97 lines
3.2 KiB
C
97 lines
3.2 KiB
C
/*BHEADER**********************************************************************
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* (c) 1997 The Regents of the University of California
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*
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* See the file COPYRIGHT_and_DISCLAIMER for a complete copyright
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* notice, contact person, and disclaimer.
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*
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* $Revision$
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*********************************************************************EHEADER*/
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/******************************************************************************
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*
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* Routines for "growing" boxes.
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*
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*****************************************************************************/
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#include "headers.h"
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/*--------------------------------------------------------------------------
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* hypre_GrowBoxByStencil:
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* The argument `transpose' is a boolean that indicates whether
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* or not to use the transpose of the stencil.
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*--------------------------------------------------------------------------*/
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hypre_BoxArray *
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hypre_GrowBoxByStencil( hypre_Box *box,
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hypre_StructStencil *stencil,
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int transpose )
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{
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hypre_BoxArray *grow_box_array;
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hypre_BoxArray *shift_box_array;
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hypre_Box *shift_box;
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hypre_Index *stencil_shape;
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int s, d;
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stencil_shape = hypre_StructStencilShape(stencil);
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shift_box_array = hypre_BoxArrayCreate(hypre_StructStencilSize(stencil));
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shift_box = hypre_BoxCreate();
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for (s = 0; s < hypre_StructStencilSize(stencil); s++)
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{
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if (transpose)
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for (d = 0; d < 3; d++)
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{
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hypre_BoxIMinD(shift_box, d) =
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hypre_BoxIMinD(box, d) - hypre_IndexD(stencil_shape[s], d);
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hypre_BoxIMaxD(shift_box, d) =
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hypre_BoxIMaxD(box, d) - hypre_IndexD(stencil_shape[s], d);
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}
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else
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for (d = 0; d < 3; d++)
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{
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hypre_BoxIMinD(shift_box, d) =
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hypre_BoxIMinD(box, d) + hypre_IndexD(stencil_shape[s], d);
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hypre_BoxIMaxD(shift_box, d) =
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hypre_BoxIMaxD(box, d) + hypre_IndexD(stencil_shape[s], d);
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}
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hypre_CopyBox(shift_box, hypre_BoxArrayBox(shift_box_array, s));
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}
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hypre_BoxDestroy(shift_box);
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hypre_UnionBoxes(shift_box_array);
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grow_box_array = shift_box_array;
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return grow_box_array;
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}
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/*--------------------------------------------------------------------------
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* hypre_GrowBoxArrayByStencil:
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*--------------------------------------------------------------------------*/
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hypre_BoxArrayArray *
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hypre_GrowBoxArrayByStencil( hypre_BoxArray *box_array,
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hypre_StructStencil *stencil,
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int transpose )
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{
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hypre_BoxArrayArray *grow_box_array_array;
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int i;
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grow_box_array_array =
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hypre_BoxArrayArrayCreate(hypre_BoxArraySize(box_array));
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hypre_ForBoxI(i, box_array)
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{
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hypre_BoxArrayDestroy(
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hypre_BoxArrayArrayBoxArray(grow_box_array_array, i));
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hypre_BoxArrayArrayBoxArray(grow_box_array_array, i) =
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hypre_GrowBoxByStencil(hypre_BoxArrayBox(box_array, i),
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stencil, transpose);
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}
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return grow_box_array_array;
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}
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