- What is Cohen Sutherland line clipping algorithm?
- How many types of clipping are there?
- Can we use line clipping algorithm for polygon clipping?
- What are drawback of Cohen Sutherland line clipping algorithm?
- How do you solve Cohen Sutherland problem?
- What is clipping and its types?
- What is line clipping algorithm?
- When PK 0 then the line is?
- What are the advantages of Cohen Sutherland line clipping algorithm?
- What are the steps of line clipping?
- What is the aim of line clipping algorithms?
- What does windowing mean?
- What viewport defines?
- What is windowing and clipping?
- What is meant by generalized clipping?
What is Cohen Sutherland line clipping algorithm?
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 types of clipping are there?
four typesThere are four types of possible clipping processes, depending on which part of the word undergoes structural changes: back-clipping (temperature — temp, rhino — rhinoceros, gym — gymnasium), fore-clipping (helicopter — copter, telephone — phone, plane, aeroplane), mixed clipping (influenza — flu, refrigerator — fridge …
Can we 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. … Then each edge of the polygonal window is transformed by a shearing transformation with the same parameters as those used to the line.
What are drawback of Cohen Sutherland line clipping algorithm?
Limitations of Cohen-Sutherland clipping algorithm Clipping window region can be rectangular in shape only and no other polygonal shaped window is allowed. Edges of rectangular shaped clipping window has to be parallel to the x-axis and y-axis.More items…•
How do you solve Cohen Sutherland problem?
– 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 region code of the line is (0000)=> visible.
What is clipping and its types?
Types of Clipping: Line Clipping. Area Clipping (Polygon) Curve Clipping. Text Clipping.
What 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.
When PK 0 then the line is?
Explanation: When pk < 0 line starts exceeding the boundary while if pk > 0 line is bounded inside the boundary. When the line is parallel then pk = 0.
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.
What are the steps of line clipping?
AlgorithmStep 1 − Assign a region code for each endpoints.Step 2 − If both endpoints have a region code 0000 then accept this line.Step 3 − Else, perform the logical ANDoperation for both region codes.Step 3.1 − If the result is not 0000, then reject the line.Step 3.2 − Else you need clipping.Step 3.2. … Step 3.2.More items…
What is the aim of line clipping algorithms?
Line Clipping Algorithms: “the Cohen-Sutherland algorithm is efficient where outcode testing can be done cheaply (for example, by doing bitwise operations in assembly language) and trivial acceptance or rejections is applicable to the majority of line segments.
What does windowing mean?
: having windows especially of a specified kind —often used in combination.
What viewport defines?
A viewport defines in normalized coordinates a rectangular area on the display device where the image of the data appears. … You define a viewport with the GPORT command. You can have your graph take up the entire display device or show it in only a portion, say the upper right part.
What is windowing and clipping?
The capability that show some part of object internal a specify window is called windowing and a rectangular region in a world coordinate system is called window. … Points and lines which are outside the window are “cut off” from view. This process of “cutting off” parts of the image of the world is called Clipping.
What is meant by generalized clipping?
In a generalized clipping operation, both the objects being drawn and the clipping region are represented as generalized polygons with a non-zero winding number. An object may be entered and clipped by simply tracing its boundary and the clipping region boundary.