diff --git a/Base/Rendering/RenderDelegate/imstkMappedVertexArray.cpp b/Base/Rendering/RenderDelegate/imstkMappedVertexArray.cpp
index cde8ae4b1f6dd1d20635ddc5921e24ea86d93397..7e4af2bcace845ab56be40941640412e8e64f882 100644
--- a/Base/Rendering/RenderDelegate/imstkMappedVertexArray.cpp
+++ b/Base/Rendering/RenderDelegate/imstkMappedVertexArray.cpp
@@ -206,9 +206,21 @@ MappedVertexArray::LookupTypedValue(double value, vtkIdList *ids)
 
 //------------------------------------------------------------------------------
 double
-MappedVertexArray::GetValue(vtkIdType idx)
+MappedVertexArray::GetValue(vtkIdType idx) const
 {
-    return this->GetValueReference(idx);
+    const vtkIdType tuple = idx / this->NumberOfComponents;
+    const vtkIdType comp = idx % this->NumberOfComponents;
+    switch(comp)
+    {
+        case 0:
+            return (*this->vertexArray)[tuple](0);
+        case 1:
+            return (*this->vertexArray)[tuple](1);
+        case 2:
+            return (*this->vertexArray)[tuple](2);
+        default:
+            return 0;
+    }
 }
 
 //------------------------------------------------------------------------------
@@ -232,6 +244,15 @@ MappedVertexArray::GetValueReference(vtkIdType idx)
     }
 }
 
+//------------------------------------------------------------------------------
+void
+MappedVertexArray::GetTypedTuple(vtkIdType tupleId, ValueType *tuple) const
+{
+  tuple[0] = (*this->vertexArray)[tupleId](0);
+  tuple[1] = (*this->vertexArray)[tupleId](1);
+  tuple[2] = (*this->vertexArray)[tupleId](2);
+}
+
 //------------------------------------------------------------------------------
 void
 MappedVertexArray::GetTupleValue(vtkIdType tupleId, double *tuple)
diff --git a/Base/Rendering/RenderDelegate/imstkMappedVertexArray.h b/Base/Rendering/RenderDelegate/imstkMappedVertexArray.h
index 144784d3a6cba83ea4ed3ea6046e4d2ee0570655..6446847c6de5db87f379967363dee98ef967a061 100644
--- a/Base/Rendering/RenderDelegate/imstkMappedVertexArray.h
+++ b/Base/Rendering/RenderDelegate/imstkMappedVertexArray.h
@@ -58,8 +58,9 @@ public:
     void GetTuple(vtkIdType i, double *tuple);
     vtkIdType LookupTypedValue(double value);
     void LookupTypedValue(double value, vtkIdList *ids);
-    double GetValue(vtkIdType idx);
+    double GetValue(vtkIdType idx) const;
     double& GetValueReference(vtkIdType idx);
+    void GetTypedTuple(vtkIdType idx, ValueType *t) const;
     void GetTupleValue(vtkIdType idx, double *t);
 
     // Description:
@@ -98,6 +99,9 @@ public:
     vtkIdType InsertNextValue(double v);
     void InsertValue(vtkIdType idx, double v);
     void InsertVariantValue(vtkIdType idx, vtkVariant value);
+    void SetTypedTuple(vtkIdType i, const ValueType *t) {}
+    void InsertTypedTuple(vtkIdType i, const ValueType *t) {}
+    virtual vtkIdType InsertNextTypedTuple(const ValueType *t) {}
 
 protected:
     MappedVertexArray() {}