Actual source code: ex15.c

  1: /*$Id: ex15.c,v 1.10 2001/08/07 03:04:42 balay Exp $*/

  3: static char help[] = "Tests DA interpolation.nn";

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

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

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

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

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

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

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

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