Merge 3D mpi versions

BasicSolver/3D-mpi/src/main.c

@@ -1,11 +1,9 @@
 /*
- * Copyright (C) 2024 NHR@FAU, University Erlangen-Nuremberg.
+ * Copyright (C)  NHR@FAU, University Erlangen-Nuremberg.
  * All rights reserved.
  * Use of this source code is governed by a MIT-style
  * license that can be found in the LICENSE file.
  */
-#include <float.h>
-#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
@@ -73,6 +71,13 @@ int main(int argc, char** argv)
         printf("Solution took %.2fs\n", timeStop - timeStart);
     }
 
+#ifdef _VTK_WRITER_MPI
+    VtkOptions opts = { .grid = s.grid, .comm = s.comm };
+    vtkOpen(&opts, s.problem);
+    vtkScalar(&opts, "pressure", s.p);
+    vtkVector(&opts, "velocity", (VtkVector) { s.u, s.v, s.w });
+    vtkClose(&opts);
+#else
     double *pg, *ug, *vg, *wg;
 
     if (commIsMaster(&s.comm)) {
@@ -104,6 +109,7 @@ int main(int argc, char** argv)
         vtkVector(&opts, "velocity", (VtkVector) { ug, vg, wg });
         vtkClose(&opts);
     }
+#endif
 
     commFinalize(&s.comm);
     return EXIT_SUCCESS;