JPH05290158

PURPOSE:To provide the method deciding parallelism without using any subjective parameter, in consideration of the difficulty in setting an intersection permissible range as a criterion for deciding whether or not skeleton line vectors are parallel in skeleton line vector connection processing. CONSTITUTION:A point M to be processed as an object of reference line setting and a comparison point N are selected. Data on outline data AA', BB', CC', and DD' used to generate interruption points M and N are obtained. Mid-points S and T of the segments AD and BC are set and the length of the segment ST is found. The lengths of the segments AB and CD are found and compared with each other. The lengths of the shorter segments AB and ST are compared. When ST >= AB, it is decided that the cores M and N are parallel. The segment MN is regarded as the reference line of the point M to be processed. The intersection of the reference lines MN and KL which are thus obtained is regarded as a connection point.