Vulkan fluid simulation

This is a simple 3D SPH fluid simulation written in C++ and Vulkan. All the simulation is done through compute shaders and all the data buffers are kept in the GPU.

Building

To build the project, you will need

• A compiler with C++20 support
• CMake
• Vulkan SDK

CMake will download almost all dependencies, except the Vulkan SDK which must be in the path.

Roadmap

• Simulation of 3D scenes with SPH.
• Implementation of WCSPH model with viscosity.
• Load object files in OBJ format.
• Object and boundary interaction using volume maps.
• Configurable scene using a JSON file.
• Improve volume map using higher order interpolation (e.g. with serendipity points).
• Discard internal points in volume map keeping only a sparse grid.
• Add inverted volume map to use it for outer boundaries.
• Implicit fluid models, namely IISPH and DFSPH.
• Rigid body dynamics of interactive boundary objects using XPDB.
• Add surface tension model and other viscosity methods.
• Load objects and scenes using glTF 2.
• Solid and viscoelastic fluid models for simulating things like mud and terrain.
• Record particle and object positions, and export to a file for being externally analyzed or rendered.

Credits and refences

Some other dependencies used in the project are

• Dear ImGui
• Vulkan bootstrap
• Vulkan Memory Allocator
• fmt
• glm

Some papers used in the implementation:

• D Koschier, J Bender, B Solenthaler, and M Teschner. 2019. SPH Techniques for the Physics Based Simulation of Fluids and Solids. (2019). [https://sph-tutorial.physics-simulation.org]
• J Bender, T Kugelstadt, M Weiler, and D Koschier. 2020. Implicit Frictional Boundary Handling for SPH. IEEE Trans. Visual. Comput. Graphics 26, 10 (October 2020), 2982–2993. [https://doi.org/10.1109/TVCG.2020.3004245]
• J.A. Baerentzen and H. Aanaes. 2005. Signed Distance Computation Using the Angle Weighted Pseudonormal. IEEE Trans. Visual. Comput. Graphics 11, 3 (May 2005), 243–253. [https://doi.org/10.1109/TVCG.2005.49]

Also a big thanks to Sebastien Lague's project SebLague/Fluid-Sim which served as the inital inspiration and base for the project and Jan Bender's InteractiveComputerGraphics/SPlisHSPlasH for being a great source for reference SPH algorithms.