Download AKTU B-Tech 5th Sem 2015-2016 Computer Graphics Ecs 504 Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 5th Semester (Fifth Semester) 2015-2016 Computer Graphics Ecs 504 Question Paper

Printed Pages : 4 ' 47 ? ECS-504
(Following Paper ID and Roll No. to be ?lled in your
Answer Book)
Roll No.
B.Tech.
(SEM. V) THEORY EXAMINATION, 2015-16
COMPUTER GRAPHICS
[Time : 3 hours] [MaximumMarks : 100]
Nate : Attempt questions from all Sections as per directions.
Section-A
l. Attempt all parts of this Section. Answer in brief.
- (2x10=20)
(a) Give Window to viewport transformation matrix.
. (b) We require large refresh rate mainly due to short
persistence of phosphor. Why not use a long ?
persistence of phosphor instead to reduCe the
frame rate? '
(c) What is resolution?
(d) De?ne computer graphics.
(e) De?ne polygon.
Q
18300 (1) P.T.O.

' Attempt any ?ve questions from this section.
18300 (2)
(I) What is transformation?
(g) What is translation?
(h) De?ne clipping.
(i) De?ne B-Spline curve
0) What is a spline?
Section-B
(1'0x5='50)
Rotate a triangle at A (0, 0), B (1,1), C (5, 2) by 45?
about: ~
(i) Origin (0, 0)
(ii) Point P (- 1, -1). Find new coordinates of the
rotated figure. ?
Write Liangle Barsky algorithm for line clipping. Use
Liange Barsky line clipping algo?thm to clip the line
P1 (-15, -3 0); to P2 (30, 60) against the Window having
diagonally opposite corners as (0, 0) and (15, 15).
What is the importance of hidden line and surface
removal algorithm? Discuss the mechanism 0fZ-bu??er
surface removal algorithm and differentiate it with A-
buffer surface removal algorithm.
ECS-504
Show that the uniform scaling and rotation make
commutative pails but in general scaling and rotation are
not commutative.
Implement a back?face detection procedure using an
orthographic parallel proj ection to view visible faces of
a convex polyhedron. Assume that all parts of the obj ect
are in front of the view plane and provide a mapping onto
a screenviewport for display.
Show that the composition of two rotations is additive
by concatenating the matrix representations for R ( 0 l)
and R(92)to obtain R(61)* R(92)=: R(01+92)
Explain with example - Warnock algorithm for hidden
surface remoVal. Also draw the window tree structure
for the same example.
Des1gn a parallel version of Bresenham s algorithm for.
straight lines of any slope.
Section-C
Attempt any two questions form this section.
10.
(15x2=30)
(a) Write and explain with example weiler and
Atherton polygon clipping algorithm.
(b) Explain the workirig of colour CRT by using delta
v shadow mask method.
18300 (3) P.T.O.

11. Write short notes on any two of the following:
(a)
(b)
(C)
12.- (a)
' 03)
18300
3-D transformation
3-D proj e?tion
3-D clopping
Write an algorithm to draw Bezief curves.
What are the various back face detection
algorithms? Explain anyone of them;
(4) ECS?504