GTU B.Tech 2020 Winter Question Papers || Gujarat Technological University
Subject Name: Computer Graphics
Time: 10:30 AM TO 12:30 PM Total Marks: 56
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GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER-V (NEW) EXAMINATION - WINTER 2020
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Subject Code: 2151603 Date: 03/02/2021Subject Name: Computer Graphics
Time: 10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
- Attempt any FOUR questions out of EIGHT questions.
- Make suitable assumptions wherever necessary.
- Figures to the right indicate full marks.
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| MARKS | |
|---|---|
| Q.1 | |
| (a) What is Computer Graphics? List various applications of Computer Graphics. | 03 |
| (b) How much time is spent scanning across each row of pixels during screen refresh on a raster system with resolution of 1280 X 1024 and a refresh rate of 60 frames per second? | 04 |
| (c) Write the differences between random scan display and raster scan display. | 07 |
| Q.2 | |
| (a) Explain Odd-Even rule. | 03 |
| (b) What are the differences between flood-fill and boundary fill algorithms? | 04 |
| (c) Write circle generation algorithm and explain it with example. | 07 |
| Q.3 | |
| (a) Explain Translation transformation. | 03 |
| (b) Apply the shearing transformation to square with A(0,0), B(1,0), C(1,1) and D(0,1) as given below: 1) Shear parameter value of 0.5 relative to line Yref = -1 2) Shear parameter value of 0.5 relative to line Xref = -1 | 04 |
| (c) Derive 2D reflection matrix about arbitrary line. | 07 |
| Q.4 | |
| (a) Explain Scaling transformation. | 03 |
| (b) Derive 2D transformation matrix for rotation about arbitrary point. | 04 |
| (c) Obtain the mirror reflection of the triangle ABC about the line passing through the points (4, 6) and (10,15) where A,B,C have coordinate values (0,10),(0,50) and (-20,30) respectively. | 07 |
| Q.5 | |
| (a) Write difference(s) between parallel projection and perspective projection. | 03 |
| (b) Let r(t)=(t,t?) for 0<=t<=1 & Let n(t)=2t+1,t+4t+1) for 0<=t<=1. Notice that r(1)=(1,1)=n(0) for r and n join with CO continuity:- --- Content provided by FirstRanker.com --- 1] Do n(t) and r(t) meet with C' continuity at the join point?2] Do n(t) and r(t) meet with G! continuity at the join | 04 |
| (c) Derive 3D transformation matrix for rotation about line which is parallel to any one of the co-ordinate axis. | 07 |
| Q.6 | |
| (a) Define following terms: 1) Parametric Continuity 2) Geometric Continuity | 03 |
| (b) What is projection? List out types of projection with diagram. | 04 |
| (c) Explain the Cohen Sutherland line clipping algorithm. | 07 |
| Q.7 | |
| (a) Discuss two approaches used to determine hidden surfaces. | 03 |
| (b) Briefly explain Back Face Detection algorithm. | 04 |
| (c) What is window and view-port? Retrieve equations for the scaling factors to map the window to view-port in 2D viewing system. | 07 |
| Q.8 | |
| (a) What is depth buffer method? | 03 |
| (b) List out properties of Bezier Curve. | 04 |
| (c) Explain RGB Color model in detail. | 07 |
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