Globally Optimal Direction Fields (Felix Knöppel, Keenan Crane, Ulrich Pinkall, Peter Schröder), ACM Transcations on Graphics, 32(4), 2013. Abstract: We present a method for constructing smooth n-direction fields (line fields, cross fields, etc.) on surfaces that is an order of magnitude faster than state-of-the-art methods, while still producing fields of equal or better quality. Fields produced