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; 30ffc4695bSBarry Smith ierr = MPI_Comm_size(MPI_COMM_WORLD,&size);CHKERRMPI(ierr); 31*2c71b3e2SJacob Faibussowitsch PetscCheckFalse(size != 2,PETSC_COMM_WORLD,PETSC_ERR_SUP,"This example is for exactly two processes"); 32ffc4695bSBarry Smith ierr = MPI_Comm_rank(MPI_COMM_WORLD,&rank);CHKERRMPI(ierr); 33c4762a1bSJed Brown 34c4762a1bSJed Brown ierr = PetscMalloc1(3,&ii);CHKERRQ(ierr); 35c4762a1bSJed Brown ierr = PetscMalloc1(6,&jj);CHKERRQ(ierr); 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 } 42c4762a1bSJed Brown ierr = MatCreateMPIAdj(MPI_COMM_WORLD,ncells,Nvertices,ii,jj,NULL,&mesh);CHKERRQ(ierr); 43c4762a1bSJed Brown ierr = MatMeshToCellGraph(mesh,2,&dual);CHKERRQ(ierr); 44c4762a1bSJed Brown ierr = MatView(dual,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 45c4762a1bSJed Brown 46c4762a1bSJed Brown ierr = MatPartitioningCreate(MPI_COMM_WORLD,&part);CHKERRQ(ierr); 47c4762a1bSJed Brown ierr = MatPartitioningSetAdjacency(part,dual);CHKERRQ(ierr); 48c4762a1bSJed Brown ierr = MatPartitioningSetFromOptions(part);CHKERRQ(ierr); 49c4762a1bSJed Brown ierr = MatPartitioningApply(part,&is);CHKERRQ(ierr); 50c4762a1bSJed Brown ierr = ISView(is,PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 51c4762a1bSJed Brown ierr = ISDestroy(&is);CHKERRQ(ierr); 52c4762a1bSJed Brown ierr = MatPartitioningDestroy(&part);CHKERRQ(ierr); 53c4762a1bSJed Brown 54c4762a1bSJed Brown ierr = MatDestroy(&mesh);CHKERRQ(ierr); 55c4762a1bSJed Brown ierr = MatDestroy(&dual);CHKERRQ(ierr); 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