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B.Tech (SEM V) ODD SEMESTER THEORY EXAMINATION 2009-10 COMPUTER GRAPHICS - .

Answer any four questions :

SX4=20

(a)

Write a general function for Rasterizatiol1.

(b)

Explain the role of pixel and frame buffer in graphics devices.

(c)

How much time is spent scanning across each row of pixels during screen refresh on a raster system with resolution of 1280 x 1024 and a refresh rate of 60 frames per second ?

(d)

Consider two raster systems with resolutions of. 640 x 480 and 1280 x 1024. How many pixels could be accessed per second in each of these systems by a display controller that refreshes the screen at a rate of 60 frames per second ?

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(e)

Explain how to display file structure and control ; test.

(f)

Compare the computation done in Digital Differential Analyzer (DDA) algorithm with Bresenham's line drawing algorithm.

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any four questions

Answer (a)

What is a segment

:

Sx4 20

and segment

table

(c)

What is echoing and its use ? Write different interactive techniques in computer graphics.

(a)

Make a comparison of Bezier, Hermite B-spline algorithms for curve generation.

and

(b)

List the advantages and disadvantages Back-face dete~ti~ Dept-Buffer method A Buffer method.

of and

Writ'

the utility of segment. (b)

Write a procedure

for creating,

deleting

and

renaming segments. (c)

Explain visibility in detail.

(d)

Write

a boundary

8-connected (e)

Explain

to

fill an

region.

scan fill algorithm

suitable (f)

fill procedure

(c)

with the help of ~

example.

Explain

'Explain in detail different illumination and different Randering methods.

/'

different

procedures

for

image

transformation. 3

Attempt any two questions: (a)

Write a procedure for rotation and translation transformation. Derive reflection metrics for reflection

(b)

10x2=20

Write

about the X axis.

and

clipping,

compare

Cohen-Sutherland

Liang-Barsky

Nicholl-Lee- Nicholl (c)

line

clipping

and

clipping.

What is window-to-view point coordinate t I an~lormation ? What are issues related to multiple

wind owing

?

Attempt any two questions: (a)

line

line

,/ " :-

10x2=20

I~xplaill parallel projection, perspective projection And d pI h curing projection for 3-D display

methnc!s.

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