A DLL which runs a Boids Swarm simulation on GPU using Libtorch, designed to work with Unreal Engine.

This is one of two repositories which are required to build this project:

• unreal-boids-swarm-plugin
• boids-swarm-dll - You are here.

• The actual Boids Algorithm is implemented in Pytorch
• It's implemented in 3d, with both goal targeting and avoidance
• The model has been JIT traced and can be run by LibTorch on GPU

• CMake
• Visual Studio
• LibTorch 1.7
• PyTorch 1.7 (Required Only to Re-Export Model)

• Clone this repo: git clone https://github.com/NeuralVFX/boids-swarm-dll.git
• Open the code directory
• Open boids.cpp and replace the "boids.ptc" path to match the path on your system (resides in the libtorch dir of this project)
• Open build/CMakeLists.txt and replace the path for Torch_DIR
• Run these commands to build the project(replace DCMAKE_PREFIX_PATH with your libtorch install directory):

cmake ./build -DCMAKE_PREFIX_PATH=C:\libtorch -DCMAKE_GENERATOR_PLATFORM=x64  ..
cmake --build . --config Release

• This should generate a Visual Studio Project and a file called Release/boids.dll
• Copy this file wherever you need!

• If you are interested to modify or re-export the Boids model, Run this Jupyter Notebook.