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 13c4762a1bSJed Brown int main(int argc,char **args) 14c4762a1bSJed Brown { 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 23*327415f7SBarry 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)); 31c4762a1bSJed Brown ii[0] = 0; ii[1] = 3; ii[2] = 6; 32dd400576SPatrick Sanan if (rank == 0) { 33c4762a1bSJed Brown jj[0] = 0; jj[1] = 1; jj[2] = 2; jj[3] = 1; jj[4] = 2; jj[5] = 3; 34c4762a1bSJed Brown } else { 35c4762a1bSJed Brown jj[0] = 1; jj[1] = 4; jj[2] = 5; jj[3] = 1; jj[4] = 3; jj[5] = 5; 36c4762a1bSJed Brown } 379566063dSJacob Faibussowitsch PetscCall(MatCreateMPIAdj(MPI_COMM_WORLD,ncells,Nvertices,ii,jj,NULL,&mesh)); 389566063dSJacob Faibussowitsch PetscCall(MatMeshToCellGraph(mesh,2,&dual)); 399566063dSJacob Faibussowitsch PetscCall(MatView(dual,PETSC_VIEWER_STDOUT_WORLD)); 40c4762a1bSJed Brown 419566063dSJacob Faibussowitsch PetscCall(MatPartitioningCreate(MPI_COMM_WORLD,&part)); 429566063dSJacob Faibussowitsch PetscCall(MatPartitioningSetAdjacency(part,dual)); 439566063dSJacob Faibussowitsch PetscCall(MatPartitioningSetFromOptions(part)); 449566063dSJacob Faibussowitsch PetscCall(MatPartitioningApply(part,&is)); 459566063dSJacob Faibussowitsch PetscCall(ISView(is,PETSC_VIEWER_STDOUT_WORLD)); 469566063dSJacob Faibussowitsch PetscCall(ISDestroy(&is)); 479566063dSJacob Faibussowitsch PetscCall(MatPartitioningDestroy(&part)); 48c4762a1bSJed Brown 499566063dSJacob Faibussowitsch PetscCall(MatDestroy(&mesh)); 509566063dSJacob Faibussowitsch PetscCall(MatDestroy(&dual)); 519566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 52b122ec5aSJacob Faibussowitsch return 0; 53c4762a1bSJed Brown } 54c4762a1bSJed Brown 55c4762a1bSJed Brown /*TEST 56c4762a1bSJed Brown 57c4762a1bSJed Brown build: 58c4762a1bSJed Brown requires: parmetis 59c4762a1bSJed Brown 60c4762a1bSJed Brown test: 61c4762a1bSJed Brown nsize: 2 62c4762a1bSJed Brown requires: parmetis 63c4762a1bSJed Brown 64c4762a1bSJed Brown TEST*/ 65