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 PetscFunctionBeginUser; 18 PetscCall(PetscInitialize(&argc,&argv,(char*)0,help)); 19 /* Create viewers */ 20 PetscCall(PetscViewerDrawOpen(PETSC_COMM_WORLD,0,"",PETSC_DECIDE,PETSC_DECIDE,600,200,&viewer)); 21 PetscCall(PetscViewerDrawGetDraw(viewer,0,&draw)); 22 PetscCall(PetscDrawSetDoubleBuffer(draw)); 23 24 /* Read options */ 25 PetscCall(PetscOptionsGetInt(NULL,NULL,"-M",&M,NULL)); 26 PetscCall(PetscOptionsGetInt(NULL,NULL,"-N",&N,NULL)); 27 PetscCall(PetscOptionsGetInt(NULL,NULL,"-dof",&dof,NULL)); 28 PetscCall(PetscOptionsGetInt(NULL,NULL,"-s",&s,NULL)); 29 PetscCall(PetscOptionsGetInt(NULL,NULL,"-periodic_x",&wrap,NULL)); 30 PetscCall(PetscOptionsGetInt(NULL,NULL,"-periodic_y",&wrap,NULL)); 31 32 /* Create distributed array and get vectors */ 33 PetscCall(DMDACreate2d(PETSC_COMM_WORLD,(DMBoundaryType)bx,(DMBoundaryType)by,DMDA_STENCIL_BOX,M,N,PETSC_DECIDE,PETSC_DECIDE,dof,s,NULL,NULL,&da)); 34 PetscCall(DMSetFromOptions(da)); 35 PetscCall(DMSetUp(da)); 36 PetscCall(DMDASetUniformCoordinates(da,0.0,1.0,0.0,1.0,0.0,0.0)); 37 for (i=0; i<dof; i++) { 38 sprintf(fname,"Field %d",(int)i); 39 PetscCall(DMDASetFieldName(da,i,fname)); 40 } 41 42 PetscCall(DMView(da,viewer)); 43 PetscCall(DMCreateGlobalVector(da,&global)); 44 PetscCall(DMCreateLocalVector(da,&local)); 45 PetscCall(DMGetCoordinates(da,&coors)); 46 PetscCall(DMGetCoordinateDM(da,&dac)); 47 48 /* Set values into global vectors */ 49 PetscCall(DMDAVecGetArrayDOFRead(dac,coors,&xy)); 50 PetscCall(DMDAVecGetArrayDOF(da,global,&aglobal)); 51 PetscCall(DMDAGetCorners(da,&xs,&ys,0,&m,&n,0)); 52 for (k=0; k<dof; k++) { 53 for (j=ys; j<ys+n; j++) { 54 for (i=xs; i<xs+m; i++) { 55 aglobal[j][i][k] = PetscSinScalar(2.0*PETSC_PI*(k+1)*xy[j][i][0]); 56 } 57 } 58 } 59 PetscCall(DMDAVecRestoreArrayDOF(da,global,&aglobal)); 60 PetscCall(DMDAVecRestoreArrayDOFRead(dac,coors,&xy)); 61 PetscCall(DMGlobalToLocalBegin(da,global,INSERT_VALUES,local)); 62 PetscCall(DMGlobalToLocalEnd(da,global,INSERT_VALUES,local)); 63 64 PetscCall(VecSet(global,0.0)); 65 PetscCall(DMLocalToGlobalBegin(da,local,INSERT_VALUES,global)); 66 PetscCall(DMLocalToGlobalEnd(da,local,INSERT_VALUES,global)); 67 PetscCall(VecView(global,PETSC_VIEWER_STDOUT_WORLD)); 68 PetscCall(VecView(global,viewer)); 69 70 /* Free memory */ 71 PetscCall(PetscViewerDestroy(&viewer)); 72 PetscCall(VecDestroy(&global)); 73 PetscCall(VecDestroy(&local)); 74 PetscCall(DMDestroy(&da)); 75 PetscCall(PetscFinalize()); 76 return 0; 77 } 78 79 /*TEST 80 81 test: 82 args: -dof 2 83 filter: grep -v -i Object 84 requires: x 85 86 test: 87 suffix: 2 88 nsize: 2 89 args: -dof 2 90 filter: grep -v -i Object 91 requires: x 92 93 test: 94 suffix: 3 95 nsize: 3 96 args: -dof 2 97 filter: grep -v -i Object 98 requires: x 99 100 TEST*/ 101