precice · boris-martin · Apr 13, 2022 · Apr 9, 2022 · Apr 9, 2022
diff --git a/adapter/PreciceInterface.c b/adapter/PreciceInterface.c
@@ -510,7 +510,24 @@ void PreciceInterface_ConfigureFaceCentersMesh(PreciceInterface *interface, Simu
   interface->faceCentersMeshID    = precicec_getMeshID(interface->faceCentersMeshName);
   interface->preciceFaceCenterIDs = malloc(interface->numElements * sizeof(int));
 
-  precicec_setMeshVertices(interface->faceCentersMeshID, interface->numElements, interface->faceCenterCoordinates, interface->preciceFaceCenterIDs);
+  sendFaceCentersVertices(interface);
+}
+
+void sendFaceCentersVertices(PreciceInterface *interface)
+{
+  // Send the data of face centers to preCICE. If 2D coupling is used, skip the z component!
+
+  if (!isQuasi2D3D(interface->quasi2D3D)) {
+    precicec_setMeshVertices(interface->faceCentersMeshID, interface->numElements, interface->faceCenterCoordinates, interface->preciceFaceCenterIDs);
+  } else {
+    double *coordinates2D = malloc(interface->numElements * 2 * sizeof(double));
+    for (int i = 0; i < interface->numElements; ++i) {
+      coordinates2D[2 * i]     = interface->faceCenterCoordinates[3 * i];
+      coordinates2D[2 * i + 1] = interface->faceCenterCoordinates[3 * i + 1];
+    }
+    precicec_setMeshVertices(interface->faceCentersMeshID, interface->numElements, coordinates2D, interface->preciceFaceCenterIDs);
+    free(coordinates2D);
+  }
 }
 
 void PreciceInterface_ConfigureNodesMesh(PreciceInterface *interface, SimulationData *sim)

diff --git a/adapter/PreciceInterface.h b/adapter/PreciceInterface.h
@@ -247,12 +247,20 @@ void Precice_FreeData(SimulationData *sim);
 void PreciceInterface_Create(PreciceInterface *interface, SimulationData *sim, InterfaceConfig const *config);
 
 /**
- * @brief Configures the face centers mesh and calls setMeshVertices on preCICE
+ * @brief Configures the face centers mesh and calls sendFaceCentersVertices, 
+ * who is responsible for calling preCICE
  * @param interface
  * @param sim
  */
 void PreciceInterface_ConfigureFaceCentersMesh(PreciceInterface *interface, SimulationData *sim);
 
+/**
+ * @brief Send the faces centers to preCICE.
+ * 
+ * @param interface 
+ */
+void sendFaceCentersVertices(PreciceInterface *interface);
+
 /**
  * @brief Configures the nodes mesh
  * @param interface