Computer Graphics 2018 Question Paper — Government College of Enginee…

The 2018 Computer Graphics previous year question paper (Government College of Engineering and Technology, Jammu), with every question and its marks.

Instructions

Attempt five questions in all selecting at least two questions from each Section.
Each question carries 20 marks.

Q1 a). Explain the two techniques for producing color displays with a CRT [10 marks]
Q1 b). Explain following:- i. Aspect ratio ii. Bitmap iii. Aliasing iv. Dithering v. Refresh rate [10 marks]
Q2 a). Discuss and explain Bresenhams's line drawing algo and its advantages over DDA line drawing algo. [10 marks]
Q2 b). Digitize a line from (10, 12) to (15,15) on a raster screen using Bresenham's straight line algorithm. [10 marks]
Q3 a). Find out the coordinates of a figure bounded by (0,0),(1,5),(6,3),(-3,-4) when reflected along the line whose equation is y=2x+4 and sheared by 2 units in x direction and 2 units in y direction. [15 marks]
Q3 b). In a 512 *512 raster on a monochrome display with an average access rate of 200 nanoseconds per pixel, what is the refresh rate [5 marks]
Q4 a). Find the transformation which aligns vector V= I + J + K with vector N = 2I - J - K. [15 marks]
Q4 b). Magnify the unit cube by twice. [5 marks]

Q5 a). Differentiate between window & view port. Write the various steps for window to viewport coordinate transformation. Also derive 2D viewing transformation. [10 marks]
Q5 b). Write pseudo code procedure to implement the flood fill algorithm using the 4-connected definition for region pixels. [10 marks]
Q6 a). Describe Sutherland Hodgeman polygon clipping algorithm. What is its limitation? [10 marks]
Q6 b). Use the Cohen Sutherland outcode algorithm to clip two lines P1(40,15) to P2(75,45) and P3(70,20) to P4(100, 10) against a window A(50,10), B(80,10), C(80,40), D(50,40). [10 marks]
Q7 a). What is vanishing point. Discuss the one, two and three principle vanishing point generation. [10 marks]
Q7 b). Explain Phong shading model .Give its merits and demerits. [10 marks]
Q8. Derive the transformation for cavalier projection with Θ=45° and cabinet projection with Θ=30°.Draw the projection of the unit cube for each transformation. [20 marks]