soft2d-release

This is soft2d's official repository for the latest releases, user examples, and documentation. The user documentation is hosted here.

Introduction

Soft2D is a 2D multi-material continuum physics engine designed for real-time applications. With soft2d, users can simulate various materials such as fluids, sand, snow, and elastic bodies within their applications. Soft2D runs on GPU, and currently supports Vulkan and Metal backends.

Soft2D is distributed as shared library binary files and header files. These files are under the soft2d/ directory. Additionally, soft2d relies on the Taichi C-API library. The Taichi C-API library is located at dependencies/taichi_c_api/, which has the same directory structure as soft2d/.

Binary Compatibility

Here we list the ABI compatibility of soft2d binary files:

• Linux: x86-64 (Tested on Ubuntu 20.04 and Ubuntu 22.04)
• Windows: x86-64 (Tested on Windows 10 with Visual Studio 2022)
• macOS: arm64-m1 (Tested on Ventura)
• iOS: aarch64
• Android: arm64-v8a

User Examples

Under the examples/ directory, we provide a collection of user examples demonstrating the capabilities of soft2d. These examples can run on Linux and Windows with Vulkan installed. All examples have been tested on Ubuntu 20.04/22.04 and Windows 10 with Visual Studio 2022. Follow the steps below to build and run these examples.

Video-version of these examples can be found on Soft2D YouTube channel.

Project Cloning

• Use git-lfs to clone binary files correctly.
• Use git submodule to install the necessary third-party dependencies for the Vulkan renderer.

# git clone ...
# cd soft2d-release/
git lfs pull
git submodule update --init --recursive

Vulkan Installation

Please install Vulkan SDK from vulkan-sdk website, and make sure Vulkan-related environment variables (VULKAN_SDK) are properly configured.

Running the Examples

Linux and Windows users can use the following commands to build and run the examples:

Linux

• Clean the build directory: ./build_linux.sh --clean
• Run the minimal test (No GUI): ./build_linux.sh --test
• Run a specific example: ./build_linux.sh --example=<example_name>
  • For instance, to run examples/basic_shapes.cpp, please use the command ./build_linux.sh --example=basic_shapes
• Build all examples: ./build_linux.sh
  • All output executables will be stored under the build/ directory.

Windows

• Clean the build directory: .\build_windows.bat --clean
• Run the minimal test (No GUI): .\build_windows.bat --test
• Run a specific example: .\build_windows.bat --example=<example_name>
  • For instance, to run examples/basic_shapes.cpp, please use the command .\build_windows.bat --example=basic_shapes
• Build all examples: .\build_windows.bat
  • All output executables will be stored under the build/Release/ directory.