K. K. Wagh Polytechnic, Nashik
Academic Year (2011

2012)
12112
Scheme:
E
Course
Code
: CM
Subject
:
Computer Graphics
Semester:
Fourth
Marks
: 100
Time
: 3
H
ou
r
s
.
Instructions to Candidates:
1.
All questions are compulsory.
2.
Illustrate your answers with neat sketches/flowchart wherever necessary.
3.
Figures to the right indicate full marks of respective
question
4.
Assume suitable additional data, if necessary.
Q.
1:
Attempt any
TEN
of the following
(10X2=20)
a)
Draw a labeled diagram of shadow mask CRT.
b)
Define view

port. Define Window.
c)
Define following:
i. Fractal.
ii. Interpolation.
d)
State
any two disadvantages of generating arc using DDA algorithm.
e)
What are the different types of 2D transformations applied to an object
f)
List four hazards of graphics standard.
g)
Define two types of the polygon and give example of each.
h)
What are the algorithms
used for filling the polygon?
i)
Define 2D Scaling.
j)
What are the drawbacks of beam penetration CRT?
k)
Write down homogenous coordinate matrix for :

2D Reflection

2D Shearing
l)
State any four application of Open GL.
Q. 2: Attempt any
FOUR of the
following
(4X4=16)
a)
Explain the working principles of Direct View Storage Tube with neat diagram.
b)
Write C code for Bresenham’s line drawing algorithm
c)
Explain homogeneous coordinates
d)
What are the advantages of midpoint subdivision line clipping
algorithm over Cohen
–
Sutherland line clipping algorithm? Which is faster? Illustrate it.
e)
Write a short note on 2D shearing.(x and y shear).
f)
Explain any four design rules of GUI.
Q. 3: Attempt any
FOUR of the following
(
4X4=16)
a)
Describe dis
play file and its structure.
b)
Explain Cohen
–
Sutherland line clipping algorithm with appropriate example.
c)
Describe Hilbert’s curve with suitable example.
d)
Explain DDA arc generation algorithm.
e)
Demonstrate with example inside outside test for polygon.
f)
State the design purpose of:
a) VDI
b) CGM
Q. 4: Attempt any FOUR of the following
(4X4=16)
a)
Illustrate the working principles of CRT with appropriate diagram.
b)
Find out the final co

ordinates of a figure bounded by the co

ordinates (1,1), (
3,4), (5,7) and
(10,3) when scaled by two units in X direction and three unit in Y direction.
c)
Define and explain normalization transformation and workstation transformation.
d)
Describe the blending function for cubic Bezier curves.
e)
State the need of adopting
graphics standard and list any four graphics standards available.
f)
Describe flood fill algorithm for filling the polygon.
Q. 5: Attempt any FOUR of the following
(4X4=16)
a)
List any eight application
of computer graphics. And explain any one of them.
b)
Write Algorithm for drawing circle using mid point circle generation algorithm.
c)
Find out final coordinates of triangle A(0, 0), B(5, 5), C(10, 0) when rotated 45° in counter
clockwise direction about arbi
trary point x(1, 1)
d)
Explain 2d rotation about arbitrary point
e)
Describe fractal and give any two examples of fractal.
f)
State advantages and disadvantages of raster scan and random scan
display.
Q. 6: Attempt any TWO of the f
ollowing
(8
X2
=16)
a)
Explain w
hy graphics standards are required? State any five graphics standards and explain
any one of them.
b)
Explain GIF file format briefly. And
l
ist any two advantages and two disadvantages of GIF file
format.
c)
Describe Sutherland

Hodgman polygon clipping
algorithm.
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