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(* Copyright 2004 Sascha Husa, Ian Hinder, Christiane Lechner
This file is part of Kranc.
Kranc is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
Kranc is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Kranc; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*)
BeginPackage["CalculationBoundaries`", {"Errors`", "Helpers`",
"CodeGenKranc`", "Kranc`", "MapLookup`", "KrancGroups`", "CodeGen`", "CodeGenCactus`", "CodeGenC`"}];
CalculationBoundariesFunction;
Begin["`Private`"];
(* This function is duplicated in Schedule.m. It should be moved into
another place. *)
groupsSetInCalc[calc_, groups_] :=
Module[{gfs, eqs, lhss, gfsInLHS, lhsGroupNames},
gfs = allGroupVariables[groups];
eqs = lookup[calc, Equations];
lhss = Map[First, eqs];
gfsInLHS = Union[Cases[lhss, _ ? (MemberQ[gfs,#] &), Infinity]];
lhsGroupNames = containingGroups[gfsInLHS, groups];
Return[lhsGroupNames]
];
(* Given a calculation, create a function which selects the groups set
in that calculation for a boundary condition. This is designed to
be used for calculations scheduled in MoL_PseudoEvolution, NOT for
evolved variables. Currently only a flat boundary condition is
implemented. *)
CalculationBoundariesFunction[calc_List] :=
Module[{funcName, selectGroup, groups, groupNamesSet, imp},
funcName = lookup[calc, Name];
imp = lookup[calc,Implementation];
(* If the calculation sets every grid point, we don't need to apply
any boundary condition *)
If[lookupDefault[calc, Where, Everywhere] === Everywhere,
Return[{}]];
(* The boundary interface allows you to give different boundary
widths for each boundary face. However, this is not compatible
with ReflectionSymmetry, so we don't allow it here.*)
selectGroup[g_String] :=
Module[{},
{(* "table = GenericFD_BoundaryWidthTable(cctkGH);\n", *)
"ierr = Boundary_SelectGroupForBC(cctkGH, CCTK_ALL_FACES, GenericFD_GetBoundaryWidth(cctkGH), -1 /* no table */, ",
Quote[g], ",", Quote["flat"], ");\n",
"if (ierr < 0)\n",
" CCTK_WARN(1, " <> Quote["Failed to register flat BC for "<>g<>"."] <> ");\n" }];
groups = lookup[calc, Groups];
groupNamesSet = qualifyGroupName[#, imp] & /@ groupsSetInCalc[calc, groups];
DefineCCTKFunction[funcName <> "_SelectBCs", "void",
{
"if (cctk_iteration % " <> funcName <> "_calc_every != " <> funcName <> "_calc_offset)\n",
" return;\n",
DefineVariable["ierr", "CCTK_INT", "0"],
(* DefineVariable["table", "CCTK_INT", "-1"],*)
Map[selectGroup, groupNamesSet],
"return;\n"
}]];
End[];
EndPackage[];
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