How do I build PyOpenVDB with Numpy support?

[nbartzokas]

I successfully built pyopenvdb in docker. But I'm unable to use copyFromArray, getting the error NotImplementedError: this module was built without NumPy support.

How do I build PyOpenVDB with Numpy support?

Thanks! 🙏

[nbartzokas]

Ok I solved my own issue. (Isn't it always like 45 min after you post the question? 🤦‍♂️)

I used cmake -LA | grep -i numpy to find the USE_NUMPY cmake variable. Adding that along with the python module variable, -D OPENVDB_BUILD_PYTHON_MODULE=ON -D USE_NUMPY=ON built pyopenvdb with numpy support.

It might be helpful to add documentation about that variable in the build docs on openvdb.org

[jhnnsrs]

nice work! could you maybe share your Dockerfile,? I (and I guess a lot of others) are interested in the same setup!

[nbartzokas]

@jhnnsrs sure thing! There are some irrelevant install lines at the top you can ignore, but this is what worked for me. Hope this helps!

FROM  ubuntu:20.04

RUN apt-get update
RUN apt-get install -y wget 
RUN apt-get install -y ffmpeg
RUN apt-get install -y git
RUN apt-get install -y python3-pip
RUN apt-get install -y zlib1g-dev
RUN apt-get install -y libxmu-dev
RUN apt-get install -y libxi-dev
RUN apt-get install -y libxxf86vm-dev
RUN apt-get install -y libfontconfig1
RUN apt-get install -y libxrender1
RUN apt-get install -y libgl1-mesa-glx
RUN apt-get install -y libopenexr-dev 
RUN apt-get install -y bzip2 
RUN apt-get install -y build-essential 
RUN apt-get install -y xz-utils
RUN apt-get install -y libproj-dev proj-data proj-bin
RUN apt-get install -y libgeos++-dev libgeos-3.8.0 libgeos-c1v5 libgeos-dev libgeos-doc
RUN apt-get install -y libgdal-dev python3-gdal gdal-bin
RUN apt-get install -y libboost-iostreams-dev libboost-system-dev libtbb-dev
RUN apt-get install -y libvips libvips-tools

# install openvdb and requirements...

# install cmake 3.21.1
RUN bash -xc "pushd ~ && \
  wget https://github.com/Kitware/CMake/releases/download/v3.21.1/cmake-3.21.1.tar.gz && \
  tar -xf cmake-3.21.1.tar.gz && \
  cd cmake-3.21.1 && \
  bash ./configure && \
  make && \
  make install && \
  hash -r && \
  popd"

# install openvdb requirements
RUN bash -xc "pushd ~ && \
  git clone https://github.com/Blosc/c-blosc.git && \
  cd c-blosc && \
  git checkout tags/v1.5.0 -b v1.5.0 && \
  mkdir build && \
  cd build && \
  cmake .. && \
  make -j4 && \
  make install && \
  popd"

# install openvdb
RUN apt-get install -y libboost-python-dev \
  libboost-numpy-dev \
  python-dev \
  python-numpy \
  llvm-8-dev \
  zlibc \
  libilmbase-dev

RUN bash -xc "pushd ~ && \
  git clone https://github.com/AcademySoftwareFoundation/openvdb.git && \
  cd openvdb && \
  mkdir build && \
  cd build && \
  cmake -D OPENVDB_BUILD_PYTHON_MODULE=ON -D USE_NUMPY=ON .. && \
  make -j4 && \
  make install && \
  popd"

# pyopenvdb installs to the wrong place. for now symbolic link. later fix in cmake?
RUN ln -s /usr/local/lib/python3.8/pyopenvdb.so /usr/local/lib/python3.8/dist-packages/pyopenvdb.so

# install dependencies
RUN pip3 install pipenv
COPY Pipfile Pipfile.lock ./
RUN pipenv install --system --deploy

WORKDIR /

[jhnnsrs]

Great thanks! :) Very much appreciated!