1 const char help[] = "Test boundary condition insertion"; 2 3 #include <petscdmplex.h> 4 5 static PetscErrorCode set_one(PetscInt dim, PetscReal time, const PetscReal x[], PetscInt Nc, PetscScalar bcval[], void *ctx) { 6 PetscFunctionBegin; 7 bcval[0] = 1.; 8 PetscFunctionReturn(0); 9 } 10 11 static PetscErrorCode set_two(PetscInt dim, PetscReal time, const PetscReal x[], PetscInt Nc, PetscScalar bcval[], void *ctx) { 12 PetscFunctionBegin; 13 bcval[0] = 2.; 14 PetscFunctionReturn(0); 15 } 16 17 int main(int argc, char **argv) { 18 DM dm; 19 DMLabel label; 20 PetscInt in_value = 1; 21 PetscInt out_value = 3; 22 PetscInt comps[] = {0}; 23 PetscFE fe; 24 Vec localVec; 25 26 PetscFunctionBeginUser; 27 PetscCall(PetscInitialize(&argc, &argv, NULL, help)); 28 PetscCall(DMPlexCreateBoxMesh(PETSC_COMM_WORLD, 2, PETSC_FALSE, NULL, NULL, NULL, NULL, PETSC_TRUE, &dm)); 29 PetscCall(DMGetLabel(dm, "Face Sets", &label)); 30 PetscCall(PetscFECreateLagrange(PETSC_COMM_WORLD, 2, 1, PETSC_FALSE, 1, PETSC_DETERMINE, &fe)); 31 PetscCall(DMAddField(dm, NULL, (PetscObject)fe)); 32 PetscCall(PetscFEDestroy(&fe)); 33 PetscCall(DMCreateDS(dm)); 34 PetscCall(DMAddBoundary(dm, DM_BC_ESSENTIAL, "inflow condition", label, 1, &in_value, 0, 1, comps, (void (*)(void))set_one, NULL, NULL, NULL)); 35 PetscCall(DMAddBoundary(dm, DM_BC_ESSENTIAL, "outflow condition", label, 1, &out_value, 0, 1, comps, (void (*)(void))set_two, NULL, NULL, NULL)); 36 PetscCall(DMCreateLocalVector(dm, &localVec)); 37 PetscCall(VecSet(localVec, 0.)); 38 PetscCall(DMPlexInsertBoundaryValues(dm, PETSC_TRUE, localVec, 0.0, NULL, NULL, NULL)); 39 PetscCall(VecView(localVec, NULL)); 40 PetscCall(VecDestroy(&localVec)); 41 PetscCall(DMDestroy(&dm)); 42 PetscCall(PetscFinalize()); 43 return 0; 44 } 45 46 /*TEST 47 48 test: 49 suffix: 0 50 51 TEST*/ 52