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Diffstat (limited to 'Carpet/CarpetLib/src/interpolate_3d_3tl.cc')
| -rw-r--r-- | Carpet/CarpetLib/src/interpolate_3d_3tl.cc | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/Carpet/CarpetLib/src/interpolate_3d_3tl.cc b/Carpet/CarpetLib/src/interpolate_3d_3tl.cc new file mode 100644 index 000000000..04d0e1e94 --- /dev/null +++ b/Carpet/CarpetLib/src/interpolate_3d_3tl.cc @@ -0,0 +1,208 @@ +#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_3tl (T const * restrict const src1, + CCTK_REAL const t1, + T const * restrict const src2, + CCTK_REAL const t2, + T const * restrict const src3, + CCTK_REAL const t3, + 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]; + + + + // Quadratic (second order) interpolation + + RT const eps = 1.0e-10; + + if (abs (t1 - t2) < eps or abs (t1 - t3) < eps or abs (t2 - t3) < eps) { + CCTK_WARN (0, "Internal error: arrays have same time"); + } + if (t < min (min (t1, t2), t3) - eps or t > max (max (t1, t2), t3) + eps) { + CCTK_WARN (0, "Internal error: extrapolation in time"); + } + + RT const s1fac = (t - t2) * (t - t3) / ((t1 - t2) * (t1 - t3)); + RT const s2fac = (t - t1) * (t - t3) / ((t2 - t1) * (t2 - t3)); + RT const s3fac = (t - t1) * (t - t2) / ((t3 - t1) * (t3 - t2)); + + + + // 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)] + + s3fac * src3 [SRCIND3(i, j, k)]; + + } + } + } + + } + + + + template + void + interpolate_3d_3tl (CCTK_REAL const * restrict const src1, + CCTK_REAL const t1, + CCTK_REAL const * restrict const src2, + CCTK_REAL const t2, + CCTK_REAL const * restrict const src3, + CCTK_REAL const t3, + 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_3tl (CCTK_COMPLEX const * restrict const src1, + CCTK_REAL const t1, + CCTK_COMPLEX const * restrict const src2, + CCTK_REAL const t2, + CCTK_COMPLEX const * restrict const src3, + CCTK_REAL const t3, + 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 |