Description: 1, understand the principles of polygon clipping (Weiler-Atherton algorithm, Sutherland-Hodgeman buildings algorithm). 2, to achieve these two polygon clipping algorithm, on the screen with a closed arbitrary polygon clipping rectangle (concave polygon convex polygon should experiment). 3, the preparation of the above algorithm program, which runs in the work area and display algorithm results. 4. Add the polygon clipping module to which the graphics test system design. 5, complete coding, debugging.
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