1 2 static char help[] = "Tests various 2-dimensional DMDA routines.\n\n"; 3 4 #include <petscdmda.h> 5 #include <petscdraw.h> 6 7 int main(int argc,char **argv) 8 { 9 PetscInt M = 10,N = 8,dof=1,s=1,bx=0,by=0,i,n,j,k,m,wrap,xs,ys; 10 DM da,dac; 11 PetscViewer viewer; 12 Vec local,global,coors; 13 PetscScalar ***xy,***aglobal; 14 PetscDraw draw; 15 char fname[32]; 16 17 CHKERRQ(PetscInitialize(&argc,&argv,(char*)0,help)); 18 /* Create viewers */ 19 CHKERRQ(PetscViewerDrawOpen(PETSC_COMM_WORLD,0,"",PETSC_DECIDE,PETSC_DECIDE,600,200,&viewer)); 20 CHKERRQ(PetscViewerDrawGetDraw(viewer,0,&draw)); 21 CHKERRQ(PetscDrawSetDoubleBuffer(draw)); 22 23 /* Read options */ 24 CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL)); 25 CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL)); 26 CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-dof",&dof,NULL)); 27 CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-s",&s,NULL)); 28 CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-periodic_x",&wrap,NULL)); 29 CHKERRQ(PetscOptionsGetInt(NULL,NULL,"-periodic_y",&wrap,NULL)); 30 31 /* Create distributed array and get vectors */ 32 CHKERRQ(DMDACreate2d(PETSC_COMM_WORLD,(DMBoundaryType)bx,(DMBoundaryType)by,DMDA_STENCIL_BOX,M,N,PETSC_DECIDE,PETSC_DECIDE,dof,s,NULL,NULL,&da)); 33 CHKERRQ(DMSetFromOptions(da)); 34 CHKERRQ(DMSetUp(da)); 35 CHKERRQ(DMDASetUniformCoordinates(da,0.0,1.0,0.0,1.0,0.0,0.0)); 36 for (i=0; i<dof; i++) { 37 sprintf(fname,"Field %d",(int)i); 38 CHKERRQ(DMDASetFieldName(da,i,fname)); 39 } 40 41 CHKERRQ(DMView(da,viewer)); 42 CHKERRQ(DMCreateGlobalVector(da,&global)); 43 CHKERRQ(DMCreateLocalVector(da,&local)); 44 CHKERRQ(DMGetCoordinates(da,&coors)); 45 CHKERRQ(DMGetCoordinateDM(da,&dac)); 46 47 /* Set values into global vectors */ 48 CHKERRQ(DMDAVecGetArrayDOFRead(dac,coors,&xy)); 49 CHKERRQ(DMDAVecGetArrayDOF(da,global,&aglobal)); 50 CHKERRQ(DMDAGetCorners(da,&xs,&ys,0,&m,&n,0)); 51 for (k=0; k<dof; k++) { 52 for (j=ys; j<ys+n; j++) { 53 for (i=xs; i<xs+m; i++) { 54 aglobal[j][i][k] = PetscSinScalar(2.0*PETSC_PI*(k+1)*xy[j][i][0]); 55 } 56 } 57 } 58 CHKERRQ(DMDAVecRestoreArrayDOF(da,global,&aglobal)); 59 CHKERRQ(DMDAVecRestoreArrayDOFRead(dac,coors,&xy)); 60 CHKERRQ(DMGlobalToLocalBegin(da,global,INSERT_VALUES,local)); 61 CHKERRQ(DMGlobalToLocalEnd(da,global,INSERT_VALUES,local)); 62 63 CHKERRQ(VecSet(global,0.0)); 64 CHKERRQ(DMLocalToGlobalBegin(da,local,INSERT_VALUES,global)); 65 CHKERRQ(DMLocalToGlobalEnd(da,local,INSERT_VALUES,global)); 66 CHKERRQ(VecView(global,PETSC_VIEWER_STDOUT_WORLD)); 67 CHKERRQ(VecView(global,viewer)); 68 69 /* Free memory */ 70 CHKERRQ(PetscViewerDestroy(&viewer)); 71 CHKERRQ(VecDestroy(&global)); 72 CHKERRQ(VecDestroy(&local)); 73 CHKERRQ(DMDestroy(&da)); 74 CHKERRQ(PetscFinalize()); 75 return 0; 76 } 77 78 /*TEST 79 80 test: 81 args: -dof 2 82 filter: grep -v -i Object 83 requires: x 84 85 test: 86 suffix: 2 87 nsize: 2 88 args: -dof 2 89 filter: grep -v -i Object 90 requires: x 91 92 test: 93 suffix: 3 94 nsize: 3 95 args: -dof 2 96 filter: grep -v -i Object 97 requires: x 98 99 TEST*/ 100