Actual source code: ex15.c

  2: static char help[] = "Tests DA interpolation.\n\n";

 4:  #include petscda.h

  8: int main(int argc,char **argv)
  9: {
 10:   PetscInt       M1 = 3,M2,dof = 1,s = 1,ratio = 2,dim = 1;
 12:   DA             da_c,da_f;
 13:   Vec            v_c,v_f;
 14:   Mat            I;
 15:   PetscScalar    one = 1.0;
 16:   DAPeriodicType pt = DA_NONPERIODIC;
 17: 
 18:   PetscInitialize(&argc,&argv,(char*)0,help);

 20:   PetscOptionsGetInt(PETSC_NULL,"-dim",&dim,PETSC_NULL);
 21:   PetscOptionsGetInt(PETSC_NULL,"-M",&M1,PETSC_NULL);
 22:   PetscOptionsGetInt(PETSC_NULL,"-stencil_width",&s,PETSC_NULL);
 23:   PetscOptionsGetInt(PETSC_NULL,"-ratio",&ratio,PETSC_NULL);
 24:   PetscOptionsGetInt(PETSC_NULL,"-dof",&dof,PETSC_NULL);
 25:   PetscOptionsGetTruth(PETSC_NULL,"-periodic",(PetscTruth*)&pt,PETSC_NULL);

 27:   if (pt != DA_NONPERIODIC) {
 28:     if (dim == 1) pt = DA_XPERIODIC;
 29:     if (dim == 2) pt = DA_XYPERIODIC;
 30:     if (dim == 3) pt = DA_XYZPERIODIC;
 31:   }
 32:   if (pt == DA_NONPERIODIC) {
 33:     M2   = ratio*(M1-1) + 1;
 34:   } else {
 35:     M2 = ratio*M1;
 36:   }

 38:   /* Set up the array */
 39:   if (dim == 1) {
 40:     DACreate1d(PETSC_COMM_WORLD,pt,M1,dof,s,PETSC_NULL,&da_c);
 41:     DACreate1d(PETSC_COMM_WORLD,pt,M2,dof,s,PETSC_NULL,&da_f);
 42:   } else if (dim == 2) {
 43:     DACreate2d(PETSC_COMM_WORLD,pt,DA_STENCIL_BOX,M1,M1,PETSC_DECIDE,PETSC_DECIDE,dof,s,PETSC_NULL,PETSC_NULL,&da_c);
 44:     DACreate2d(PETSC_COMM_WORLD,pt,DA_STENCIL_BOX,M2,M2,PETSC_DECIDE,PETSC_DECIDE,dof,s,PETSC_NULL,PETSC_NULL,&da_f);
 45:   } else if (dim == 3) {
 46:     DACreate3d(PETSC_COMM_WORLD,pt,DA_STENCIL_BOX,M1,M1,M1,PETSC_DECIDE,PETSC_DECIDE,PETSC_DECIDE,dof,s,PETSC_NULL,PETSC_NULL,PETSC_NULL,&da_c);
 47:     DACreate3d(PETSC_COMM_WORLD,pt,DA_STENCIL_BOX,M2,M2,M2,PETSC_DECIDE,PETSC_DECIDE,PETSC_DECIDE,dof,s,PETSC_NULL,PETSC_NULL,PETSC_NULL,&da_f);
 48:   }

 50:   DACreateGlobalVector(da_c,&v_c);
 51:   DACreateGlobalVector(da_f,&v_f);

 53:   VecSet(v_c,one);
 54:   DAGetInterpolation(da_c,da_f,&I,PETSC_NULL);
 55:   MatMult(I,v_c,v_f);
 56:   VecView(v_f,PETSC_VIEWER_STDOUT_WORLD);
 57:   MatMultTranspose(I,v_f,v_c);
 58:   VecView(v_c,PETSC_VIEWER_STDOUT_WORLD);

 60:   MatDestroy(I);
 61:   VecDestroy(v_c);
 62:   DADestroy(da_c);
 63:   VecDestroy(v_f);
 64:   DADestroy(da_f);
 65:   PetscFinalize();
 66:   return 0;
 67: }
 68: