Computer Graphics (Diploma IT, VDU)

Cohen-Sutherland Line Clipping Algorithm (Detailed Explanation) The Cohen-Sutherland Line Clipping Algorithm is used to clip lines against a rectangular clipping window. It determines which portion of a line is inside the window and discards the rest. 1. Key Concepts Clipping Window: A rectangular area defined by four boundaries: Left: x m i n x_{min} ​ Right: x m a x x_{max} ​ Bottom: y m i n y_{min} ​ Top: y m a x y_{max} ​ Line Segment: Defined by two endpoints ( x 1 , y 1 ) (x_1, y_1)  and ( x 2 , y 2 ) (x_2, y_2) . Region Codes: Each point is assigned a 4-bit region code based on its position relative to the window. 2. Region Code Calculation Each point is classified into one of nine regions based on its position relative to the clipping window. The region code is a 4-bit binary value where: Bit 1 : 1 if the point is above ( TOP ), else 0 Bit 2 : 1 if the point is below ( BOTTOM ), else 0 Bit 3 : 1 if the point is right ( RIGHT )...

 Here's a C++ program to draw and fill a polygon using the scan-line filling technique. This program uses the graphics.h library, which is typically available in Turbo C++ or similar environments. If you're using modern compilers like GCC, you'll need to use other graphics libraries like OpenGL or SDL. Steps of the Algorithm Accept the vertices of the polygon. Find intersections of the scan line with polygon edges. Sort intersections by increasing x-coordinate. Fill pixels between pairs of intersections. The Scan-Line Filling algorithm is a popular technique used in computer graphics to fill polygons. It works by drawing horizontal lines (scan lines) through the entire area of the polygon and determining which parts of these scan lines are inside the polygon and should be filled. Here's a detailed explanation and C program to draw and fill a polygon using the scan-line filling technique. Steps for the Scan-Line Filling Algorithm: Input Polygon Coordinat...