Create Box3d structure.

Dashboard/Box3d.cs

@@ -0,0 +1,31 @@
+using System.Numerics;
+
+namespace Dashboard
+{
+    public readonly record struct Box3d(Vector3 Min, Vector3 Max)
+    {
+        public float Left => Min.X;
+        public float Right => Max.X;
+        public float Top => Min.Y;
+        public float Bottom => Max.Y;
+        public float Far => Min.Z;
+        public float Near => Max.Z;
+
+        public Vector3 Size => Max - Min;
+        public Vector3 Center => Min + Size / 2f;
+
+        public static Box3d Union(Box3d left, Box3d right)
+        {
+            Vector3 min = Vector3.Min(left.Min, right.Min);
+            Vector3 max = Vector3.Max(left.Max, right.Max);
+            return new Box3d(min, max);
+        }
+
+        public static Box3d Intersect(Box3d left, Box3d right)
+        {
+            Vector3 min = Vector3.Max(left.Min, right.Min);
+            Vector3 max = Vector3.Min(left.Max, right.Max);
+            return new Box3d(min, max);
+        }
+    }
+}

Dashboard/Class1.cs

@@ -1,6 +0,0 @@
-namespace Dashboard;
-
-public class Class1
-{
-
-}