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Core/Movement: Fix a potential crash on newly created pets.

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Port From (https://github.com/TrinityCore/TrinityCore/commit/3d9d6fbcb80eaab72acbe6ef09b9b1c29f2439c7)
This commit is contained in:
hondacrx
2021-09-26 10:31:46 -04:00
parent ad1975b277
commit 9d5cf1d4ae
3 changed files with 13 additions and 8 deletions
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Source/Game/Entities/Unit/Unit.Movement.cs
+1 -1
View File
@@ -523,7 +523,7 @@ namespace Game.Entities
if (creature.HasUnitTypeMask(UnitTypeMask.Minion) && !creature.IsInCombat())
{
var top = creature.GetMotionMaster().Top();
var top = creature.GetMotionMaster().TopOrNull();
if (top != null && top.GetMovementGeneratorType() == MovementGeneratorType.Follow)
{
Unit followed = ((AbstractFollower)top).GetTarget();
Source/Game/Movement/Generators/ChaseMovementGenerator.cs
+7 -7
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@@ -73,12 +73,12 @@ namespace Game.Movement
return true;
}
bool mutualChase = IsMutualChase(owner, target);
float hitboxSum = owner.GetCombatReach() + target.GetCombatReach();
float minRange = _range.HasValue ? _range.Value.MinRange + hitboxSum : SharedConst.ContactDistance;
float minTarget = (_range.HasValue ? _range.Value.MinTolerance : 0.0f) + hitboxSum;
float maxRange = _range.HasValue ? _range.Value.MaxRange + hitboxSum : owner.GetMeleeRange(target); // melee range already includes hitboxes
float maxTarget = _range.HasValue ? _range.Value.MaxTolerance + hitboxSum : SharedConst.ContactDistance + hitboxSum;
bool mutualChase = IsMutualChase(owner, target);
float hitboxSum = owner.GetCombatReach() + target.GetCombatReach();
float minRange = _range.HasValue ? _range.Value.MinRange + hitboxSum : SharedConst.ContactDistance;
float minTarget = (_range.HasValue ? _range.Value.MinTolerance : 0.0f) + hitboxSum;
float maxRange = _range.HasValue ? _range.Value.MaxRange + hitboxSum : owner.GetMeleeRange(target); // melee range already includes hitboxes
float maxTarget = _range.HasValue ? _range.Value.MaxTolerance + hitboxSum : SharedConst.ContactDistance + hitboxSum;
ChaseAngle? angle = mutualChase ? null : _angle;
// if we're already moving, periodically check if we're already in the expected range...
@@ -195,7 +195,7 @@ namespace Game.Movement
static bool IsMutualChase(Unit owner, Unit target)
{
IMovementGenerator gen = target.GetMotionMaster().Top();
IMovementGenerator gen = target.GetMotionMaster().TopOrNull();
if (gen == null || gen.GetMovementGeneratorType() != MovementGeneratorType.Chase)
return false;
return ((ChaseMovementGenerator)gen).GetTarget() == owner;
Source/Game/Movement/MotionMaster.cs
+5
View File
@@ -804,6 +804,11 @@ namespace Game.Movement
int Size() { return _top + 1; }
public IMovementGenerator TopOrNull()
{
return Empty() ? null : Top();
}
public IMovementGenerator Top()
{
Cypher.Assert(!Empty());