Download GTU B.Tech 2020 Winter 5th Sem 3150712 Computer Graphics Question Paper

Download GTU (Gujarat Technological University Ahmedabad) B.Tech/BE (Bachelor of Technology/ Bachelor of Engineering) 2020 Winter 5th Sem 3150712 Computer Graphics Previous Question Paper

Seat No.: ________
Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE- SEMESTER?V (NEW) EXAMINATION ? WINTER 2020
Subject Code:3150712 Date:27/01/2021
Subject Name:Computer Graphics
Time:10:30 AM TO 12:30 PM Total Marks: 56
Instructions:
1. Attempt any FOUR questions out of EIGHT questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.


MARKS
Q.1 (a) Define: 1) Aspect Ratio 2) Persistence 3) Frame Buffer.
03

(b) Consider a raster system with resolution of 1280 by 1024. What size of frame
04
buffer is needed for given system to store 24bits per pixel? How many colors are
possible in given system? What is the access time per pixel if refreshing rate is 60
frames per second?

(c) List differences between raster scan and random scan display.
07


Q.2 (a) Write a short note on Light Emitting Diodes (LED)
03

(b) What is aliasing? Briefly explain various anti-aliasing techniques.
04

(c) Explain the property of circle and calculate the pixel position along circle path with
07
radius r =10 centered on the origin using midpoint circle algorithm up to x=y.
Q.3 (a) What is inside-outside test? List out the method for inside-outside test.
03

(b) Write short note on Boundary fill (8-connected) algorithm.
04

(c) Reflect the diamond-shaped polygon whose vertices are A(?1,0), B(0, ?
07
2),C(1,0) and D(0,2) about a line y=x+2.




Q.4 (a) Write a short note on 2D Viewing Pipeline.
03

(b) Explain methods of character generation in brief.
04

(c) Prove that the multiplication of 2D transformation matrices for each of the
07
following
sequence
of
operations
is
commutative
1.Two successive rotations.
2. Two successive translations.
Q.5 (a) State necessary conditions with explanation for geometric and parametric
03
continuity.

(b) Write Short note on 1) 3D Rotation 2) 3D Translation 3) 3D Scaling.
04

(c) What is polygon clipping? Explain Sutherland-Hodgeman polygon clipping
07
algorithm with the help of an example.



Q.6 (a) Define Concave and Convex polygon with example. Also explain how to split
03
concave polygon.

(b) What is projection? List out various types of projection.
04

(c) Clip the line PQ having coordinates P(4,1), and Q(6,4) against the clipping
07
window having vertices A(3,2), B(7,2), C(7,6), and D(3,6) using Cohen
Sutherland Line Clipping Algorithm.
Q.7 (a) Write short note on RGB Color Model.
03

(b) Explain Bezier curve with necessary equations. List all properties of a Bezier curve.
04

(c) Explain z-buffer visible surface determination algorithm.
07



Q.8 (a) Write short note on CMY Color Model.
03
(b) Discuss Specular refection and Phong Model.
04
(c) Give the classification of the visible surface detection algorithm. Explain any one
07
with example.

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