with other
// nations - to reduce its alliance strength.
//
// >convert enemy's allies to ours.
//
// >ask other nations to impose trade embargos on the enemy.
//
void Nation::think_deal_with_all_enemy()
{
Nation* nationPtr;
int ourMilitary = military_rank_rating();
int enemyCount = total_enemy_count();
for( int i=1 ; i<=nation_array.size() ; i++ )
{
if( nation_array.is_deleted(i) || nation_recno == i )
continue;
if( get_relation_status(i) != NATION_HOSTILE )
continue;
nationPtr = nation_array[i];
//------- think about eliminating the enemy ------//
int rc = 0;
if( nationPtr->total_population==0 ) // the enemy has no towns left
rc = 1;
if( enemyCount==1 &&
ourMilitary > 100-pref_military_courage/5 ) // 80 to 100
{
int enemyMilitary = nationPtr->military_rank_rating();
if( enemyMilitary < 20 && ai_should_spend_war(enemyMilitary) )
rc = 1;
}
if( rc )
{
if( think_eliminate_enemy_firm(i) )
continue;
if( think_eliminate_enemy_town(i) )
continue;
think_eliminate_enemy_unit(i);
continue;
}
//----- think about dealing with the enemy with diplomacy -----//
think_deal_with_one_enemy(i);
}
}
//--------- Begin of function Nation::think_capture_enemy_town_target --------//
//
// <Town*> capturerTown - our town to capture enemy towns.
//
// Motives for attacking another nation:
//
// 1. Capture towns
// 2. Conquer land
// 3. Defeat enemies
//
Town* Nation::think_capture_enemy_town_target(Town* capturerTown)
{
int townRecno, curRating;
Town* targetTown, *bestTown=NULL;
Firm* firmPtr;
int ourMilitary = military_rank_rating();
Nation* ownNation = nation_array[nation_recno];
int bestRating = -1000;
int hasWar;
int neededCombatLevel=0;
for( townRecno=town_array.size() ; townRecno>0 ; townRecno-- )
{
if( town_array.is_deleted(townRecno) )
continue;
targetTown = town_array[townRecno];
if( targetTown->nation_recno == 0 ||
targetTown->nation_recno == nation_recno )
{
continue;
}
if( targetTown->region_id != capturerTown->region_id )
continue;
//----- if we have already built a camp next to this town -----//
if( targetTown->has_linked_camp(nation_recno, 0) ) //0-count both camps with or without overseers
continue;
//--------- only attack enemies -----------//
NationRelation* nationRelation = get_relation(targetTown->nation_recno);
int rc=0;
if( nationRelation->status == NATION_HOSTILE )
rc = 1;
else if( nationRelation->ai_relation_level < 10 ) // even if the relation is not hostile, if the ai_relation_level is < 10, attack anyway
rc = 1;
else if( nationRelation->status <= NATION_NEUTRAL &&
targetTown->nation_recno == nation_array.max_overall_nation_recno && // if this is our biggest enemy
nationRelation->ai_relation_level < 30 )
{
rc = 1;
}
if( !rc )
continue;
//----- if this town does not have any linked camps, capture this town immediately -----//
if( targetTown->has_linked_camp(targetTown->nation_recno, 0) ) //0-count both camps with or without overseers
return targetTown;
//--- if the enemy is very powerful overall, don't attack it yet ---//
if( nation_array[targetTown->nation_recno]->military_rank_rating() >
ourMilitary * (80+pref_military_courage/2) / 100 )
{
continue;
}
//------ only attack if we have enough money to support the war ----//
if( !ai_should_spend_war( nation_array[targetTown->nation_recno]->military_rank_rating() ) )
continue;
//-------------------------------------------------------//
int townCombatLevel = enemy_town_combat_level(targetTown, 1, hasWar); // 1-return a rating if there is war with the town
if( townCombatLevel == -1 ) // do not attack this town because a battle is already going on
continue;
//------- calculate the rating --------------//
curRating = world.distance_rating(capturerTown->center_x, capturerTown->center_y,
targetTown->center_x, targetTown->center_y);
curRating -= townCombatLevel/10;
curRating -= targetTown->average_loyalty();
curRating += targetTown->population; // put a preference on capturing villages with large population
//----- the power of between the nation also affect the rating ----//
curRating += 2 * (ourMilitary - nation_array[targetTown->nation_recno]->military_rank_rating());
//-- AI Aggressive is set above Low, than the AI will try to capture the player's town first ---//
if( !targetTown->ai_town )
{
if( game.game_mode == GAME_TUTORIAL ) // next attack the player in a tutorial game
{
continue;
}
else
{
switch( config.ai_aggressiveness )
{
case OPTION_MODERATE:
curRating += 100;
break;
case OPTION_HIGH:
curRating += 300;
break;
case OPTION_VERY_HIGH:
curRating += 500;
break;
}
}
}
//--- if there are mines linked to this town, increase its rating ---//
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 )
continue;
if( firmPtr->firm_id == FIRM_MINE )
{
//--- if this mine's raw materials is one that we don't have --//
if( raw_count_array[ ((FirmMine*)firmPtr)->raw_id-1 ]==0 )
curRating += 150 * (int) ((FirmMine*)firmPtr)->reserve_qty / MAX_RAW_RESERVE_QTY;
}
}
//--- more linked towns increase the attractiveness rating ---//
curRating += targetTown->linked_firm_count*5;
//-------- compare with the current best rating ---------//
if( curRating > bestRating )
{
bestRating = curRating;
bestTown = targetTown;
neededCombatLevel = townCombatLevel;
}
}
return bestTown;
}
//----- Begin of function Nation::consider_cease_war -----//
//
// This function is shared by think_request_cease_war().
//
int Nation::consider_cease_war(int withNationRecno)
{
NationRelation* nationRelation = get_relation(withNationRecno);
if( nationRelation->status != RELATION_HOSTILE )
return -1; // -1 means don't reply
//---- if we are attacking the nation, don't cease fire ----//
if( ai_attack_target_nation_recno == withNationRecno )
return -1;
//---- if we are planning to capture the enemy's town ---//
if( ai_capture_enemy_town_recno &&
!town_array.is_deleted(ai_capture_enemy_town_recno) &&
town_array[ai_capture_enemy_town_recno]->nation_recno == withNationRecno )
{
return -1;
}
//--- don't cease fire too soon after a war is declared ---//
if( info.game_date < nationRelation->last_change_status_date + 60 + (100-pref_peacefulness) ) // more peaceful nation may cease fire sooner (but the minimum is 60 days).
return -1;
//------ if we're run short of money for war -----//
Nation* withNation = nation_array[withNationRecno];
if( !ai_should_spend_war(withNation->military_rank_rating(), 1) ) // if we shouldn't spend any more on war, then return 1
return 1;
//------------------------------------------------//
int curRating = consider_alliance_rating(withNationRecno);
//------------------------------------//
//
// Tend to be easilier to accept cease-fire if this nation's
// military strength is weak.
//
// If the nation's peacefulness concern is high, it will
// also be more likely to accept cease-fire.
//
//-------------------------------------//
//--- if the enemy is more power than us, tend more to request cease-fire ---//
curRating += total_enemy_military() - military_rank_rating();
curRating += ai_trade_with_rating(withNationRecno) * (100+pref_trading_tendency) / 300; // when we have excessive supply, we may want to cease-fire with our enemy
curRating -= (military_rank_rating()-50)/2; // if our military ranking is high, we may like to continue the war, otherwise the nation should try to cease-fire
curRating -= nationRelation->started_war_on_us_count*10; // the number of times this nation has started a war with us, the higher the number, the more unlikely we will accept cease-fire
int acceptRating = pref_peacefulness/4;
return curRating - acceptRating;
}
