Fluid Simulator (Rewrite WIP)

A Position Based Fluids/Particles simulator focused on CPU/CUDA parity, high-performance CUDA kernels, and a simple visualization path.

Goals

• CPU and CUDA parity for the PBF/PBD solver.
• High-performance CUDA implementation for large particle counts.
• Simple visualization (headless outputs or on-the-fly viewer).

Status

• Rewrite in progress; minimal build/run docs are below.
• See CODEX.md for rewrite guidance and parity expectations.

Build

Single build (CPU + optional CUDA backend):

1. cmake -S . -B build -DBUILD_CUDA=ON -DCMAKE_CUDA_ARCHITECTURES=89
2. cmake --build build -j

If you do not have CUDA, omit -DBUILD_CUDA=ON and CMAKE_CUDA_ARCHITECTURES.

Run (CPU): ./build/fluidsim --backend=cpu Run (CUDA): ./build/fluidsim --backend=cuda (requires CUDA build)

Legacy

• The previous implementation (CS 284A Spring 2020 final project) moved to the legacy branch, see also: legacy README.