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[Kent <question103867@xxxxxxxxxxxxxxxxxxxxx>]

Question #103867 on DOLFIN changed:
https://answers.launchpad.net/dolfin/+question/103867

Kent proposed the following answer:
> New question #103867 on DOLFIN:
> https://answers.launchpad.net/dolfin/+question/103867
>
> I have a mesh generator, written in C++, which I have now linked with
> dolfin, using the MeshEditor class to construct
> a mesh. This works, but I would like to be able to use it from python.
> I have tried to use SWIG to create a module, but I don't know how to tell
> it that my new class inherits Mesh.
>
> Here is a summary of my code... but maybe there is a better way to do
> this?
>
> Chris
>
> mymesh.i
> ========
>
>  %module mymesh
>  %{
>  /* Put header files here or function declarations like below */
> #include "mymesh.h"
>  %}
>
> /* mymesh.h */
> namespace dolfin{
>
>   class Mymesh : public Mesh
>   {
>   public:
>     Mymesh();
>   };
> }
>
> mymesh.cpp
> ==========
>
> #include "mymesh.h"
>
> #include <dolfin/mesh/MeshPartitioning.h>
> #include <dolfin/mesh/MeshEditor.h>
> #include <dolfin.h>
>
> using namespace dolfin;
> .....
> Mymesh::Mymesh() {
>  Mesheditor editor;
> ....
> }
>
>
> # swig -c++ -python mymesh.i
> mymesh.i:11: Warning(401): Nothing known about base class 'Mesh'. Ignored.
>
>

Hake gave a more comprehensive answer, but here is a short one, to
fix only this problem you need to include the path to Mesh on the command
line, i.e.,

swig -c++ -python -I/path/to/Mesh mymesh.i

You will also need to include dolfin during linking.

Kent


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