Add AbstractGameRule.cs & derived classes

PckStudio.Core/GameRule/UpdatePlayer.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Numerics;
+using System.Text;
+using System.Threading.Tasks;
+using OMI.Formats.GameRule;
+
+namespace PckStudio.Core.GameRule
+{
+    internal sealed class UpdatePlayer : AbstractGameRule
+    {
+        private Vector3 _spawn;
+        private Vector2 _rot;
+
+        public UpdatePlayer(Vector3 spawn, Vector2 rot)
+        {
+            _spawn = spawn;
+            _rot = rot;
+        }
+
+        protected override GameRuleFile.GameRule GetGameRule()
+        {
+            var gameRule = new GameRuleFile.GameRule("UpdatePlayer");
+            gameRule.AddParameters(
+                new GameRuleFile.IntParameter("x", (int)_spawn.X),
+                new GameRuleFile.IntParameter("y", (int)_spawn.Y),
+                new GameRuleFile.IntParameter("z", (int)_spawn.Z),
+                new GameRuleFile.IntParameter("xRot", (int)_rot.X),
+                new GameRuleFile.IntParameter("yRot", (int)_rot.Y)
+                );
+            return gameRule;
+        }
+    }
+}