| 摘要 |
PURPOSE:To decrease the processing time by sorting preliminarily X and Y coordinates of a line segment so as to require the discrimination not necessarily to all line segments even if a point is designated. CONSTITUTION:An operation is applied to a content of a storage section 44 by a comparator 45 as the processing to be conducted prior to the input of points, and the result is stored in a storage section 46. Further, the stored content is divided into four, they are sorted by a sorting processing section 48 and the result is stored in a storage section 49. When a point is inputted, the point is compared with a content of the storage section 49 by the comparator 45 and the result is stored in a storage section 47. |
