Recommended objective-c Math libraries for working with Quaternions Matrices Vectors etc

Question

I'm looking for a good Math library in objective-c that does your usual Matrix Vector and Quaternion tasks for use in conjunction with Core Animation. The library needs to be free for commercial use.

Thanks!

Answer 1

Current versions of iOS include the Accelerate Framework, which includes a large set of accelerated matrix math routines (BLAS, LAPACK, etc.)

Added: You can also use any C math libraries/routines you might have, as Objective C is a compatible superset of ANSI C.