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What algorithm 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).
What is the disadvantage of Cohen Sutherland line clipping?
. Clipping windows region can be rectangular in shape only and no other polygonal shaped window is allowed. . Causes jaggiews or stair step effect.
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.
How Cohen Sutherland algorithm works difference between Cohen Sutherland and Sutherland hodgeman?
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.
Which is not line-clipping algorithm?
Southerland Hodgeman algorithm is polygon clipping method.
Which is the algorithm used for 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 to clip a line with a region code 0000?
Step 1 : Assign a region code for two endpoints of given line. Step 2 : If both endpoints have a region code 0000 then given line is completely inside. Step 3 : Else, perform the logical AND operation for both region codes. Step 3.1 : If the result is not 0000, then given line is completely outside. Step 3.2 : Else line is partially inside.
What is the 4 bit code for line clipping?
As you seen each region is denoted by a 4 bit code like 0101 for the bottom right region Four Bit code is calculated by comparing extreme end point of given line (x,y) by four co-ordinates x_min, x_max, y_max, y_min which are the coordinates of the area of interest (0000)
Is it easy to combine outcodes in a computer?
Functionality-wise it becomes very easy to check if any bits are set (just check if zero), and combining outcodes is as simple as a bitwise OR. On a side-note: Since bit-operations are fast, it is not a performance issue that the individual bits need to be extracted (e.g. outcode & BOTTOM).