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 PetscCall(PetscInitialize(&argc,&argv,(char*)0,help)); 18 /* Create viewers */ 19 PetscCall(PetscViewerDrawOpen(PETSC_COMM_WORLD,0,"",PETSC_DECIDE,PETSC_DECIDE,600,200,&viewer)); 20 PetscCall(PetscViewerDrawGetDraw(viewer,0,&draw)); 21 PetscCall(PetscDrawSetDoubleBuffer(draw)); 22 23 /* Read options */ 24 PetscCall(PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL)); 25 PetscCall(PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL)); 26 PetscCall(PetscOptionsGetInt(NULL,NULL,"-dof",&dof,NULL)); 27 PetscCall(PetscOptionsGetInt(NULL,NULL,"-s",&s,NULL)); 28 PetscCall(PetscOptionsGetInt(NULL,NULL,"-periodic_x",&wrap,NULL)); 29 PetscCall(PetscOptionsGetInt(NULL,NULL,"-periodic_y",&wrap,NULL)); 30 31 /* Create distributed array and get vectors */ 32 PetscCall(DMDACreate2d(PETSC_COMM_WORLD,(DMBoundaryType)bx,(DMBoundaryType)by,DMDA_STENCIL_BOX,M,N,PETSC_DECIDE,PETSC_DECIDE,dof,s,NULL,NULL,&da)); 33 PetscCall(DMSetFromOptions(da)); 34 PetscCall(DMSetUp(da)); 35 PetscCall(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 PetscCall(DMDASetFieldName(da,i,fname)); 39 } 40 41 PetscCall(DMView(da,viewer)); 42 PetscCall(DMCreateGlobalVector(da,&global)); 43 PetscCall(DMCreateLocalVector(da,&local)); 44 PetscCall(DMGetCoordinates(da,&coors)); 45 PetscCall(DMGetCoordinateDM(da,&dac)); 46 47 /* Set values into global vectors */ 48 PetscCall(DMDAVecGetArrayDOFRead(dac,coors,&xy)); 49 PetscCall(DMDAVecGetArrayDOF(da,global,&aglobal)); 50 PetscCall(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 PetscCall(DMDAVecRestoreArrayDOF(da,global,&aglobal)); 59 PetscCall(DMDAVecRestoreArrayDOFRead(dac,coors,&xy)); 60 PetscCall(DMGlobalToLocalBegin(da,global,INSERT_VALUES,local)); 61 PetscCall(DMGlobalToLocalEnd(da,global,INSERT_VALUES,local)); 62 63 PetscCall(VecSet(global,0.0)); 64 PetscCall(DMLocalToGlobalBegin(da,local,INSERT_VALUES,global)); 65 PetscCall(DMLocalToGlobalEnd(da,local,INSERT_VALUES,global)); 66 PetscCall(VecView(global,PETSC_VIEWER_STDOUT_WORLD)); 67 PetscCall(VecView(global,viewer)); 68 69 /* Free memory */ 70 PetscCall(PetscViewerDestroy(&viewer)); 71 PetscCall(VecDestroy(&global)); 72 PetscCall(VecDestroy(&local)); 73 PetscCall(DMDestroy(&da)); 74 PetscCall(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