LOGICAL ARITHMETIC SYSTEM USING INTERSECTING POINT TRACKING METHOD

摘要

PURPOSE:To attain both simplification and unification of data and its processing by separating a standard case and an exceptional case for the deciding way of the initial direction and the switching destination at an intersecting point and therefore sorting the intersecting points into four types for processing. CONSTITUTION:Both figure data to receive a logic operation and figure data obtained through an operation are stored in a figure data memory part 1. The figure data A and B are read out to a preprocessing part 2 from the part 1, and the boundary direction is inverted through a boundary direction inversion processing part 3. The figure data preprocessed at the part 3 is applied to an intersecting point calculating part 4 to calculate an intersecting point from the figure data. The calculated intersecting points are applied to a type deciding part 5 to decide the type of each intersecting point. Then a start point selection part 6 selects a start point out of unprocessed intersecting points, and a direction deciding part 7 selects the direction for each type of operation. An arithmetic processing part 8 tracks the intersecting point from the selected start point in accordance with the intersecting point type. Then the intersecting points are stored into four types and processed. Thus the data and its processing can be simplified and unified.