Question:
Which of the following clipping algorithms uses a region code system to classify line segments?
Which of the following clipping algorithms uses a region code system to classify line segments?
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Look for the method famous for 4-bit outcodes around the clip window.
Updated On: Jul 2, 2026
- Midpoint Subdivision Algorithm
- Cohen-Sutherland Algorithm
- Liang-Barsky Algorithm
- Weiler-Atherton Algorithm
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The Correct Option is B
Solution and Explanation
Step 1: The question asks for a line clipping method that assigns region codes to endpoints.
Step 2: The Cohen-Sutherland algorithm divides the plane around the clip window into nine regions and gives each a 4-bit outcode. Each bit flags whether a point is above, below, left, or right of the window.
Step 3: Using these codes, the algorithm quickly accepts or rejects lines by logical AND and OR tests on the endpoint codes.
Step 4: Liang-Barsky uses parametric tests, Weiler-Atherton clips polygons, and midpoint subdivision bisects lines. Only Cohen-Sutherland uses region codes.
Step 2: The Cohen-Sutherland algorithm divides the plane around the clip window into nine regions and gives each a 4-bit outcode. Each bit flags whether a point is above, below, left, or right of the window.
Step 3: Using these codes, the algorithm quickly accepts or rejects lines by logical AND and OR tests on the endpoint codes.
Step 4: Liang-Barsky uses parametric tests, Weiler-Atherton clips polygons, and midpoint subdivision bisects lines. Only Cohen-Sutherland uses region codes.
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