[svn] Implemented player on player and player on creature possession:

* Implemented packet and vision forwarding through possessed units * Added new OnPossess script call alerting scripts on when possession is applied/removed * Moved fall damage and fall under map calculations into the Player class * Added new PossessedAI that is applied only while possession on creature is active * Implemented summon possessed spell effect * Fixed Eyes of the Beast --HG-- branch : trunk
2026-01-23 10:26:28 +01:00 · 2008-11-05 20:51:05 -06:00
parent 8d331f2b10
commit 44bdb135f4
41 changed files with 1105 additions and 374 deletions
--- a/src/game/PossessedAI.cpp
+++ b/src/game/PossessedAI.cpp
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2008 Trinity <http://www.trinitycore.org/>
+ *
+ * Thanks to the original authors: MaNGOS <http://www.mangosproject.org/>
+ *
+ * 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 "PossessedAI.h"
+#include "Creature.h"
+#include "World.h"
+
+void PossessedAI::AttackStart(Unit *u)
+{
+    if( i_pet.getVictim() || !u )
+        return;
+
+    if(i_pet.Attack(u, true))
+        i_victimGuid = u->GetGUID();
+
+    // Do not autochase our target, and also make sure our current movement generator
+    // is removed since the motion master is reset before this function is called
+    i_pet.GetMotionMaster()->Clear(false);
+    i_pet.GetMotionMaster()->MoveIdle();
+}
+
+bool PossessedAI::_needToStop() const
+{
+    if(!i_pet.getVictim() || !i_pet.isAlive())
+        return true;
+
+    // This is needed for charmed creatures, as once their target was reset other effects can trigger threat
+    if(i_pet.getVictim() == i_pet.GetCharmer())
+        return true;
+
+    return !i_pet.getVictim()->isTargetableForAttack();
+}
+
+void PossessedAI::_stopAttack()
+{
+    if( !i_victimGuid )
+        return;
+
+    Unit* victim = Unit::GetUnit(i_pet, i_victimGuid );
+
+    if ( !victim )
+        return;
+
+    assert(!i_pet.getVictim() || i_pet.getVictim() == victim);
+
+    if( !i_pet.isAlive() )
+    {
+        i_pet.StopMoving();
+        i_pet.GetMotionMaster()->Clear(false);
+        i_pet.GetMotionMaster()->MoveIdle();
+        i_victimGuid = 0;
+        i_pet.CombatStop();
+        i_pet.getHostilRefManager().deleteReferences();
+
+        return;
+    }
+
+    i_pet.GetMotionMaster()->Clear(false);
+    i_pet.GetMotionMaster()->MoveIdle();
+    i_victimGuid = 0;
+    i_pet.AttackStop();
+}
+
+void PossessedAI::UpdateAI(const uint32 diff)
+{
+    // update i_victimGuid if i_pet.getVictim() !=0 and changed
+    if(i_pet.getVictim())
+        i_victimGuid = i_pet.getVictim()->GetGUID();
+
+    // i_pet.getVictim() can't be used for check in case stop fighting, i_pet.getVictim() clear at Unit death etc.
+    if( i_victimGuid )
+    {
+        if( _needToStop() )
+        {
+            _stopAttack();                                  // i_victimGuid == 0 && i_pet.getVictim() == NULL now
+            return;
+        }
+        else if(i_pet.IsWithinCombatDist(i_pet.getVictim(), ATTACK_DISTANCE) && i_pet.isAttackReady())
+        {
+            i_pet.AttackerStateUpdate(i_pet.getVictim());
+
+            i_pet.resetAttackTimer();
+
+            if( _needToStop() )
+                _stopAttack();
+        }
+    }
+}
+
+bool PossessedAI::_isVisible(Unit *u) const
+{
+    return i_pet.GetDistance(u) < sWorld.getConfig(CONFIG_SIGHT_MONSTER)
+        && u->isVisibleForOrDetect(&i_pet,true);
+}
+
+void PossessedAI::JustDied(Unit *u)
+{
+    // We died while possessed, disable our loot
+    i_pet.RemoveFlag(UNIT_DYNAMIC_FLAGS, UNIT_DYNFLAG_LOOTABLE);
+}
+
+void PossessedAI::KilledUnit(Unit* victim)
+{
+    // We killed a creature, disable victim's loot
+    if (victim->GetTypeId() == TYPEID_UNIT)
+        victim->RemoveFlag(UNIT_DYNAMIC_FLAGS, UNIT_DYNFLAG_LOOTABLE);
+}