GTU BE 2019 Summer Question Papers || Gujarat Technological University
Subject Name:Computer Graphics
Time:10:30 AM TO 01:00 PM Total Marks: 70
3. Figures to the right indicate full marks.
GUJARAT TECHNOLOGICAL UNIVERSITY
SEMESTER-VI(NEW) — EXAMINATION - SUMMER 2019
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Subject Code:2160703 Date:21/05/2019Subject Name:Computer Graphics
Time:10:30 AM TO 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
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2. Make suitable assumptions wherever necessary.3. Figures to the right indicate full marks.
| MARKS | |
|---|---|
| Q.1 (a) Write a difference between Raster scan system and Random scan system. | 03 |
| (b) Explain shadow mask method in detail. | 04 |
| (c) Derive all formulas for bresenham’s line drawing algorithm. Write an algorithm for bresenham’s line drawing algorithm. | 07 |
| Q.2 (a) Write limitations of DDA line drawing method. | 03 |
| (b) Write a note on Even-Odd rule. | 04 |
| (c) Explain midpoint ellipse drawing algorithm with example. | 07 |
| OR | |
| (c) Explain scan line fill algorithm with all data structures. | 07 |
| Q.3 (a) Explain the term region codes. | 03 |
| (b) Derive 2D transformation matrix for rotation. | 04 |
| (c) Explain 2D transformation for reflection about arbitrary line. | 07 |
| OR | |
| Q.3 (a) Write a note on 2D shearing. | 03 |
| (b) The reflection along line Y=X is equivalent to reflection along x-axis followed by counter clockwise rotation by angle f. Find the value of f. | 04 |
| (c) Explain the Nicholl-Lee-Nicholl(NLN) Line Clipping algorithm in detail. | 07 |
| Q.4 (a) Compare interpolation spline and approximate spline. | 03 |
| (b) Rotate a triangle XYZ with vertices A(2,2,2),B(3,4,7) and C(8,9,12) about Y-axis in clockwise direction by angle 90 degree. | 04 |
| (c) Explain Bezier curve properties. | 07 |
| OR | |
| Q.4 (a) What is projection? List out various types of projection. | 03 |
| (b) Explain parametric and geometric continuity. | 04 |
| (c) Derive transformation matrix for 3D rotation about arbitrary line. | 07 |
| Q.5 (a) Explain YIQ color model. | 03 |
| (b) Derive a perspective projection of a point P(x,y,z) on a view plane positioned at z=0 and center of projection is on negative z-axis at distance d. | 04 |
| (c) What is depth buffer method? Explain depth buffer algorithm with example. | 07 |
| OR | |
| Q.5 (a) Explain the term hue and saturation. | 03 |
| (b) Write a note on 3D reflection. | 04 |
| (c) Briefly explain back face detection algorithm. | 07 |
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