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Geometric tables - Polygon Tables
1) Vertex table: Keep vertices' coordinates values in the object.
2) Edge table: Keep pointers back in to the vertex table for identification of the vertices related to all polygon edges.
3) Polygon table or polygon surface table: Keep pointers back in the edge table for consideration of the edges associated to the polygon surface under construction.
This tabular representation of a polygon surface is demonstrated in Figure. Such representations assist one to rapidly refer to the data associated to a polygon surface. Also, while the data is put for processing then the processing can be fairly efficient, leading to efficient display of the object under identification.
Distinguish between convex and concave polygons? If the line joining any two points in the polygon lies totally inside the polygon then, they are called as convex polygons. If
How does the Cyrus Beck line clipping algorithm, clip a line segment whether the window is non convex? Solution : see the following figure 13, now the window is non-convex in s
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