Line data    Source code

       1            0 : // Distributed under the MIT License.
       2              : // See LICENSE.txt for details.
       3              : 
       4              : #pragma once
       5              : 
       6              : #include <cstddef>
       7              : #include <vector>
       8              : 
       9              : namespace ylm {
      10              : class Spherepack;
      11              : 
      12              : /// Retrieves a cached Spherepack object with m_max equal to l_max
      13            1 : const Spherepack& get_spherepack_cache(size_t l_max);
      14              : 
      15              : /*!
      16              :  * \brief SPHEREPACK spectral offsets grouped by angular degree \f$\ell\f$.
      17              :  *
      18              :  * \details `offsets` is a flat array of SPHEREPACK spectral offsets sorted
      19              :  * by angular degree. The offsets for degree \f$\ell\f$ occupy the half-open
      20              :  * range `[l_start[l], l_start[l+1])` within `offsets`.
      21              :  */
      22            1 : struct SphericalHarmonicModesByDegree {
      23              :   /// Flat list of SPHEREPACK spectral offsets, grouped by angular degree
      24            1 :   std::vector<size_t> offsets;
      25              :   /// Prefix-sum array of length \f$\ell_\mathrm{max}+2\f$; the offsets for
      26              :   /// degree \f$\ell\f$ are `offsets[l_start[l]..l_start[l+1])`
      27            1 :   std::vector<size_t> l_start;
      28              : };
      29              : 
      30              : /// Retrieves cached SPHEREPACK spectral offsets grouped by angular degree for
      31              : /// the given \p l_max.
      32            1 : const SphericalHarmonicModesByDegree& get_modes_by_degree_cache(size_t l_max);
      33              : }  // namespace ylm