Computer Graphics (June – 2016) [IDOL - Revised Course | Question Paper]

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Time: 3 Hours

Total Marks: 100

N.B.:        (1) Questions No. 1 is Compulsory.

Q.1 Attempt The Following Question: (10 Marks)
(A) Explain Refresh Cathode Ray Tube with neat diagram.
(B) Distinguish between Raster Scan Display & Random Scan Display.

Q.2 Attempt The Following Question: (15 Marks)
(A) Rasterize line AE3 having end point co-ordinates A (1 0, 20) & B (20, 12) using 5 DDA algorithm.
(B) Calculate the pixel positions along a straight line AI3 having end points A (5, 5) & B (13, 9) using Bresenhan's line drawing algorithm.
(C) Derive the steps in Midpoint circle algorithm.

Q.3 Attempt The Following Question: (15 Marks)
(A) Give the matrix representations for the following 3D transformations.
      (i) Translation
      (ii) Rotation
      (iii) Scaling
      (iv) Reflection
(B) Translate an object ABC with A (1, I), B (3,l) & C (2,3) by 2 units along x-axis & 6 units along y axis.
(C) Scale the triangle AE3C as A (2,2,), B (4,2), C (3,4) for given values of Sx & Sy.
      (i) SX = 2.5, SY = 2.5
      (ii) SX = SY = 1.5

Q.4 Attempt The Following Question: (15 Marks)
(A) A rectangle A (2, 2), B (5, 2), C (5, 3) & D (2, 3) is rotated by 90" about origin in Anticlockwise direction. Find new co-ordinate of rectangle after rotation.
(B) Find the mirror reflection of triangle P (10, 50), Q (40, 80), & R (10, 80) about Line y = 2x + 4.
(C) Scale an object ABCD with respect to point A by scalling factors Sx = 2 & Sy = 3 as A (2, 1), B (5, 1), C (5, 3), D (2, 3).

Q.5 Attempt The Following Question: (15 Marks)
(A) Explain Flood Fill Algorithm using 8 point connectivity.
(B) Explain Boundary Fill Algorithm using 4 point connectivity.
(C) Write a note on Inside-Outside Test.

Q.6 Attempt The Following Question: (15 Marks)
(A) Develop the perspective transformation of an object onto the xy-plane with the Center of projection at (100, 100, -100). What will be the projection of line segment? AB with A (150, 250, 150) & B (250, 350, 100)?
(B) State and explain steps of animation.
(C) Write a note on Key Frame animation.

Q.7 Attempt The Following Question: (15 Marks)
(A) What is shading? Explain.
(B) State the light model techniques.
(C) Write a short note on morphing & Its advantages.