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Scan-line polygon fill the region to achieve the orderly side of the table algorithm, and the algorithm is applied to achieve an arbitrary polygon fill, polygon vertices keyboard input or mouse can be picked up, filling must be accurate, no more and no less fill to fill. Required to master the regional scan-line polygon filling algorithm for the orderly side of the table the basic principle and algorithm design, draw algorithm flow chart of procedures for the use of C or VC++ algorithm, and demonstrate.