[vtkusers] CMake custom class python wrapping doesn't work

[Jean-Christophe Fillion-Robin]

Hi Evgeniya,

Based on my understanding, wrapping of custom classes without (1) creating
an external VTK module or (2) using the VTK build system (like Paraview
does) is not supported.

If possible, I suggest you re-organize your code to create a VTK external
module. That you will be able to use the VTK CMake API by including the
vtkExternalmoduleMacros.
For example, see
https://github.com/Kitware/VTK/blob/master/Rendering/OpenVR/CMakeLists.txt
(while this module can be built both as a built-in module and an external
module, it illustrates the idea)



If not possible, you need to make sure the python hierarchy files are
generated.
Here is a module we maintain in Slicer that enable this. It provides a
macro named "vtkMacroKitPythonWrap"
See
https://github.com/Slicer/Slicer/blob/master/CMake/vtkMacroKitPythonWrap.cmake

Here is an example of usage:

 include(vtkMacroKitPythonWrap)

  vtkMacroKitPythonWrap(
    KIT_NAME vtkFoo
    KIT_SRCS ${vtkFoo_SRCS}
  )


Hth
Jc

On Mon, Oct 15, 2018 at 12:48 AM Evgeniya Malikova <evgenimalikova at gmail.com>
wrote:

> Hello.
> I have a common wrapping that previously worked on windows 8.1 with
> VTK 8.1.1.  As I had problems to compile vtk8 on Mac (don't remember
> all details of that) I switched to
> https://gitlab.kitware.com/vtk/vtk.git.
>
> With following settings compilation on Mac of custom class gives a
> strange error, referencing some hierarchy file:
>
> [ 85%] Built target vtkHF
>
> make[5]: *** No rule to make target
> `../../hf/pythonClasses/vtkHFHierarchy', needed by
> `hf/pythonClasses/vtkHFFunctionPython.cxx'.  Stop.
>
> make[4]: *** [hf/pythonClasses/CMakeFiles/vtkHFPythonD.dir/all] Error 2
>
> make[3]: *** [all] Error 2
>
> make[2]: *** [hfvisual-prefix/src/hfvisual-stamp/hfvisual-build] Error 2
>
> make[1]: *** [CMakeFiles/hfvisual.dir/all] Error 2
>
> make: *** [all] Error 2
>
> //-------------
>
> My CMakeLists:
>
>
> find_package(VTK REQUIRED
>                  vtkCommonCore
>                  vtkCommonDataModel
>                  vtkCommonExecutionModel
>                  vtkImagingHybrid
>                  vtkImagingCore
>                  vtkImagingStencil
>                  vtkImagingGeneral
>                  vtkFiltersCore
>                  vtkRenderingCore
>                  vtkWrappingPythonCore
>
>              )
>  include(${VTK_USE_FILE})
>
>  # Python and vtk wrapping
>   find_package(PythonInterp REQUIRED)
>   find_package(PythonLibs ${PYTHON_VERSION_STRING} EXACT REQUIRED)
>   set(CUSTOM_PYTHON_EXECUTABLE ${PYTHON_EXECUTABLE})
>  include(vtkWrapPython)
>  include_directories("${PYTHON_INCLUDE_PATH}")
>
>
>   set (OPENAL_INCLUDE_DIR ${INSTALL_DEPENDENCIES_DIR}/include/AL)
>
>   LINK_DIRECTORIES(${INSTALL_DEPENDENCIES_DIR}/lib/)
> set(CMAKE_MACOSX_RPATH 1)
>
> set (openAL OpenAL32)
>  if( APPLE )
>   set (openAL OpenAL)
> endif()
>
>   set (OPENAL_LIBRARY} ${INSTALL_DEPENDENCIES_DIR}/lib/${openAL})
>    set (ALUT_LIBRARY} ${INSTALL_DEPENDENCIES_DIR}/lib/alut)
>   include_directories(${OPENAL_INCLUDE_DIR})
>   include_directories(${INSTALL_DEPENDENCIES_DIR}/include)
>
>
>  #######################################
>  # Building vtkHFFunction
> list(APPEND libraries_list  cppinterpreter)
> ....
>
>  add_library(vtkHF SHARED ${WRAP_LIST})
>
>  # Build main library
>  TARGET_LINK_LIBRARIES(vtkHF ${VTK_LIBRARIES} alut ${openAL}
> ${libraries_list})
> if(APPLE)
>   set_target_properties(vtkHF PROPERTIES SUFFIX ".so")
> endif()
>
> set(vtkHFPython_EXCLUDE_FROM_WRAP_HIERARCHY 1)
> # Python wrapping
>
> include_directories("${PYTHON_INCLUDE_PATH}")
>
>
>  #include_directories(${PythonVTKLibs_SOURCE_DIR})
>  #######################################
>  # Wrapping
>
>  vtk_wrap_python3(vtkHFPython KitPython_SRCS "${WRAP_LIST}")
>  add_library(vtkHFPythonD ${KitPython_SRCS} ${WRAP_LIST} )
>
>
>  IF(KIT_PYTHON_DEPS)
>   ADD_DEPENDENCIES(vtkHFPythonD ${KIT_PYTHON_DEPS} ${VTK_PYTHON_LIBRARIES})
> ENDIF(KIT_PYTHON_DEPS)
>
> #Here happens error
>  python_add_module(vtkHFPython vtkHFPythonInit.cxx)
>
>
> What I do wrong?
> Thank you in advance,
> Best regards, Evgeniya
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