src/game/FleeingMovementGenerator.cpp

   1 /*
   2  * Copyright (C) 2005-2010 MaNGOS <http://getmangos.com/>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  17  */
  18
  19 #include "Creature.h"
  20 #include "CreatureAI.h"
  21 #include "MapManager.h"
  22 #include "FleeingMovementGenerator.h"
  23 #include "DestinationHolderImp.h"
  24 #include "ObjectAccessor.h"
  25
  26 #define MIN_QUIET_DISTANCE 28.0f
  27 #define MAX_QUIET_DISTANCE 43.0f
  28
  29 template<class T>
  30 void
  31 FleeingMovementGenerator<T>::_setTargetLocation(T &owner)
  32 {
  33     if( !&owner )
  34         return;
  35
  36     // ignore in case other no reaction state
  37     if (owner.hasUnitState(UNIT_STAT_CAN_NOT_REACT & ~UNIT_STAT_FLEEING))
  38         return;
  39
  40     if(!_setMoveData(owner))
  41         return;
  42
  43     float x, y, z;
  44     if(!_getPoint(owner, x, y, z))
  45         return;
  46
  47     owner.addUnitState(UNIT_STAT_FLEEING_MOVE);
  48     Traveller<T> traveller(owner);
  49     i_destinationHolder.SetDestination(traveller, x, y, z);
  50 }
  51
  52 template<class T>
  53 bool
  54 FleeingMovementGenerator<T>::_getPoint(T &owner, float &x, float &y, float &z)
  55 {
  56     if(!&owner)
  57         return false;
  58
  59     x = owner.GetPositionX();
  60     y = owner.GetPositionY();
  61     z = owner.GetPositionZ();
  62
  63     float temp_x, temp_y, angle;
  64     const Map * _map = owner.GetBaseMap();
  65     //primitive path-finding
  66     for(uint8 i = 0; i < 18; ++i)
  67     {
  68         if(i_only_forward && i > 2)
  69             break;
  70
  71         float distance = 5.0f;
  72
  73         switch(i)
  74         {
  75             case 0:
  76                 angle = i_cur_angle;
  77                 break;
  78             case 1:
  79                 angle = i_cur_angle;
  80                 distance /= 2;
  81                 break;
  82             case 2:
  83                 angle = i_cur_angle;
  84                 distance /= 4;
  85                 break;
  86             case 3:
  87                 angle = i_cur_angle + M_PI_F/4.0f;
  88                 break;
  89             case 4:
  90                 angle = i_cur_angle - M_PI_F/4.0f;
  91                 break;
  92             case 5:
  93                 angle = i_cur_angle + M_PI_F/4.0f;
  94                 distance /= 2;
  95                 break;
  96             case 6:
  97                 angle = i_cur_angle - M_PI_F/4.0f;
  98                 distance /= 2;
  99                 break;
 100             case 7:
 101                 angle = i_cur_angle + M_PI_F/2.0f;
 102                 break;
 103             case 8:
 104                 angle = i_cur_angle - M_PI_F/2.0f;
 105                 break;
 106             case 9:
 107                 angle = i_cur_angle + M_PI_F/2.0f;
 108                 distance /= 2;
 109                 break;
 110             case 10:
 111                 angle = i_cur_angle - M_PI_F/2.0f;
 112                 distance /= 2;
 113                 break;
 114             case 11:
 115                 angle = i_cur_angle + M_PI_F/4.0f;
 116                 distance /= 4;
 117                 break;
 118             case 12:
 119                 angle = i_cur_angle - M_PI_F/4.0f;
 120                 distance /= 4;
 121                 break;
 122             case 13:
 123                 angle = i_cur_angle + M_PI_F/2.0f;
 124                 distance /= 4;
 125                 break;
 126             case 14:
 127                 angle = i_cur_angle - M_PI_F/2.0f;
 128                 distance /= 4;
 129                 break;
 130             case 15:
 131                 angle = i_cur_angle + M_PI_F*3/4.0f;
 132                 distance /= 2;
 133                 break;
 134             case 16:
 135                 angle = i_cur_angle - M_PI_F*3/4.0f;
 136                 distance /= 2;
 137                 break;
 138             case 17:
 139                 angle = i_cur_angle + M_PI_F;
 140                 distance /= 2;
 141                 break;
 142         }
 143         temp_x = x + distance * cos(angle);
 144         temp_y = y + distance * sin(angle);
 145         MaNGOS::NormalizeMapCoord(temp_x);
 146         MaNGOS::NormalizeMapCoord(temp_y);
 147         if( owner.IsWithinLOS(temp_x,temp_y,z))
 148         {
 149             bool is_water_now = _map->IsInWater(x,y,z);
 150
 151             if(is_water_now && _map->IsInWater(temp_x,temp_y,z))
 152             {
 153                 x = temp_x;
 154                 y = temp_y;
 155                 return true;
 156             }
 157             float new_z = _map->GetHeight(temp_x,temp_y,z,true);
 158
 159             if(new_z <= INVALID_HEIGHT)
 160                 continue;
 161
 162             bool is_water_next = _map->IsInWater(temp_x,temp_y,new_z);
 163
 164             if((is_water_now && !is_water_next && !is_land_ok) || (!is_water_now && is_water_next && !is_water_ok))
 165                 continue;
 166
 167             if( !(new_z - z) || distance / fabs(new_z - z) > 1.0f)
 168             {
 169                 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);
 170                 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);
 171                 if(fabs(new_z_left - new_z) < 1.2f && fabs(new_z_right - new_z) < 1.2f)
 172                 {
 173                     x = temp_x;
 174                     y = temp_y;
 175                     z = new_z;
 176                     return true;
 177                 }
 178             }
 179         }
 180     }
 181     i_to_distance_from_caster = 0.0f;
 182     i_nextCheckTime.Reset( urand(500,1000) );
 183     return false;
 184 }
 185
 186 template<class T>
 187 bool
 188 FleeingMovementGenerator<T>::_setMoveData(T &owner)
 189 {
 190     float cur_dist_xyz = owner.GetDistance(i_caster_x, i_caster_y, i_caster_z);
 191
 192     if(i_to_distance_from_caster > 0.0f)
 193     {
 194         if((i_last_distance_from_caster > i_to_distance_from_caster && cur_dist_xyz < i_to_distance_from_caster)   ||
 195                                                             // if we reach lower distance
 196            (i_last_distance_from_caster > i_to_distance_from_caster && cur_dist_xyz > i_last_distance_from_caster) ||
 197                                                             // if we can't be close
 198            (i_last_distance_from_caster < i_to_distance_from_caster && cur_dist_xyz > i_to_distance_from_caster)   ||
 199                                                             // if we reach bigger distance
 200            (cur_dist_xyz > MAX_QUIET_DISTANCE) ||           // if we are too far
 201            (i_last_distance_from_caster > MIN_QUIET_DISTANCE && cur_dist_xyz < MIN_QUIET_DISTANCE) )
 202                                                             // if we leave 'quiet zone'
 203         {
 204             // we are very far or too close, stopping
 205             i_to_distance_from_caster = 0.0f;
 206             i_nextCheckTime.Reset( urand(500,1000) );
 207             return false;
 208         }
 209         else
 210         {
 211             // now we are running, continue
 212             i_last_distance_from_caster = cur_dist_xyz;
 213             return true;
 214         }
 215     }
 216
 217     float cur_dist;
 218     float angle_to_caster;
 219
 220     Unit * fright = ObjectAccessor::GetUnit(owner, i_frightGUID);
 221
 222     if(fright)
 223     {
 224         cur_dist = fright->GetDistance(&owner);
 225         if(cur_dist < cur_dist_xyz)
 226         {
 227             i_caster_x = fright->GetPositionX();
 228             i_caster_y = fright->GetPositionY();
 229             i_caster_z = fright->GetPositionZ();
 230             angle_to_caster = fright->GetAngle(&owner);
 231         }
 232         else
 233         {
 234             cur_dist = cur_dist_xyz;
 235             angle_to_caster = owner.GetAngle(i_caster_x, i_caster_y) + M_PI_F;
 236         }
 237     }
 238     else
 239     {
 240         cur_dist = cur_dist_xyz;
 241         angle_to_caster = owner.GetAngle(i_caster_x, i_caster_y) + M_PI_F;
 242     }
 243
 244     // if we too close may use 'path-finding' else just stop
 245     i_only_forward = cur_dist >= MIN_QUIET_DISTANCE/3;
 246
 247     //get angle and 'distance from caster' to run
 248     float angle;
 249
 250     if(i_cur_angle == 0.0f && i_last_distance_from_caster == 0.0f) //just started, first time
 251     {
 252         angle = rand_norm_f()*(1.0f - cur_dist/MIN_QUIET_DISTANCE) * M_PI_F/3 + rand_norm_f()*M_PI_F*2/3;
 253         i_to_distance_from_caster = MIN_QUIET_DISTANCE;
 254         i_only_forward = true;
 255     }
 256     else if(cur_dist < MIN_QUIET_DISTANCE)
 257     {
 258         angle = M_PI_F/6 + rand_norm_f()*M_PI_F*2/3;
 259         i_to_distance_from_caster = cur_dist*2/3 + rand_norm_f()*(MIN_QUIET_DISTANCE - cur_dist*2/3);
 260     }
 261     else if(cur_dist > MAX_QUIET_DISTANCE)
 262     {
 263         angle = rand_norm_f()*M_PI_F/3 + M_PI_F*2/3;
 264         i_to_distance_from_caster = MIN_QUIET_DISTANCE + 2.5f + rand_norm_f()*(MAX_QUIET_DISTANCE - MIN_QUIET_DISTANCE - 2.5f);
 265     }
 266     else
 267     {
 268         angle = rand_norm_f()*M_PI_F;
 269         i_to_distance_from_caster = MIN_QUIET_DISTANCE + 2.5f + rand_norm_f()*(MAX_QUIET_DISTANCE - MIN_QUIET_DISTANCE - 2.5f);
 270     }
 271
 272     int8 sign = rand_norm_f() > 0.5f ? 1 : -1;
 273     i_cur_angle = sign*angle + angle_to_caster;
 274
 275     // current distance
 276     i_last_distance_from_caster = cur_dist;
 277
 278     return true;
 279 }
 280
 281 template<class T>
 282 void
 283 FleeingMovementGenerator<T>::Initialize(T &owner)
 284 {
 285     owner.addUnitState(UNIT_STAT_FLEEING|UNIT_STAT_FLEEING_MOVE);
 286
 287     _Init(owner);
 288
 289     if(Unit * fright = ObjectAccessor::GetUnit(owner, i_frightGUID))
 290     {
 291         i_caster_x = fright->GetPositionX();
 292         i_caster_y = fright->GetPositionY();
 293         i_caster_z = fright->GetPositionZ();
 294     }
 295     else
 296     {
 297         i_caster_x = owner.GetPositionX();
 298         i_caster_y = owner.GetPositionY();
 299         i_caster_z = owner.GetPositionZ();
 300     }
 301
 302     i_only_forward = true;
 303     i_cur_angle = 0.0f;
 304     i_last_distance_from_caster = 0.0f;
 305     i_to_distance_from_caster = 0.0f;
 306     _setTargetLocation(owner);
 307 }
 308
 309 template<>
 310 void
 311 FleeingMovementGenerator<Creature>::_Init(Creature &owner)
 312 {
 313     owner.RemoveSplineFlag(SPLINEFLAG_WALKMODE);
 314     owner.SetTargetGUID(0);
 315     is_water_ok = owner.canSwim();
 316     is_land_ok  = owner.canWalk();
 317 }
 318
 319 template<>
 320 void
 321 FleeingMovementGenerator<Player>::_Init(Player &)
 322 {
 323     is_water_ok = true;
 324     is_land_ok  = true;
 325 }
 326
 327 template<>
 328 void FleeingMovementGenerator<Player>::Finalize(Player &owner)
 329 {
 330     owner.clearUnitState(UNIT_STAT_FLEEING|UNIT_STAT_FLEEING_MOVE);
 331 }
 332
 333 template<>
 334 void FleeingMovementGenerator<Creature>::Finalize(Creature &owner)
 335 {
 336     owner.AddSplineFlag(SPLINEFLAG_WALKMODE);
 337     owner.clearUnitState(UNIT_STAT_FLEEING|UNIT_STAT_FLEEING_MOVE);
 338 }
 339
 340 template<class T>
 341 void FleeingMovementGenerator<T>::Interrupt(T &owner)
 342 {
 343     // flee state still applied while movegen disabled
 344     owner.clearUnitState(UNIT_STAT_FLEEING_MOVE);
 345 }
 346
 347 template<class T>
 348 void FleeingMovementGenerator<T>::Reset(T &owner)
 349 {
 350     Initialize(owner);
 351 }
 352
 353 template<class T>
 354 bool FleeingMovementGenerator<T>::Update(T &owner, const uint32 & time_diff)
 355 {
 356     if( !&owner || !owner.isAlive() )
 357         return false;
 358
 359     // ignore in case other no reaction state
 360     if (owner.hasUnitState(UNIT_STAT_CAN_NOT_REACT & ~UNIT_STAT_FLEEING))
 361     {
 362         owner.clearUnitState(UNIT_STAT_FLEEING_MOVE);
 363         return true;
 364     }
 365
 366     Traveller<T> traveller(owner);
 367
 368     i_nextCheckTime.Update(time_diff);
 369
 370     if( (owner.IsStopped() && !i_destinationHolder.HasArrived()) || !i_destinationHolder.HasDestination() )
 371     {
 372         _setTargetLocation(owner);
 373         return true;
 374     }
 375
 376     if (i_destinationHolder.UpdateTraveller(traveller, time_diff, false))
 377     {
 378         if (!IsActive(owner))                               // force stop processing (movement can move out active zone with cleanup movegens list)
 379             return true;                                    // not expire now, but already lost
 380
 381         i_destinationHolder.ResetUpdate(50);
 382         if(i_nextCheckTime.Passed() && i_destinationHolder.HasArrived())
 383         {
 384             _setTargetLocation(owner);
 385             return true;
 386         }
 387     }
 388     return true;
 389 }
 390
 391 template void FleeingMovementGenerator<Player>::Initialize(Player &);
 392 template void FleeingMovementGenerator<Creature>::Initialize(Creature &);
 393 template bool FleeingMovementGenerator<Player>::_setMoveData(Player &);
 394 template bool FleeingMovementGenerator<Creature>::_setMoveData(Creature &);
 395 template bool FleeingMovementGenerator<Player>::_getPoint(Player &, float &, float &, float &);
 396 template bool FleeingMovementGenerator<Creature>::_getPoint(Creature &, float &, float &, float &);
 397 template void FleeingMovementGenerator<Player>::_setTargetLocation(Player &);
 398 template void FleeingMovementGenerator<Creature>::_setTargetLocation(Creature &);
 399 template void FleeingMovementGenerator<Player>::Interrupt(Player &);
 400 template void FleeingMovementGenerator<Creature>::Interrupt(Creature &);
 401 template void FleeingMovementGenerator<Player>::Reset(Player &);
 402 template void FleeingMovementGenerator<Creature>::Reset(Creature &);
 403 template bool FleeingMovementGenerator<Player>::Update(Player &, const uint32 &);
 404 template bool FleeingMovementGenerator<Creature>::Update(Creature &, const uint32 &);
 405
 406 void TimedFleeingMovementGenerator::Finalize(Unit &owner)
 407 {
 408     owner.clearUnitState(UNIT_STAT_FLEEING|UNIT_STAT_FLEEING_MOVE);
 409     if (Unit* victim = owner.getVictim())
 410     {
 411         if (owner.isAlive())
 412         {
 413             owner.AttackStop(true);
 414             ((Creature*)&owner)->AI()->AttackStart(victim);
 415         }
 416     }
 417 }
 418
 419 bool TimedFleeingMovementGenerator::Update(Unit & owner, const uint32 & time_diff)
 420 {
 421     if( !owner.isAlive() )
 422         return false;
 423
 424     // ignore in case other no reaction state
 425     if (owner.hasUnitState(UNIT_STAT_CAN_NOT_REACT & ~UNIT_STAT_FLEEING))
 426     {
 427         owner.clearUnitState(UNIT_STAT_FLEEING_MOVE);
 428         return true;
 429     }
 430
 431     i_totalFleeTime.Update(time_diff);
 432     if (i_totalFleeTime.Passed())
 433         return false;
 434
 435     // This calls grant-parent Update method hiden by FleeingMovementGenerator::Update(Creature &, const uint32 &) version
 436     // This is done instead of casting Unit& to Creature& and call parent method, then we can use Unit directly
 437     return MovementGeneratorMedium< Creature, FleeingMovementGenerator<Creature> >::Update(owner, time_diff);
 438 }