https://github.com/nohal/calc_pi_muparser
Calculator_pi MuParser Branch
https://github.com/nohal/calc_pi_muparser
Last synced: 3 months ago
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Calculator_pi MuParser Branch
- Host: GitHub
- URL: https://github.com/nohal/calc_pi_muparser
- Owner: nohal
- Created: 2014-06-29T00:15:29.000Z (almost 11 years ago)
- Default Branch: master
- Last Pushed: 2014-06-29T00:21:37.000Z (almost 11 years ago)
- Last Synced: 2025-01-21T06:43:27.828Z (4 months ago)
- Language: C++
- Size: 414 KB
- Stars: 0
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README
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README
Calculator Plugin for OpenCPN by SaltyPaws aka Walbert Schulpen
=======================================
This is a light weight yet powerful calculator plugin for OpenCPN. Would you like to know your hull speed? The plugin makes use of the MuParser database by Ingo Berg.
Key features are:
* Storing results in variables
* Shows historic calculations
* Full scientific functions
* Screen footprint can be optimised & minimised as required
Help
=========
Type help in the calculator to get these instructions.
Examples of expression that work in the calculator are: (comments are in brackets, some results depend on other example calculations):
=========
Hull speed:
LWL=48 (water line lenght in feet)
vhull=1.34*LWL^(1/2) (hull speed in knots)
Conversions:
ftm=0.3048 (feet to meters)
km_to_nm=0.539957 (Kilometers to nautical Mile)
ftm*LWL (waterline length in meters)
Distance to horizon
R=6378.1*1000 (Radius of the earth in m)
H=2.5 (Height of the eye above sea-level in m)
d = R * acos(R/(R + h)) (Distance to horizon in m)
ans*km_to_nm (Distance to horizon in nm)
Distance to lighthouse
H1=200 (height of lighthouse in m)
d1 = R*acos(R/(R + H1)) (Distance to horizon in m)
distance=d1+d (visibility range of lighthouse in m)
Operators:
+ - * / ^ (NB use ^(1/2) for square root)
% & | << >> = <> < > <= >= ||
! (Factorial)
Functions:
Abs, Exp, Sign, Sqrt, Log, Log10
Sin, Cos, Tan, ASin, ACos, Atan (default entry is in radians use e.g. sin(dtr*90) to calculate in degree)
Factorial
Variables:
Pi, e
Ans is the result of the previous calulation
dtr is the conversion factor from degrees to radians
you can define your own variables (e.g. myvariable=10/8*cos(dtr*90) or yourvariable=Ans)
clear removes results in the history, but leaves your defined variables in tact
User Interface - type these commands in the command window:
history - Toggle the history panel
showhelp - Show/Hide the Help button
showcalculate - Show/Hide the Calculate button
showhistory - Show/Hide the history toggle
help - show the help menu
Settings/Plugins/Preferences:
Show/Hide Calculate, Help and History toggle buttons
History Settings: max Results - History will be cleared after this many results have been stored to save memory. Max 30000.
Show history window: Show/Hide default state
Capture when hidden: disable capturing of history when history panel is hidden - this will save some memory
Log to opencpn: Enable/Disable logging of results to opencpn logfile.
Other:
Scientific notation supported
Error handling supported
Compiling
=========
You have to be able to compile OpenCPN itself - Get the info at http://opencpn.org/ocpn/developers_manual
* git clone https://github.com/SaltyPaws/Calc_pi_muparser.git
Build out of OpenCPN branch!
in folder calculator_pi
* mkdir build
* cd build
* cmake ..
* make
* sudo make install
Executables
=========
Compiled library files can be downloaded/uploaded here.
https://sourceforge.net/projects/opencpnplugins/
License
=======
The plugin is licensed under the terms of GPL v2 or, at your will, later.
The MuParser files are by Ingo Berg and is open source. For full licence, please see the muparser source files.