TargetedMovementGenerator.cpp File Reference

#include "TargetedMovementGenerator.h"
#include "Creature.h"
#include "CreatureAI.h"
#include "MoveSplineInit.h"
#include "Pet.h"
#include "Player.h"
#include "Spell.h"
#include "Transport.h"

Go to the source code of this file.

Functions
static bool	IsMutualChase (Unit *owner, Unit *target)
float	GetChaseRange (Unit const *owner, Unit const *target)
static float	GetTargetSpeedInMotion (Unit *target)
static Optional< float >	GetVelocity (Unit *owner, Unit *target, G3D::Vector3 const &dest, bool playerPet)
static Position const	PredictPosition (Unit *target)
static bool	IsValidPredictedPosition (Unit *target, Position const &predicted)

Function Documentation

GetChaseRange()

float GetChaseRange ( Unit const *  owner, Unit const *  target  )

inline

{
    float hitboxSum = owner->GetCombatReach() + target->GetCombatReach();
 
    float hoverDelta = owner->GetHoverHeight() - target->GetHoverHeight();
    if (hoverDelta != 0.0f)
        return std::sqrt(std::max(hitboxSum * hitboxSum - hoverDelta * hoverDelta, 0.0f));
 
    return hitboxSum;
}

References Unit::GetCombatReach(), and Unit::GetHoverHeight().

Referenced by ChaseMovementGenerator< T >::DoUpdate().

GetTargetSpeedInMotion()

static float GetTargetSpeedInMotion ( Unit *  target )

static

{
    if (!target->movespline->Finalized())
        return target->movespline->Velocity();
 
    return target->GetSpeed(target->m_movementInfo.GetSpeedType());
}

References Movement::MoveSpline::Finalized(), Unit::GetSpeed(), MovementInfo::GetSpeedType(), WorldObject::m_movementInfo, Unit::movespline, and Movement::MoveSpline::Velocity().

Referenced by GetVelocity().

GetVelocity()

static Optional< float > GetVelocity ( Unit *  owner, Unit *  target, G3D::Vector3 const &  dest, bool  playerPet  )

static

{
    Optional<float> speed = {};
    if (owner->IsInCombat() || owner->IsVehicle() || owner->HasUnitFlag(UNIT_FLAG_POSSESSED))
        return speed;
 
    bool isPetLike = owner->IsPet() || owner->IsGuardian() || owner->GetGUID() == target->GetCritterGUID() || owner->GetCharmerOrOwnerGUID() == target->GetGUID();
 
    // For pets/guardians/critters or creature-to-creature follow: sync with target's speed
    if (isPetLike || (owner->IsCreature() && target->IsCreature()))
    {
        speed = GetTargetSpeedInMotion(target);
 
        if (playerPet)
        {
            float distance = owner->GetDistance2d(dest.x, dest.y) - target->GetObjectSize() - (*speed / 2.f);
            if (distance > 0.f)
            {
                float multiplier = 1.f + (distance / 10.f);
                *speed *= multiplier;
            }
        }
    }
 
    return speed;
}

References Unit::GetCharmerOrOwnerGUID(), Unit::GetCritterGUID(), WorldObject::GetDistance2d(), Object::GetGUID(), WorldObject::GetObjectSize(), GetTargetSpeedInMotion(), Unit::HasUnitFlag(), Object::IsCreature(), Unit::IsGuardian(), Unit::IsInCombat(), Unit::IsPet(), Unit::IsVehicle(), and UNIT_FLAG_POSSESSED.

Referenced by FollowMovementGenerator< T >::DoUpdate().

IsMutualChase()

static bool IsMutualChase ( Unit *  owner, Unit *  target  )

static

{
    if (target->GetMotionMaster()->GetCurrentMovementGeneratorType() != CHASE_MOTION_TYPE)
        return false;
 
    return target->GetVictim() == owner;
}

References CHASE_MOTION_TYPE, MotionMaster::GetCurrentMovementGeneratorType(), Unit::GetMotionMaster(), and Unit::GetVictim().

Referenced by ChaseMovementGenerator< T >::DoUpdate().

IsValidPredictedPosition()

static bool IsValidPredictedPosition ( Unit *  target, Position const &  predicted  )

static

{
    Position current = target->GetPosition();
 
    if (current.GetExactDist2d(&predicted) > 15.0f)
        return false;
 
    // Check line of sight from current to predicted to avoid clipping through geometry
    if (!target->IsWithinLOS(predicted.GetPositionX(), predicted.GetPositionY(), predicted.GetPositionZ()))
        return false;
 
    return true;
}

References Position::GetExactDist2d(), Position::GetPosition(), Position::GetPositionX(), Position::GetPositionY(), Position::GetPositionZ(), and WorldObject::IsWithinLOS().

Referenced by FollowMovementGenerator< T >::DoUpdate().

PredictPosition()

static Position const PredictPosition ( Unit *  target )

static

{
    Position pos = target->GetPosition();
    // 0.5 - it's time (0.5 sec) between starting movement opcode (e.g. MSG_MOVE_START_FORWARD) and MSG_MOVE_HEARTBEAT sent by client
    float speed = target->GetSpeed(target->m_movementInfo.GetSpeedType()) * 0.5f;
    float orientation = target->GetOrientation();
 
    if (target->m_movementInfo.HasMovementFlag(MOVEMENTFLAG_FORWARD))
    {
        pos.m_positionX += cos(orientation) * speed;
        pos.m_positionY += std::sin(orientation) * speed;
    }
    else if (target->m_movementInfo.HasMovementFlag(MOVEMENTFLAG_BACKWARD))
    {
        pos.m_positionX -= cos(orientation) * speed;
        pos.m_positionY -= std::sin(orientation) * speed;
    }
 
    if (target->m_movementInfo.HasMovementFlag(MOVEMENTFLAG_STRAFE_LEFT))
    {
        pos.m_positionX += cos(orientation + M_PI / 2.f) * speed;
        pos.m_positionY += std::sin(orientation + M_PI / 2.f) * speed;
    }
    else if (target->m_movementInfo.HasMovementFlag(MOVEMENTFLAG_STRAFE_RIGHT))
    {
        pos.m_positionX += cos(orientation - M_PI / 2.f) * speed;
        pos.m_positionY += std::sin(orientation - M_PI / 2.f) * speed;
    }
 
    return pos;
}

References Position::GetOrientation(), Position::GetPosition(), Unit::GetSpeed(), MovementInfo::GetSpeedType(), MovementInfo::HasMovementFlag(), WorldObject::m_movementInfo, Position::m_positionX, Position::m_positionY, MOVEMENTFLAG_BACKWARD, MOVEMENTFLAG_FORWARD, MOVEMENTFLAG_STRAFE_LEFT, and MOVEMENTFLAG_STRAFE_RIGHT.

Referenced by FollowMovementGenerator< T >::DoUpdate().