1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests MatMeshToDual()\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown /* 5c4762a1bSJed Brown Include "petscmat.h" so that we can use matrices. 6c4762a1bSJed Brown automatically includes: 7c4762a1bSJed Brown petscsys.h - base PETSc routines petscvec.h - vectors 8c4762a1bSJed Brown petscmat.h - matrices 9c4762a1bSJed Brown petscis.h - index sets petscviewer.h - viewers 10c4762a1bSJed Brown */ 11c4762a1bSJed Brown #include <petscmat.h> 12c4762a1bSJed Brown 13*d71ae5a4SJacob Faibussowitsch int main(int argc, char **args) 14*d71ae5a4SJacob Faibussowitsch { 15c4762a1bSJed Brown Mat mesh, dual; 16c4762a1bSJed Brown PetscInt Nvertices = 6; /* total number of vertices */ 17c4762a1bSJed Brown PetscInt ncells = 2; /* number cells on this process */ 18c4762a1bSJed Brown PetscInt *ii, *jj; 19c4762a1bSJed Brown PetscMPIInt size, rank; 20c4762a1bSJed Brown MatPartitioning part; 21c4762a1bSJed Brown IS is; 22c4762a1bSJed Brown 23327415f7SBarry Smith PetscFunctionBeginUser; 249566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc, &args, (char *)0, help)); 259566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(MPI_COMM_WORLD, &size)); 26be096a46SBarry Smith PetscCheck(size == 2, PETSC_COMM_WORLD, PETSC_ERR_WRONG_MPI_SIZE, "This example is for exactly two processes"); 279566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(MPI_COMM_WORLD, &rank)); 28c4762a1bSJed Brown 299566063dSJacob Faibussowitsch PetscCall(PetscMalloc1(3, &ii)); 309566063dSJacob Faibussowitsch PetscCall(PetscMalloc1(6, &jj)); 319371c9d4SSatish Balay ii[0] = 0; 329371c9d4SSatish Balay ii[1] = 3; 339371c9d4SSatish Balay ii[2] = 6; 34dd400576SPatrick Sanan if (rank == 0) { 359371c9d4SSatish Balay jj[0] = 0; 369371c9d4SSatish Balay jj[1] = 1; 379371c9d4SSatish Balay jj[2] = 2; 389371c9d4SSatish Balay jj[3] = 1; 399371c9d4SSatish Balay jj[4] = 2; 409371c9d4SSatish Balay jj[5] = 3; 41c4762a1bSJed Brown } else { 429371c9d4SSatish Balay jj[0] = 1; 439371c9d4SSatish Balay jj[1] = 4; 449371c9d4SSatish Balay jj[2] = 5; 459371c9d4SSatish Balay jj[3] = 1; 469371c9d4SSatish Balay jj[4] = 3; 479371c9d4SSatish Balay jj[5] = 5; 48c4762a1bSJed Brown } 499566063dSJacob Faibussowitsch PetscCall(MatCreateMPIAdj(MPI_COMM_WORLD, ncells, Nvertices, ii, jj, NULL, &mesh)); 509566063dSJacob Faibussowitsch PetscCall(MatMeshToCellGraph(mesh, 2, &dual)); 519566063dSJacob Faibussowitsch PetscCall(MatView(dual, PETSC_VIEWER_STDOUT_WORLD)); 52c4762a1bSJed Brown 539566063dSJacob Faibussowitsch PetscCall(MatPartitioningCreate(MPI_COMM_WORLD, &part)); 549566063dSJacob Faibussowitsch PetscCall(MatPartitioningSetAdjacency(part, dual)); 559566063dSJacob Faibussowitsch PetscCall(MatPartitioningSetFromOptions(part)); 569566063dSJacob Faibussowitsch PetscCall(MatPartitioningApply(part, &is)); 579566063dSJacob Faibussowitsch PetscCall(ISView(is, PETSC_VIEWER_STDOUT_WORLD)); 589566063dSJacob Faibussowitsch PetscCall(ISDestroy(&is)); 599566063dSJacob Faibussowitsch PetscCall(MatPartitioningDestroy(&part)); 60c4762a1bSJed Brown 619566063dSJacob Faibussowitsch PetscCall(MatDestroy(&mesh)); 629566063dSJacob Faibussowitsch PetscCall(MatDestroy(&dual)); 639566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 64b122ec5aSJacob Faibussowitsch return 0; 65c4762a1bSJed Brown } 66c4762a1bSJed Brown 67c4762a1bSJed Brown /*TEST 68c4762a1bSJed Brown 69c4762a1bSJed Brown build: 70c4762a1bSJed Brown requires: parmetis 71c4762a1bSJed Brown 72c4762a1bSJed Brown test: 73c4762a1bSJed Brown nsize: 2 74c4762a1bSJed Brown requires: parmetis 75c4762a1bSJed Brown 76c4762a1bSJed Brown TEST*/ 77