Add helper functions to convert from cellIndex to cafVecIjk

Fwk/AppFwk/CommonCode/cafVecIjk.cpp

@@ -70,4 +70,12 @@ size_t VecIjk::k() const
     return m_values[2];
 }
 
-}; // namespace caf
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+std::string VecIjk::toString() const
+{
+    return std::to_string( i() ) + ", " + std::to_string( j() ) + ", " + std::to_string( k() );
+}
+
+}; // namespace caf

Fwk/AppFwk/CommonCode/cafVecIjk.h

@@ -38,6 +38,7 @@
 
 #include <array>
 #include <cstddef>
+#include <string>
 
 namespace caf
 {
@@ -50,6 +51,8 @@ public:
     size_t j() const;
     size_t k() const;
 
+    std::string toString() const;
+
 private:
     std::array<size_t, 3> m_values;
 };