How do I install nest2D

[hananf11]

I am trying to install nest2D with pip install nest2D but it doesn't work.

here is some of the output I get when trying to install

-- Found PythonInterp: C:/Users/hanan/AppData/Local/Programs/Python/Python36/python.exe (found version "3.6.8")
  -- Found PythonLibs: C:/Users/hanan/AppData/Local/Programs/Python/Python36/libs/Python36.lib
  -- pybind11 v2.4.dev4
  -- Looking for pthread.h
  -- Looking for pthread.h - not found
  -- Found Threads: TRUE
  CMake Error at C:/Program Files/CMake/share/cmake-3.17/Modules/FindPackageHandleStandardArgs.cmake:164 (message):
    Clipper library cannot be found.  Consider set CLIPPER_PATH environment
    variable (missing: CLIPPER_LIBRARIES)
  Call Stack (most recent call first):
    C:/Program Files/CMake/share/cmake-3.17/Modules/FindPackageHandleStandardArgs.cmake:445 (_FPHSA_FAILURE_MESSAGE)
    lib/libnest2d/cmake_modules/FindClipper.cmake:67 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
    lib/libnest2d/cmake_modules/RequirePackage.cmake:252 (find_package)
    lib/libnest2d/include/libnest2d/backends/clipper/CMakeLists.txt:3 (require_package)

I have installed clipper with cmake . and cmake --build . --target install

I have tried setting the environment variable CLIPPER_PATH with set CLIPPER_PATH=C:/Program Files (x86)/polyclipping but it still doesn't work

I am using windows and Visual Studio Build tools 2019

[EthanRosenthal]

I had some luck adding '-DRP_ENABLE_DOWNLOADING=on' to this line of the setup.py file:

        cmake_args = ['-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=' + extdir,
                      '-DPYTHON_EXECUTABLE=' + sys.executable,
                      '-DRP_ENABLE_DOWNLOADING=on']

and installing the package from source via pip install -e .. That flag makes the underlying libnest2d library install any missing C dependencies (see here). BTW I did this on a Mac.

[rluqueb]

@EthanRosenthal answer worked for me in Ubuntu 18.04 and Python3. Running the simple_sample.py successfully generated the out.svg file. Thank you a lot!