1 2 static char help[] = "Tests MatSetValuesBlockedStencil() in 3d.\n\n"; 3 4 #include <petscmat.h> 5 #include <petscdm.h> 6 #include <petscdmda.h> 7 8 int main(int argc,char **argv) 9 { 10 PetscInt M = 3,N = 4,P = 2,s = 1,w = 2,i, m = PETSC_DECIDE,n = PETSC_DECIDE,p = PETSC_DECIDE; 11 PetscErrorCode ierr; 12 DM da; 13 Mat mat; 14 DMDAStencilType stencil_type = DMDA_STENCIL_BOX; 15 PetscBool flg = PETSC_FALSE; 16 MatStencil idx[2],idy[2]; 17 PetscScalar *values; 18 19 ierr = PetscInitialize(&argc,&argv,(char*)0,help);if (ierr) return ierr; 20 ierr = PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL);CHKERRQ(ierr); 21 ierr = PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL);CHKERRQ(ierr); 22 ierr = PetscOptionsGetInt(NULL,NULL,"-P",&P,NULL);CHKERRQ(ierr); 23 ierr = PetscOptionsGetInt(NULL,NULL,"-m",&m,NULL);CHKERRQ(ierr); 24 ierr = PetscOptionsGetInt(NULL,NULL,"-n",&n,NULL);CHKERRQ(ierr); 25 ierr = PetscOptionsGetInt(NULL,NULL,"-p",&p,NULL);CHKERRQ(ierr); 26 ierr = PetscOptionsGetInt(NULL,NULL,"-s",&s,NULL);CHKERRQ(ierr); 27 ierr = PetscOptionsGetInt(NULL,NULL,"-w",&w,NULL);CHKERRQ(ierr); 28 ierr = PetscOptionsGetBool(NULL,NULL,"-star",&flg,NULL);CHKERRQ(ierr); 29 if (flg) stencil_type = DMDA_STENCIL_STAR; 30 31 /* Create distributed array and get vectors */ 32 ierr = DMDACreate3d(PETSC_COMM_WORLD,DM_BOUNDARY_NONE,DM_BOUNDARY_NONE,DM_BOUNDARY_NONE,stencil_type,M,N,P,m,n,p,w,s,0,0,0,&da);CHKERRQ(ierr); 33 ierr = DMSetFromOptions(da);CHKERRQ(ierr); 34 ierr = DMSetUp(da);CHKERRQ(ierr); 35 ierr = DMSetMatType(da,MATMPIBAIJ);CHKERRQ(ierr); 36 ierr = DMCreateMatrix(da,&mat);CHKERRQ(ierr); 37 38 idx[0].i = 1; idx[0].j = 1; idx[0].k = 0; 39 idx[1].i = 2; idx[1].j = 1; idx[1].k = 0; 40 idy[0].i = 1; idy[0].j = 2; idy[0].k = 0; 41 idy[1].i = 2; idy[1].j = 2; idy[1].k = 0; 42 ierr = PetscMalloc1(2*2*w*w,&values);CHKERRQ(ierr); 43 for (i=0; i<2*2*w*w; i++) values[i] = i; 44 ierr = MatSetValuesBlockedStencil(mat,2,idx,2,idy,values,INSERT_VALUES);CHKERRQ(ierr); 45 ierr = MatAssemblyBegin(mat,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 46 ierr = MatAssemblyEnd(mat,MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); 47 48 /* Free memory */ 49 ierr = PetscFree(values);CHKERRQ(ierr); 50 ierr = MatDestroy(&mat);CHKERRQ(ierr); 51 ierr = DMDestroy(&da);CHKERRQ(ierr); 52 ierr = PetscFinalize(); 53 return ierr; 54 } 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76