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Point2Mesh Reimplementation

This is a reimplementation of Point2Mesh: A Self-Prior for Deformable Meshes by Rana Hanocka, Gal Metzer, Raja Giryes and Daniel Cohen-Or. It was written by David Charatan, Solon James and Grace Deng as a final project for CSCI 1470: Deep Learning at Brown University. The authors' original implementation (in PyTorch) can be found here. Watch a short video we made about the project here.

Running the Code

Several example point clouds can be found in the data folder. To fit to a point cloud, do the following:

python3 -m source.script_modules.train_model data/point_clouds/elephant_settings.json

Replace elephant_settings.json with a JSON settings file of your choice. For more information about valid JSON settings files, see options.py.

Notes About this Implementation

This implementation runs slower than the original implementation and doesn't include the PartMesh structure (splitting meshes into parts so that larger meshes can be optimized). However, we tried to add lots of comments to the code to make this implementation easier to follow than the original.

Project Setup

Creating a Virtual Environment

To create a virtual environment, run python3 -m venv venv. Then, do source venv/bin/activate (or equivalent) and pip3 install -r requirements.txt to install the project's dependencies.

Manifold Software Dependency

The remeshing and simplification operations Point2Mesh depends on require this watertight manifold software. To install it, cd into the point2mesh-reimplementation folder and run the following:

git clone --recursive -j8 git://github.com/hjwdzh/Manifold
cd Manifold
mkdir build
cd build
cmake .. -DCMAKE_BUILD_TYPE=Release
make

Installing OpenEXR

OpenEXR, a dependency of TensorFlow Graphics, cannot be installed directly via pip. Instead, follow the steps below:

Windows

Download a precompiled wheel file from https://www.lfd.uci.edu/~gohlke/pythonlibs/, move it to the workspace folder, then run python -m pip install SomePackage-1.0-py2.py3-none-any.whl. Running pip3 install tensorflow-graphics should then work.

MacOS

brew install openexr
export CFLAGS="-I/Users/USERNAME/homebrew/include/OpenEXR -std=c++11"
export LDFLAGS="-L/Users/USERNAME/homebrew/lib"
pip3 install tensorflow-graphics

Ubuntu

sudo apt-get install python3-dev
sudo apt-get install libopenexr-dev
sudo apt-get install openexr
pip3 install tensorflow-graphics

Running Scripts

The scripts in script_modules can be run as Python modules. To run create_convex_hull.py, run the command python3 -m source.script_modules.create_convex_hull from the project's root directory. Several VS Code run configurations are included in .vscode/launch.json.

Running Unit Tests

To run the unit tests in VS Code, open the command menu (<kbd>⌘ Command</kbd> <kbd>⇧ Shift</kbd> <kbd>P</kbd> on MacOS) and run Python: Discover Tests and then Python: Run All Tests. I recommend discovering and running tests through Python Test Explorer for Visual Studio Code (littlefoxteam.vscode-python-test-adapter) if you add more tests, since it's hard to diagnose broken tests that aren't being discovered with the default test explorer.

GCP VM Creation Steps

Disclaimer: This is a bit hacky since GCP's setup precludes usage of the normal venv setup.

First, make a VM:

• Region: us-west1 (Oregon)
• Series: N1
• Machine type: n1-standard-4 (4 vCPU, 15 GB memory)
• Under CPU platform and GPU: Add one NVIDIA Tesla V100 GPU
• Scroll down and check Allow HTTP traffic and Allow HTTPS traffic
• Set the boot disk to Deep Learning on Linux and Intel® optimized Deep Learning Image: TensorFlow 2.3 m59 (with Intel® MKL-DNN/MKL and CUDA 110).

Now, SSH into the VM under Open in browser window. You might have to wait a few minutes before this is possible (before that, it might hang). Now, in the terminal:

• When it prompts you for driver installation when you first log in, say yes.

Now run the following commands:

git clone https://github.com/dcharatan/point2mesh-reimplementation.git
cd point2mesh-reimplementation

git clone --recursive -j8 git://github.com/hjwdzh/Manifold
cd Manifold
mkdir build
cd build
cmake .. -DCMAKE_BUILD_TYPE=Release
make

cd ~/point2mesh-reimplementation
pip3 install trimesh
rm -rf /opt/conda/lib/python3.7/site-packages/cloudpickle
pip3 install cloudpickle==1.4.0
sudo apt-get install libopenexr-dev
sudo apt-get install openexr
pip3 install tensorflow-graphics

Now you can run the training script via:

python3 -m source.script_modules.train_model

Retrieving OBJs from Google Cloud

mv results ~
zip -r temp.zip results

If using the browser-based SSH terminal, now click the cog (settings icon) and download temp.zip.

Acknowledgements

The files elephant.pwn, hand.pwn and sphere.pwn were taken from Alex Jacobson's mesh reconstruction project.