Core/Movement: Implement initializing parabolic splines using jump gravity instead of max parabolic height

Port From (https://github.com/TrinityCore/TrinityCore/commit/684cd9d9681466019dcd06ad6f994890cff8cb2e)

Source/Game/Movement/MotionMaster.cs

@@ -736,6 +736,38 @@ namespace Game.Movement
             Add(movement);
         }
 
+        void MoveJumpWithGravity(Position pos, float speedXY, float gravity, uint id = EventId.Jump, bool hasOrientation = false, JumpArrivalCastArgs arrivalCast = null, SpellEffectExtraData spellEffectExtraData = null)
+        {
+            Log.outDebug(LogFilter.Movement, $"MotionMaster.MoveJumpWithGravity: '{_owner.GetGUID()}', jumps to point Id: {id} ({pos})");
+            if (speedXY < 0.01f)
+                return;
+
+            MoveSplineInit init = new(_owner);
+            init.MoveTo(pos.GetPositionX(), pos.GetPositionY(), pos.GetPositionZ(), false);
+            init.SetParabolicVerticalAcceleration(gravity, 0);
+            init.SetUncompressed();
+            init.SetVelocity(speedXY);
+
+            if (hasOrientation)
+                init.SetFacing(pos.GetOrientation());
+
+            if (spellEffectExtraData != null)
+                init.SetSpellEffectExtraData(spellEffectExtraData);
+
+            uint arrivalSpellId = 0;
+            ObjectGuid arrivalSpellTargetGuid = default;
+            if (arrivalCast != null)
+            {
+                arrivalSpellId = arrivalCast.SpellId;
+                arrivalSpellTargetGuid = arrivalCast.Target;
+            }
+
+            GenericMovementGenerator movement = new GenericMovementGenerator(init, MovementGeneratorType.Effect, id, arrivalSpellId, arrivalSpellTargetGuid);
+            movement.Priority = MovementGeneratorPriority.Highest;
+            movement.BaseUnitState = UnitState.Jumping;
+            Add(movement);
+        }
+        
         public void MoveCirclePath(float x, float y, float z, float radius, bool clockwise, byte stepCount)
         {
             float step = 2 * MathFunctions.PI / stepCount * (clockwise ? -1.0f : 1.0f);

Source/Game/Movement/MoveSpline.cs

@@ -70,9 +70,16 @@ namespace Game.Movement
                 effect_start_time = (int)(Duration() * args.time_perc);
                 if (args.flags.HasFlag(SplineFlag.Parabolic) && effect_start_time < Duration())
                 {
-                    float f_duration = (float)TimeSpan.FromMilliseconds(Duration() - effect_start_time).TotalSeconds;
+                    if (args.parabolic_amplitude != 0.0f)
+                    {
+                        float f_duration = MSToSec((uint)(Duration() - effect_start_time));
                         vertical_acceleration = args.parabolic_amplitude * 8.0f / (f_duration * f_duration);
                     }
+                    else if (args.vertical_acceleration != 0.0f)
+                    {
+                        vertical_acceleration = args.vertical_acceleration;
+                    }
+                }
             }
         }
 

Source/Game/Movement/MoveSplineInit.cs

@@ -293,6 +293,15 @@ namespace Game.Movement
         {
             args.time_perc = time_shift;
             args.parabolic_amplitude = amplitude;
+            args.vertical_acceleration = 0.0f;
+            args.flags.EnableParabolic();
+        }
+
+        public void SetParabolicVerticalAcceleration(float vertical_acceleration, float time_shift)
+        {
+            args.time_perc = time_shift;
+            args.parabolic_amplitude = 0.0f;
+            args.vertical_acceleration = vertical_acceleration;
             args.flags.EnableParabolic();
         }
 

Source/Game/Movement/MoveSplineInitArgs.cs

@@ -42,6 +42,7 @@ namespace Game.Movement
         public int path_Idx_offset;
         public float velocity;
         public float parabolic_amplitude;
+        public float vertical_acceleration;
         public float time_perc;
         public uint splineId;
         public float initialOrientation;

Source/Game/Networking/Packets/MovementPackets.cs

@@ -208,7 +208,7 @@ namespace Game.Networking.Packets
                 data.WriteBits(moveSpline.GetPath().Length, 16);
                 data.WriteBit(false);                                       // HasSplineFilter
                 data.WriteBit(moveSpline.spell_effect_extra.HasValue);  // HasSpellEffectExtraData
-                data.WriteBit(moveSpline.splineflags.HasFlag(SplineFlag.Parabolic));        // HasJumpExtraData
+                bool hasJumpExtraData = data.WriteBit(moveSpline.splineflags.HasFlag(SplineFlag.Parabolic) && (!moveSpline.spell_effect_extra.HasValue || moveSpline.effect_start_time != 0));
                 data.WriteBit(moveSpline.anim_tier.HasValue);                   // HasAnimationTierTransition
                 data.WriteBit(false);                                                   // HasUnknown901
                 data.FlushBits();
@@ -253,7 +253,7 @@ namespace Game.Networking.Packets
                     data.WriteUInt32(moveSpline.spell_effect_extra.Value.ParabolicCurveId);
                 }
 
-                if (moveSpline.splineflags.HasFlag(SplineFlag.Parabolic))
+                if (hasJumpExtraData)
                 {
                     data.WriteFloat(moveSpline.vertical_acceleration);
                     data.WriteInt32(moveSpline.effect_start_time);
@@ -385,7 +385,7 @@ namespace Game.Networking.Packets
 
             movementSpline.MoveTime = (uint)moveSpline.Duration();
 
-            if (splineFlags.HasFlag(SplineFlag.Parabolic))
+            if (splineFlags.HasFlag(SplineFlag.Parabolic) && (!moveSpline.spell_effect_extra.HasValue || moveSpline.effect_start_time != 0))
             {
                 movementSpline.JumpExtraData.HasValue = true;
                 movementSpline.JumpExtraData.Value.JumpGravity = moveSpline.vertical_acceleration;