1c4762a1bSJed Brown 2c4762a1bSJed Brown static char help[] = "Tests MatMeshToDual()\n\n"; 3c4762a1bSJed Brown 4c4762a1bSJed Brown /*T 5c4762a1bSJed Brown Concepts: Mat^mesh partitioning 6c4762a1bSJed Brown Processors: n 7c4762a1bSJed Brown T*/ 8c4762a1bSJed Brown 9c4762a1bSJed Brown /* 10c4762a1bSJed Brown Include "petscmat.h" so that we can use matrices. 11c4762a1bSJed Brown automatically includes: 12c4762a1bSJed Brown petscsys.h - base PETSc routines petscvec.h - vectors 13c4762a1bSJed Brown petscmat.h - matrices 14c4762a1bSJed Brown petscis.h - index sets petscviewer.h - viewers 15c4762a1bSJed Brown */ 16c4762a1bSJed Brown #include <petscmat.h> 17c4762a1bSJed Brown 18c4762a1bSJed Brown int main(int argc,char **args) 19c4762a1bSJed Brown { 20c4762a1bSJed Brown Mat mesh,dual; 21c4762a1bSJed Brown PetscInt Nvertices = 6; /* total number of vertices */ 22c4762a1bSJed Brown PetscInt ncells = 2; /* number cells on this process */ 23c4762a1bSJed Brown PetscInt *ii,*jj; 24c4762a1bSJed Brown PetscMPIInt size,rank; 25c4762a1bSJed Brown MatPartitioning part; 26c4762a1bSJed Brown IS is; 27c4762a1bSJed Brown 28*9566063dSJacob Faibussowitsch PetscCall(PetscInitialize(&argc,&args,(char*)0,help)); 29*9566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_size(MPI_COMM_WORLD,&size)); 302c71b3e2SJacob Faibussowitsch PetscCheckFalse(size != 2,PETSC_COMM_WORLD,PETSC_ERR_SUP,"This example is for exactly two processes"); 31*9566063dSJacob Faibussowitsch PetscCallMPI(MPI_Comm_rank(MPI_COMM_WORLD,&rank)); 32c4762a1bSJed Brown 33*9566063dSJacob Faibussowitsch PetscCall(PetscMalloc1(3,&ii)); 34*9566063dSJacob Faibussowitsch PetscCall(PetscMalloc1(6,&jj)); 35c4762a1bSJed Brown ii[0] = 0; ii[1] = 3; ii[2] = 6; 36dd400576SPatrick Sanan if (rank == 0) { 37c4762a1bSJed Brown jj[0] = 0; jj[1] = 1; jj[2] = 2; jj[3] = 1; jj[4] = 2; jj[5] = 3; 38c4762a1bSJed Brown } else { 39c4762a1bSJed Brown jj[0] = 1; jj[1] = 4; jj[2] = 5; jj[3] = 1; jj[4] = 3; jj[5] = 5; 40c4762a1bSJed Brown } 41*9566063dSJacob Faibussowitsch PetscCall(MatCreateMPIAdj(MPI_COMM_WORLD,ncells,Nvertices,ii,jj,NULL,&mesh)); 42*9566063dSJacob Faibussowitsch PetscCall(MatMeshToCellGraph(mesh,2,&dual)); 43*9566063dSJacob Faibussowitsch PetscCall(MatView(dual,PETSC_VIEWER_STDOUT_WORLD)); 44c4762a1bSJed Brown 45*9566063dSJacob Faibussowitsch PetscCall(MatPartitioningCreate(MPI_COMM_WORLD,&part)); 46*9566063dSJacob Faibussowitsch PetscCall(MatPartitioningSetAdjacency(part,dual)); 47*9566063dSJacob Faibussowitsch PetscCall(MatPartitioningSetFromOptions(part)); 48*9566063dSJacob Faibussowitsch PetscCall(MatPartitioningApply(part,&is)); 49*9566063dSJacob Faibussowitsch PetscCall(ISView(is,PETSC_VIEWER_STDOUT_WORLD)); 50*9566063dSJacob Faibussowitsch PetscCall(ISDestroy(&is)); 51*9566063dSJacob Faibussowitsch PetscCall(MatPartitioningDestroy(&part)); 52c4762a1bSJed Brown 53*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&mesh)); 54*9566063dSJacob Faibussowitsch PetscCall(MatDestroy(&dual)); 55*9566063dSJacob Faibussowitsch PetscCall(PetscFinalize()); 56b122ec5aSJacob Faibussowitsch return 0; 57c4762a1bSJed Brown } 58c4762a1bSJed Brown 59c4762a1bSJed Brown /*TEST 60c4762a1bSJed Brown 61c4762a1bSJed Brown build: 62c4762a1bSJed Brown requires: parmetis 63c4762a1bSJed Brown 64c4762a1bSJed Brown test: 65c4762a1bSJed Brown nsize: 2 66c4762a1bSJed Brown requires: parmetis 67c4762a1bSJed Brown 68c4762a1bSJed Brown TEST*/ 69