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             : 
       8             : #include "Utilities/ConstantExpressions.hpp"
       9             : 
      10             : /// \ingroup ComputationalDomainGroup
      11             : /// Returns the maximum number of neighbors an element can have in `dim`
      12             : /// dimensions.
      13             : ///
      14             : /// \note Assumes a maximum 2-to-1 refinement between two adjacent Elements.
      15           1 : constexpr size_t maximum_number_of_neighbors(const size_t dim) {
      16             :   switch (dim) {
      17             :     case 1:
      18             :       return 2;
      19             :     case 2:
      20             :       return 8;
      21             :     case 3:
      22             :       return 24;
      23             :     default:
      24             :       // need to throw because we cannot ERROR in constexpr
      25             :       throw "Invalid dim specified";
      26             :   };
      27             : }
      28             : 
      29             : /// \ingroup ComputationalDomainGroup
      30             : /// Returns the maximum number of neighbors in each direction an element can
      31             : /// have in `dim` dimensions.
      32             : ///
      33             : /// \note Assumes a maximum 2-to-1 refinement between two adjacent Elements.
      34           1 : constexpr size_t maximum_number_of_neighbors_per_direction(const size_t dim) {
      35             :   switch (dim) {
      36             :     case 0:
      37             :       return 0;
      38             :     default:
      39             :       return two_to_the(dim - 1);
      40             :   };
      41             : }