1*c4762a1bSJed Brown 2*c4762a1bSJed Brown static char help[] = "Tests MatMeshToDual()\n\n"; 3*c4762a1bSJed Brown 4*c4762a1bSJed Brown /*T 5*c4762a1bSJed Brown Concepts: Mat^mesh partitioning 6*c4762a1bSJed Brown Processors: n 7*c4762a1bSJed Brown T*/ 8*c4762a1bSJed Brown 9*c4762a1bSJed Brown /* 10*c4762a1bSJed Brown Include "petscmat.h" so that we can use matrices. 11*c4762a1bSJed Brown automatically includes: 12*c4762a1bSJed Brown petscsys.h - base PETSc routines petscvec.h - vectors 13*c4762a1bSJed Brown petscmat.h - matrices 14*c4762a1bSJed Brown petscis.h - index sets petscviewer.h - viewers 15*c4762a1bSJed Brown */ 16*c4762a1bSJed Brown #include <petscmat.h> 17*c4762a1bSJed Brown 18*c4762a1bSJed Brown int main(int argc,char **args) 19*c4762a1bSJed Brown { 20*c4762a1bSJed Brown Mat mesh,dual; 21*c4762a1bSJed Brown PetscErrorCode ierr; 22*c4762a1bSJed Brown PetscInt Nvertices = 6; /* total number of vertices */ 23*c4762a1bSJed Brown PetscInt ncells = 2; /* number cells on this process */ 24*c4762a1bSJed Brown PetscInt *ii,*jj; 25*c4762a1bSJed Brown PetscMPIInt size,rank; 26*c4762a1bSJed Brown MatPartitioning part; 27*c4762a1bSJed Brown IS is; 28*c4762a1bSJed Brown 29*c4762a1bSJed Brown ierr = PetscInitialize(&argc,&args,(char*)0,help);if (ierr) return ierr; 30*c4762a1bSJed Brown ierr = MPI_Comm_size(MPI_COMM_WORLD,&size);CHKERRQ(ierr); 31*c4762a1bSJed Brown if (size != 2) SETERRQ(PETSC_COMM_WORLD,PETSC_ERR_SUP,"This example is for exactly two processes"); 32*c4762a1bSJed Brown ierr = MPI_Comm_rank(MPI_COMM_WORLD,&rank);CHKERRQ(ierr); 33*c4762a1bSJed Brown 34*c4762a1bSJed Brown ierr = PetscMalloc1(3,&ii);CHKERRQ(ierr); 35*c4762a1bSJed Brown ierr = PetscMalloc1(6,&jj);CHKERRQ(ierr); 36*c4762a1bSJed Brown ii[0] = 0; ii[1] = 3; ii[2] = 6; 37*c4762a1bSJed Brown if (!rank) { 38*c4762a1bSJed Brown jj[0] = 0; jj[1] = 1; jj[2] = 2; jj[3] = 1; jj[4] = 2; jj[5] = 3; 39*c4762a1bSJed Brown } else { 40*c4762a1bSJed Brown jj[0] = 1; jj[1] = 4; jj[2] = 5; jj[3] = 1; jj[4] = 3; jj[5] = 5; 41*c4762a1bSJed Brown } 42*c4762a1bSJed Brown ierr = MatCreateMPIAdj(MPI_COMM_WORLD,ncells,Nvertices,ii,jj,NULL,&mesh);CHKERRQ(ierr); 43*c4762a1bSJed Brown ierr = MatMeshToCellGraph(mesh,2,&dual);CHKERRQ(ierr); 44*c4762a1bSJed Brown ierr = MatView(dual,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 45*c4762a1bSJed Brown 46*c4762a1bSJed Brown ierr = MatPartitioningCreate(MPI_COMM_WORLD,&part);CHKERRQ(ierr); 47*c4762a1bSJed Brown ierr = MatPartitioningSetAdjacency(part,dual);CHKERRQ(ierr); 48*c4762a1bSJed Brown ierr = MatPartitioningSetFromOptions(part);CHKERRQ(ierr); 49*c4762a1bSJed Brown ierr = MatPartitioningApply(part,&is);CHKERRQ(ierr); 50*c4762a1bSJed Brown ierr = ISView(is,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 51*c4762a1bSJed Brown ierr = ISDestroy(&is);CHKERRQ(ierr); 52*c4762a1bSJed Brown ierr = MatPartitioningDestroy(&part);CHKERRQ(ierr); 53*c4762a1bSJed Brown 54*c4762a1bSJed Brown ierr = MatDestroy(&mesh);CHKERRQ(ierr); 55*c4762a1bSJed Brown ierr = MatDestroy(&dual);CHKERRQ(ierr); 56*c4762a1bSJed Brown ierr = PetscFinalize(); 57*c4762a1bSJed Brown return ierr; 58*c4762a1bSJed Brown } 59*c4762a1bSJed Brown 60*c4762a1bSJed Brown 61*c4762a1bSJed Brown 62*c4762a1bSJed Brown 63*c4762a1bSJed Brown 64*c4762a1bSJed Brown /*TEST 65*c4762a1bSJed Brown 66*c4762a1bSJed Brown build: 67*c4762a1bSJed Brown requires: parmetis 68*c4762a1bSJed Brown 69*c4762a1bSJed Brown test: 70*c4762a1bSJed Brown nsize: 2 71*c4762a1bSJed Brown requires: parmetis 72*c4762a1bSJed Brown 73*c4762a1bSJed Brown TEST*/ 74