This is the implementation of my graduation thesis - Position Based Snow Simulation with Phase Change
The simulation of snow is widely used in various places. Most snow are naturally accompanying with abundant water resources. When the environmental temperature is near to the melting point, the existence of water will make the snow have drastic phase changes. This leads to different elastoplastic characteristics of snow and will further affect the formulation of snow shape.
In our research, we introduce a method based on Position Based Dynamics by using two different discretization methods, Discrete Element Method (DEM) and Smoothed Particle Hydrodynamics (SPH) to simulate the interaction of surrounding water and ice crystals in snow. By introducing stretch constraints to DEM particles which performs as the interlinks of snow particles, we successfully simulate the deformation effect. In addition, we address the problem of over-connected interlinks by controlling the number of connections with considering the homogeneous freezing effects of ice crystals in snow.
Our method is a fully GPU-based algorithm which addresses the complex implementation of phase-change problems. As a result, our method is able to perform various characteristics of snow including deformation, phase change, and the rigid-fluid interactions. Despite of the limitations caused by our choice of constraint and the uniform size of particles, our position-based solver is a stable and controllable solution for simulating the complex behaviors of snow-water interactions.
- CUDA 11.0+
- OpenGL 4.0+
- GLFW
- SOIL
- Partio
- for .bgeo export
- imgui (has been included in the
\includefolder)
Open SnowSimulation.sln and build it with Visual Studio 2019
(If there's lib missing while building, please refer to the prebuilt libs in \libs)
| Parameter | Value |
|---|---|
| Snow temperature | −10 (C◦) |
| Water temperature | 100 (C◦) |
| Snow heat conductivity | 2500 (W/mK) |
| Water heat conductivity | 600 (W/mK) |
| Number of water particles | 5888 |
| Number of snow particles | 147928 |
| Per frame time | |
|---|---|
| Min | 41.025 (ms) |
| Max | 73.729 (ms) |
| Avg. | 56.809 (ms) |
For more information, please reference to our paper (should be published in near future by the school)
Dropping water into snow block
https://www.youtube.com/watch?v=crHYuIADOQc
Test 2
https://www.youtube.com/watch?v=4AIvfJd8CYo
Newest (multiple snow drops)
Copyright 2021 Chen Yi
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