Initial commit

libs/math/tools/spherical_harmonic_data.cpp

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+//  (C) Copyright John Maddock 2007.
+//  Use, modification and distribution are subject to the
+//  Boost Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/math/special_functions/spherical_harmonic.hpp>
+#include <fstream>
+#include <boost/math/tools/test_data.hpp>
+#include <boost/random.hpp>
+#include "mp_t.hpp"
+
+using namespace boost::math::tools;
+using namespace boost::math;
+using namespace std;
+
+float extern_val;
+// confuse the compilers optimiser, and force a truncation to float precision:
+float truncate_to_float(float const * pf)
+{
+   extern_val = *pf;
+   return *pf;
+}
+
+
+
+template<class T>
+boost::math::tuple<T, T, T, T, T, T> spherical_harmonic_data(T i)
+{
+   static boost::mt19937 r;
+
+   int n = real_cast<int>(floor(i));
+   boost::uniform_int<> ui(0, (std::min)(n, 40));
+   int m = ui(r);
+   
+   boost::uniform_real<float> ur(-2*constants::pi<float>(), 2*constants::pi<float>());
+   float _theta = ur(r);
+   float _phi = ur(r);
+   T theta = truncate_to_float(&_theta);
+   T phi = truncate_to_float(&_phi);
+
+   T r1 = spherical_harmonic_r(n, m, theta, phi);
+   T r2 = spherical_harmonic_i(n, m, theta, phi);
+   return boost::math::make_tuple(n, m, theta, phi, r1, r2);
+}
+
+int main(int argc, char*argv [])
+{
+   using namespace boost::math::tools;
+
+   parameter_info<mp_t> arg1, arg2, arg3;
+   test_data<mp_t> data;
+
+   bool cont;
+   std::string line;
+
+   if(argc < 1)
+      return 1;
+
+   do{
+      if(0 == get_user_parameter_info(arg1, "n"))
+         return 1;
+      arg1.type |= dummy_param;
+      arg2.type |= dummy_param;
+      arg3 = arg2;
+
+      data.insert(&spherical_harmonic_data<mp_t>, arg1);
+
+      std::cout << "Any more data [y/n]?";
+      std::getline(std::cin, line);
+      boost::algorithm::trim(line);
+      cont = (line == "y");
+   }while(cont);
+
+   std::cout << "Enter name of test data file [default=spherical_harmonic.ipp]";
+   std::getline(std::cin, line);
+   boost::algorithm::trim(line);
+   if(line == "")
+      line = "spherical_harmonic.ipp";
+   std::ofstream ofs(line.c_str());
+   line.erase(line.find('.'));
+   ofs << std::scientific << std::setprecision(40);
+   write_code(ofs, data, line.c_str());
+
+   return 0;
+}
+