230 lines
7.7 KiB
C
230 lines
7.7 KiB
C
/*BHEADER**********************************************************************
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* Copyright (c) 2006 The Regents of the University of California.
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* Produced at the Lawrence Livermore National Laboratory.
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* Written by the HYPRE team. UCRL-CODE-222953.
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* All rights reserved.
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*
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* This file is part of HYPRE (see http://www.llnl.gov/CASC/hypre/).
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* Please see the COPYRIGHT_and_LICENSE file for the copyright notice,
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* disclaimer, contact information and the GNU Lesser General Public License.
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*
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* HYPRE is free software; you can redistribute it and/or modify it under the
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* terms of the GNU General Public License (as published by the Free Software
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* Foundation) version 2.1 dated February 1999.
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*
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* HYPRE is distributed in the hope that it will be useful, but WITHOUT ANY
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* WARRANTY; without even the IMPLIED WARRANTY OF MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the terms and conditions of the GNU General
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* Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* $Revision$
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***********************************************************************EHEADER*/
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#include "headers.h"
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#include "fac.h"
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#define AbsStencilShape(stencil, abs_shape) \
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{\
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int ii,jj,kk;\
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ii = hypre_IndexX(stencil);\
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jj = hypre_IndexY(stencil);\
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kk = hypre_IndexZ(stencil);\
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abs_shape= abs(ii) + abs(jj) + abs(kk); \
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}
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/*--------------------------------------------------------------------------
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* hypre_CFInterfaceExtents: Given a cgrid_box, a fgrid_box, and stencils,
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* find the extents of the C/F interface (interface nodes in the C box).
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* Boxes corresponding to stencil shifts are stored in the first stencil_size
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* boxes, and the union of these are appended to the end of the returned
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* box_array.
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*--------------------------------------------------------------------------*/
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hypre_BoxArray *
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hypre_CFInterfaceExtents( hypre_Box *fgrid_box,
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hypre_Box *cgrid_box,
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hypre_StructStencil *stencils,
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hypre_Index rfactors )
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{
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hypre_BoxArray *stencil_box_extents;
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hypre_BoxArray *union_boxes;
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hypre_Box *cfine_box;
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hypre_Box *box;
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hypre_Index stencil_shape, cstart, zero_index, neg_index;
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int stencil_size;
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int abs_stencil;
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int ndim= hypre_StructStencilDim(stencils);
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int i, j;
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hypre_ClearIndex(zero_index);
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hypre_ClearIndex(neg_index);
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for (i= 0; i< ndim; i++)
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{
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neg_index[i]= -1;
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}
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hypre_CopyIndex(hypre_BoxIMin(cgrid_box), cstart);
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stencil_size = hypre_StructStencilSize(stencils);
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stencil_box_extents= hypre_BoxArrayCreate(stencil_size);
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union_boxes = hypre_BoxArrayCreate(0);
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for (i= 0; i< stencil_size; i++)
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{
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hypre_CopyIndex(hypre_StructStencilElement(stencils, i), stencil_shape);
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AbsStencilShape(stencil_shape, abs_stencil);
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if (abs_stencil) /* only do if not the centre stencil */
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{
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cfine_box= hypre_CF_StenBox(fgrid_box, cgrid_box, stencil_shape, rfactors,
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ndim);
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if ( hypre_BoxVolume(cfine_box) )
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{
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hypre_AppendBox(cfine_box, union_boxes);
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hypre_CopyBox(cfine_box, hypre_BoxArrayBox(stencil_box_extents, i));
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for (j= 0; j< ndim; j++)
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{
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hypre_BoxIMin(cfine_box)[j]-= cstart[j];
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hypre_BoxIMax(cfine_box)[j]-= cstart[j];
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}
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hypre_CopyBox(cfine_box, hypre_BoxArrayBox(stencil_box_extents, i));
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}
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else
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{
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hypre_BoxSetExtents(hypre_BoxArrayBox(stencil_box_extents, i),
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zero_index, neg_index);
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}
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hypre_BoxDestroy(cfine_box);
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}
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else /* centre */
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{
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hypre_BoxSetExtents(hypre_BoxArrayBox(stencil_box_extents, i),
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zero_index, neg_index);
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}
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}
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/*--------------------------------------------------------------------------
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* Union the stencil_box_extents to get the full CF extents and append to
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* the end of the stencil_box_extents BoxArray. Then shift the unioned boxes
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* by cstart.
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*--------------------------------------------------------------------------*/
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if (hypre_BoxArraySize(union_boxes) > 1)
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{
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hypre_UnionBoxes(union_boxes);
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}
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hypre_ForBoxI(i, union_boxes)
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{
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hypre_AppendBox(hypre_BoxArrayBox(union_boxes, i), stencil_box_extents);
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}
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hypre_BoxArrayDestroy(union_boxes);
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for (i= stencil_size; i< hypre_BoxArraySize(stencil_box_extents); i++)
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{
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box= hypre_BoxArrayBox(stencil_box_extents, i);
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for (j= 0; j< ndim; j++)
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{
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hypre_BoxIMin(box)[j]-= cstart[j];
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hypre_BoxIMax(box)[j]-= cstart[j];
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}
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}
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return stencil_box_extents;
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}
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int
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hypre_CFInterfaceExtents2( hypre_Box *fgrid_box,
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hypre_Box *cgrid_box,
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hypre_StructStencil *stencils,
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hypre_Index rfactors,
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hypre_BoxArray *cf_interface )
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{
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hypre_BoxArray *stencil_box_extents;
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hypre_BoxArray *union_boxes;
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hypre_Box *cfine_box;
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hypre_Index stencil_shape, zero_index, neg_index;
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int stencil_size;
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int abs_stencil;
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int ndim= hypre_StructStencilDim(stencils);
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int i;
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int ierr= 0;
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hypre_ClearIndex(zero_index);
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hypre_ClearIndex(neg_index);
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for (i= 0; i< ndim; i++)
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{
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neg_index[i]= -1;
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}
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stencil_size = hypre_StructStencilSize(stencils);
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stencil_box_extents= hypre_BoxArrayCreate(stencil_size);
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union_boxes = hypre_BoxArrayCreate(0);
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for (i= 0; i< stencil_size; i++)
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{
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hypre_CopyIndex(hypre_StructStencilElement(stencils, i), stencil_shape);
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AbsStencilShape(stencil_shape, abs_stencil);
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if (abs_stencil) /* only do if not the centre stencil */
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{
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cfine_box= hypre_CF_StenBox(fgrid_box, cgrid_box, stencil_shape,
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rfactors, ndim);
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if ( hypre_BoxVolume(cfine_box) )
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{
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hypre_AppendBox(cfine_box, union_boxes);
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hypre_CopyBox(cfine_box, hypre_BoxArrayBox(stencil_box_extents, i));
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}
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else
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{
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hypre_BoxSetExtents(hypre_BoxArrayBox(stencil_box_extents, i),
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zero_index, neg_index);
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}
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hypre_BoxDestroy(cfine_box);
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}
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else /* centre */
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{
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hypre_BoxSetExtents(hypre_BoxArrayBox(stencil_box_extents, i),
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zero_index, neg_index);
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}
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}
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/*--------------------------------------------------------------------------
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* Union the stencil_box_extents to get the full CF extents and append to
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* the end of the stencil_box_extents BoxArray.
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*--------------------------------------------------------------------------*/
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if (hypre_BoxArraySize(union_boxes) > 1)
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{
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hypre_UnionBoxes(union_boxes);
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}
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hypre_ForBoxI(i, union_boxes)
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{
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hypre_AppendBox(hypre_BoxArrayBox(union_boxes, i), stencil_box_extents);
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}
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hypre_AppendBoxArray(stencil_box_extents, cf_interface);
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hypre_BoxArrayDestroy(union_boxes);
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hypre_BoxArrayDestroy(stencil_box_extents);
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return ierr;
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}
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