What is Cohen Sutherland 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 polygons are used in Sutherland Hodgman clipping method?
Two polygons
Explanation: The Sutherland–Hodgman algorithm is used for clipping polygons. Cohen- Sutherland is line clipping algorithm. 2. How many polygons are used in this method? Explanation: Two polygons are used in this algorithm namely clip polygon and subject polygon.
Can Cohen Sutherland clipping be used to clip a polygon *?
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. First the polygon is clipped against the left edge of the polygon window to get new vertices of the polygon.
What is limitation of Cohen-Sutherland line clipping algorithm?
What is the limitation of Cohen Sutherland algorithm? Cohen Sutherland algorithm works only for rectangular clip window which means if the area of interest has any other shape than a rectangle, it will not work.
What is the advantage of Cohen-Sutherland line clipping?
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 many polygons are used in Weiler Atherton polygon clipping method?
Hence, we were able to get two sub-polygons as a result of this polygon clipping, which involved a concave polygon, which resulted in: Similarly, this clipping works for convex polygons.
Which polygon is an disadvantage of Sutherland Hodgman polygon clipping algorithm?
4) If both input vertices are outside the window boundary, nothing is added to the output list. These 4 cases are shown in the figure. Disadvantages: Convex polygons are correctly clipped by the Sutherland-Hodgeman Algorithm. But, concave polygons cannot be clipped correctly.
What is Cyrus Beck line clipping algorithm?
Cyrus Beck is a line clipping algorithm that is made for convex polygons. It allows line clipping for non-rectangular windows, unlike Cohen Sutherland or Nicholl Le Nicholl. It also removes the repeated clipping needed in Cohen Sutherland.
What is the significance of 4 bit region code is Cohen Sutherland algorithm?
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.
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.
What is Sutherland Hodgman 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.