Move Common functionality to Core project & rendering and Model support as well

PckStudio.Core/BoundingBox.cs

@@ -0,0 +1,37 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using PckStudio.Core.Extensions;
+
+namespace PckStudio.Core
+{
+    public struct BoundingBox
+    {
+        public static BoundingBox Empty = new BoundingBox(OpenTK.Vector3.Zero, OpenTK.Vector3.Zero);
+
+        public readonly OpenTK.Vector3 Start;
+        public readonly OpenTK.Vector3 End;
+        public readonly OpenTK.Vector3 Center;
+        public readonly OpenTK.Vector3 Volume;
+
+        public BoundingBox(OpenTK.Vector3 start, OpenTK.Vector3 end)
+        {
+            Start = start;
+            End = end;
+            OpenTK.Vector3 size = End - Start;
+            Volume = OpenTKExtensions.Abs(size);
+            Center = start + Volume / 2;
+        }
+
+        public BoundingBox(System.Numerics.Vector3 start, System.Numerics.Vector3 end)
+            : this(start.ToOpenTKVector(), end.ToOpenTKVector())
+        {
+        }
+
+        public OpenTK.Matrix4 GetTransform()
+        {
+            return OpenTK.Matrix4.CreateScale(Volume) * OpenTK.Matrix4.CreateTranslation(Start);
+        }
+    }
+}