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 CHKERRQ(DMCreate(comm, dm)); 10 CHKERRQ(DMSetType(*dm, DMPLEX)); 11 CHKERRQ(DMSetFromOptions(*dm)); 12 CHKERRQ(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 CHKERRQ(DMGetCoordinateDim(dm, &cdim)); 27 CHKERRQ(DMPlexGetHeightStratum(dm, 0, &cStart, &cEnd)); 28 /* Locate all centroids */ 29 CHKERRQ(VecCreateSeq(PETSC_COMM_SELF, (cEnd - cStart)*cdim, &points)); 30 CHKERRQ(VecSetBlockSize(points, cdim)); 31 CHKERRQ(VecGetArray(points, &a)); 32 for (c = cStart; c < cEnd; ++c) { 33 PetscReal centroid[3]; 34 PetscInt off = (c - cStart)*cdim, d; 35 36 CHKERRQ(DMPlexComputeCellGeometryFVM(dm, c, NULL, centroid, NULL)); 37 for (d = 0; d < cdim; ++d) a[off+d] = centroid[d]; 38 } 39 CHKERRQ(VecRestoreArray(points, &a)); 40 CHKERRQ(DMLocatePoints(dm, points, DM_POINTLOCATION_NONE, &cellSF)); 41 CHKERRQ(VecDestroy(&points)); 42 CHKERRQ(PetscSFGetGraph(cellSF, NULL, &n, NULL, &cells)); 43 if (n != (cEnd - cStart)) { 44 for (c = 0; c < n; ++c) { 45 if (cells[c].index != c+cStart) CHKERRQ(PetscPrintf(PETSC_COMM_SELF, "Could not locate centroid of cell %D, error %D\n", c+cStart, cells[c].index)); 46 } 47 SETERRQ(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Located %D points instead of %D", n, cEnd - cStart); 48 } 49 for (c = cStart; c < cEnd; ++c) { 50 PetscCheckFalse(cells[c - cStart].index != c,PETSC_COMM_SELF, PETSC_ERR_PLIB, "Could not locate centroid of cell %D, instead found %D", c, cells[c - cStart].index); 51 } 52 CHKERRQ(PetscSFDestroy(&cellSF)); 53 PetscFunctionReturn(0); 54 } 55 56 int main(int argc, char **argv) 57 { 58 DM dm; 59 60 CHKERRQ(PetscInitialize(&argc, &argv, NULL, help)); 61 CHKERRQ(CreateMesh(PETSC_COMM_WORLD, &dm)); 62 CHKERRQ(TestLocation(dm)); 63 CHKERRQ(DMDestroy(&dm)); 64 CHKERRQ(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