bool AiTravel::execute (const MWWorld::Ptr& actor, CharacterController& characterController, AiState& state, float duration)
{
ESM::Position pos = actor.getRefData().getPosition();
actor.getClass().getCreatureStats(actor).setMovementFlag(CreatureStats::Flag_Run, false);
actor.getClass().getCreatureStats(actor).setDrawState(DrawState_Nothing);
if (!isWithinMaxRange(osg::Vec3f(mX, mY, mZ), pos.asVec3()))
return false;
if (pathTo(actor, ESM::Pathgrid::Point(static_cast<int>(mX), static_cast<int>(mY), static_cast<int>(mZ)), duration))
{
actor.getClass().getMovementSettings(actor).mPosition[1] = 0;
return true;
}
return false;
}
bool MWMechanics::AiPackage::isNearInactiveCell(const ESM::Position& actorPos)
{
const ESM::Cell* playerCell(getPlayer().getCell()->getCell());
if (playerCell->isExterior())
{
// get actor's distance from origin of center cell
osg::Vec3f actorOffset(actorPos.asVec3());
CoordinateConverter(playerCell).toLocal(actorOffset);
// currently assumes 3 x 3 grid for exterior cells, with player at center cell.
// ToDo: (Maybe) use "exterior cell load distance" setting to get count of actual active cells
// While AI Process distance is 7168, AI shuts down actors before they reach edges of 3 x 3 grid.
const float distanceFromEdge = 200.0;
float minThreshold = (-1.0f * ESM::Land::REAL_SIZE) + distanceFromEdge;
float maxThreshold = (2.0f * ESM::Land::REAL_SIZE) - distanceFromEdge;
return (actorOffset[0] < minThreshold) || (maxThreshold < actorOffset[0])
|| (actorOffset[1] < minThreshold) || (maxThreshold < actorOffset[1]);
}
else
{
return false;
}
}
bool AiCombat::attack(const MWWorld::Ptr& actor, const MWWorld::Ptr& target, AiCombatStorage& storage, CharacterController& characterController)
{
const MWWorld::CellStore*& currentCell = storage.mCell;
bool cellChange = currentCell && (actor.getCell() != currentCell);
if(!currentCell || cellChange)
{
currentCell = actor.getCell();
}
bool forceFlee = false;
if (!canFight(actor, target))
{
storage.stopAttack();
characterController.setAttackingOrSpell(false);
storage.mActionCooldown = 0.f;
// Continue combat if target is player or player follower/escorter and an attack has been attempted
const std::list<MWWorld::Ptr>& playerFollowersAndEscorters = MWBase::Environment::get().getMechanicsManager()->getActorsSidingWith(MWMechanics::getPlayer());
bool targetSidesWithPlayer = (std::find(playerFollowersAndEscorters.begin(), playerFollowersAndEscorters.end(), target) != playerFollowersAndEscorters.end());
if ((target == MWMechanics::getPlayer() || targetSidesWithPlayer)
&& ((actor.getClass().getCreatureStats(actor).getHitAttemptActorId() == target.getClass().getCreatureStats(target).getActorId())
|| (target.getClass().getCreatureStats(target).getHitAttemptActorId() == actor.getClass().getCreatureStats(actor).getActorId())))
forceFlee = true;
else // Otherwise end combat
return true;
}
const MWWorld::Class& actorClass = actor.getClass();
actorClass.getCreatureStats(actor).setMovementFlag(CreatureStats::Flag_Run, true);
float& actionCooldown = storage.mActionCooldown;
std::shared_ptr<Action>& currentAction = storage.mCurrentAction;
if (!forceFlee)
{
if (actionCooldown > 0)
return false;
if (characterController.readyToPrepareAttack())
{
currentAction = prepareNextAction(actor, target);
actionCooldown = currentAction->getActionCooldown();
}
}
else
{
currentAction.reset(new ActionFlee());
actionCooldown = currentAction->getActionCooldown();
}
if (!currentAction)
return false;
if (storage.isFleeing() != currentAction->isFleeing())
{
if (currentAction->isFleeing())
{
storage.startFleeing();
MWBase::Environment::get().getDialogueManager()->say(actor, "flee");
return false;
}
else
storage.stopFleeing();
}
bool isRangedCombat = false;
float &rangeAttack = storage.mAttackRange;
rangeAttack = currentAction->getCombatRange(isRangedCombat);
// Get weapon characteristics
const ESM::Weapon* weapon = currentAction->getWeapon();
ESM::Position pos = actor.getRefData().getPosition();
osg::Vec3f vActorPos(pos.asVec3());
osg::Vec3f vTargetPos(target.getRefData().getPosition().asVec3());
osg::Vec3f vAimDir = MWBase::Environment::get().getWorld()->aimToTarget(actor, target);
float distToTarget = MWBase::Environment::get().getWorld()->getHitDistance(actor, target);
storage.mReadyToAttack = (currentAction->isAttackingOrSpell() && distToTarget <= rangeAttack && storage.mLOS);
if (storage.mReadyToAttack)
{
storage.startCombatMove(isRangedCombat, distToTarget, rangeAttack, actor, target);
// start new attack
storage.startAttackIfReady(actor, characterController, weapon, isRangedCombat);
if (isRangedCombat)
{
// rotate actor taking into account target movement direction and projectile speed
osg::Vec3f& lastTargetPos = storage.mLastTargetPos;
vAimDir = AimDirToMovingTarget(actor, target, lastTargetPos, AI_REACTION_TIME, (weapon ? weapon->mData.mType : 0), storage.mStrength);
lastTargetPos = vTargetPos;
storage.mMovement.mRotation[0] = getXAngleToDir(vAimDir);
storage.mMovement.mRotation[2] = getZAngleToDir(vAimDir);
}
else
{
storage.mMovement.mRotation[0] = getXAngleToDir(vAimDir);
storage.mMovement.mRotation[2] = getZAngleToDir((vTargetPos-vActorPos)); // using vAimDir results in spastic movements since the head is animated
}
}
return false;
}
bool AiCombat::reactionTimeActions(const MWWorld::Ptr& actor, CharacterController& characterController,
AiCombatStorage& storage, MWWorld::Ptr target)
{
MWMechanics::Movement& movement = storage.mMovement;
if (isTargetMagicallyHidden(target))
{
storage.stopAttack();
return false; // TODO: run away instead of doing nothing
}
const MWWorld::CellStore*& currentCell = storage.mCell;
bool cellChange = currentCell && (actor.getCell() != currentCell);
if(!currentCell || cellChange)
{
currentCell = actor.getCell();
}
const MWWorld::Class& actorClass = actor.getClass();
actorClass.getCreatureStats(actor).setMovementFlag(CreatureStats::Flag_Run, true);
float& actionCooldown = storage.mActionCooldown;
if (actionCooldown > 0)
return false;
float rangeAttack = 0;
float rangeFollow = 0;
boost::shared_ptr<Action>& currentAction = storage.mCurrentAction;
if (characterController.readyToPrepareAttack())
{
currentAction = prepareNextAction(actor, target);
actionCooldown = currentAction->getActionCooldown();
}
if (currentAction.get())
currentAction->getCombatRange(rangeAttack, rangeFollow);
// FIXME: consider moving this stuff to ActionWeapon::getCombatRange
const ESM::Weapon *weapon = NULL;
MWMechanics::WeaponType weaptype = WeapType_None;
float weapRange = 1.0f;
// Get weapon characteristics
MWBase::World* world = MWBase::Environment::get().getWorld();
if (actorClass.hasInventoryStore(actor))
{
//Get weapon range
MWWorld::ContainerStoreIterator weaponSlot =
MWMechanics::getActiveWeapon(actorClass.getCreatureStats(actor), actorClass.getInventoryStore(actor), &weaptype);
if (weaptype == WeapType_HandToHand)
{
static float fHandToHandReach =
world->getStore().get<ESM::GameSetting>().find("fHandToHandReach")->getFloat();
weapRange = fHandToHandReach;
}
else if (weaptype != WeapType_PickProbe && weaptype != WeapType_Spell && weaptype != WeapType_None)
{
// All other WeapTypes are actually weapons, so get<ESM::Weapon> is safe.
weapon = weaponSlot->get<ESM::Weapon>()->mBase;
weapRange = weapon->mData.mReach;
}
weapRange *= 100.0f;
}
else //is creature
{
weaptype = actorClass.getCreatureStats(actor).getDrawState() == DrawState_Spell ? WeapType_Spell : WeapType_HandToHand;
weapRange = 150.0f; //TODO: use true attack range (the same problem in Creature::hit)
}
bool distantCombat = false;
if (weaptype != WeapType_Spell)
{
// TODO: move to ActionWeapon
if (weaptype == WeapType_BowAndArrow || weaptype == WeapType_Crossbow || weaptype == WeapType_Thrown)
{
rangeAttack = 1000;
rangeFollow = 0; // not needed in ranged combat
distantCombat = true;
}
else
{
rangeAttack = weapRange;
rangeFollow = 300;
}
}
else
{
distantCombat = (rangeAttack > 500);
}
bool& readyToAttack = storage.mReadyToAttack;
// start new attack
storage.startAttackIfReady(actor, characterController, weapon, distantCombat);
/*
* Some notes on meanings of variables:
*
* rangeAttack:
*
* - Distance where attack using the actor's weapon is possible:
* longer for ranged weapons (obviously?) vs. melee weapons
* - Determined by weapon's reach parameter; hardcoded value
* for ranged weapon and for creatures
* - Once within this distance mFollowTarget is triggered
*
* rangeFollow:
*
* - Applies to melee weapons or hand to hand only (or creatures without
* weapons)
* - Distance a little further away than the actor's weapon reach
* i.e. rangeFollow > rangeAttack for melee weapons
* - Hardcoded value (0 for ranged weapons)
* - Once the target gets beyond this distance mFollowTarget is cleared
* and a path to the target needs to be found
*
* mFollowTarget:
*
* - Once triggered, the actor follows the target with LOS shortcut
* (the shortcut really only applies to cells where pathgrids are
* available, since the default path without pathgrids is direct to
* target even if LOS is not achieved)
*/
ESM::Position pos = actor.getRefData().getPosition();
osg::Vec3f vActorPos(pos.asVec3());
osg::Vec3f vTargetPos(target.getRefData().getPosition().asVec3());
osg::Vec3f vAimDir = MWBase::Environment::get().getWorld()->aimToTarget(actor, target);
float distToTarget = MWBase::Environment::get().getWorld()->getHitDistance(actor, target);
osg::Vec3f& lastActorPos = storage.mLastActorPos;
bool& followTarget = storage.mFollowTarget;
bool isStuck = false;
float speed = 0.0f;
if(movement.mPosition[1] && (lastActorPos - vActorPos).length() < (speed = actorClass.getSpeed(actor)) * REACTION_INTERVAL / 2)
isStuck = true;
lastActorPos = vActorPos;
// check if actor can move along z-axis
bool canMoveByZ = (actorClass.canSwim(actor) && world->isSwimming(actor))
|| world->isFlying(actor);
// can't fight if attacker can't go where target is. E.g. A fish can't attack person on land.
if (distToTarget >= rangeAttack
&& !actorClass.isNpc() && !MWMechanics::isEnvironmentCompatible(actor, target))
{
// TODO: start fleeing?
storage.stopAttack();
return false;
}
// for distant combat we should know if target is in LOS even if distToTarget < rangeAttack
bool inLOS = distantCombat ? world->getLOS(actor, target) : true;
// (within attack dist) || (not quite attack dist while following)
if(inLOS && (distToTarget < rangeAttack || (distToTarget <= rangeFollow && followTarget && !isStuck)))
{
mPathFinder.clearPath();
//Melee and Close-up combat
// getXAngleToDir determines vertical angle to target:
// if actor can move along z-axis it will control movement dir
// if can't - it will control correct aiming.
// note: in getZAngleToDir if we preserve dir.z then horizontal angle can be inaccurate
if (distantCombat)
{
osg::Vec3f& lastTargetPos = storage.mLastTargetPos;
vAimDir = AimDirToMovingTarget(actor, target, lastTargetPos, REACTION_INTERVAL, weaptype,
storage.mStrength);
lastTargetPos = vTargetPos;
movement.mRotation[0] = getXAngleToDir(vAimDir);
movement.mRotation[2] = getZAngleToDir(vAimDir);
}
else
{
movement.mRotation[0] = getXAngleToDir(vAimDir);
movement.mRotation[2] = getZAngleToDir((vTargetPos-vActorPos)); // using vAimDir results in spastic movements since the head is animated
}
// (not quite attack dist while following)
if (followTarget && distToTarget > rangeAttack)
{
//Close-up combat: just run up on target
storage.stopCombatMove();
movement.mPosition[1] = 1;
}
else // (within attack dist)
{
storage.startCombatMove(actorClass.isNpc(), distantCombat, distToTarget, rangeAttack);
readyToAttack = true;
//only once got in melee combat, actor is allowed to use close-up shortcutting
followTarget = true;
}
}
else // remote pathfinding
{
bool preferShortcut = false;
if (!distantCombat) inLOS = world->getLOS(actor, target);
// check if shortcut is available
bool& forceNoShortcut = storage.mForceNoShortcut;
ESM::Position& shortcutFailPos = storage.mShortcutFailPos;
if(inLOS && (!isStuck || readyToAttack)
&& (!forceNoShortcut || (shortcutFailPos.asVec3() - vActorPos).length() >= PATHFIND_SHORTCUT_RETRY_DIST))
{
if(speed == 0.0f) speed = actorClass.getSpeed(actor);
// maximum dist before pit/obstacle for actor to avoid them depending on his speed
float maxAvoidDist = REACTION_INTERVAL * speed + speed / MAX_VEL_ANGULAR_RADIANS * 2; // *2 - for reliability
preferShortcut = checkWayIsClear(vActorPos, vTargetPos, osg::Vec3f(vAimDir.x(), vAimDir.y(), 0).length() > maxAvoidDist*1.5? maxAvoidDist : maxAvoidDist/2);
}
// don't use pathgrid when actor can move in 3 dimensions
if (canMoveByZ)
{
preferShortcut = true;
movement.mRotation[0] = getXAngleToDir(vAimDir);
}
if(preferShortcut)
{
movement.mRotation[2] = getZAngleToDir((vTargetPos-vActorPos));
forceNoShortcut = false;
shortcutFailPos.pos[0] = shortcutFailPos.pos[1] = shortcutFailPos.pos[2] = 0;
mPathFinder.clearPath();
}
else // if shortcut failed stick to path grid
{
if(!isStuck && shortcutFailPos.pos[0] == 0.0f && shortcutFailPos.pos[1] == 0.0f && shortcutFailPos.pos[2] == 0.0f)
{
forceNoShortcut = true;
shortcutFailPos = pos;
}
followTarget = false;
buildNewPath(actor, target);
// should always return a path (even if it's just go straight on target.)
assert(mPathFinder.isPathConstructed());
}
if (readyToAttack)
{
// to stop possible sideway moving after target moved out of attack range
storage.stopCombatMove();
readyToAttack = false;
}
movement.mPosition[1] = 1;
}
return false;
}
void AiCombat::attack(const MWWorld::Ptr& actor, const MWWorld::Ptr& target, AiCombatStorage& storage, CharacterController& characterController)
{
if (isTargetMagicallyHidden(target))
{
storage.stopAttack();
return; // TODO: run away instead of doing nothing
}
const MWWorld::CellStore*& currentCell = storage.mCell;
bool cellChange = currentCell && (actor.getCell() != currentCell);
if(!currentCell || cellChange)
{
currentCell = actor.getCell();
}
const MWWorld::Class& actorClass = actor.getClass();
actorClass.getCreatureStats(actor).setMovementFlag(CreatureStats::Flag_Run, true);
float& actionCooldown = storage.mActionCooldown;
if (actionCooldown > 0)
return;
float &rangeAttack = storage.mAttackRange;
boost::shared_ptr<Action>& currentAction = storage.mCurrentAction;
if (characterController.readyToPrepareAttack())
{
currentAction = prepareNextAction(actor, target);
actionCooldown = currentAction->getActionCooldown();
}
const ESM::Weapon *weapon = NULL;
bool isRangedCombat = false;
if (currentAction.get())
{
rangeAttack = currentAction->getCombatRange(isRangedCombat);
// Get weapon characteristics
weapon = currentAction->getWeapon();
}
ESM::Position pos = actor.getRefData().getPosition();
osg::Vec3f vActorPos(pos.asVec3());
osg::Vec3f vTargetPos(target.getRefData().getPosition().asVec3());
osg::Vec3f vAimDir = MWBase::Environment::get().getWorld()->aimToTarget(actor, target);
float distToTarget = MWBase::Environment::get().getWorld()->getHitDistance(actor, target);
storage.mReadyToAttack = (distToTarget <= rangeAttack);
// can't fight if attacker can't go where target is. E.g. A fish can't attack person on land.
if (distToTarget > rangeAttack
&& !actorClass.isNpc() && !MWMechanics::isEnvironmentCompatible(actor, target))
{
// TODO: start fleeing?
storage.stopAttack();
return;
}
if (storage.mReadyToAttack)
{
storage.startCombatMove(actorClass.isNpc(), isRangedCombat, distToTarget, rangeAttack);
// start new attack
storage.startAttackIfReady(actor, characterController, weapon, isRangedCombat);
if (isRangedCombat)
{
// rotate actor taking into account target movement direction and projectile speed
osg::Vec3f& lastTargetPos = storage.mLastTargetPos;
vAimDir = AimDirToMovingTarget(actor, target, lastTargetPos, AI_REACTION_TIME, (weapon ? weapon->mData.mType : 0), storage.mStrength);
lastTargetPos = vTargetPos;
storage.mMovement.mRotation[0] = getXAngleToDir(vAimDir);
storage.mMovement.mRotation[2] = getZAngleToDir(vAimDir);
}
else
{
storage.mMovement.mRotation[0] = getXAngleToDir(vAimDir);
storage.mMovement.mRotation[2] = getZAngleToDir((vTargetPos-vActorPos)); // using vAimDir results in spastic movements since the head is animated
}
}
}
