Schematic DAGH example
bb[0]=xmin; bb[1]=xmax; bb[2]=ymin; bb[3]=ymax;
shape[0]=Nx; shape[1]=Ny;
GridHierarchy GH(2,NON_CELL_CENTERED,1);
GH.ACE_SetBaseGrid(bb, shape);
GH.ACE_ComposeHierarchy();
GH.ACE_IOType(ACEIO_HDF_RNPL);
GridFunction(2)<double> phi("phi",1,1,GH,ACEComm,ACENoShadow);
for(step++;step<=iter;step++)
phi.GF_Sync(tc+idt,lev,ACE_Main);
Unigrid wave equation in 2D, Cartesian coordinates: