GTU BE/B.Tech 2018 Winter Question Papers || Gujarat Technological University
GUJARAT TECHNOLOGICAL UNIVERSITY
BE - SEMESTER-V (NEW) EXAMINATION - WINTER 2018
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Subject Code:2151603 Date:16/11/2018
Subject Name:Computer Graphics
Time: 10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
- Attempt all questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| MARKS | ||
| Q.1 | (a) What size of frame buffer (in bytes) is needed for raster system with resolution of 640 x 480 to store 12 bits per pixel? | 03 |
| (b) Explain beam penetration method in detail. | 04 | |
| (c) Write an algorithm for Bresenham’s line drawing algorithm. | 07 | |
| Q.2 | (a) Write limitations of DDA line drawing method. | 03 |
| (b) Explain bitmap method used for character generation. | 04 | |
| (c) Explain flood fill algorithm in detail. | 07 | |
| OR | ||
| (c) Explain midpoint circle drawing algorithm in detail. | 07 | |
| Q.3 | (a) Write a note on window to viewport transformation. | 03 |
| (b) Translate a Square ABCD with the coordinates A (0, 0), B (5, 0), C(5,5),D (0, 5) by 2 units in X-direction and 3 units in Y-direction. | 04 | |
| (c) Explain 2D transformation for rotation about arbitrary point. | 07 | |
| OR | ||
| Q.3 | (a) Write a note on 2D shearing. | 03 |
| (b) Show that two dimensional reflection through x-axis followed by two dimensional reflection through line y=-X is equivalent to pure rotation about origin by 270 degree. | 04 | |
| (c) Explain the Cohen-Sutherland line clipping algorithm in detail. | 07 | |
| Q.4 | (a) Define: 1) Parametric continuity 2) Geometric continuity | 03 |
| (b) What is projection? List-out various types of projection. | 04 | |
| (c) Derive transformation matrix for 3D rotation about axis which is parallel to any one of the co-ordinate axis. | 07 | |
| OR | ||
| Q.4 | (a) Write conditions for cavalier and cabinet projection. | 03 |
| (b) Write a note on 3D Reflection. | 04 | |
| (c) Explain Bezier curve properties. | 07 | |
| Q.5 | (a) Explain RGB color model. | 03 |
| (b) Check parametric continuity c’c! and ¢? for two curves P(t)=(t*+2t- 2,t2) and Q(t) =(t*+2t+1,t+1) at P(1)=Q(0). | 04 | |
| (c) Explain Depth-Buffer method. | 07 | |
| OR | ||
| Q.5 | (a) Explain YIQ color model. | 03 |
| (b) Briefly explain z-buffer visible surface determination algorithm. | 04 | |
| (c) Derive transformation matrix for parallel projection onto xy plane. | 07 |
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