Can Cohen Sutherland be used for 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.

What is Cohen Sutherland line clipping?

The Cohen–Sutherland algorithm is a computer-graphics algorithm used for line clipping. The algorithm divides a two-dimensional space into 9 regions and then efficiently determines the lines and portions of lines that are visible in the central region of interest (the viewport).

How many polygons are used in Sutherland Hodgman clipping method?

How many polygons are used in this method? Explanation: Two polygons are used in this algorithm namely clip polygon and subject polygon.

Which polygons are correctly clipped by the Sutherland Hodgman algorithm?

Once all vertices have been processed for one clip window boundary, the output list of vertices is clipped against the next window boundary. Convex polygons are correctly clipped by the Sutherland-Hodgeman algorithm, but concave polygons may be displayed with extraneous lines, as demonstrated in Fig.

How do you solve Cohen Sutherland problem?

Clip a line A (-1,5) and B (3,8) using the Cohen Sutherland algorithm with window coordinates (-3,1) and (2,6). Here xmin =-3 and ymin=1 with xmax =1 and ymax=6 with x1=-1, y1=5 and x2=3, y2=8. – Bit 1 = Sign of (y-ymax) = Sign of (5-6) = Negative, so bit 1 would be 0.

Which is the first line-clipping algorithm?

Cohen Sutherland Line Clipping Algorithm
Cohen Sutherland Line Clipping Algorithm: In the algorithm, first of all, it is detected whether line lies inside the screen or it is outside the screen. All lines come under any one of the following categories: Visible.

Can you use line clipping algorithm for polygon clipping?

Line clipping against a polygon is widely used in computer graphics such as the hidden line problem. A new line-clipping algorithm against a general polygon is presented in this paper. Each edge of the polygon is processed against a horizontal line, which makes the clipping process simpler.

Why is polygon clipping difficult?

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 disadvantages of Sutherland hodgeman algorithm?

Disadvantages of sutherland hodgman polygon clipping algorithm

• It clips to each window boundary one at a time.
• It has a “Random” edge choice.
• It has Redundant edge-line cross calculations.

Which is line clipping algorithm?

In computer graphics, line clipping is the process of removing lines or portions of lines outside an area of interest. Typically, any line or part there of which is outside of the viewing area is removed. There are two common algorithms for line clipping: Cohen–Sutherland and Liang–Barsky.

What is the Sutherland Hodgeman polygon clipping algorithm?

In computer graphics, we have to study the Sutherland – Hodgeman polygon clipping algorithm. The algorithm according to the book by A. P. Godse is as follows: Step 4- Compare the vertices of each edge of the polygon , individually with clipping plane.

How is polygon clipping used in computer graphics?

Polygon clipping is a process in which we only consider the part which is inside the view pane or window. We will remove or clip the part that is outside the window. We will use the following algorithms for polygon clipping – Sutherland-Hodgeman polygon clipping algorithm

How is Sutherland Hodgman extended to 3D space?

Sutherland–Hodgman can also be extended into 3D space by clipping the polygon paths based on the boundaries of planes defined by the viewing space. Given a list of edges in a clip polygon, and a list of vertices in a subject polygon, the following procedure clips the subject polygon against the clip polygon.

How to clip the edges of a convex polygon?

A convex polygon and a convex clipping area are given. The task is to clip polygon edges using the Sutherland–Hodgman Algorithm. Input is in the form of vertices of the polygon in clockwise order. Recommended: Please try your approach on {IDE} first, before moving on to the solution. Overview of the algorithm: