a37bc49882
This is something which I think every vector math library should have, as it clears up the convention for newcomers and saves them the trouble of figuring that out for themselves.
2.4 KiB
cgmath-rs
A linear algebra and mathematics library for computer graphics.
The library provides:
- vectors:
Vector2,Vector3,Vector4 - square matrices:
Matrix2,Matrix3,Matrix4 - a quaternion type:
Quaternion - rotation matrices:
Basis2,Basis3 - angle units:
Rad,Deg - points:
Point2,Point3 - perspective projections:
Perspective,PerspectiveFov,Ortho - spatial transformations:
AffineMatrix3,Transform3
Not all of the functionality has been implemented yet, and the existing code is not fully covered by the testsuite. If you encounter any mistakes or omissions please let me know by posting an issue, or even better: send me a pull request with a fix.
Conventions
cgmath interprets its vectors as column matrices (also known as "column vectors"), meaning when transforming a vector with a matrix, the matrix goes on the left. This is reflected in the fact that cgmath implements the multiplication operator for Matrix * Vector, but not Vector * Matrix.
Limitations
cgmath is not an n-dimensional library and is aimed at computer graphics applications rather than general linear algebra. It only offers the 2, 3, and 4 dimensional structures that are more than useful for most computer graphics applications. This design decision was made in order to simplify the implementation (Rust cannot paramerise over constants at compile time), and to make dimension-specific optimisations easier in the future.
Contributing
Pull requests are most welcome, especially in the realm of performance enhancements and fixing any mistakes I may have made along the way. Unit tests and benchmarks are also required, so help on that front would be most appreciated.
Support
Contact bjz on irc.mozilla.org #rust
and #rust-gamedev,
or post an issue on Github.