What are the issues in polygon clipping?

Following are the issues in polygon clipping.

• Clipping a line segment produces only one line segment.
• Convex polygon clipping can only produce one polygon
• Concave polygon clipping can result in numerous polygons
• A number of output edges for the same input polygon may differ depending on its orientation and geographical location
• New edges may be required.
• The edge can be thrown away or separated.

Which algorithmic strategy is used in Sutherland-Hodgeman polygon clipping approach?

Sutherland-Hodgeman polygon clipping uses divide and conquer approach to clip the given polygon

State the advantages of generalized polygon clipping approach

Following are the advantages of generalized polygon clipping method

• This approach can easily handle concave polygons as well.
• It is not necessary to split the concave polygon in order to transform it to a convex polygon.
• It does not produce surious edges, unlike the Sutherland-Hodgeman method, hence no post processing is required.

Scholarly Article: Simple and efficient 2D and 3D span clipping algorithms. Click to read