This plugin is now included in the main OpenCPN source tree. The code archived here is not maintained anymore, please use https://github.com/OpenCPN/OpenCPN to get the latest code and file bugs.

World Magnetic Model Plugin for OpenCPN

Implements http://www.ngdc.noaa.gov/geomag/WMM/DoDWMM.shtml as a plugin for OpenCPN.

Compiling

You have to be able to compile OpenCPN itself - Get the info at http://opencpn.org/ocpn/developers_manual

• This plugin now builds out of the OpenCPN source tree

git clone git://github.com/nohal/wmm_pi.git

###Build:

mkdir wmm_pi/build
cd wmm_pi/build
cmake .. # To produce a binary compatible with Windows XP, you must set the respective toolset - use 'cmake -T v120_xp ..'
cmake --build .

###Build on Mac OS X: Tools: Can be installed either manually or from Homebrew (http://brew.sh)

#brew install git #If I remember well, it is already available on the system
brew install cmake
brew install gettext
ln -s /usr/local/Cellar/gettext/0.19.2/bin/msgmerge /usr/local/bin/msgmerge
ln -s /usr/local/Cellar/gettext/0.19.2/bin/msgfmt /usr/local/bin/msgfmt

To target older OS X versions than the one you are running, you need the respective SDKs installed. The easiest way to achieve that is using https://github.com/devernay/xcodelegacy

####Building wxWidgets (do not use wxmac from Homebrew, it is not compatible with OpenCPN) Get wxWidgets 3.0.x source from http://wxwidgets.org Configure, build and install

cd wxWidgets-3.0.2
./configure --enable-unicode --with-osx-cocoa --with-macosx-sdk=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.7.sdk/ --with-macosx-version-min=10.7 --enable-aui --disable-debug --enable-opengl
make
sudo make install

####Building the plugin Before running cmake, you must set the deployment target to OS X 10.7 to be compatible with the libraries used by core OpenCPN

export MACOSX_DEPLOYMENT_TARGET=10.7

####Packaging on OS X Get and install the Packages application from http://s.sudre.free.fr/Software/Packages/about.html

make create-pkg

License

The plugin code is licensed under the terms of the GPL v2 or, at your will, later. The WMM computational bits and data were put into the public domain by the U.S. govt. Many thanks for this sane policy...