Core/Entities: Some changes to LoS z checking & MotionMaster::MoveJumpTo (PR #20970)

- Use Midsection height for LoS checking.
- Changed MotionMaster::MoveJumpTo to use correct z. This change also makes sure the _owner will jump towards the given angle. Instead of jumping to a unintended angle if the first one is not in LoS.

2 files changed, 11 insertions, 3 deletions

diff --git a/src/server/game/Entities/Object/Object.cpp b/src/server/game/Entities/Object/Object.cpp
index 1a94b420b4c..51b2b2503bc 100644
--- a/src/server/game/Entities/Object/Object.cpp
+++ b/src/server/game/Entities/Object/Object.cpp
@@ -1217,7 +1217,7 @@ bool WorldObject::IsWithinDistInMap(WorldObject const* obj, float dist2compare,
 
 Position WorldObject::GetHitSpherePointFor(Position const& dest) const
 {
-    G3D::Vector3 vThis(GetPositionX(), GetPositionY(), GetPositionZ());
+    G3D::Vector3 vThis(GetPositionX(), GetPositionY(), GetPositionZ() + GetMidsectionHeight());
     G3D::Vector3 vObj(dest.GetPositionX(), dest.GetPositionY(), dest.GetPositionZ());
     G3D::Vector3 contactPoint = vThis + (vObj - vThis).directionOrZero() * std::min(dest.GetExactDist(GetPosition()), GetCombatReach());
 
@@ -1230,11 +1230,14 @@ bool WorldObject::IsWithinLOS(float ox, float oy, float oz, LineOfSightChecks ch
     {
         float x, y, z;
         if (GetTypeId() == TYPEID_PLAYER)
+        {
             GetPosition(x, y, z);
+            z += GetMidsectionHeight();
+        }
         else
             GetHitSpherePointFor({ ox, oy, oz }, x, y, z);
 
-        return GetMap()->isInLineOfSight(x, y, z + 2.0f, ox, oy, oz + 2.0f, GetPhaseMask(), checks, ignoreFlags);
+        return GetMap()->isInLineOfSight(x, y, z, ox, oy, oz, GetPhaseMask(), checks, ignoreFlags);
     }
 
     return true;
@@ -1247,9 +1250,12 @@ bool WorldObject::IsWithinLOSInMap(WorldObject const* obj, LineOfSightChecks che
 
     float x, y, z;
     if (obj->GetTypeId() == TYPEID_PLAYER)
+    {
         obj->GetPosition(x, y, z);
+        z += GetMidsectionHeight();
+    }
     else
-        obj->GetHitSpherePointFor(GetPosition(), x, y, z);
+        obj->GetHitSpherePointFor({ GetPositionX(), GetPositionY(), GetPositionZ() + GetMidsectionHeight() }, x, y, z);
 
     return IsWithinLOS(x, y, z, checks, ignoreFlags);
 }
diff --git a/src/server/game/Entities/Object/Object.h b/src/server/game/Entities/Object/Object.h
index 2d94496e20b..cbbc452e591 100644
--- a/src/server/game/Entities/Object/Object.h
+++ b/src/server/game/Entities/Object/Object.h
@@ -442,6 +442,8 @@ class TC_GAME_API WorldObject : public Object, public WorldLocation
         virtual float GetStationaryO() const { return GetOrientation(); }
 
         float GetFloorZ() const;
+        virtual float GetCollisionHeight() const { return 0.0f; }
+        float GetMidsectionHeight() const { return GetCollisionHeight() / 2.0f; }
 
     protected:
         std::string m_name;