Merge pull request #422 from chuongmep/fix_json

Fix bug DeserializeObject boundingbox exception

Author: d3ssy

src/GShark/Geometry/BoundingBox.cs

@@ -11,6 +11,14 @@ namespace GShark.Geometry
     /// </summary>
     public class BoundingBox
     {
+        /// <summary>
+        /// Constructs a new bounding box with a default transform and extents of (-100, -100, -100) to (100, 100, 100).
+        /// </summary>
+        public BoundingBox()
+        {
+            Min = new Point3(-100, -100, -100);
+            Max = new Point3(100, 100, 100);
+        }
         /// <summary>
         /// Constructs a new bounding box from two corner points.
         /// </summary>