1: static char help[] = "Make a 2D grid of patches and view them\n\n";

  3: /*
  4: Serial Test
  5: Parallel Test where all zooms are serials
  6: Parallel Test where zooms are parallel

  8: Return DMPatch from Zoom
  9: Override refine from DMPatch to split cells
 10:  */
 11: #include <petscdmpatch.h>

 13: typedef struct {
 14:   PetscInt   debug;     /* The debugging level */
 15:   PetscInt   dim;       /* The spatial dimension */
 16:   MatStencil patchSize; /* Size of patches */
 17:   MatStencil gridSize;  /* Size of patch grid */
 18:   MatStencil commSize;  /* Size of patch comm */
 19: } AppCtx;

 23: PetscErrorCode ProcessOptions(MPI_Comm comm, AppCtx *options)
 24: {
 25:   PetscInt       patchSize, commSize, gridSize;

 29:   options->debug = 0;
 30:   options->dim   = 2;
 31:   patchSize      = 0;
 32:   commSize       = 0;
 33:   gridSize       = 0;

 35:   PetscOptionsBegin(comm, "", "Patch Test Options", "DMPATCH");
 36:   PetscOptionsInt("-debug", "The debugging level", "ex1.c", options->debug, &options->debug, NULL);
 37:   PetscOptionsInt("-dim", "The spatial dimension", "ex1.c", options->dim, &options->dim, NULL);
 38:   PetscOptionsInt("-patch_size", "The patch size in each dimension", "ex1.c", patchSize, &patchSize, NULL);
 39:   PetscOptionsInt("-comm_size", "The comm size in each dimension", "ex1.c", commSize, &commSize, NULL);
 40:   PetscOptionsInt("-grid_size", "The grid size in each dimension", "ex1.c", gridSize, &gridSize, NULL);
 41:   PetscOptionsEnd();

 43:   options->patchSize.i = options->patchSize.j = options->patchSize.k = 1;
 44:   options->commSize.i  = options->commSize.j  = options->commSize.k = 1;
 45:   options->gridSize.i  = options->gridSize.j  = options->gridSize.k = 1;
 46:   if (options->dim > 0) {options->patchSize.i = patchSize; options->commSize.i = commSize; options->gridSize.i = gridSize;}
 47:   if (options->dim > 1) {options->patchSize.j = patchSize; options->commSize.j = commSize; options->gridSize.j = gridSize;}
 48:   if (options->dim > 2) {options->patchSize.k = patchSize; options->commSize.k = commSize; options->gridSize.k = gridSize;}
 49:   return(0);
 50: };

 54: int main(int argc, char **argv)
 55: {
 56:   DM             dm;
 57:   AppCtx         user;                 /* user-defined work context */

 60:   PetscInitialize(&argc, &argv, NULL, help);
 61:   ProcessOptions(PETSC_COMM_WORLD, &user);
 62:   DMPatchCreateGrid(PETSC_COMM_WORLD, user.dim, user.patchSize, user.commSize, user.gridSize, &dm);
 63:   PetscObjectSetName((PetscObject) dm, "Patch Mesh");
 64:   DMSetFromOptions(dm);
 65:   DMSetUp(dm);
 66:   DMView(dm, PETSC_VIEWER_STDOUT_WORLD);
 67:   DMPatchSolve(dm);
 68:   DMDestroy(&dm);
 69:   PetscFinalize();
 70:   return 0;
 71: }