Write deformed configuration in nonplanarcosseratshellenergytest.cc

Previously, the code would write the reference deformation and the
final orientation.  This patch replaces the reference deformation
by the final deformation.

This is still wrong, because the CosseratVTKWriter expect the
displacement, not the deformation.  That problem is left for later.

test/nonplanarcosseratenergytest.cc

@@ -97,15 +97,17 @@ double calculateEnergy(const FlatGridView& flatGridView,
   //  Write the configuration to a file (just for debugging)
   /////////////////////////////////////////////////////////////////////////
 
-  // The orientation function needs to become a GridViewFunction,
-  // otherwise the current CosseratVTKWriter will not accept it.
+  // The deformation and orientation functions need to become a GridViewFunctions,
+  // otherwise the current CosseratVTKWriter will not accept them.
+  auto deformationGridViewFunction = Functions::makeAnalyticGridViewFunction(deformationFunction, flatGridView);
+
   // TODO: This is essentially the same as orientationQuaternionFunction
   auto orientationQuaternionGridViewFunction = Functions::makeAnalyticGridViewFunction(orientationQuaternionFunction, flatGridView);
 
-
   // TODO: Write the curved grid, not the flat one
+  // BUG: The second argument should be the displacement, not the deformation
   CosseratVTKWriter<FlatGridView>::write(flatGridView,
-                                         curvedGridGeometry,
+                                         deformationGridViewFunction,
                                          orientationQuaternionGridViewFunction,
                                          2, // VTK output element order
                                          "nonplanarcosseratenergytest-result.vtu");