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/*
* AIMovementAfterDestinationRule.cpp, part of VCMI engine
*
* Authors: listed in file AUTHORS in main folder
*
* License: GNU General Public License v2.0 or later
* Full text of license available in license.txt file, in main folder
*
*/
#include "StdInc.h"
#include "AIMovementAfterDestinationRule.h"
#include "../Actions/BattleAction.h"
namespace AIPathfinding
{
AIMovementAfterDestinationRule::AIMovementAfterDestinationRule(
CPlayerSpecificInfoCallback * cb,
std::shared_ptr<AINodeStorage> nodeStorage)
:cb(cb), nodeStorage(nodeStorage)
{
}
void AIMovementAfterDestinationRule::process(
const PathNodeInfo & source,
CDestinationNodeInfo & destination,
const PathfinderConfig * pathfinderConfig,
CPathfinderHelper * pathfinderHelper) const
{
if(nodeStorage->hasBetterChain(source, destination))
{
destination.blocked = true;
return;
}
auto blocker = getBlockingReason(source, destination, pathfinderConfig, pathfinderHelper);
if(blocker == BlockingReason::NONE)
return;
if(blocker == BlockingReason::DESTINATION_BLOCKVIS && destination.nodeObject)
{
auto objID = destination.nodeObject->ID;
auto enemyHero = objID == Obj::HERO && destination.objectRelations == PlayerRelations::ENEMIES;
if(!enemyHero && !isObjectRemovable(destination.nodeObject))
{
destination.blocked = true;
}
return;
}
if(blocker == BlockingReason::DESTINATION_VISIT)
{
return;
}
if(blocker == BlockingReason::DESTINATION_GUARDED)
{
auto srcGuardians = cb->getGuardingCreatures(source.coord);
auto destGuardians = cb->getGuardingCreatures(destination.coord);
if(destGuardians.empty())
{
destination.blocked = true;
return;
}
vstd::erase_if(destGuardians, [&](const CGObjectInstance * destGuard) -> bool
{
return vstd::contains(srcGuardians, destGuard);
});
auto guardsAlreadyBypassed = destGuardians.empty() && srcGuardians.size();
if(guardsAlreadyBypassed && nodeStorage->isBattleNode(source.node))
{
#ifdef VCMI_TRACE_PATHFINDER
logAi->trace(
"Bypass guard at destination while moving %s -> %s",
source.coord.toString(),
destination.coord.toString());
#endif
return;
}
const AIPathNode * destNode = nodeStorage->getAINode(destination.node);
auto battleNodeOptional = nodeStorage->getOrCreateNode(
destination.coord,
destination.node->layer,
destNode->chainMask | AINodeStorage::BATTLE_CHAIN);
if(!battleNodeOptional)
{
#ifdef VCMI_TRACE_PATHFINDER
logAi->trace(
"Can not allocate battle node while moving %s -> %s",
source.coord.toString(),
destination.coord.toString());
#endif
destination.blocked = true;
return;
}
auto * battleNode = battleNodeOptional.value();
if(battleNode->locked)
{
#ifdef VCMI_TRACE_PATHFINDER
logAi->trace(
"Block bypass guard at destination while moving %s -> %s",
source.coord.toString(),
destination.coord.toString());
#endif
destination.blocked = true;
return;
}
auto danger = nodeStorage->evaluateDanger(destination.coord);
destination.node = battleNode;
nodeStorage->commit(destination, source);
if(battleNode->danger < danger)
{
battleNode->danger = danger;
}
battleNode->specialAction = std::make_shared<BattleAction>(destination.coord);
#ifdef VCMI_TRACE_PATHFINDER
logAi->trace(
"Begin bypass guard at destination with danger %s while moving %s -> %s",
std::to_string(danger),
source.coord.toString(),
destination.coord.toString());
#endif
return;
}
destination.blocked = true;
}
}
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