// Get the maximum damage unit could receive at this plot in the next turn (update this with CvUnitCombat changes!)
int CvDangerPlotContents::GetDanger(const CvUnit* pUnit, AirActionType iAirAction)
{
if (!m_pPlot || !pUnit)
return 0;
// Air units only take damage from interceptions
if (pUnit->getDomainType() == DOMAIN_AIR)
return GetAirUnitDamage(pUnit, iAirAction);
//simple caching for speedup
SUnitStats unitStats(pUnit);
if (unitStats==m_lastUnit)
return m_lastResult;
//otherwise calculate from scratch
int iPlotDamage = 0;
CvCity* pFriendlyCity = NULL;
if ( m_pPlot->isFriendlyCity(*pUnit,true) )
pFriendlyCity = m_pPlot->getPlotCity();
// Civilians can be captured - unless they would need to be embarked on this plot
if (!pUnit->IsCombatUnit() && pUnit->isNativeDomain(m_pPlot))
{
// If plot contains an enemy unit, mark it as max danger
if (m_pPlot->getBestDefender(NO_PLAYER, pUnit->getOwner(), NULL, true))
{
return MAX_INT;
}
for (DangerUnitVector::iterator it = m_apUnits.begin(); it < m_apUnits.end(); ++it)
{
CvUnit* pAttacker = GET_PLAYER(it->first).getUnit(it->second);
if ( pAttacker && !pAttacker->isDelayedDeath() && !pAttacker->IsDead())
{
// If in a city and the city can be captured, we are in highest danger
if (pFriendlyCity)
{
if (GetDanger(pFriendlyCity) + pFriendlyCity->getDamage() > pFriendlyCity->GetMaxHitPoints())
{
return MAX_INT;
}
}
// Look for a possible plot defender
else
{
IDInfo* pUnitNode = m_pPlot->headUnitNode();
CvUnit* pBestDefender = NULL;
while (pUnitNode != NULL)
{
pBestDefender = ::getUnit(*pUnitNode);
pUnitNode = m_pPlot->nextUnitNode(pUnitNode);
if (pBestDefender && pBestDefender->getOwner() == pUnit->getOwner())
{
//fix endless recursion with stacked embarked civilians: defender must also be able to attack
if (pBestDefender->IsCanDefend() && pBestDefender->IsCanAttack())
{
if (pBestDefender != pUnit)
{
if (pBestDefender->isWaiting() || !(pBestDefender->canMove()))
{
break;
}
}
}
}
pBestDefender = NULL;
}
// If there is a defender and it might be killed, high danger
if (pBestDefender && (pBestDefender->isWaiting() || !pBestDefender->canMove()))
{
if (GetDanger(pBestDefender) > pBestDefender->GetCurrHitPoints())
{
return INT_MAX;
}
}
else if (pBestDefender==NULL)
{
//Civilian could be captured on this tile
return MAX_INT;
}
}
}
}
// Damage from features (citadel)
iPlotDamage += GetDamageFromFeatures(pUnit->getOwner());
iPlotDamage += m_bFlatPlotDamage ? m_pPlot->getTurnDamage(pUnit->ignoreTerrainDamage(), pUnit->ignoreFeatureDamage(), pUnit->extraTerrainDamage(), pUnit->extraFeatureDamage()) : 0;
// Damage from cities
for (DangerCityVector::iterator it = m_apCities.begin(); it < m_apCities.end(); ++it)
{
CvCity* pCity = GET_PLAYER(it->first).getCity(it->second);
if (!pCity || pCity->getTeam() == pUnit->getTeam())
continue;
iPlotDamage += pCity->rangeCombatDamage(pUnit, NULL, false, m_pPlot);
}
//update cache
m_lastUnit = unitStats;
m_lastResult = iPlotDamage;
return iPlotDamage;
}
// Capturing a city with a garrisoned unit destroys the garrisoned unit
if (pFriendlyCity)
{
int iCityDanger = GetDanger(pFriendlyCity, (pUnit->getDomainType() == DOMAIN_LAND ? pUnit : NULL));
if (iCityDanger + pFriendlyCity->getDamage() < pFriendlyCity->GetMaxHitPoints())
{
if (pUnit->CanGarrison())
{
// Reconstruct the amount of damage the garrison would absorb for the city
int iUnitShare = (iCityDanger*2*pUnit->GetMaxHitPoints()) / pFriendlyCity->GetMaxHitPoints();
// Damage from features
return iUnitShare + GetDamageFromFeatures(pUnit->getOwner());
}
else
return 0;
}
else
{
return MAX_INT;
}
}
CvPlot* pAttackerPlot = NULL;
CvUnit* pInterceptor = NULL;
// Damage from units
// EXTREMELY IMPORTANT THAT NO RNG IS USED FOR PREDICTION!
// Otherwise a tooltip or similar can change the game state
for (DangerUnitVector::iterator it = m_apUnits.begin(); it < m_apUnits.end(); ++it)
{
CvUnit* pAttacker = GET_PLAYER(it->first).getUnit(it->second);
if (!pAttacker || pAttacker->isDelayedDeath() || pAttacker->IsDead())
continue;
pAttackerPlot = NULL;
if (pAttacker->plot() != m_pPlot)
{
if (pAttacker->IsCanAttackRanged())
{
if (pAttacker->getDomainType() == DOMAIN_AIR)
{
pInterceptor = pAttacker->GetBestInterceptor(*m_pPlot, pUnit);
int iInterceptDamage = 0;
if (pInterceptor)
{
// Always assume interception is successful
iInterceptDamage = pInterceptor->GetInterceptionDamage(pUnit, false);
}
iPlotDamage += pAttacker->GetAirCombatDamage(pUnit, NULL, false, iInterceptDamage, m_pPlot);
}
else
{
iPlotDamage += pAttacker->GetRangeCombatDamage(pUnit, NULL, false, 0, m_pPlot);
}
}
else
{
if (plotDistance(m_iX, m_iY, pUnit->getX(), pUnit->getY()) == 1)
{
pAttackerPlot = pAttacker->plot();
}
iPlotDamage += pAttacker->getCombatDamage(
pAttacker->GetMaxAttackStrength(pAttackerPlot, m_pPlot, pUnit),
pUnit->GetMaxDefenseStrength(m_pPlot, pAttacker), pAttacker->getDamage(), false, false, false);
if (pAttacker->isRangedSupportFire())
{
iPlotDamage += pAttacker->GetRangeCombatDamage(pUnit, NULL, false, 0, m_pPlot, pAttackerPlot);
}
}
}
}
// Damage from cities
for (DangerCityVector::iterator it = m_apCities.begin(); it < m_apCities.end(); ++it)
{
CvCity* pCity = GET_PLAYER(it->first).getCity(it->second);
if (!pCity || pCity->getTeam() == pUnit->getTeam())
continue;
iPlotDamage += pCity->rangeCombatDamage(pUnit, NULL, false, m_pPlot);
}
// Damage from surrounding features (citadel) and the plot itself
iPlotDamage += GetDamageFromFeatures(pUnit->getOwner());
iPlotDamage += m_bFlatPlotDamage ? m_pPlot->getTurnDamage(pUnit->ignoreTerrainDamage(), pUnit->ignoreFeatureDamage(), pUnit->extraTerrainDamage(), pUnit->extraFeatureDamage()) : 0;
//update cache
m_lastUnit = unitStats;
m_lastResult = iPlotDamage;
//done
return iPlotDamage;
}
