Updated Double4.h and Double4.cpp

Added a constructor with Vector4 input and cleaned up some documentation.

Source/Engine/Core/Math/Double4.cpp

@@ -54,6 +54,14 @@ Double4::Double4(const Vector3& xyz, double w)
 {
 }
 
+Double4::Double4(const Vector4& xyzw)
+    : X(xyzw.X)
+    , Y(xyzw.Y)
+    , Z(xyzw.Z)
+    , W(xyzw.W)
+{
+}
+
 Double4::Double4(const Int2& xy, double z, double w)
     : X(static_cast<double>(xy.X))
     , Y(static_cast<double>(xy.Y))

Source/Engine/Core/Math/Double4.h

@@ -131,14 +131,16 @@ public:
     // Init
     // @param xy X and Y values in the vector
     // @param zw Z and W values in the vector
-    // @param z Z component value
-    // @param w W component value
     explicit Double4(const Vector2& xy, const Vector2& zw);
 
     // Init
     // @param xyz X, Y and Z values in the vector
     // @param w W component value
     explicit Double4(const Vector3& xyz, double w);
+    
+    // Init
+    // @param xyzw Vector4 value
+    explicit Double4(const Vector4& xyzw);
 
     // Init
     // @param xy X and Y values in the vector
@@ -152,7 +154,7 @@ public:
     explicit Double4(const Int3& xyz, double w);
     
     // Init
-    // @param color Int4 value
+    // @param xyzw Int4 value
     explicit Double4(const Int4& xyzw);
 
     // Init