What is clipping explain Cohen-Sutherland line clipping algorithm with example?

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).

What is Cohen-Sutherland and Sutherland Hodgman with an example?

Cohen Sutherland and Sutherland Hodgman clipping algorithm: The ‘Cohen – Sutherland’ algorithm is a method used for ‘line clipping’ computer graphics. The Polygon Clipping algorithm from Sutherland-Hodgeman is operated by handling the polygon boundary opposite to each window corner or side.

How do you solve Cohen Sutherland algorithm?

– If Bit-4 is 1 then the line x=xmin. – If Bit 1 is 1 then new intersection point would be y=ymax and x= x1+(ymax-y1)/m. – If Bit 2 is 1 then new intersection point would be y=ymin and x=x1+(ymin-y1)/m. S-5 : Repeat all the steps till the region code of the line is (0000)=> visible.

What is the first step of Cohen Sutherland algorithm?

Given a set of lines and a rectangular area of interest, the task is to remove lines that are outside the area of interest and clip the lines which are partially inside the area.

Which of the following categories are used in Cohen Sutherland line clipping algorithm?

Cohen Sutherland Line Clipping Algorithm: All lines come under any one of the following categories: Visible. Not Visible. Clipping Case.

Which is the clipping algorithm?

In computer graphics, the Cohen–Sutherland algorithm (named after Danny Cohen and Ivan Sutherland) is a line-clipping algorithm. The algorithm divides a 2D space into 9 regions, of which only the middle part (viewport) is visible.

What is clipping explain with example the Sutherland Hodgman polygon clipping algorithm?

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.

How do you do a line clipping?

Algorithm

  1. Step 1 − Assign a region code for each endpoints.
  2. Step 2 − If both endpoints have a region code 0000 then accept this line.
  3. Step 3 − Else, perform the logical ANDoperation for both region codes.
  4. Step 3.1 − If the result is not 0000, then reject the line.
  5. Step 3.2 − Else you need clipping.
  6. Step 3.2.
  7. Step 3.2.

Which of the following categories are used in Cohen-Sutherland line clipping algorithm?

What is the significance of 4 bit region code in Cohen-Sutherland?

Cohen-Sutherland Line Clippings: We will use 4-bits to divide the entire region. These 4 bits represent the Top, Bottom, Right, and Left of the region as shown in the following figure. Here, the TOP and LEFT bit is set to 1 because it is the TOP-LEFT corner.

What are the advantages of Cohen-Sutherland line clipping algorithm?

Advantage of Cohen Sutherland Line Clipping: It calculates end-points very quickly and rejects and accepts lines quickly. It can clip pictures much large than screen size.