1 static char help[] = "Tests for point location\n\n"; 2 3 #include <petscsf.h> 4 #include <petscdmplex.h> 5 6 static PetscErrorCode CreateMesh(MPI_Comm comm, DM *dm) 7 { 8 PetscFunctionBeginUser; 9 PetscCall(DMCreate(comm, dm)); 10 PetscCall(DMSetType(*dm, DMPLEX)); 11 PetscCall(DMSetFromOptions(*dm)); 12 PetscCall(DMViewFromOptions(*dm, NULL, "-dm_view")); 13 PetscFunctionReturn(0); 14 } 15 16 static PetscErrorCode TestLocation(DM dm) 17 { 18 Vec points; 19 PetscSF cellSF = NULL; 20 const PetscSFNode *cells; 21 PetscScalar *a; 22 PetscInt cdim, n; 23 PetscInt cStart, cEnd, c; 24 25 PetscFunctionBeginUser; 26 PetscCall(DMGetCoordinateDim(dm, &cdim)); 27 PetscCall(DMGetCoordinatesLocalSetUp(dm)); 28 PetscCall(DMPlexGetHeightStratum(dm, 0, &cStart, &cEnd)); 29 /* Locate all centroids */ 30 PetscCall(VecCreateSeq(PETSC_COMM_SELF, (cEnd - cStart) * cdim, &points)); 31 PetscCall(VecSetBlockSize(points, cdim)); 32 PetscCall(VecGetArray(points, &a)); 33 for (c = cStart; c < cEnd; ++c) { 34 PetscReal centroid[3]; 35 PetscInt off = (c - cStart) * cdim, d; 36 37 PetscCall(DMPlexComputeCellGeometryFVM(dm, c, NULL, centroid, NULL)); 38 for (d = 0; d < cdim; ++d) a[off + d] = centroid[d]; 39 } 40 PetscCall(VecRestoreArray(points, &a)); 41 PetscCall(DMLocatePoints(dm, points, DM_POINTLOCATION_NONE, &cellSF)); 42 PetscCall(VecDestroy(&points)); 43 PetscCall(PetscSFGetGraph(cellSF, NULL, &n, NULL, &cells)); 44 if (n != (cEnd - cStart)) { 45 for (c = 0; c < n; ++c) { 46 if (cells[c].index != c + cStart) PetscCall(PetscPrintf(PETSC_COMM_SELF, "Could not locate centroid of cell %" PetscInt_FMT ", error %" PetscInt_FMT "\n", c + cStart, cells[c].index)); 47 } 48 SETERRQ(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Located %" PetscInt_FMT " points instead of %" PetscInt_FMT, n, cEnd - cStart); 49 } 50 for (c = cStart; c < cEnd; ++c) PetscCheck(cells[c - cStart].index == c, PETSC_COMM_SELF, PETSC_ERR_PLIB, "Could not locate centroid of cell %" PetscInt_FMT ", instead found %" PetscInt_FMT, c, cells[c - cStart].index); 51 PetscCall(PetscSFDestroy(&cellSF)); 52 PetscFunctionReturn(0); 53 } 54 55 int main(int argc, char **argv) 56 { 57 DM dm; 58 59 PetscFunctionBeginUser; 60 PetscCall(PetscInitialize(&argc, &argv, NULL, help)); 61 PetscCall(CreateMesh(PETSC_COMM_WORLD, &dm)); 62 PetscCall(TestLocation(dm)); 63 PetscCall(DMDestroy(&dm)); 64 PetscCall(PetscFinalize()); 65 return 0; 66 } 67 68 /*TEST 69 70 testset: 71 args: -dm_plex_dim 1 -dm_plex_box_faces 10 72 73 test: 74 suffix: seg 75 76 test: 77 suffix: seg_hash 78 args: -dm_refine 2 -dm_plex_hash_location 79 80 testset: 81 args: -dm_plex_box_faces 5,5 82 83 test: 84 suffix: tri 85 requires: triangle 86 87 test: 88 suffix: tri_hash 89 requires: triangle 90 args: -dm_refine 2 -dm_plex_hash_location 91 92 test: 93 suffix: quad 94 args: -dm_plex_simplex 0 95 96 test: 97 suffix: quad_hash 98 args: -dm_plex_simplex 0 -dm_refine 2 -dm_plex_hash_location 99 100 testset: 101 args: -dm_plex_dim 3 -dm_plex_box_faces 3,3,3 102 103 test: 104 suffix: tet 105 requires: ctetgen 106 107 test: 108 suffix: tet_hash 109 requires: ctetgen 110 args: -dm_refine 1 -dm_plex_hash_location 111 112 test: 113 suffix: hex 114 args: -dm_plex_simplex 0 115 116 test: 117 suffix: hex_hash 118 args: -dm_plex_simplex 0 -dm_refine 1 -dm_plex_hash_location 119 120 TEST*/ 121