The algorithm on identifying outline of the 2D graphics by comparing the angles
Jian Dong · Modern Machinery · 2003
This paper presents the algorithm on identifying the outline of the graphics by comparing angles. Firstly the initial node and edge are determined, from the node and edge, the associated edges is searched, and vectors of every edge in searching direction is calculated, the contour edge is decided by comparing the angles formed by the vectors of edges passed through the searching node and the reference vector, repeat this process until the contour edges are closed.