Adding/loading new Finite element

General Discussion
1

Hi,
I am trying to implement a new finite Element. But I actually don’t get how to load this with the dynamical link. I already read the documentation a couple of times and I am using windows. The example load.edp works. Where or what do I need to change to be able to just load my new FE?
Thank you very much for help

2

first test if you are able to use the dynamic loading copy plugin/seq/myfunction2.cpp in other place in

mf3.cpp

try to compile with to build the dll
ff-c++ mf3.cpp
copy mf3.dll in the FreeFem++ directory may be need administrator privilege
cp examples/plugin/myfunction2.edp in mf3.edp
change load “myfunction2” in load “mf3”
and test the example

If it run, all you installation is OK for build you new finite element

add a the end of the source in 2D

  static TypeOfFE_TD_NNS0 Elm_TD_NNS;
  static AddNewFE FE__TD_NNS("TDNNS0", &Elm_TD_NNS);

or in 3d

 // add new FEs for DDM to build the partition of unity
  static TypeOfFE_P2Edge3ds0 Elm_P2Edge3ds0;
  // a static variable to add the finite element to freefem++
  static AddNewFE3 P2Edge3ds0("Edge23ds0", &Elm_P2Edge3ds0);
1 Like
3

Thank you very much.

It actually does ask for the administrator privilege to copy the dll file into the FreeFem++ directory. Is there any way I can still ad my custom FE to FreeFem++?

4

ON way is to copy all the freefem directory in place where you have right, and change you PATH to use this freefem.

5

Thank you so much! I really appreciate your help!

So now I got a new error while compiling from .cpp to .dll in Cygwin. It tells me:
/cygdrive/c/Program Files (x86)/FreeFem++/include/VirtualSolverSparseSuite.hpp:10:10: fatal error: umfpack.h: No such file or directory
10 | #include <umfpack.h>
| ^~~~~~~~~~~
compilation terminated.

What did I do wrong now?