Actual source code: ex17.c

  2: static char help[] = "Tests DA interpolation for coarse DA on a subset of processors.\n\n";

 4:  #include petscda.h
 5:  #include petscsys.h

  9: int main(int argc,char **argv)
 10: {
 11:   PetscInt       M = 14,dof = 1,s = 1,ratio = 2,dim = 2;
 13:   DA             da_c,da_f;
 14:   Vec            v_c,v_f;
 15:   Mat            I;
 16:   PetscScalar    one = 1.0;
 17:   MPI_Comm       comm_f, comm_c;

 19:   PetscInitialize(&argc,&argv,(char*)0,help);

 21:   PetscOptionsGetInt(PETSC_NULL,"-dim",&dim,PETSC_NULL);
 22:   PetscOptionsGetInt(PETSC_NULL,"-M",&M,PETSC_NULL);
 23:   PetscOptionsGetInt(PETSC_NULL,"-sw",&s,PETSC_NULL);
 24:   PetscOptionsGetInt(PETSC_NULL,"-ratio",&ratio,PETSC_NULL);
 25:   PetscOptionsGetInt(PETSC_NULL,"-dof",&dof,PETSC_NULL);

 27:   comm_f = PETSC_COMM_WORLD;
 28:   DASplitComm2d(comm_f,M,M,s,&comm_c);
 29: 
 30:   /* Set up the array */
 31:   if (dim == 2) {
 32:     DACreate2d(comm_c,DA_NONPERIODIC,DA_STENCIL_BOX,M,M,PETSC_DECIDE,PETSC_DECIDE,dof,s,PETSC_NULL,PETSC_NULL,&da_c);
 33:     M    = ratio*(M-1) + 1;
 34:     DACreate2d(comm_f,DA_NONPERIODIC,DA_STENCIL_BOX,M,M,PETSC_DECIDE,PETSC_DECIDE,dof,s,PETSC_NULL,PETSC_NULL,&da_f);
 35:   } else if (dim == 3) {
 36:     ;
 37:   }

 39:   DACreateGlobalVector(da_c,&v_c);
 40:   DACreateGlobalVector(da_f,&v_f);

 42:   VecSet(v_c,one);
 43:   DAGetInterpolation(da_c,da_f,&I,PETSC_NULL);
 44:   MatInterpolate(I,v_c,v_f);
 45:   VecView(v_f,PETSC_VIEWER_STDOUT_(comm_f));
 46:   MatRestrict(I,v_f,v_c);
 47:   VecView(v_c,PETSC_VIEWER_STDOUT_(comm_c));

 49:   MatDestroy(I);
 50:   VecDestroy(v_c);
 51:   DADestroy(da_c);
 52:   VecDestroy(v_f);
 53:   DADestroy(da_f);
 54:   PetscFinalize();
 55:   return 0;
 56: }
 57: