What is clipping explain Cohen Sutherland algorithm for clipping 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).
How is polygon clipping done using Sutherland Hodgman 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.
Which algorithm is used for polygon clipping?
Which clipping algorithm is used for polygon clipping? Explanation: Sutherland Hodgeman polygon clipping algorithm is used for polygon clipping. In this algorithm, all the vertices of the polygon are clipped against each edge of the clipping window.
How many rules are there in Sitherland hodgeman polygon clipping?
6 Sutherland-Hodgman Polygon Clipping There are four possible cases when processing vertices in sequence around the perimeter of a polygon.
Which polygon are correctly clipped by Sutherland Hodgman clipping algorithm?
Convex polygons
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 Cohen Sutherland algorithm works difference between Cohen Sutherland and Sutherland-Hodgeman?
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 many polygons are used in Sutherland Hodgman algorithm?
How many polygons are used in this method? Explanation: Two polygons are used in this algorithm namely clip polygon and subject polygon. 3.
What is the difference between Sutherland-Hodgeman and Weiler Atherton polygon clipping?
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 is the difference between Sutherland Hodgeman and Weiler Atherton polygon clipping?