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flut

GPU-based fluid simulation and rendering using OpenGL 4.6 compute shaders, DSA and bindless textures. Fluid behaviour is simulated using smoothed-particle hydrodynamics (SPH) as described by Müller et al. [1]. The GPU simulation pipeline roughly follows the work of Harada et al. [2]. After particle simulation, a screen-space rendering technique is performed to suggest a fluid-like continuous surface [3].

[1] Particle-Based Fluid Simulation for Interactive Applications, Müller et al. 2003
[2] Smoothed Particle Hydrodynamics on GPUs, Harada et al. 2007
[3] Screen Space Fluid Rendering with Curvature Flow, van der Laan et al. 2009

Simulation Pipeline Overview

overview

Build

This project uses CMake for generating buildsystem files and Git submodules for dependency tracking. Make sure you git clone with the --recursive flag or execute git submodule update --init --recursive after a non-recursive clone.
Then, invoke CMake for your buildsystem of choice and build the flut target.

Example:

mkdir -p build && cd build
cmake .. -G "Visual Studio 15 2017 Win64" -DCMAKE_BUILD_TYPE=Release
cmake --build . -j 8 --target flut --config Release && ./bin/flut

Future Improvements

  • Update README and pics to reflect new simulation pipeline
  • Better boundary handling with density contribution
  • Replace curvature flow with better visualization method
  • Implement surface tension forces

Acknowledgements

Special thanks to Sebastian Aaltonen for his detailed description of Claybook's SPH implementation.

License


    Copyright (C) 2020 Pablo Delgado Krämer

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program. If not, see <https://www.gnu.org/licenses/>.