1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
Description of files in this directory
======================================
$Header$
This directory contains the main top-level files for thorn Exact.
There are subdirectories
include/ include files
(n.b. all the code for the stress-energy tensor lives here)
metrics/ individual 4-metrics for the various models
The files in this directory are as follows:
Startup.c
This is scheduled at STARTUP to register our slicing.
ParamCheck.c
This is scheduled at PARAMCHECK to do some basic consistency
checks on the parameters.
decode_pars.F77
This is scheduled at INITIAL to decode/copy our parameters
into protected grid scalars, for the benefit of the stress-energy
tensor code in "include/Scalar_CalcTmunu.inc". In particular,
this code decodes the keyword parameter exact_model into
the integer decoded_exact_model (which has one of the values
#defined in include/param_defs.inc ).
initialize.F77
This contains the subroutine Exact__initialize(), which is
top-level routine scheduled at INITIAL to set up an initial
slice. This basically just calls Exact__Bona_Masso_data()
at each grid point, discarding everything it computes other
than the 3-metric, the extrinsic curvature, and possibly
the conformal factor and its spatial derivatives.
gauge.F77
This contains code to set the lapse/shift from an exact solution
either on the initial slice, or at each time step of an evolution.
This works by calling Exact__Bona_Masso_data() at each grid
point, discarding everything it computes except the lapse and
the shift.
Bona_Masso_data.F77
This contains the subroutine Exact__Bona_Masso_data(),
which computes the ADM variables (3-metric, extrinsic curvature,
lapse, shift) and some of their spatial derivatives
(1st derivatives of the 3-metric and the lapse,
2nd derivatives of the conformal factor and the shift vector)
by calling Exact__metric() and finite differencing.
[using a hard-coded 1.0e-6 grid spacing :( ]
Note that despite the name and comments referring to the
Bona-Masso variables, this subroutine doesn't appear to
actually use the Bona-Masso variables (!).
boost.F77
This contains the subroutine Exact__metric(), which calls
Exact__metric_for_model() and then applies an optional
Lorentz boost to the resulting 4-metric and its inverse.
metric.F77
This contains the subroutine Exact__metric_for_model(); this
decodes the decoded_exact_model parameter and calls the appropriate
Exact__<model_name>_<coords>() subroutine to compute the 4-metric
and its inverse at a point. See the metrics/ subdirectory
for these computations for the various models.
boundary.F77
This is the top-level routine scheduled at POSTSTEP to
implement exact-solution boundary conditions.
blended_boundary.F77
xyz_blended_boundary.F77
These files implement the blended boundary conditions described
in "doc/slice_evolver.tex".
slice_initialize.F
slice_evolve.F
slice_data.F
linear_extrap_one_bndry.F
These routines are scheduled at INITIAL and EVOL to allow
the computing of exact data on arbitrary slices. See
"doc/slice_evolver.tex" for details.
|
