Core/Movement: Allow waypoints to use 0 as valid facing value

Port From (https://github.com/TrinityCore/TrinityCore/commit/8501fb572a38b7d278c6e37d7b32164c63771550)

Source/Game/AI/SmartScripts/SmartAIManager.cs

@@ -352,7 +352,9 @@ namespace Game.AI
                 float x = result.Read<float>(2);
                 float y = result.Read<float>(3);
                 float z = result.Read<float>(4);
-                float o = result.Read<float>(5);
+                float? o = null;
+                if (!result.IsNull(5))
+                    o = result.Read<float>(5);
                 uint delay = result.Read<uint>(6);
 
                 if (lastEntry != entry)

Source/Game/Movement/Generators/WaypointMovement.cs

@@ -351,9 +351,8 @@ namespace Game.Movement
             //! but formationDest contains global coordinates
             init.MoveTo(waypoint.x, waypoint.y, waypoint.z);
 
-            //! Accepts angles such as 0.00001 and -0.00001, 0 must be ignored, default value in waypoint table
-            if (waypoint.orientation != 0 && waypoint.delay != 0)
-                init.SetFacing(waypoint.orientation);
+            if (waypoint.orientation.HasValue && waypoint.delay != 0)
+                init.SetFacing(waypoint.orientation.Value);
 
             switch (waypoint.moveType)
             {

Source/Game/Movement/WaypointManager.cs

@@ -47,7 +47,9 @@ namespace Game
                 float x = result.Read<float>(2);
                 float y = result.Read<float>(3);
                 float z = result.Read<float>(4);
-                float o = result.Read<float>(5);
+                float? o = null;
+                if (!result.IsNull(5))
+                    o = result.Read<float>(5);
 
                 GridDefines.NormalizeMapCoord(ref x);
                 GridDefines.NormalizeMapCoord(ref y);
@@ -100,7 +102,9 @@ namespace Game
                 float x = result.Read<float>(1);
                 float y = result.Read<float>(2);
                 float z = result.Read<float>(3);
-                float o = result.Read<float>(4);
+                float? o = null;
+                if (!result.IsNull(4))
+                    o = result.Read<float>(4);
 
                 GridDefines.NormalizeMapCoord(ref x);
                 GridDefines.NormalizeMapCoord(ref y);
@@ -141,7 +145,7 @@ namespace Game
     public class WaypointNode
     {
         public WaypointNode() { moveType = WaypointMoveType.Run; }
-        public WaypointNode(uint _id, float _x, float _y, float _z, float _orientation = 0.0f, uint _delay = 0)
+        public WaypointNode(uint _id, float _x, float _y, float _z, float? _orientation = null, uint _delay = 0)
         {
             id = _id;
             x = _x;
@@ -155,7 +159,8 @@ namespace Game
         }
 
         public uint id;
-        public float x, y, z, orientation;
+        public float x, y, z;
+        public float? orientation;
         public uint delay;
         public uint eventId;
         public WaypointMoveType moveType;

Source/Game/Scripting/ScriptManager.cs

@@ -246,7 +246,7 @@ namespace Game.Scripting
 
                 WaypointPath path = _waypointStore[entry];
                 path.id = entry;
-                path.nodes.Add(new WaypointNode(id, x, y, z, 0.0f, waitTime));
+                path.nodes.Add(new WaypointNode(id, x, y, z, null, waitTime));
 
                 ++count;
             }