JNTU PAPERS

JNTU B.Tech II Semester Examinations,

Computer Graphics

, Apr/May 2008

(Computer Science & Engineering)

Time: 3 hours Max Marks: 80

Answer any FIVE Questions

All Questions carry equal marks

SET-II

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 how the pixel screen positions are stored and retrieved from frame buffer.

(b) What are the steps involved in mid point circle algorithm? [8+8]

3. Prove that the multiplication matrices for each of the following sequence of operations is commutative [16]

(a) Two successive rotations

(b) Two successive translations

(c) Two successive scalings.

4. (a) How the clipping-candidate (partially visible) case is handled in Cohen-Sutherland

algorithm.

(b) Derive the Window-to-View port transformation. [8+8]

5. (a) Distinguish between boundary representation and space-partitioning representation of solid object representation schemes.

(b) List and describe the polygon tables representation for polygon surfaces of a 3-D object. Give an example. [8+8]

6. Explain how the shearing of an object with respect to the three coordinate axes are

implemented. What are the corresponding input values for the shearing parameters. [16]

7. (a) Explain the depth-sorting algorithm for visible surface detection.

(b) What are the special cases in determining the depth-order of surfaces? Explain the procedure to resolve them with suitable examples. [8+8]

8. What are the steps in design of animation sequence? Describe about each step briefly. [16]