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BattleAI: check negative obstacles instead of moat.

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This will work for fire walls too (and if someone will summon elementals
after placing land mines). But will not work for Tower's landmines.
This commit is contained in:
Konstantin 2023-03-20 12:41:36 +03:00
parent 1100bc7a5b
commit 6c5f5dba75
1 changed files with 22 additions and 8 deletions
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30
AI/BattleAI/BattleAI.cpp
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@ -19,6 +19,7 @@
#include "../../lib/spells/CSpellHandler.h"
#include "../../lib/spells/ISpellMechanics.h"
#include "../../lib/battle/BattleStateInfoForRetreat.h"
#include "../../lib/battle/CObstacleInstance.h"
#include "../../lib/CStack.h" // TODO: remove
// Eventually only IBattleInfoCallback and battle::Unit should be used,
// CUnitState should be private and CStack should be removed completely
@ -309,25 +310,38 @@ BattleAction CBattleAI::goTowardsNearest(const CStack * stack, std::vector<Battl
if(stack->hasBonusOfType(Bonus::FLYING))
{
std::set<BattleHex> moatHexes;
std::set<BattleHex> obstacleHexes;
if(hb.battleGetSiegeLevel() >= BuildingID::CITADEL)
{
auto townMoat = hb.getDefendedTown()->town->moatHexes;
auto insertAffected = [](const CObstacleInstance* spellObst, std::set<BattleHex> obstacleHexes) {
auto affectedHexes = spellObst->getAffectedTiles();
obstacleHexes.insert(affectedHexes.cbegin(), affectedHexes.cend());
};
moatHexes = std::set<BattleHex>(townMoat.begin(), townMoat.end());
const auto & obstacles = hb.battleGetAllObstacles();
for (const auto & obst: obstacles) {
const auto * spellObst = dynamic_cast<const SpellCreatedObstacle*>(obst.get());
if(spellObst && spellObst->trigger)
{
auto triggerAbility = VLC->spells()->getById(SpellID(spellObst->ID));
auto triggerIsNegative = triggerAbility->isNegative() || triggerAbility->isDamage();
if(triggerIsNegative)
insertAffected(spellObst, obstacleHexes);
}
}
// Flying stack doesn't go hex by hex, so we can't backtrack using predecessors.
// We just check all available hexes and pick the one closest to the target.
auto nearestAvailableHex = vstd::minElementByFun(avHexes, [&](BattleHex hex) -> int
{
const int MOAT_PENALTY = 100; // avoid landing on moat
const int NEGATIVE_OBSTACLE_PENALTY = 100; // avoid landing on negative obstacle (moat, fire wall, etc)
const int BLOCKED_STACK_PENALTY = 100; // avoid landing on moat
auto distance = BattleHex::getDistance(bestNeighbor, hex);
if(vstd::contains(moatHexes, hex))
distance += MOAT_PENALTY;
if(vstd::contains(obstacleHexes, hex))
distance += NEGATIVE_OBSTACLE_PENALTY;
return scoreEvaluator.checkPositionBlocksOurStacks(hb, stack, hex) ? BLOCKED_STACK_PENALTY + distance : distance;
});