Quaternion slerp may be expensive, but you can approximate the results almost imperceptibly with ‘nlerp’. Obligatory Jonathan Blow article: http://number-none.

Quaternion slerp may be expensive, but you can approximate the results almost imperceptibly with ‘nlerp’. Obligatory Jonathan Blow article: http://number-none.com/product/Understanding%20Slerp,%20Then%20Not%20Using%20It/ http://number-none.com/product/Understanding%20Slerp,%20Then...