player added

AABB.cs

@@ -0,0 +1,41 @@
+using OpenTK.Mathematics;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Voxel
+{
+    public struct AABB
+    {
+        public Vector3 Min;
+        public Vector3 Max;
+
+        public AABB(Vector3 min, Vector3 max)
+        {
+            Min = min;
+            Max = max;
+        }
+
+        public static AABB FromCenter(Vector3 center, float width, float height, float depth)
+        {
+            Vector3 half = new Vector3(width / 2f, 0, depth / 2f);
+            return new AABB(center - half, center + new Vector3(half.X, height, half.Z));
+        }
+
+        public bool Intersects(AABB other)
+        {
+            return (Min.X <= other.Max.X && Max.X >= other.Min.X) &&
+                   (Min.Y <= other.Max.Y && Max.Y >= other.Min.Y) &&
+                   (Min.Z <= other.Max.Z && Max.Z >= other.Min.Z);
+        }
+
+        public bool Contains(Vector3 point)
+        {
+            return (point.X >= Min.X && point.X <= Max.X) &&
+                   (point.Y >= Min.Y && point.Y <= Max.Y) &&
+                   (point.Z >= Min.Z && point.Z <= Max.Z);
+        }
+    }
+}