Computer Graphics-Sem3-Sept-2019
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SAINTGITS COLLEGE OF APPLIED SCIENCES
INTERNAL ASSESSMENT EXAMINATION, SEPTEMBER2019
Department ofComputer Applications, Semester 3
COMPUTER GRAPHICS
Total : 80 marks Answer
Key Time:3Hours
Section
A
Answer any 10 questions.
Each question carries 2 marks.
1. Define Computer Graphics.
Definition of Computer
Graphics (2 marks). Give any two
applications.
2. What is mean by CSG?
Define
Constructive Solid Geometry and list the methods (2 marks)
3. Differentiate between Window and a
Viewport?
Window definition ( 1mark) , Viewport
definition (1 mark)
4. What is mean by Exterior Clipping?
Exterior Clipping
Definition(1 mark) with explanation(1 mark)
5. What is mean by Computer Animation?
What are its applications?
Definition (1
mark), Any two applications (1 mark)
6. What are ‘Key Frames’?
Definition (2 marks)
7. Explain
the term Frame Buffer.
Definition
and explanation (2 marks)
8. Differentiate
between Horizontal and Vertical Retrace.
Definition
( 1 mark each)
9. Explain the term ‘Refresh Display
File’.
Definition with
explanation (2 marks)
10. What is a ‘Video Controller’.
Definition
and explanation (2 marks)
11. Explain the term ‘Display Processor’.
Definition
and explanation (2 marks)
12. What is mean by Geometric transformation?
(10x2=20)
Definition
of Geometric transformation with explanation (2 marks)
Section B
Answer any six of the following. Each question
carries 5 marks.
13. Briefly explain the basic
transformations.
Define Transformation (
1 mark)
Explain Translation,
Rotation and Scaling (1 mark each)
Matrix representation and necessary
diagrams (1 mark )
14. What are Quadtrees?
Definition (1 mark)
Explanation (3 marks)
Diagrams (1 mark)
15. What is mean by polygon clipping?
Definition (1 mark)
Explanation (3 marks)
Diagrams
(1 mark)
16. Explain Rubber band method.
Define Rubber band
method (1 mark)
Explanation (3 marks)
Diagrams
(1 mark)
17. What are Composite Transformations?
Define Composite
Transformations (1 mark)
Explanation (3 marks)
Diagrams
(1 mark)
18. What are Polygon Tables?
Definition (1 mark)
Explanation (3 marks)
Diagrams
(1 mark)
19. Explain the steps in designing animation
sequence.
Definition of design of
animation sequence (1 mark)
Explanation of each step
(4 marks)
20. Explain Sweep Representations.
Definition (1 mark)
Explanation (3 marks)
Diagrams
(1 mark)
21. What is mean by Ray Casting? What is its
application in Computer Graphics?
Definition (1 mark)
Explanation (3 marks)
Diagrams
(1 mark)
(6x5=30)
Section C.
Answer any two of the
following.
Each question carries
15 marks
22. Explain the following terms in detail-
(a) Reflection (b) Shear
Explain Transformations(1 mark)
Definition of Reflection and Shear
( 1 and 1/2 mark
each)
Explanation (3 marks each)
Diagrams (2 and ½ marks each)
23 Explain the various clipping techniques
in detail.
Definition of clipping (1 mark)
Explanation of different
clipping techniques (2 and ½
marks each)
·
Point
·
Line
·
Polygon
·
Text
Diagrams
(1 mark each)
24. Explain any four Interactive picture
construction techniques.
Definition of
Interactive picture construction techniques (1 mark)
Explanation of various
techniques with diagram (2 marks each)
(1) Basic positioning methods
(2) Constraints
(3) Grid
(4) Gravity field
(5) Rubber Band Methods
(6) Dragging
(7) Painting and Drawing
25. Explain
the different three dimensional display methods.
Definition
of three dimensional display methods (2 and ½ marks)
Explanation
of each of them with necessary diagrams(2 and
¼
marks each)
1.
Parallel Projection
2.
Perspective
3.
Depth Cueing
4.
Visible Line and Surface Identification
5.
Surface Rendering
6.
Virtual Reality
(2x15=30)
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