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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "cctk.h"
/*@@
@routine IndexFloor
@date Fri Jan 7 10:34:29 2000
@author Gerd Lanfermann
@desc
For a given physical, global coordinate, IndexFloor returns
the closest lower grid index *locally* in the direction d,
this includes ghostzones;
Other return values:
-1 : gridindex not on this gridpatch
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
int IndexFloorC(cGH *GH, CCTK_REAL coord_value, int d)
{
int index_low,idummy;
char *message;
CCTK_REAL cmin,cmax;
if (d==0)
{
CCTK_CoordRange(GH,&cmin,&cmax, 1, "x", "cart3d");
}
else if (d==1)
{
CCTK_CoordRange(GH,&cmin,&cmax, 2, "y", "cart3d");
}
else if (d==2)
{
CCTK_CoordRange(GH,&cmin,&cmax, 3, "z", "cart3d");
}
else
{
CCTK_WARN(0,"IndexFloor: dimension is not valid. Fortran:1..3 C:0..2");
}
if ((coord_value<cmin)||(coord_value>cmax))
{
CCTK_VWarn(2,__LINE__,__FILE__,CCTK_THORNSTRING,
"IndexFloor: coordinate value outside grid [%f,%f]: %f \n",
cmin, cmax, coord_value);
return(-3);
}
idummy = floor((coord_value-cmin)/ GH->cctk_delta_space[d]);
index_low = idummy-GH->cctk_lbnd[d];
if (index_low<0)
{
index_low = -1;
}
if (index_low>=GH->cctk_lsh[d])
{
index_low = -1;
}
return(index_low);
}
/*@@
@routine IndexCeil
@date Fri Jan 7 10:34:29 2000
@author Gerd Lanfermann
@desc
For a given physical, global coordinate, IndexCeil returns
the closest upper grid index *locally* in the direction d
including ghostzones.
Other return values:
-1 : grid index not on this gridpatch
@enddesc
@calls
@calledby
@history
@endhistory
@@*/
int IndexCeilC(cGH *GH, CCTK_REAL coord_value, int d)
{
int index_up,idummy;
char *message;
CCTK_REAL cmin,cmax;
if (d==0)
{
CCTK_CoordRange(GH,&cmin,&cmax, -1, "x", "cart3d");
}
else if (d==1)
{
CCTK_CoordRange(GH,&cmin,&cmax, -1, "y", "cart3d");
}
else if (d==2)
{
CCTK_CoordRange(GH,&cmin,&cmax, -1, "z", "cart3d");
}
else
{
CCTK_WARN(0,"IndexCeilC: dimension is not valid. Fortran:1..3 C:0..2");
}
if ((coord_value<cmin)||(coord_value>cmax))
{
CCTK_VWarn(2,__LINE__,__FILE__,CCTK_THORNSTRING,
"IndexCeil: coordinate value outside grid [%f,%f]: %f \n",
cmin,cmax, coord_value);
return(-3);
}
idummy = ceil((coord_value-cmin)/ GH->cctk_delta_space[d]);
index_up = idummy-GH->cctk_lbnd[d];
if (index_up<0)
{
index_up = -1;
}
if (index_up>=GH->cctk_lsh[d])
{
index_up = -1;
}
return(index_up);
}
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