Handmade Math

A single-file, cross-platform, public domain game math library for both C and C++. Supports vectors, matrices, quaternions, and all the utilities you'd expect.

To get started, go download the latest release.

If you are upgrading to version 2 of Handmade Math, save yourself some time and use our automatic update tool.

Here's what sets Handmade Math apart:

• A simple single-header library. Just #include "HandmadeMath.h".
• Supports both C and C++. While libraries like GLM only support C++, Handmade Math supports both C and C++, with convenient overloads wherever possible. For example, C++ codebases get operator overloading, and C11 codebases get _Generic versions of common operations.
• Swizzling, sort of. Handmade Math's vector types use unions to provide several ways of accessing the same underlying data. For example, the components of an HMM_Vec3 can be accessed as XYZ, RGB, or UVW - or subsets can be accessed like .XY and .YZ.
• Your choice of angle unit. While Handmade Math uses radians by default, you can configure it to use degrees or turns instead.

Usage

Simply #include "HandmadeMath.h". All functions are static inline, so no need for an "implementation" file as with some other single-header libraries.

A few config options are available. See the header comment in the source for details.

FAQ

What's the license?

This library is in the public domain. You can do whatever you want with it.

Where can I contact you to ask questions?

Feel free to make Github issues for any questions, concerns, or problems you encounter.

What if I don't want the HMM_ prefix?

Do a find and replace in the library source.