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
86
87
88
89
90
91
92
93
94
95
|
// $Id: ConstantSetWrapper.hh,v 1.2 2002/10/04 13:44:00 flaterco Exp $
/* ConstantSetWrapper
Copyright (C) 1998 David Flater.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
class ConstantSetWrapper {
public:
ConstantSetWrapper (ConstituentSet *in_constituents,
ConstantSet *in_constants);
~ConstantSetWrapper();
// This will never have a value of type KnotsSquared.
// This changes if offsets change.
Amplitude maxAmplitude;
void setSimpleOffsets (SimpleOffsets in_offsets);
void setUnits (PredictionValue::Unit in_units);
// This is the back end to the tide prediction functions that will be
// finished out in class Station. predictHeight does not have the
// datum added in and will not be converted from KnotsSquared.
// predictHeight wraps time2dt_tide.
// movingMean is like predictHeight but it only does long-term constituents.
PredictionValue predictHeight (Timestamp in_timestamp, unsigned deriv);
PredictionValue movingMean (Timestamp in_timestamp);
PredictionValue datum() const;
/* dt_tide_max (int n)
* Returns the maximum that the absolute value of the nth derivative
* of the tide can ever attain.
*/
Amplitude dt_tide_max (unsigned deriv);
// Tell me what units predictHeight will return.
PredictionValue::Unit predictUnits ();
protected:
#define TIDE_MAX_DERIV (2) /* Maximum derivative supported by
* time2dt_tide() and family. */
ConstituentSet *constituents; // Node facs, eq. args.
ConstantSet *origConstants; // Already adjusted for meridian.
ConstantSet adjConstants; // origConstants with offsets and unit
// conversions applied.
ConstantSet yearConstants; // adjConstants with node factors and
// eq. args. applied
// Updates adjConstants, maxAmplitude, and maxdt, then calls
// refresh_yearConstants().
void refresh_adjConstants_yearConstants ();
// Updates yearConstants, amplitudes, phases, epoch, and next_epoch.
void refresh_yearConstants ();
Amplitude origMaxAmplitude;
// Behold, shameless hand-optimization of the innermost loop. These
// vectors are "pre-fetched" from yearConstants and constituents and
// are updated as needed in refresh_yearConstants.
unsigned length;
double *speeds; // in radians per second.
double *amplitudes; // in myUnits.
double *phases; // in radians.
// G. Dairiki code, slightly revised.
double _time2dt_tide (long t, unsigned deriv);
double blend_weight (double x, unsigned deriv);
double blend_tide (Timestamp in_timestamp, unsigned deriv, Year first_year,
double blend);
double time2dt_tide (Timestamp in_timestamp, unsigned deriv);
double time2mean (Timestamp in_timestamp);
// This is now initialized in the constructor.
Amplitude orig_maxdt[TIDE_MAX_DERIV+2];
Amplitude maxdt[TIDE_MAX_DERIV+2];
Year currentYear;
Timestamp epoch;
Timestamp next_epoch;
SimpleOffsets mySimpleOffsets;
PredictionValue::Unit myUnits; // Never KnotsSquared
};
|
