Actual source code: ex15.c

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

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

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

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

 28:   if (pt != DA_NONPERIODIC) {
 29:     if (dim == 1) pt = DA_XPERIODIC;
 30:     if (dim == 2) pt = DA_XYPERIODIC;
 31:     if (dim == 3) pt = DA_XYZPERIODIC;
 32:   }
 33:   if (pt == DA_NONPERIODIC) {
 34:     M2   = ratio*(M1-1) + 1;
 35:   } else {
 36:     M2 = ratio*M1;
 37:   }

 39:   /* Set up the array */
 40:   if (dim == 1) {
 41:     DACreate1d(PETSC_COMM_WORLD,pt,M1,dof,s,PETSC_NULL,&da_c);
 42:     DACreate1d(PETSC_COMM_WORLD,pt,M2,dof,s,PETSC_NULL,&da_f);
 43:   } else if (dim == 2) {
 44:     DACreate2d(PETSC_COMM_WORLD,pt,DA_STENCIL_BOX,M1,M1,PETSC_DECIDE,PETSC_DECIDE,dof,s,PETSC_NULL,PETSC_NULL,&da_c);
 45:     DACreate2d(PETSC_COMM_WORLD,pt,DA_STENCIL_BOX,M2,M2,PETSC_DECIDE,PETSC_DECIDE,dof,s,PETSC_NULL,PETSC_NULL,&da_f);
 46:   } else if (dim == 3) {
 47:     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);
 48:     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);
 49:   }

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

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

 61:   MatDestroy(I);
 62:   VecDestroy(v_c);
 63:   DADestroy(da_c);
 64:   VecDestroy(v_f);
 65:   DADestroy(da_f);
 66:   PetscFinalize();
 67:   return 0;
 68: }
 69: