1: const char help[] = "Simple example to get equally space points in high-order elements (and XGC mirror)";

  3: #include <petscfe.h>
  4: #include <petscdmplex.h>
  5: static PetscErrorCode x(PetscInt dim, PetscReal time, const PetscReal x[], PetscInt Nf_dummy, PetscScalar *u, void *actx)
  6: {
  7:   PetscFunctionBegin;
  8:   u[0] = x[0];
  9:   PetscFunctionReturn(PETSC_SUCCESS);
 10: }

 12: int main(int argc, char **argv)
 13: {
 14:   PetscInt       dim = 2, cells[] = {1, 1, 1};
 15:   DM             K;
 16:   PetscReal      radius = 2, lo[] = {-radius, -radius, -radius}, hi[] = {radius, radius, radius};
 17:   DMBoundaryType periodicity[3] = {DM_BOUNDARY_NONE, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE};
 18:   PetscFE        fe;
 19:   PetscErrorCode (*initu[1])(PetscInt, PetscReal, const PetscReal[], PetscInt, PetscScalar[], void *);
 20:   Vec X;

 22:   PetscFunctionBeginUser;
 23:   PetscCall(PetscInitialize(&argc, &argv, NULL, help));
 24:   PetscOptionsBegin(PETSC_COMM_WORLD, "", "Options for PETSCDUALSPACELAGRANGE test", "none");
 25:   PetscCall(PetscOptionsRangeInt("-dim", "The spatial dimension", "ex1.c", dim, &dim, NULL, 0, 3));
 26:   PetscOptionsEnd();

 28:   PetscCall(DMPlexCreateBoxMesh(PETSC_COMM_SELF, dim, PETSC_FALSE, cells, lo, hi, periodicity, PETSC_TRUE, 0, PETSC_TRUE, &K));
 29:   PetscCall(PetscFECreateDefault(PETSC_COMM_SELF, dim, 1, PETSC_FALSE, NULL, PETSC_DECIDE, &fe));
 30:   PetscCall(DMSetField(K, 0, NULL, (PetscObject)fe));
 31:   PetscCall(PetscFEDestroy(&fe));
 32:   PetscCall(DMCreateDS(K));

 34:   initu[0] = x;
 35:   PetscCall(DMCreateGlobalVector(K, &X));
 36:   PetscCall(DMProjectFunction(K, 0.0, initu, NULL, INSERT_ALL_VALUES, X));
 37:   PetscCall(DMViewFromOptions(K, NULL, "-dual_dm_view"));
 38:   PetscCall(VecViewFromOptions(X, NULL, "-dual_vec_view"));
 39:   PetscCall(DMDestroy(&K));
 40:   PetscCall(VecDestroy(&X));
 41:   PetscCall(PetscFinalize());
 42:   return 0;
 43: }

 45: /*TEST

 47:   testset:
 48:     filter: grep -v DM_
 49:     diff_args: -j
 50:     args: -petscspace_degree 4 -petscdualspace_lagrange_node_type equispaced -petscdualspace_lagrange_node_endpoints 1 -dual_dm_view -dual_vec_view
 51:     test:
 52:       requires: !single
 53:       suffix: 0
 54:     test:
 55:       requires: !single
 56:       suffix: 3d
 57:       args: -dim 3

 59: TEST*/