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Posted By: Sra1 Member Level: Diamond Posted Date: 27 May 2008
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2007 Jawaharlal Nehru Technological University B.Tech Information Technology COMPUTER GRAPHICS (Supplimentary Examinations, Aug/Sep 2007) Question paper
Set No 2
-----------------
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. (a) Assuming that a certain full-color (24-bit per pixel) RGB raster system has a 512 by 512 frame buffer, how many distinct color choices (intensity levels) would be available.
(b) Explain how virtual reality systems can be used in design applications. [10+6]
2. (a) Explain the DDA scan conversion algorithm for generating the points on line
segment, when two end-points are given as input.
(b) Digitize the line with end-points (20,10) and (30,18) using DDA algorithm.
[8+8]
3. Prove that the multiplication matrices for each of the following sequence of opera-
tions is commutative [16]
(a) Two successive rotations
(b) Two successive translations
(c) Two successive scalings.
4. Let R be a rectangular window whose lower left corner is at L (-3,1) and upper
right-hand corner is at R(2,6). If the line segment is defined with two end points
with A (-4,2) and B (-1,7).
(a) The region codes of the two end points,
(b) Its clipping catezory and
(c) Stages in the clipping operations using Cohen-Sutherland algorithm. [16]
5. Explain the procedure to design two-dimensional, cubic Bezier curve shapes that
have first order piece-wise continuity. [16]
6. (a) What are the phases defined in typical viewing pipeline. Explain briefly about
each phase.
(b) Explain the steps involved in transformation form world to viewing coordinates
in 3-dimensional domain. [8+8]
7. (a) What happens when two polygons have the same z value and the z-buffer
algorithm is used?
(b) For hidden surface removal of objects with non-planar surface, which algo-
rithms (s) are suitable. Justify.
(c) What are the underlying concepts of the subdivision algorithm? [5+5+6]
8. What are the issues involved in design of a story board layout with accompanying
key frames for an animation of a single polyhedron. [16]
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