# Which algorithm is applied for clipping arbitrary polygons?

## Which algorithm is applied for clipping arbitrary polygons?

The Greiner-Hormann algorithm is used in computer graphics for polygon clipping. It performs better than the Vatti clipping algorithm, but cannot handle degeneracies. It can process both self-intersecting and non-convex polygons.

**Which is the best polygon clipping algorithm?**

Weiler Atherton Polygon Clipping Algorithm is an algorithm made to allow clipping of even concave algorithms to be possible. Unlike Sutherland – Hodgman polygon clipping algorithm, this algorithm is able to clip concave polygons without leaving any residue behind.

**What are the various types of polygon clipping?**

Four Cases of polygon clipping against one edge

- Case 1 : Wholly inside visible region – save endpoint.
- Case 2 : Exit visible region – save the intersection.
- Case 3 : Wholly outside visible region – save nothing.
- Case 4 : Enter visible region – save intersection and endpoint.

### What is the name of the small integer which holds a bit for the result of every plane?

outcode

What is the name of the small integer which holds a bit for the result of every plane test? Explanation: A small integer holding a bit for the result of every plane test failed in clipping is termed as outcode.

**What is Sutherland Hodgman polygon clipping?**

It is performed by processing the boundary of polygon against each window corner or edge. First of all entire polygon is clipped against one edge, then resulting polygon is considered, then the polygon is considered against the second edge, so on for all four edges.

**Why is polygons clipping hard?**

Polygon clipping is particularly difficult because it is necessary that closed polygons remain closed. Clipping a polygon can result in several disjoint polygons. Typical algorithms include the Sutherland–Hodgman and the Weiler–Atherton clipping algorithms.

## What are the different types of clipping?

Types of Clipping:

- Point Clipping.
- Line Clipping.
- Area Clipping (Polygon)
- Curve Clipping.
- Text Clipping.
- Exterior Clipping.