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#include <algorithm>
#include <cassert>
#include <cmath>
#include <cstdlib>
#include <cctk.h>
#include <cctk_Parameters.h>
#include "operator_prototypes.hh"
#include "typeprops.hh"
using namespace std;
namespace CarpetLib {
#define SRCIND3(i,j,k) \
index3 (srcioff + (i), srcjoff + (j), srckoff + (k), \
srciext, srcjext, srckext)
#define DSTIND3(i,j,k) \
index3 (dstioff + (i), dstjoff + (j), dstkoff + (k), \
dstiext, dstjext, dstkext)
template <typename T>
void
interpolate_3d_2tl (T const * restrict const src1,
CCTK_REAL const t1,
T const * restrict const src2,
CCTK_REAL const t2,
ivect3 const & srcext,
T * restrict const dst,
CCTK_REAL const t,
ivect3 const & dstext,
ibbox3 const & srcbbox,
ibbox3 const & dstbbox,
ibbox3 const & regbbox)
{
typedef typename typeprops<T>::real RT;
#if 0
// This is already guaranteed by bbox
if (any (srcbbox.stride() == 0 or
dstbbox.stride() == 0 or
regbbox.stride() == 0))
{
CCTK_WARN (0, "Internal error: stride is zero");
}
#endif
if (any (srcbbox.stride() != regbbox.stride() or
dstbbox.stride() != regbbox.stride()))
{
CCTK_WARN (0, "Internal error: strides disagree");
}
if (any (srcbbox.stride() != dstbbox.stride())) {
CCTK_WARN (0, "Internal error: strides disagree");
}
#if 0
// This needs to be allowed for cell centring
if (any (srcbbox.lower() % srcbbox.stride() != 0 or
dstbbox.lower() % dstbbox.stride() != 0 or
regbbox.lower() % regbbox.stride() != 0))
{
CCTK_WARN (0, "Internal error: array origins are not integer multiples of the strides");
}
#endif
// This could be handled, but is likely to point to an error
// elsewhere
if (regbbox.empty()) {
CCTK_WARN (0, "Internal error: region extent is empty");
}
#if 0
// This is already guaranteed by bbox
if (any ((srcbbox.upper() - srcbbox.lower()) % srcbbox.stride() != 0 or
(dstbbox.upper() - dstbbox.lower()) % dstbbox.stride() != 0 or
(regbbox.upper() - regbbox.lower()) % regbbox.stride() != 0))
{
CCTK_WARN (0, "Internal error: array extents are not integer multiples of the strides");
}
#endif
if (not regbbox.is_contained_in(srcbbox) or
not regbbox.is_contained_in(dstbbox))
{
CCTK_WARN (0, "Internal error: region extent is not contained in array extent");
}
if (any (srcext != srcbbox.shape() / srcbbox.stride() or
dstext != dstbbox.shape() / dstbbox.stride()))
{
CCTK_WARN (0, "Internal error: array sizes don't agree with bounding boxes");
}
ivect3 const regext = regbbox.shape() / regbbox.stride();
assert (all ((regbbox.lower() - srcbbox.lower()) % srcbbox.stride() == 0));
ivect3 const srcoff = (regbbox.lower() - srcbbox.lower()) / srcbbox.stride();
assert (all ((regbbox.lower() - dstbbox.lower()) % dstbbox.stride() == 0));
ivect3 const dstoff = (regbbox.lower() - dstbbox.lower()) / dstbbox.stride();
size_t const srciext = srcext[0];
size_t const srcjext = srcext[1];
size_t const srckext = srcext[2];
size_t const dstiext = dstext[0];
size_t const dstjext = dstext[1];
size_t const dstkext = dstext[2];
size_t const regiext = regext[0];
size_t const regjext = regext[1];
size_t const regkext = regext[2];
size_t const srcioff = srcoff[0];
size_t const srcjoff = srcoff[1];
size_t const srckoff = srcoff[2];
size_t const dstioff = dstoff[0];
size_t const dstjoff = dstoff[1];
size_t const dstkoff = dstoff[2];
// Linear (first order) interpolation
RT const eps = 1.0e-10;
if (abs (t1 - t2) < eps) {
CCTK_WARN (0, "Internal error: arrays have same time");
}
if (t < min (t1, t2) - eps or t > max (t1, t2) + eps) {
CCTK_WARN (0, "Internal error: extrapolation in time");
}
RT const s1fac = (t - t2) / (t1 - t2);
RT const s2fac = (t - t1) / (t2 - t1);
// Loop over region
for (size_t k=0; k<regkext; ++k) {
for (size_t j=0; j<regjext; ++j) {
for (size_t i=0; i<regiext; ++i) {
dst [DSTIND3(i, j, k)] =
+ s1fac * src1 [SRCIND3(i, j, k)]
+ s2fac * src2 [SRCIND3(i, j, k)];
}
}
}
}
template
void
interpolate_3d_2tl (CCTK_REAL const * restrict const src1,
CCTK_REAL const t1,
CCTK_REAL const * restrict const src2,
CCTK_REAL const t2,
ivect3 const & srcext,
CCTK_REAL * restrict const dst,
CCTK_REAL const t,
ivect3 const & dstext,
ibbox3 const & srcbbox,
ibbox3 const & dstbbox,
ibbox3 const & regbbox);
template
void
interpolate_3d_2tl (CCTK_COMPLEX const * restrict const src1,
CCTK_REAL const t1,
CCTK_COMPLEX const * restrict const src2,
CCTK_REAL const t2,
ivect3 const & srcext,
CCTK_COMPLEX * restrict const dst,
CCTK_REAL const t,
ivect3 const & dstext,
ibbox3 const & srcbbox,
ibbox3 const & dstbbox,
ibbox3 const & regbbox);
} // namespace CarpetLib
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