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python_precision_problem
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1683 Commits

Author SHA1 Message Date
Don Cross
16aa0b3313 Python: Finished first pass of porting functions. 
The next step is to write all the unit tests.
 2019-06-29 20:30:52 -04:00
Don Cross
a80e63b85f Python work in progress: SearchRiseSet 2019-06-29 19:43:25 -04:00
Don Cross
2b7fcc81a3 Removed 'iter' field from JS class HourAngleEvent. 2019-06-29 18:57:13 -04:00
Don Cross
f36d91024d Python work in progress: SearchHourAngle. 2019-06-29 16:52:00 -04:00
Don Cross
b82f4af407 Python work in progress: SearchMoonQuarter, NextMoonQuarter. 2019-06-29 16:25:39 -04:00
Don Cross
c864dab19d Python work in progress: SearchPeakMagnitude. 2019-06-29 16:05:59 -04:00
Don Cross
2aa487aa6d Python: work in progress - magnitude functions. 2019-06-29 15:28:41 -04:00
Don Cross
52d77e34ed Python: more work in progress, translating functions. 
Also fixed incorrect comment in C code.
 2019-06-29 14:31:37 -04:00
Don Cross
90e526b75f Python: more work in progress, translating functions. 2019-06-29 14:12:57 -04:00
Don Cross
ba06afd817 Python work in progress: translating more functions. 2019-06-29 08:06:49 -04:00
Don Cross
9df032d1ce Python: added to-do list comments of functions to be implemented. 2019-06-28 20:55:03 -04:00
Don Cross
0c824bcf1b Major performance improvement for C library: re-use Earth tilt calculations. 
Just like I did in the Python version, avoid repeated calculations
of the Earth's tilt angles for a given time. Do this by caching
the angles in the astro_time_t structure. This requires passing in
the time values by address instead of by value. I may go back and
change all the time parameters to pointers for consistency.
 2019-06-27 21:47:30 -04:00
Don Cross
dfb888efb9 Measure time required by JS and C astro_check. 2019-06-27 15:27:01 -04:00
Don Cross
8615a2548a Huge performance boost to Python code: re-use e_tilt calculations. 
Calculate _e_tilt() no more than once per Time instance.
Cache the value in the Time instance and re-use it.
This reduced astro_check time from 5.0 minutes to 2.0 minutes.
 2019-06-27 14:54:49 -04:00
Don Cross
f2478fa29d Improved performance in C and JS code by getting rid of ter2cel() function. 
I already did this in the Python code to significantly reduce the number
of calls to e_tilt(). Did the same thing here: call sidereal_time() once,
then use the value 3 times.
 2019-06-27 14:35:46 -04:00
Don Cross
c611b50d3f Significant performance boost to Python code: eliminate _ter2cel(). 
There were 3 calls to _ter2cel(), each of which redundantly
called _sidereal_time, which results in 3 calculations of _e_tilt().
Reworked so there is only one call to _e_tilt().

Minor changes to support using cProfile, which is how I found this.
 2019-06-27 14:22:59 -04:00
Don Cross
f85025da31 Implemented astro_check in Python. Exercises major parts of the code. 
There is still a slight discrepancy in calculations of altitude,azimuth
that is larger than between JS and C.
 2019-06-26 21:12:27 -04:00
Don Cross
6d0ee59c1f Python: starting to implement astro_check. 2019-06-26 19:12:59 -04:00
Don Cross
221ea1130a Implemented Python Search function. Slight tweaks to C and JS versions. 2019-06-26 17:36:29 -04:00
Don Cross
f3efb29846 Python: Implemented quadratic interpolation, to be used by Search. 2019-06-26 17:06:14 -04:00
Don Cross
5802739e66 Python: implemented function GeoVector. 2019-06-26 07:28:51 -04:00
Don Cross
d2346051e3 Python: Implemented HelioVector function. 2019-06-26 06:05:24 -04:00
Don Cross
03c1bf3c8b Python: Implemented VSOP and Chebyshev calculations. 2019-06-26 05:51:55 -04:00
Don Cross
07ba91ed65 Use same code generator for JavaScript and Python: Chebyshev Pluto model. 2019-06-26 05:25:09 -04:00
Don Cross
027a6af007 Adapted JS vsop code generator to work with Python code too. 
Now the Python code and the JavaScript code for VSOP models
are generated by codegen.c using the same $ASTRO_LIST_VSOP macro.
Python functions for calculating from VSOP are not yet implemented.
 2019-06-25 21:28:20 -04:00
Don Cross
49e505e654 Verified GeoMoon C and Python versions are consistent for a single test case. 
This is a good indicator that the Python translation of CalcMoon is correct.
 2019-06-24 15:47:17 -04:00
Don Cross
787812287c Python: calling GeoMoon() without errors, but calculations not yet validated. 2019-06-24 15:25:28 -04:00
Don Cross
44b9d26d1d Python: CalcMoon work in progress. First pass is finished. Not yet tested. 2019-06-24 14:48:08 -04:00
Don Cross
79df146194 More Python CalcMoon work in progress. 
Also made minor optimizations to spin() function in both JS and C.
Fixed a mistake in JS and C that does not appear to have any
algorithmic consequences, but it was definitely confusing once I saw it.
 2019-06-24 14:08:38 -04:00
Don Cross
e47602f46b Python: translation in progress. 2019-06-23 21:28:45 -04:00
Don Cross
b5ebc4a645 Added python unit test. 2019-06-23 19:52:16 -04:00
Don Cross
7f0a369027 Python: reworked names and made Time more object-oriented. 2019-06-23 19:46:28 -04:00
Don Cross
a76b069ccc Python: added astro_time_t.Utc(). Added more testing. 2019-06-23 17:50:13 -04:00
Don Cross
8a344d251d Python: more work on date/time and formatting of same. 2019-06-23 17:36:33 -04:00
Don Cross
35017483cb Fixed problem in Python MakeTime() function.y 2019-06-23 17:10:58 -04:00
Don Cross
2a97849af2 Python: Implemented AddDays function. 2019-06-22 21:35:48 -04:00
Don Cross
f29d44aa43 Python: Implemented MakeTime function. 2019-06-22 21:33:48 -04:00
Don Cross
66b0efda5a Python: CurrentTime() working. 2019-06-22 21:24:56 -04:00
Don Cross
e37d7e90f0 Trim trailing whitespace from python code. 2019-06-22 21:15:54 -04:00
Don Cross
00dad8be32 Starting to add Python support in source translator. 2019-06-22 21:12:14 -04:00
Don Cross
5e755fe894 Fixed warnings found by lgtm. 2019-06-16 13:47:10 -04:00
Don Cross
e9a6c036ab Added comments to a couple of static functions. 2019-06-15 20:38:49 -04:00
Don Cross
d476465b6d Actually test moonphase.js and moonphase.c. Test after generating code. 2019-06-13 21:38:27 -04:00
Don Cross
58fa90a0bf Reworked tests of C examples. 
Moved test files into separate test directory (cleaner).
Make C and nodejs 'position' tests generate identical output.
 2019-06-13 21:04:45 -04:00
Don Cross
4061aa6b58 Added nodejs example 'positions.js'. 
Unit test the calculations and fail if output deviates.
 2019-06-13 20:37:43 -04:00
Don Cross
fb09678d4f Verify that demo C programs build. Validate positions.c output. 
I could also validate moonphase.c output if only I modified it
to accept an optional date and time parameter.
 2019-06-11 21:05:44 -04:00
Don Cross
92241cb1e7 Documented C functions Astronomy_SearchLunarApsis and Astronomy_NextLunarApsis. 2019-06-09 11:58:47 -04:00
Don Cross
dd2f6fb7b1 Added documentation for C function Astronomy_SearchPeakMagnitude. 2019-06-08 21:48:53 -04:00
Don Cross
a9f29f1c52 Added documentation for C function Astronomy_SearchRiseSet. 
Added more parameter checking for C and JS versions of that function.
 2019-06-08 21:11:39 -04:00
Don Cross
435c1e1533 Added documentation for C function Astronomy_SearchHourAngle. 
Also added extra parameter checking in C and JS versions of this function.
 2019-06-08 19:57:31 -04:00