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 PetscErrorCode ierr; 22c4762a1bSJed Brown PetscInt Nvertices = 6; /* total number of vertices */ 23c4762a1bSJed Brown PetscInt ncells = 2; /* number cells on this process */ 24c4762a1bSJed Brown PetscInt *ii,*jj; 25c4762a1bSJed Brown PetscMPIInt size,rank; 26c4762a1bSJed Brown MatPartitioning part; 27c4762a1bSJed Brown IS is; 28c4762a1bSJed Brown 29c4762a1bSJed Brown ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 30*5f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_size(MPI_COMM_WORLD,&size)); 312c71b3e2SJacob Faibussowitsch PetscCheckFalse(size != 2,PETSC_COMM_WORLD,PETSC_ERR_SUP,"This example is for exactly two processes"); 32*5f80ce2aSJacob Faibussowitsch CHKERRMPI(MPI_Comm_rank(MPI_COMM_WORLD,&rank)); 33c4762a1bSJed Brown 34*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscMalloc1(3,&ii)); 35*5f80ce2aSJacob Faibussowitsch CHKERRQ(PetscMalloc1(6,&jj)); 36c4762a1bSJed Brown ii[0] = 0; ii[1] = 3; ii[2] = 6; 37dd400576SPatrick Sanan if (rank == 0) { 38c4762a1bSJed Brown jj[0] = 0; jj[1] = 1; jj[2] = 2; jj[3] = 1; jj[4] = 2; jj[5] = 3; 39c4762a1bSJed Brown } else { 40c4762a1bSJed Brown jj[0] = 1; jj[1] = 4; jj[2] = 5; jj[3] = 1; jj[4] = 3; jj[5] = 5; 41c4762a1bSJed Brown } 42*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatCreateMPIAdj(MPI_COMM_WORLD,ncells,Nvertices,ii,jj,NULL,&mesh)); 43*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatMeshToCellGraph(mesh,2,&dual)); 44*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatView(dual,PETSC_VIEWER_STDOUT_WORLD)); 45c4762a1bSJed Brown 46*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatPartitioningCreate(MPI_COMM_WORLD,&part)); 47*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatPartitioningSetAdjacency(part,dual)); 48*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatPartitioningSetFromOptions(part)); 49*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatPartitioningApply(part,&is)); 50*5f80ce2aSJacob Faibussowitsch CHKERRQ(ISView(is,PETSC_VIEWER_STDOUT_WORLD)); 51*5f80ce2aSJacob Faibussowitsch CHKERRQ(ISDestroy(&is)); 52*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatPartitioningDestroy(&part)); 53c4762a1bSJed Brown 54*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&mesh)); 55*5f80ce2aSJacob Faibussowitsch CHKERRQ(MatDestroy(&dual)); 56c4762a1bSJed Brown ierr = PetscFinalize(); 57c4762a1bSJed Brown return ierr; 58c4762a1bSJed Brown } 59c4762a1bSJed Brown 60c4762a1bSJed Brown /*TEST 61c4762a1bSJed Brown 62c4762a1bSJed Brown build: 63c4762a1bSJed Brown requires: parmetis 64c4762a1bSJed Brown 65c4762a1bSJed Brown test: 66c4762a1bSJed Brown nsize: 2 67c4762a1bSJed Brown requires: parmetis 68c4762a1bSJed Brown 69c4762a1bSJed Brown TEST*/ 70