Bounce

Welcome! Bounce is a 3D physics engine for games.

Feel free to ask questions, give feedback and suggestions using the issue tracker.

License

Bounce is released under the zlib license. Please recognize this software in the product documentation if possible.

Building

Bounce uses premake for generating project files in a platform agnostic manner. premake is available at https://premake.github.io/.

• Put premake into bounce/.

Visual Studio 2017

• Ensure you have installed the Visual Studio 2015 libraries.
• Say { premake5 vs2017 } on a command line.
• Open build/vs2017/bounce.sln.
• Set testbed as the startup project.
• In the testbed debugging properties, set the Working Directory to ..\..\examples\testbed.
• Press F5 to run.

Linux

• On a clean Ubuntu 16.04 install these packages first:

• mesa-common-dev

• libgl1-mesa-dev

• libglu1-mesa-dev

x32

• Say { premake5 gmake } on a terminal.
• From build/gmake say { make config="debug_x32" }.
• Set the testbed directory as the working directory.
• Open testbed from /bin/x32/testbed/.

x64

• Say { premake5 gmake } on a terminal.
• From build/gmake say { make config="debug_x64" }.
• Set the testbed directory as the working directory.
• Open testbed from /bin/x64/testbed/.

Mac

I don't run Mac currently and therefore can't test the build system in this platform.

Documentation

• Quickstart Guide

Doxygen

• Grab Doxygen from http://www.doxygen.org.
• Say the following on the command line: doxygen doxyfile.
• Open doc/api/html/index.html.

User manual is a work in progress. Meanwhile, code comments and examples are the best way to learn how to use Bounce. For examples, you can use the project testbed. testbed is a collection of visual tests and examples that can support the development of the library. As you would imagine, this application is not part of the library.

Contributing

Please do not open pull requests with bugfixes or new features that require large changes. Open an issue first for discussion.

Dependencies

• Triangle

Below are the external dependencies for testbed. If you don't care about testbed, then you don't need these dependencies.

• GLFW
• GLAD
• imgui
• RapidJSON

Features

Common

• Efficient data structures with no use of STL
• Stack and small block allocators
• Built-in math library
• Tunable settings used across the entire library

Quickhull

• Robust 3D convex hull creation and simplification

Collision

• Dynamic tree broadphase
• Static tree "midphase"
• SAT
• GJK
• Spheres, capsules, convex hulls, triangle meshes
• Optimized pair management

Dynamics

• Rigid bodies
• Contact, friction, restitution
• Mouse, spring, sphere, cone, revolute joint types
• Quaternion constraints
• Joint motors, limits
• Constraint graphs
• Simulation islands and sleep management
• Linear time solver
• Stable shape stacking
• One-shot contact manifolds
• Contact clustering, reduction, and persistence
• Contact callbacks: begin, pre-solve, post-solve
• Ray-casting and volume queries

Rope

• Rope
• Linear time solver

Cloth

• Cloth
• Vertex contact, friction
• Strech, shear, spring, mouse force types
• Linear time solver
• Unconditional simulation stability
• Ray-casting

Soft Body

• Soft body
• Vertex contact, friction
• Elasticity, plasticity
• Linear time solver
• Unconditional simulation stability
• Ray-casting

Testbed

• OpenGL with GLFW and GLAD
• UI by imgui
• Mouse picking
• premake build system

Documentation

• Doxygen API documentation