+ comments to the SM.Base

+ Length, Normalize methods for CVectors

SMCode/SM.Base/Objects/Mesh.cs

@@ -1,5 +1,6 @@
 #region usings
 
+using OpenTK.Graphics.OpenGL4;
 using SM.OGL.Mesh;
 
 #endregion
@@ -12,14 +13,15 @@ namespace SM.Base.Objects
         /// <summary>
         ///     While initializing, it will add the <see cref="Color" /> to the data index.
         /// </summary>
-        public Mesh()
+        public Mesh(PrimitiveType type)
         {
+            PrimitiveType = type;
             Attributes.Add(3, "color", Color);
         }
 
         /// <summary>
         ///     Contains vertex colors
         /// </summary>
-        public virtual VBO Color { get; }
+        public virtual VBO Color { get; protected set; }
     }
 }