PositionBasedFluids

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PositionBasedFluids

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A position-based fluid simulation, rendering in screen-space with caustics and simple GUI. Cartoon-style rendering is also available.

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[简体中文](README_zh.md)

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# Features

- Real-time position-based fluid simulation 
- Real-time screen-space fluid rendering
- Real-time water caustics using photon mapping
- Real-time cartoon-style water and foam rendering
- Simple GUI based on ImGui
- Compute Shader-based workload distribution

# Real-time Position-Based Fluid Simulation

Implemented based on the paper *"Position based fluids"* by Miles Macklin and Matthias Müller.

Derivation process: [see here](https://zhuanlan.zhihu.com/p/31850164166)

![pbf_1](https://raw.githubusercontent.com/kuriishi/PositionBasedFluids/main/showcase/pbf_1.gif)

Fluid Simulation Showcase 1

![pbf_2](https://raw.githubusercontent.com/kuriishi/PositionBasedFluids/main/showcase/pbf_2.gif)

Fluid Simulation Showcase 2

# Real-time Screen-Space Fluid Rendering

Implemented based on the paper *"Screen space fluid rendering with curvature flow"* by W. J. van der Laan, S. Green, and M. Sainz.

Algorithm introduction: [see here](https://zhuanlan.zhihu.com/p/1896667370149352055)

![fluid_1](https://raw.githubusercontent.com/kuriishi/PositionBasedFluids/main/showcase/fluid_1.gif)

Fluid Rendering Showcase 1

![fluid_2](https://raw.githubusercontent.com/kuriishi/PositionBasedFluids/main/showcase/fluid_2.gif)

Fluid Rendering Showcase 2

# Real-Time Water Caustics Using Photon Mapping

Partially implemented based on the paper *"Interactive image-space techniques for approximating caustics"* by Chris Wyman and Scott Davis.

Algorithm introduction: [see here](https://zhuanlan.zhihu.com/p/1916917420641199169)

![caustics_1](https://raw.githubusercontent.com/kuriishi/PositionBasedFluids/main/showcase/caustics_1.gif)

Water Caustics Showcase 1

![caustics_2](https://raw.githubusercontent.com/kuriishi/PositionBasedFluids/main/showcase/caustics_2.gif)

Water Caustics Showcase 2

# Real-Time Cartoon-Style Water and Foam Rendering

Implemented based on Liordino dos S. Rocha Neto's papers *"Real-Time Screen Space Rendering of Cartoon Water"* and *"Cartoon Water Rendering with Foam and Surface Smoothing"*.

Algorithm introduction: [see here](https://zhuanlan.zhihu.com/p/1920252664308040967)

![cartoon_1](https://raw.githubusercontent.com/kuriishi/PositionBasedFluids/main/showcase/cartoon_1.gif)

Cartoon Water & Foam Showcase 1

![cartoon_2](https://raw.githubusercontent.com/kuriishi/PositionBasedFluids/main/showcase/cartoon_2.gif)

Cartoon Water & Foam Showcase 2

PositionBasedFluids

PositionBasedFluids Latest Version Download

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