quadru_mod.f

31 lines · 1 definitions · on GitHub (7be4133)

Python version: quadru_mod.py, 18 lines, on the right (switch to Python above the code).

Variables on this page (3)

gg, json, quad

Purpose

QUADRU_MOD holds the quadrupole moment of a rotating star's potential at each shell and the gravity it goes with. Shared by 3 routines. It replaces COMMON/QUADRU/ (MHP via Claude, 10/14/26); JSON comes from DIMENSIONS_MOD.

What its variables hold, who sets them, who reads them.

QUAD(JSON): the quadrupole moment, the solution U of GETQUA's tridiagonal system; GG(JSON): the local gravity HG that GETQUA used. Read by VCIRC (the factor RAT in QUADD_MOD) and, for QUAD(M) at the surface, by GETW, which prints it.

Design

A blanket USE QUADRU_MOD in each routine.

Definitions

moduleQUADRU_MOD

lines 19–31 · GitHub

Uses modules DIMENSIONS_MOD

Used by (3 units)

GETQUA, GETW, VCIRC

Change log

The changes since rp_1

Changed since rp_1. New file: COMMON/QUADRU/ as a module.

1C 2C 3C$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ 4C QUADRU_MOD 5C$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ 6C 10/14/26 MHP via Claude 7C code changed to convert COMMON/QUADRU/ into this module. 8C 9C Imported with a blanket USE, the convention for the conversion. 10C All 3 files declared this block identically, so the USE 11C imports exactly the names the declaration already made global in 12C each scoping unit and cannot change meaning. 13C 14C The types restate what the implicit rules supplied: L is 15C LOGICAL*4, I/J/K/M/N are INTEGER*4, everything else REAL*8. 16C SAVE is explicit rather than relying on module variables being 17C implicitly saved, which holds only from Fortran 2008 while ifort 18C Classic predates it. That matches COMMON's semantics. 19 MODULE QUADRU_MOD 20C 10/20/26 MHP via Claude 21C code changed to take JSON from DIMENSIONS_MOD instead of declaring 22C a PRIVATE copy here. 23 USE DIMENSIONS_MOD 24 25 IMPLICIT NONE 26 SAVE 27 28 REAL*8 :: QUAD(JSON) 29 REAL*8 :: GG(JSON) 30 31 END MODULE QUADRU_MOD

1"""Python version of quadru_mod.f (YREC 7be4133): the quadrupole moment 2of the potential and the gravity at each shell, formerly COMMON/QUADRU/. 3 4Translates: quadru_mod.f#QUADRU_MOD (7be4133) 5 6Module-level names, as in the Fortran module, in lower case. Routines that 7USE QUADRU_MOD import this module and write ``quadru_mod.<name>``. 8""" 9 10import numpy as np 11 12from pyrec import dimensions_mod 13 14_JSON = dimensions_mod.json 15 16# Fortran lines 28–29. 17quad = np.zeros(_JSON + 1) # quadrupole moment (getqua), index 0 unused 18gg = np.zeros(_JSON + 1) # local gravity used by getqua