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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 1
-----------------
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
1. (a) List and explain the applications of Computer Graphics.
(b) With a neat cross- sectional view explain the functioning of CRT devices.
[8+8]
2. (a) Write the modified version of boundary-fill algorithm for a 4-connected region
to avoid excessive stacking by incorporating scan-line methods.
(b) Devise a parallel method for implementing line-type function. [8+8]
3. Show that the order in which the transformations are performed is important by
the transformation of triangle A(1,0), B(0,1), C(1,1) by
(a) rotating 450 about the origin and then translating in the direction of vector I
by 4 units and
(b) translating and then rotation. [8+8]
4. Explain the algorithm for line clipping by Cohen-Sutherland algorithm. Demon-
strate with an example all the three cases of lines. [16]
5. Given the plane parameters A, B, C and D for all surfaces of an object, explain the
procedure to determine whether any specified point is inside or outside the object.
[16]
6. Prove that the multiplication of three-dimensional transformation matrices for each
of the following sequence of operations is commutative.
(a) Any two successive translations
(b) Any two successive saling operations
(c) Any two successive rotations about any one of the coordinate axes. [16]
7. (a) Explain about the octree method for visible surface detection.
(b) Write an algorithm for back-face detection using a perspective projection to
view visible faces of a convex polyhedron. [8+8]
8. Explain the procedure to simulate the linear, two-dimensional motion of a filled
circle inside a given rectangular area. The circle is to be given an initial velocity
and the circle is to rebound from the walls with the angle of reflection equal to the
angle of incidence. [16]
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