Core/Movement: Ensure land and takeoff animations even if gravity enabled/disabled state is not what spline generator expects

(cherry picked from commit be3ae90dc488894afea8e4cca74d9105558fff53)

5 files changed, 28 insertions, 23 deletions

diff --git a/src/server/game/Entities/Unit/Unit.cpp b/src/server/game/Entities/Unit/Unit.cpp
index ca0374e1822..3d282059c65 100644
--- a/src/server/game/Entities/Unit/Unit.cpp
+++ b/src/server/game/Entities/Unit/Unit.cpp
@@ -12734,16 +12734,6 @@ bool Unit::SetDisableGravity(bool disable, bool updateAnimTier /*= true*/)
         SendMessageToSet(packet.Write(), true);
     }
 
-    if (IsCreature() && updateAnimTier && IsAlive() && !HasUnitState(UNIT_STATE_ROOT))
-    {
-        if (IsGravityDisabled())
-            SetAnimTier(AnimTier::Fly);
-        else if (IsHovering())
-            SetAnimTier(AnimTier::Hover);
-        else
-            SetAnimTier(AnimTier::Ground);
-    }
-
     if (IsAlive())
     {
         if (IsGravityDisabled() || IsHovering())
@@ -12754,6 +12744,16 @@ bool Unit::SetDisableGravity(bool disable, bool updateAnimTier /*= true*/)
     else if (IsPlayer()) // To update player who dies while flying/hovering
         SetPlayHoverAnim(false, false);
 
+    if (IsCreature() && updateAnimTier && IsAlive() && !HasUnitState(UNIT_STATE_ROOT))
+    {
+        if (IsGravityDisabled())
+            SetAnimTier(AnimTier::Fly);
+        else if (IsHovering())
+            SetAnimTier(AnimTier::Hover);
+        else
+            SetAnimTier(AnimTier::Ground);
+    }
+
     return true;
 }
 
@@ -12960,16 +12960,6 @@ bool Unit::SetHover(bool enable, bool updateAnimTier /*= true*/)
         SendMessageToSet(packet.Write(), true);
     }
 
-    if (IsCreature() && updateAnimTier && IsAlive() && !HasUnitState(UNIT_STATE_ROOT))
-    {
-        if (IsGravityDisabled())
-            SetAnimTier(AnimTier::Fly);
-        else if (IsHovering())
-            SetAnimTier(AnimTier::Hover);
-        else
-            SetAnimTier(AnimTier::Ground);
-    }
-
     if (IsAlive())
     {
         if (IsGravityDisabled() || IsHovering())
@@ -12980,6 +12970,16 @@ bool Unit::SetHover(bool enable, bool updateAnimTier /*= true*/)
     else if (IsPlayer()) // To update player who dies while flying/hovering
         SetPlayHoverAnim(false, false);
 
+    if (IsCreature() && updateAnimTier && IsAlive() && !HasUnitState(UNIT_STATE_ROOT))
+    {
+        if (IsGravityDisabled())
+            SetAnimTier(AnimTier::Fly);
+        else if (IsHovering())
+            SetAnimTier(AnimTier::Hover);
+        else
+            SetAnimTier(AnimTier::Ground);
+    }
+
     return true;
 }
 
diff --git a/src/server/game/Movement/MotionMaster.cpp b/src/server/game/Movement/MotionMaster.cpp
index 7b43eea41ae..aec3bc208a8 100644
--- a/src/server/game/Movement/MotionMaster.cpp
+++ b/src/server/game/Movement/MotionMaster.cpp
@@ -713,6 +713,8 @@ void MotionMaster::MoveLand(uint32 id, Position const& pos, Optional<int32> tier
     {
         init.MoveTo(PositionToVector3(pos), false);
         init.SetAnimation(AnimTier::Ground, tierTransitionId.value_or(1));
+        init.SetFly(); // ensure smooth animation even if gravity is enabled before calling this function
+        init.SetSmooth();
         switch (speedSelectionMode)
         {
             case MovementWalkRunSpeedSelectionMode::ForceRun:
@@ -740,7 +742,8 @@ void MotionMaster::MoveTakeoff(uint32 id, Position const& pos, Optional<int32> t
     std::function<void(Movement::MoveSplineInit&)> initializer = [=](Movement::MoveSplineInit& init)
     {
         init.MoveTo(PositionToVector3(pos), false);
-        init.SetAnimation(AnimTier::Hover, tierTransitionId.value_or(15));
+        init.SetAnimation(AnimTier::Fly, tierTransitionId.value_or(2));
+        init.SetFly(); // ensure smooth animation even if gravity is disabled after calling this function
         switch (speedSelectionMode)
         {
             case MovementWalkRunSpeedSelectionMode::ForceRun:
diff --git a/src/server/game/Movement/MovementGenerator.cpp b/src/server/game/Movement/MovementGenerator.cpp
index 38844c0d821..d1fc73d6dd1 100644
--- a/src/server/game/Movement/MovementGenerator.cpp
+++ b/src/server/game/Movement/MovementGenerator.cpp
@@ -27,6 +27,7 @@
 
 MovementGenerator::~MovementGenerator()
 {
+    // Ensure script doesn't get stuck waiting for this movement
     SetScriptResult(MovementStopReason::Interrupted);
 }
 
diff --git a/src/server/game/Movement/Spline/MoveSplineInit.h b/src/server/game/Movement/Spline/MoveSplineInit.h
index 55e9db456b8..8be00f741bb 100644
--- a/src/server/game/Movement/Spline/MoveSplineInit.h
+++ b/src/server/game/Movement/Spline/MoveSplineInit.h
@@ -207,7 +207,8 @@ namespace Movement
         args.animTier.emplace();
         args.animTier->TierTransitionId = tierTransitionId;
         args.animTier->AnimTier = anim;
-        args.flags.EnableAnimation();
+        if (!tierTransitionId)
+            args.flags.EnableAnimation();
     }
 
     inline void MoveSplineInit::DisableTransportPathTransformations() { args.TransformForTransport = false; }
diff --git a/src/server/game/Server/Packets/MovementPackets.cpp b/src/server/game/Server/Packets/MovementPackets.cpp
index 7c2bc3206eb..2396bfde98b 100644
--- a/src/server/game/Server/Packets/MovementPackets.cpp
+++ b/src/server/game/Server/Packets/MovementPackets.cpp
@@ -513,7 +513,7 @@ void WorldPackets::Movement::MonsterMove::InitializeSplineData(::Movement::MoveS
     movementSpline.FaceGUID = moveSpline.facing.target;
     movementSpline.FaceSpot = Position(moveSpline.facing.f.x, moveSpline.facing.f.y, moveSpline.facing.f.z);
 
-    if (splineFlags.animation)
+    if (moveSpline.anim_tier)
     {
         movementSpline.AnimTierTransition.emplace();
         movementSpline.AnimTierTransition->TierTransitionID = moveSpline.anim_tier->TierTransitionId;