Add helper functions to convert from cellIndex to cafVecIjk

ApplicationLibCode/ReservoirDataModel/RigGridBase.cpp

@@ -218,6 +218,34 @@ bool RigGridBase::ijkFromCellIndex( size_t cellIndex, size_t* i, size_t* j, size
     return true;
 }
 
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+std::optional<caf::VecIjk> RigGridBase::ijkFromCellIndex( size_t cellIndex ) const
+{
+    size_t i, j, k;
+    if ( ijkFromCellIndex( cellIndex, &i, &j, &k ) )
+    {
+        return caf::VecIjk( i, j, k );
+    }
+
+    return std::nullopt;
+}
+
+//--------------------------------------------------------------------------------------------------
+///
+//--------------------------------------------------------------------------------------------------
+std::optional<caf::VecIjk> RigGridBase::ijkFromCellIndexOneBased( size_t cellIndex ) const
+{
+    size_t i, j, k;
+    if ( ijkFromCellIndex( cellIndex, &i, &j, &k ) )
+    {
+        return caf::VecIjk( ++i, ++j, ++k );
+    }
+
+    return std::nullopt;
+}
+
 //--------------------------------------------------------------------------------------------------
 /// This version does no if-guarding. Check that all dimensions of the grid are non-zero before using.
 /// Useful for running in a loop after doing the sanity check once.

ApplicationLibCode/ReservoirDataModel/RigGridBase.h

@@ -23,11 +23,13 @@
 #include "RifReaderInterface.h"
 #include "RigFault.h"
 
+#include "cafVecIjk.h"
 #include "cvfBoundingBox.h"
 #include "cvfStructGrid.h"
 #include "cvfStructGridGeometryGenerator.h"
 #include "cvfVector3.h"
 
+#include <optional>
 #include <string>
 #include <vector>
 
@@ -95,6 +97,9 @@ public:
     bool   ijkFromCellIndex( size_t cellIndex, size_t* i, size_t* j, size_t* k ) const override;
     void   ijkFromCellIndexUnguarded( size_t cellIndex, size_t* i, size_t* j, size_t* k ) const;
 
+    std::optional<caf::VecIjk> ijkFromCellIndex( size_t cellIndex ) const;
+    std::optional<caf::VecIjk> ijkFromCellIndexOneBased( size_t cellIndex ) const;
+
     bool       cellIJKFromCoordinate( const cvf::Vec3d& coord, size_t* i, size_t* j, size_t* k ) const override;
     void       cellCornerVertices( size_t cellIndex, cvf::Vec3d vertices[8] ) const override;
     cvf::Vec3d cellCentroid( size_t cellIndex ) const override;

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;
 };