Actual source code: ex17.c

  1: /*$Id: ex17.c,v 1.9 2001/08/07 03:04:42 balay Exp $*/

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

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

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

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

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

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

 37:   DACreateGlobalVector(da_c,&v_c);
 38:   DACreateGlobalVector(da_f,&v_f);

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

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