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#
# -- constants.py - generates cpp and tex code for pysical and mathematical constants for GLE
# uses scipy.constants for physical constants and boost::math::constants for numerical constants
#
import scipy as sp
import subprocess
import os
pc_wart = "pc_"
mc_wart = "mc_"
cpp_filename = "gle-constants.h"
tex_filename = "constants.tex"
gle_filename = "test_constants.gle"
# variable names in scipy.constants.
# add use of database value(key) if needed
scipy_physical_constants = [
"c",
"speed_of_light",
"mu_0",
"epsilon_0",
"h",
"Planck",
"hbar",
"G",
"gravitational_constant",
"g",
"e",
"elementary_charge",
"R",
"gas_constant",
"alpha",
"fine_structure",
"N_A",
"Avogadro",
"k",
"Boltzmann",
"sigma",
"Stefan_Boltzmann",
"Wien",
"Rydberg",
"m_e",
"electron_mass",
"m_p",
"proton_mass",
"m_n",
"neutron_mass",
"zero_Celsius"
]
boost_math_constants = [
"catalan",
"degree",
"e",
"e_pow_pi",
"euler",
"exp_minus_half",
"half",
"half_pi",
"half_root_two",
"ln_phi",
"one_div_two_pi",
"half_root_two",
"phi",
"pi",
"quarter_pi",
"radian",
"root_e",
"root_half_pi",
"root_ln_four",
"root_pi",
"root_three",
"root_two",
"root_two_pi",
"third",
"third_pi",
"two_pi",
"two_thirds",
"zeta_three",
"zeta_two"
]
#
# -- generate .cpp file
#
file = []
file.append('//')
file.append('// -- gle-constants.h')
file.append('//')
file.append('// automatically generated from scripts/constants.py')
file.append('// re-run manually and copy file to src/gle to modify')
file.append('// uses boost::math for numerical constants')
file.append('// uses scipy.constants for physical constants')
file.append(f'// mathematical constants start with {mc_wart}')
file.append(f'// physical constants start with {pc_wart}')
file.append('//')
file.append('// gle variables are case in-sensitive')
file.append('//')
file.append('#include <boost/math/constants/constants.hpp>');
file.append('//')
file.append('void gle_set_math_and_physical_constants(bool numerical=true,bool physical=true)')
file.append("{")
tb="\t"
file.append(tb+'// option to omit inclusion of types if desired -- possible future GLE option')
file.append(tb+"if(numerical){")
tb="\t\t"
for c in boost_math_constants:
#print(f"{c} {eval(f"sp.constants.{c}")}")
s = f"{mc_wart}{c}"
file.append(f"{tb}var_findadd_set(\"{s.upper()}\",boost::math::double_constants::{c});")
tb="\t"
file.append(tb+"}")
file.append(tb+"if(physical){")
tb="\t\t"
for c in scipy_physical_constants:
#print(f"{c} {eval(f"sp.constants.{c}")}")
s = f"{pc_wart}{c}"
file.append(f"{tb}var_findadd_set(\"{s.upper()}\",{eval(f"sp.constants.{c}")});")
tb="\t"
file.append(tb+"}")
file.append("}")
with open(f'../src/gle/{cpp_filename}', 'w') as fp:
# Iterate over the list and write each item to the file
for line in file:
fp.write(line + '\n')
#
# -- generate .tex file for documentation
#
file = []
file.append('\\begin{tabular}{ll} \\hline')
file.append('Mathematical Constants & Value \\\\ \\hline')
file.append('{\\tt pi} \\index{pi} & 3.14159265358979323846 \\\\')
# read in boost/math/constants/constants.hpp and parse this file
# have environment variable set BOOSTDIR to point to top level boot folder
boost_dir = os.getenv('BOOSTDIR')
content = []
with open(os.path.join(boost_dir,'boost','math','constants','constants.hpp'), 'r') as fp:
content = fp.readlines()
lines = [line.strip() for line in content]
if content == None:
print("error opening boost constants file")
exit()
for c in boost_math_constants:
line = [string for string in content if f"BOOST_DEFINE_MATH_CONSTANT({c}" in string][0]
#print(line)
value=line.split(",")[1]
#print(f"{c} {value}")
name = f"{mc_wart}{c}"
name = name.replace("_","\\_")
file.append(f"{{\\tt {name}}} \\index{{{name}}} & {float(value):.16f} \\\\")
file.append('\\end{tabular}')
file.append('')
file.append('')
file.append('\\begin{tabular}{lll} \\hline')
file.append('Physical Constants & Value & Units \\\\ \\hline')
for c in scipy_physical_constants:
#print(f"{c} {eval(f"sp.constants.{c}")}")
name = f"{pc_wart}{c}"
name = name.replace("_","\\_")
units = "SI"
file.append(f"{{\\tt {name}}} \\index{{{name}}} & {eval(f"sp.constants.{c}")} & {units} \\\\")
file.append('\\end{tabular}')
with open(f'../../gle-manual/appendix/{tex_filename}', 'w') as fp:
# Iterate over the list and write each item to the file
for line in file:
fp.write(line + '\n')
#
# -- generate gle file for testing
#
file = []
file.append('!')
file.append('! -- testing of constants')
file.append(f"print \"pi = \" pi")
for c in boost_math_constants:
file.append(f"print \"{mc_wart}{c} = \" {mc_wart}{c}")
for c in scipy_physical_constants:
file.append(f"print \"{pc_wart}{c} = \" {pc_wart}{c}")
with open(f'../src/gletests/{gle_filename}', 'w') as fp:
# Iterate over the list and write each item to the file
for line in file:
fp.write(line + '\n')
# void gle_set_numerical_constants() {
# //
# // -- numerical (or mathematical) constants preceded with nc_ in GLE
# //
# // it is equivalent to the user adding the code
# // PI = 3.14159....
# // the GLE_PI constants are defined in all.h
# // var_findadd_set("PI", GLE_PI);
# // use boost::math::constants for best precisison
# // GLE varaibles are case insensitve so add as uppercase
# //
# var_findadd_set("NC_PI",boost::math::double_constants::pi);
# var_findadd_set("NC_TWO_PI",boost::math::double_constants::two_pi);
# var_findadd_set("NC_ROOT_PI",boost::math::double_constants::root_two);
# var_findadd_set("NC_HALF_PI",boost::math::double_constants::half_pi);
# var_findadd_set("NC_ROOT_TWO",boost::math::double_constants::root_two);
# var_findadd_set("NC_ROOT_THREE",boost::math::double_constants::root_three);
# var_findadd_set("NC_E",boost::math::double_constants::e);
# }
# void gle_set_physical_constants() {
# //
# // -- physical constants pc_ in GLE
# //
# // GLE variables are case insensitve so add as uppercase
# // code autogenerated from scripts\constants.py and scipy.constants library
# //
# var_findadd_set("PI",boost::math::double_constants::pi);
# var_findadd_set("NC_PI",boost::math::double_constants::pi);
# var_findadd_set("NC_TWO_PI",boost::math::double_constants::two_pi);
# var_findadd_set("NC_ROOT_PI",boost::math::double_constants::root_two);
# var_findadd_set("NC_HALF_PI",boost::math::double_constants::half_pi);
# var_findadd_set("NC_ROOT_TWO",boost::math::double_constants::root_two);
# var_findadd_set("NC_ROOT_THREE",boost::math::double_constants::root_three);
# var_findadd_set("NC_E",boost::math::double_constants::e);
# }
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