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server/src/game/FleeingMovementGenerator.cpp

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/*
* Copyright (C) 2005-2010 MaNGOS <http://getmangos.com/>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "Creature.h"
#include "CreatureAI.h"
#include "MapManager.h"
#include "FleeingMovementGenerator.h"
#include "DestinationHolderImp.h"
#include "ObjectAccessor.h"
#define MIN_QUIET_DISTANCE 28.0f
#define MAX_QUIET_DISTANCE 43.0f
template<class T>
void
FleeingMovementGenerator<T>::_setTargetLocation(T &owner)
{
if( !&owner )
return;
// ignore in case other no reaction state
if (owner.hasUnitState(UNIT_STAT_CAN_NOT_REACT & ~UNIT_STAT_FLEEING))
return;
if(!_setMoveData(owner))
return;
float x, y, z;
if(!_getPoint(owner, x, y, z))
return;
owner.addUnitState(UNIT_STAT_FLEEING_MOVE);
Traveller<T> traveller(owner);
i_destinationHolder.SetDestination(traveller, x, y, z);
}
template<class T>
bool
FleeingMovementGenerator<T>::_getPoint(T &owner, float &x, float &y, float &z)
{
if(!&owner)
return false;
x = owner.GetPositionX();
y = owner.GetPositionY();
z = owner.GetPositionZ();
float temp_x, temp_y, angle;
const Map * _map = owner.GetBaseMap();
//primitive path-finding
for(uint8 i = 0; i < 18; ++i)
{
if(i_only_forward && i > 2)
break;
float distance = 5.0f;
switch(i)
{
case 0:
angle = i_cur_angle;
break;
case 1:
angle = i_cur_angle;
distance /= 2;
break;
case 2:
angle = i_cur_angle;
distance /= 4;
break;
case 3:
angle = i_cur_angle + M_PI_F/4.0f;
break;
case 4:
angle = i_cur_angle - M_PI_F/4.0f;
break;
case 5:
angle = i_cur_angle + M_PI_F/4.0f;
distance /= 2;
break;
case 6:
angle = i_cur_angle - M_PI_F/4.0f;
distance /= 2;
break;
case 7:
angle = i_cur_angle + M_PI_F/2.0f;
break;
case 8:
angle = i_cur_angle - M_PI_F/2.0f;
break;
case 9:
angle = i_cur_angle + M_PI_F/2.0f;
distance /= 2;
break;
case 10:
angle = i_cur_angle - M_PI_F/2.0f;
distance /= 2;
break;
case 11:
angle = i_cur_angle + M_PI_F/4.0f;
distance /= 4;
break;
case 12:
angle = i_cur_angle - M_PI_F/4.0f;
distance /= 4;
break;
case 13:
angle = i_cur_angle + M_PI_F/2.0f;
distance /= 4;
break;
case 14:
angle = i_cur_angle - M_PI_F/2.0f;
distance /= 4;
break;
case 15:
angle = i_cur_angle + M_PI_F*3/4.0f;
distance /= 2;
break;
case 16:
angle = i_cur_angle - M_PI_F*3/4.0f;
distance /= 2;
break;
case 17:
angle = i_cur_angle + M_PI_F;
distance /= 2;
break;
}
temp_x = x + distance * cos(angle);
temp_y = y + distance * sin(angle);
MaNGOS::NormalizeMapCoord(temp_x);
MaNGOS::NormalizeMapCoord(temp_y);
if( owner.IsWithinLOS(temp_x,temp_y,z))
{
bool is_water_now = _map->IsInWater(x,y,z);
if(is_water_now && _map->IsInWater(temp_x,temp_y,z))
{
x = temp_x;
y = temp_y;
return true;
}
float new_z = _map->GetHeight(temp_x,temp_y,z,true);
if(new_z <= INVALID_HEIGHT)
continue;
bool is_water_next = _map->IsInWater(temp_x,temp_y,new_z);
if((is_water_now && !is_water_next && !is_land_ok) || (!is_water_now && is_water_next && !is_water_ok))
continue;
if( !(new_z - z) || distance / fabs(new_z - z) > 1.0f)
{
float new_z_left = _map->GetHeight(temp_x + 1.0f*cos(angle+M_PI_F/2),temp_y + 1.0f*sin(angle+M_PI_F/2),z,true);
float new_z_right = _map->GetHeight(temp_x + 1.0f*cos(angle-M_PI_F/2),temp_y + 1.0f*sin(angle-M_PI_F/2),z,true);
if(fabs(new_z_left - new_z) < 1.2f && fabs(new_z_right - new_z) < 1.2f)
{
x = temp_x;
y = temp_y;
z = new_z;
return true;
}
}
}
}
i_to_distance_from_caster = 0.0f;
i_nextCheckTime.Reset( urand(500,1000) );
return false;
}
template<class T>
bool
FleeingMovementGenerator<T>::_setMoveData(T &owner)
{
float cur_dist_xyz = owner.GetDistance(i_caster_x, i_caster_y, i_caster_z);
if(i_to_distance_from_caster > 0.0f)
{
if((i_last_distance_from_caster > i_to_distance_from_caster && cur_dist_xyz < i_to_distance_from_caster) ||
// if we reach lower distance
(i_last_distance_from_caster > i_to_distance_from_caster && cur_dist_xyz > i_last_distance_from_caster) ||
// if we can't be close
(i_last_distance_from_caster < i_to_distance_from_caster && cur_dist_xyz > i_to_distance_from_caster) ||
// if we reach bigger distance
(cur_dist_xyz > MAX_QUIET_DISTANCE) || // if we are too far
(i_last_distance_from_caster > MIN_QUIET_DISTANCE && cur_dist_xyz < MIN_QUIET_DISTANCE) )
// if we leave 'quiet zone'
{
// we are very far or too close, stopping
i_to_distance_from_caster = 0.0f;
i_nextCheckTime.Reset( urand(500,1000) );
return false;
}
else
{
// now we are running, continue
i_last_distance_from_caster = cur_dist_xyz;
return true;
}
}
float cur_dist;
float angle_to_caster;
Unit * fright = ObjectAccessor::GetUnit(owner, i_frightGUID);
if(fright)
{
cur_dist = fright->GetDistance(&owner);
if(cur_dist < cur_dist_xyz)
{
i_caster_x = fright->GetPositionX();
i_caster_y = fright->GetPositionY();
i_caster_z = fright->GetPositionZ();
angle_to_caster = fright->GetAngle(&owner);
}
else
{
cur_dist = cur_dist_xyz;
angle_to_caster = owner.GetAngle(i_caster_x, i_caster_y) + M_PI_F;
}
}
else
{
cur_dist = cur_dist_xyz;
angle_to_caster = owner.GetAngle(i_caster_x, i_caster_y) + M_PI_F;
}
// if we too close may use 'path-finding' else just stop
i_only_forward = cur_dist >= MIN_QUIET_DISTANCE/3;
//get angle and 'distance from caster' to run
float angle;
if(i_cur_angle == 0.0f && i_last_distance_from_caster == 0.0f) //just started, first time
{
angle = rand_norm_f()*(1.0f - cur_dist/MIN_QUIET_DISTANCE) * M_PI_F/3 + rand_norm_f()*M_PI_F*2/3;
i_to_distance_from_caster = MIN_QUIET_DISTANCE;
i_only_forward = true;
}
else if(cur_dist < MIN_QUIET_DISTANCE)
{
angle = M_PI_F/6 + rand_norm_f()*M_PI_F*2/3;
i_to_distance_from_caster = cur_dist*2/3 + rand_norm_f()*(MIN_QUIET_DISTANCE - cur_dist*2/3);
}
else if(cur_dist > MAX_QUIET_DISTANCE)
{
angle = rand_norm_f()*M_PI_F/3 + M_PI_F*2/3;
i_to_distance_from_caster = MIN_QUIET_DISTANCE + 2.5f + rand_norm_f()*(MAX_QUIET_DISTANCE - MIN_QUIET_DISTANCE - 2.5f);
}
else
{
angle = rand_norm_f()*M_PI_F;
i_to_distance_from_caster = MIN_QUIET_DISTANCE + 2.5f + rand_norm_f()*(MAX_QUIET_DISTANCE - MIN_QUIET_DISTANCE - 2.5f);
}
int8 sign = rand_norm_f() > 0.5f ? 1 : -1;
i_cur_angle = sign*angle + angle_to_caster;
// current distance
i_last_distance_from_caster = cur_dist;
return true;
}
template<class T>
void
FleeingMovementGenerator<T>::Initialize(T &owner)
{
owner.addUnitState(UNIT_STAT_FLEEING|UNIT_STAT_FLEEING_MOVE);
_Init(owner);
if(Unit * fright = ObjectAccessor::GetUnit(owner, i_frightGUID))
{
i_caster_x = fright->GetPositionX();
i_caster_y = fright->GetPositionY();
i_caster_z = fright->GetPositionZ();
}
else
{
i_caster_x = owner.GetPositionX();
i_caster_y = owner.GetPositionY();
i_caster_z = owner.GetPositionZ();
}
i_only_forward = true;
i_cur_angle = 0.0f;
i_last_distance_from_caster = 0.0f;
i_to_distance_from_caster = 0.0f;
_setTargetLocation(owner);
}
template<>
void
FleeingMovementGenerator<Creature>::_Init(Creature &owner)
{
owner.RemoveSplineFlag(SPLINEFLAG_WALKMODE);
owner.SetTargetGuid(ObjectGuid());
is_water_ok = owner.CanSwim();
is_land_ok = owner.CanWalk();
}
template<>
void
FleeingMovementGenerator<Player>::_Init(Player &)
{
is_water_ok = true;
is_land_ok = true;
}
template<>
void FleeingMovementGenerator<Player>::Finalize(Player &owner)
{
owner.clearUnitState(UNIT_STAT_FLEEING|UNIT_STAT_FLEEING_MOVE);
}
template<>
void FleeingMovementGenerator<Creature>::Finalize(Creature &owner)
{
owner.AddSplineFlag(SPLINEFLAG_WALKMODE);
owner.clearUnitState(UNIT_STAT_FLEEING|UNIT_STAT_FLEEING_MOVE);
}
template<class T>
void FleeingMovementGenerator<T>::Interrupt(T &owner)
{
// flee state still applied while movegen disabled
owner.clearUnitState(UNIT_STAT_FLEEING_MOVE);
}
template<class T>
void FleeingMovementGenerator<T>::Reset(T &owner)
{
Initialize(owner);
}
template<class T>
bool FleeingMovementGenerator<T>::Update(T &owner, const uint32 & time_diff)
{
if( !&owner || !owner.isAlive() )
return false;
// ignore in case other no reaction state
if (owner.hasUnitState(UNIT_STAT_CAN_NOT_REACT & ~UNIT_STAT_FLEEING))
{
owner.clearUnitState(UNIT_STAT_FLEEING_MOVE);
return true;
}
Traveller<T> traveller(owner);
i_nextCheckTime.Update(time_diff);
if( (owner.IsStopped() && !i_destinationHolder.HasArrived()) || !i_destinationHolder.HasDestination() )
{
_setTargetLocation(owner);
return true;
}
if (i_destinationHolder.UpdateTraveller(traveller, time_diff, false))
{
if (!IsActive(owner)) // force stop processing (movement can move out active zone with cleanup movegens list)
return true; // not expire now, but already lost
i_destinationHolder.ResetUpdate(50);
if(i_nextCheckTime.Passed() && i_destinationHolder.HasArrived())
{
_setTargetLocation(owner);
return true;
}
}
return true;
}
template void FleeingMovementGenerator<Player>::Initialize(Player &);
template void FleeingMovementGenerator<Creature>::Initialize(Creature &);
template bool FleeingMovementGenerator<Player>::_setMoveData(Player &);
template bool FleeingMovementGenerator<Creature>::_setMoveData(Creature &);
template bool FleeingMovementGenerator<Player>::_getPoint(Player &, float &, float &, float &);
template bool FleeingMovementGenerator<Creature>::_getPoint(Creature &, float &, float &, float &);
template void FleeingMovementGenerator<Player>::_setTargetLocation(Player &);
template void FleeingMovementGenerator<Creature>::_setTargetLocation(Creature &);
template void FleeingMovementGenerator<Player>::Interrupt(Player &);
template void FleeingMovementGenerator<Creature>::Interrupt(Creature &);
template void FleeingMovementGenerator<Player>::Reset(Player &);
template void FleeingMovementGenerator<Creature>::Reset(Creature &);
template bool FleeingMovementGenerator<Player>::Update(Player &, const uint32 &);
template bool FleeingMovementGenerator<Creature>::Update(Creature &, const uint32 &);
void TimedFleeingMovementGenerator::Finalize(Unit &owner)
{
owner.clearUnitState(UNIT_STAT_FLEEING|UNIT_STAT_FLEEING_MOVE);
if (Unit* victim = owner.getVictim())
{
if (owner.isAlive())
{
owner.AttackStop(true);
((Creature*)&owner)->AI()->AttackStart(victim);
}
}
}
bool TimedFleeingMovementGenerator::Update(Unit & owner, const uint32 & time_diff)
{
if( !owner.isAlive() )
return false;
// ignore in case other no reaction state
if (owner.hasUnitState(UNIT_STAT_CAN_NOT_REACT & ~UNIT_STAT_FLEEING))
{
owner.clearUnitState(UNIT_STAT_FLEEING_MOVE);
return true;
}
i_totalFleeTime.Update(time_diff);
if (i_totalFleeTime.Passed())
return false;
// This calls grant-parent Update method hiden by FleeingMovementGenerator::Update(Creature &, const uint32 &) version
// This is done instead of casting Unit& to Creature& and call parent method, then we can use Unit directly
return MovementGeneratorMedium< Creature, FleeingMovementGenerator<Creature> >::Update(owner, time_diff);
}
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