The rigid-body physics engine for the unfinished game 'KFighter'.

It's written from scratch in C++ but it may as well be in C since it uses so few of C++ features. It's currently Windows only but it's designed to be extended to other platforms in the future. I started it by following a tutorial by the brilliant Casey Muratori. The physics engine is based off talks done by Erin Catto of Box2D fame and works by iteratively solving a set of constraints.

• Collision detection and resolution
  • Rectangle collision
  • Friction
  • Collision islands (collections of objects typically connected by joints or other constraints that shouldn't collide with each other)
  • Multiple collision points
  • Stable stacking
• Joints
  • Angle constraints
  • Joint friction
  • PID controlled motors
• Loop live code editing
• Pose matching

• Arrow keys: Adjust gravity
• Space bar: Cycle poses
• Escape: Quit
• [,]: Increment/decrement random seed
• L: Cycle key recording; cycle between the following three actions: begin recording, end recording and begin playback, and end playback
• R: Reset game (keeping the seed the same)

• Windows 7 or later (only tested on Windows 10, may work on older versions).
• Visual Studio build tools 2015 or later (may work on earlier versions)

1. Download this repo as a zip (or clone it)
2. Run kfighter\build\win32_kfighter.exe

• kfighter\build - The directory for VC's output
• kfighter\code - The main code directory, all the compiled code is in here
• kfighter\media - Images for marketing
• kfighter\misc - Editor tools and config files
• kfighter\reference - Links to useful resources

• Windows 7 or later (only tested on Windows 10, may work on older versions).
• Visual Studio build tools 2015 or later (may work on earlier versions)

1. Download this repo as a zip (or clone it)
2. Open kfighter\code\build.bat in a text editor
3. Change the second line: pushd "C:\Program Files (x86)\Microsoft Visual Studio\2017\Community\VC\Auxiliary\Build\" to be inside the directory of your version of Visual Studio
4. cd kfighter\code
5. Run build.bat