oldrot_mod.f

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

Python version: oldrot_mod.py, 22 lines, on the right (switch to Python above the code).

Variables on this page (7)

eta2x, hgo, hio, hjx, json, r0x, wold

Purpose

OLDROT_MOD holds the rotation of the model at the start of the step, on the new point distribution, shared by 6 routines. It replaces COMMON/OLDROT/ (MHP via Claude, 10/14/26); JSON comes from DIMENSIONS_MOD. All members are arrays of JSON.

What its variables hold, who sets them, who reads them. HPOINT saves them after it has remapped the model ("store the old model structure for use in diffusion"):

WOLD: $\Omega$ at the start of the step (also set by STARIN). Read by WTIME (the largest fractional change of $\Omega$, for the time step), CHECKJ (whether a gradient was positive before), GETW (the start of the first substep) and HPOINT.
HJX ($J/M$, "MHP 10/91 J/M stored in HJX"), R0X, ETA2X (the rotational distortion terms): interpolated onto the new grid and copied back into HJM, R0, ETA2 by HPOINT itself.
HGO: gravity, read by MIDMOD (interpolated to mid-step).
HIO: the moment of inertia, saved by HPOINT (hpoint.f, line 816 ↗); read nowhere: unused?

Design

A blanket USE OLDROT_MOD.

Definitions

moduleOLDROT_MOD

lines 19–35 · GitHub

Uses modules DIMENSIONS_MOD

Used by (6 units)

CHECKJ, GETW, HPOINT, MIDMOD, STARIN, WTIME

Change log

The changes since rp_1

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

1C 2C 3C$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ 4C OLDROT_MOD 5C$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ 6C 10/14/26 MHP via Claude 7C code changed to convert COMMON/OLDROT/ into this module. 8C 9C Imported with a blanket USE, the convention for the conversion. 10C All 6 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 OLDROT_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 :: WOLD(JSON) 29 REAL*8 :: HJX(JSON) 30 REAL*8 :: HIO(JSON) 31 REAL*8 :: HGO(JSON) 32 REAL*8 :: R0X(JSON) 33 REAL*8 :: ETA2X(JSON) 34 35 END MODULE OLDROT_MOD

1"""Python version of oldrot_mod.f (YREC 7be4133): the rotation of the model 2at the start of the step, formerly COMMON/OLDROT/. 3 4Translates: oldrot_mod.f#OLDROT_MOD (7be4133) 5 6Routines that USE OLDROT_MOD import this module and write 7``oldrot_mod.<name>``. Saved by hpoint (wold also by starin). 8""" 9 10import numpy as np 11 12from pyrec import dimensions_mod 13 14_JSON = dimensions_mod.json 15 16# Fortran lines 28–33. 17wold = np.zeros(_JSON + 1) # Omega 18hjx = np.zeros(_JSON + 1) # J/M 19hio = np.zeros(_JSON + 1) # moment of inertia; read nowhere (unused?) 20hgo = np.zeros(_JSON + 1) # gravity (read by midmod) 21r0x = np.zeros(_JSON + 1) # distortion term r0 22eta2x = np.zeros(_JSON + 1) # distortion term eta2