Actual source code: ex39.c


  2: static char help[] = "Tests mirror boundary conditions in 1-d.\n\n";

  4: #include <petscdm.h>
  5: #include <petscdmda.h>

  7: int main(int argc,char **argv)
  8: {
  9:   PetscInt       M = 6,stencil_width = 1, dof = 1,m,xstart,i,j;
 10:   DM             da;
 11:   Vec            global,local;
 12:   PetscScalar    **vglobal;
 13:   PetscViewer    sviewer;

 15:   PetscInitialize(&argc,&argv,(char*)0,help);
 16:   PetscOptionsGetInt(NULL,0,"-stencil_width",&stencil_width,0);
 17:   PetscOptionsGetInt(NULL,0,"-dof",&dof,0);

 19:   DMDACreate1d(PETSC_COMM_WORLD,DM_BOUNDARY_MIRROR,M,dof,stencil_width,NULL,&da);
 20:   DMSetFromOptions(da);
 21:   DMSetUp(da);
 22:   DMDAGetCorners(da,&xstart,0,0,&m,0,0);

 24:   DMCreateGlobalVector(da,&global);
 25:   DMDAVecGetArrayDOF(da,global,&vglobal);
 26:   for (i=xstart; i<xstart+m; i++) {
 27:     for (j=0; j<dof; j++) {
 28:       vglobal[i][j] = 100*(i+1) + j;
 29:     }
 30:   }
 31:   DMDAVecRestoreArrayDOF(da,global,&vglobal);

 33:   DMCreateLocalVector(da,&local);
 34:   DMGlobalToLocalBegin(da,global,INSERT_VALUES,local);
 35:   DMGlobalToLocalEnd(da,global,INSERT_VALUES,local);

 37:   PetscViewerGetSubViewer(PETSC_VIEWER_STDOUT_WORLD,PETSC_COMM_SELF,&sviewer);
 38:   VecView(local,sviewer);
 39:   PetscViewerRestoreSubViewer(PETSC_VIEWER_STDOUT_WORLD,PETSC_COMM_SELF,&sviewer);
 40:   PetscViewerFlush(PETSC_VIEWER_STDOUT_WORLD);
 41:   VecView(global,PETSC_VIEWER_STDOUT_WORLD);

 43:   DMDestroy(&da);
 44:   VecDestroy(&local);
 45:   VecDestroy(&global);

 47:   PetscFinalize();
 48:   return 0;
 49: }

 51: /*TEST

 53:    test:

 55:    test:
 56:       suffix: 2
 57:       nsize: 2
 58:       filter: grep -v "Vec Object"

 60: TEST*/