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It allows to export the c++ code to create a subsystem with the same information as the one solved using LM/DL/BGFS.
In this commit the functionality is disabled (for production).
To enable the functionality uncomment this line in planegcs/Constraints.h:
//#define _GCS_EXTRACT_SOLVER_SUBSYSTEM_
When enabled, upon solving with LM/DL/BGFS, the c++ code to generate the subsystem is added to a subsystem.txt that is created in the FreeCAD
execution directory.
Note that the file is created in append mode, so it will append all normal/redundant solvings until the file is deleted.
The resulting code can be directly pasted into a project similar to:
https://github.com/abdullahtahiriyo/Eigen_LUPiv_Convergence
Such a project only has libeigen as external dependency.
