Tracing along an intersection closed loop, when should one stop?

Wu Shin-Ting, O. Alessio
Proceedings XIV Brazilian Symposium on Computer Graphics and Image Processing  
In this paper we present an algorithm for estimating the rotation index of a closed loop from the number of singular points on it. On the basis of this index we also devise a procedure that guarantees to have an arbitrary loop being traced only once. Combining this procedure with a higher-order stepping algorithm, a robust intersection technique is resulted.
doi:10.1109/sibgrapi.2001.963031 dblp:conf/sibgrapi/WuA01 fatcat:qihacnzr3vbe5p4cbkcbiecoga